Helena, Montana, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Helena, Montana, United States
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2026
103AQILowest AQI recorded on
8th Aug 2025
17AQISame Day Analysis (14th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 44 of Good air quality on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Helena, Montana, United States
AQI
Day
Night
.
6 AM14th Aug 2026
9 PM
5 AM15th Aug 2026
Day time
Avg. Highest Time
7AM14th Aug
52AQI
Avg. Lowest Time
6PM14th Aug
33AQI
Night time
Avg. Highest Time
10PM14th Aug
52AQI
Avg. Lowest Time
3AM15th Aug
46AQI
In the last 24 hours,
Helena's AQI reached its highest point of 52 at 7 AM during the Day, while the lowest point, 33, was recorded at 6 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Helena, Montana, United States
JulAug
17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th
Day
Night
17th Jul 2026506 AMAQI
17th Jul 2026487 AMAQI
17th Jul 2026308 AMAQI
17th Jul 2026329 AMAQI
17th Jul 20262710 AMAQI
17th Jul 20265411 AMAQI
17th Jul 20265612 PMAQI
17th Jul 2026621 PMAQI
17th Jul 2026482 PMAQI
17th Jul 2026483 PMAQI
17th Jul 2026464 PMAQI
17th Jul 2026505 PMAQI
17th Jul 2026506 PMAQI
17th Jul 2026387 PMAQI
17th Jul 2026318 PMAQI
17th Jul 2026509 PMAQI
17th Jul 20265410 PMAQI
17th Jul 20263011 PMAQI
18th Jul 20263412 AMAQI
18th Jul 2026381 AMAQI
18th Jul 2026532 AMAQI
18th Jul 2026583 AMAQI
18th Jul 2026584 AMAQI
18th Jul 2026565 AMAQI
25°C18/35°C
18th Jul 2026596 AMAQI
18th Jul 2026667 AMAQI
18th Jul 2026668 AMAQI
18th Jul 2026679 AMAQI
18th Jul 20266210 AMAQI
18th Jul 20265211 AMAQI
18th Jul 20267412 PMAQI
18th Jul 2026641 PMAQI
18th Jul 2026602 PMAQI
18th Jul 2026443 PMAQI
18th Jul 2026554 PMAQI
18th Jul 2026465 PMAQI
18th Jul 2026446 PMAQI
18th Jul 2026427 PMAQI
18th Jul 2026468 PMAQI
18th Jul 2026569 PMAQI
18th Jul 20264610 PMAQI
18th Jul 20264011 PMAQI
19th Jul 20264412 AMAQI
19th Jul 2026541 AMAQI
19th Jul 2026452 AMAQI
19th Jul 2026483 AMAQI
19th Jul 2026514 AMAQI
19th Jul 2026465 AMAQI
24°C15/35°C
19th Jul 2026526 AMAQI
19th Jul 2026557 AMAQI
19th Jul 2026558 AMAQI
19th Jul 2026629 AMAQI
19th Jul 20266210 AMAQI
19th Jul 20266211 AMAQI
19th Jul 20266812 PMAQI
19th Jul 2026621 PMAQI
19th Jul 2026632 PMAQI
19th Jul 2026653 PMAQI
19th Jul 2026534 PMAQI
19th Jul 2026675 PMAQI
19th Jul 2026646 PMAQI
19th Jul 2026547 PMAQI
19th Jul 2026428 PMAQI
19th Jul 2026489 PMAQI
19th Jul 20264610 PMAQI
19th Jul 20265111 PMAQI
20th Jul 20265212 AMAQI
20th Jul 2026511 AMAQI
20th Jul 2026502 AMAQI
20th Jul 2026423 AMAQI
20th Jul 2026464 AMAQI
20th Jul 2026445 AMAQI
26°C18/34°C
20th Jul 2026466 AMAQI
20th Jul 2026447 AMAQI
20th Jul 2026488 AMAQI
20th Jul 2026469 AMAQI
20th Jul 20265010 AMAQI
20th Jul 20265411 AMAQI
20th Jul 20264612 PMAQI
20th Jul 2026501 PMAQI
20th Jul 2026512 PMAQI
20th Jul 2026523 PMAQI
20th Jul 2026464 PMAQI
20th Jul 2026405 PMAQI
20th Jul 2026426 PMAQI
20th Jul 2026607 PMAQI
20th Jul 2026448 PMAQI
20th Jul 20264610 PMAQI
20th Jul 20264611 PMAQI
21st Jul 20264412 AMAQI
21st Jul 2026461 AMAQI
21st Jul 2026512 AMAQI
21st Jul 2026463 AMAQI
21st Jul 2026484 AMAQI
21st Jul 2026465 AMAQI
23°C15/30°C
21st Jul 2026526 AMAQI
21st Jul 2026537 AMAQI
21st Jul 2026508 AMAQI
21st Jul 2026539 AMAQI
21st Jul 20265310 AMAQI
21st Jul 20265211 AMAQI
21st Jul 20265312 PMAQI
21st Jul 2026561 PMAQI
21st Jul 2026522 PMAQI
21st Jul 2026523 PMAQI
21st Jul 2026534 PMAQI
21st Jul 2026565 PMAQI
21st Jul 2026656 PMAQI
21st Jul 2026517 PMAQI
21st Jul 2026488 PMAQI
21st Jul 2026519 PMAQI
21st Jul 20265110 PMAQI
21st Jul 20265111 PMAQI
22nd Jul 20264812 AMAQI
22nd Jul 2026441 AMAQI
22nd Jul 2026482 AMAQI
22nd Jul 2026483 AMAQI
22nd Jul 2026554 AMAQI
22nd Jul 2026465 AMAQI
24°C16/33°C
22nd Jul 2026466 AMAQI
22nd Jul 2026427 AMAQI
22nd Jul 2026548 AMAQI
22nd Jul 2026519 AMAQI
22nd Jul 20265410 AMAQI
22nd Jul 20265411 AMAQI
22nd Jul 20264412 PMAQI
22nd Jul 2026441 PMAQI
22nd Jul 2026482 PMAQI
22nd Jul 2026513 PMAQI
22nd Jul 2026554 PMAQI
22nd Jul 2026555 PMAQI
22nd Jul 2026536 PMAQI
22nd Jul 2026517 PMAQI
22nd Jul 2026538 PMAQI
22nd Jul 2026539 PMAQI
22nd Jul 20265310 PMAQI
22nd Jul 20265411 PMAQI
23rd Jul 20265112 AMAQI
23rd Jul 2026441 AMAQI
23rd Jul 2026572 AMAQI
23rd Jul 2026583 AMAQI
23rd Jul 2026564 AMAQI
23rd Jul 2026445 AMAQI
26°C19/34°C
23rd Jul 2026666 AMAQI
23rd Jul 2026557 AMAQI
23rd Jul 2026508 AMAQI
23rd Jul 2026549 AMAQI
23rd Jul 20264910 AMAQI
23rd Jul 20264811 AMAQI
23rd Jul 20264612 PMAQI
23rd Jul 2026441 PMAQI
23rd Jul 2026442 PMAQI
23rd Jul 2026463 PMAQI
23rd Jul 2026444 PMAQI
23rd Jul 2026725 PMAQI
23rd Jul 2026446 PMAQI
23rd Jul 2026507 PMAQI
23rd Jul 2026538 PMAQI
23rd Jul 2026629 PMAQI
23rd Jul 20266210 PMAQI
23rd Jul 20266211 PMAQI
24th Jul 20266012 AMAQI
24th Jul 2026571 AMAQI
24th Jul 2026542 AMAQI
24th Jul 2026543 AMAQI
24th Jul 2026534 AMAQI
24th Jul 2026505 AMAQI
27°C18/35°C
24th Jul 2026446 AMAQI
24th Jul 2026507 AMAQI
24th Jul 2026428 AMAQI
24th Jul 2026429 AMAQI
24th Jul 20264610 AMAQI
24th Jul 20265511 AMAQI
24th Jul 20264812 PMAQI
24th Jul 2026481 PMAQI
24th Jul 2026692 PMAQI
24th Jul 2026653 PMAQI
24th Jul 2026404 PMAQI
24th Jul 2026675 PMAQI
24th Jul 2026586 PMAQI
24th Jul 2026557 PMAQI
24th Jul 2026668 PMAQI
24th Jul 2026609 PMAQI
24th Jul 20265810 PMAQI
24th Jul 20264211 PMAQI
25th Jul 20264412 AMAQI
25th Jul 2026461 AMAQI
25th Jul 2026442 AMAQI
25th Jul 2026483 AMAQI
25th Jul 2026514 AMAQI
25th Jul 2026505 AMAQI
27°C17/36°C
25th Jul 2026486 AMAQI
25th Jul 2026537 AMAQI
25th Jul 2026548 AMAQI
25th Jul 2026559 AMAQI
25th Jul 20265710 AMAQI
25th Jul 20265611 AMAQI
25th Jul 20265712 PMAQI
25th Jul 2026571 PMAQI
25th Jul 2026462 PMAQI
25th Jul 2026623 PMAQI
25th Jul 2026594 PMAQI
25th Jul 2026585 PMAQI
25th Jul 2026636 PMAQI
25th Jul 2026557 PMAQI
25th Jul 2026558 PMAQI
25th Jul 2026559 PMAQI
25th Jul 20266410 PMAQI
25th Jul 20266711 PMAQI
26th Jul 20266412 AMAQI
26th Jul 2026621 AMAQI
26th Jul 2026652 AMAQI
26th Jul 2026713 AMAQI
26th Jul 2026704 AMAQI
26th Jul 2026695 AMAQI
29°C17/39°C
26th Jul 2026626 AMAQI
26th Jul 2026647 AMAQI
26th Jul 2026528 AMAQI
26th Jul 2026669 AMAQI
26th Jul 20266310 AMAQI
26th Jul 20265711 AMAQI
26th Jul 20267312 PMAQI
26th Jul 2026741 PMAQI
26th Jul 2026872 PMAQI
26th Jul 2026943 PMAQI
26th Jul 2026904 PMAQI
26th Jul 2026965 PMAQI
26th Jul 2026816 PMAQI
26th Jul 2026737 PMAQI
26th Jul 2026648 PMAQI
26th Jul 2026739 PMAQI
26th Jul 20268810 PMAQI
26th Jul 20269911 PMAQI
27th Jul 202610212 AMAQI
27th Jul 20261101 AMAQI
27th Jul 20261062 AMAQI
27th Jul 20261163 AMAQI
27th Jul 20261144 AMAQI
27th Jul 20261255 AMAQI
27°C17/36°C
27th Jul 20261186 AMAQI
27th Jul 20261157 AMAQI
27th Jul 20261128 AMAQI
27th Jul 20261189 AMAQI
27th Jul 202611910 AMAQI
27th Jul 202611911 AMAQI
27th Jul 202612412 PMAQI
27th Jul 20261051 PMAQI
27th Jul 20261122 PMAQI
27th Jul 20261023 PMAQI
27th Jul 20261054 PMAQI
27th Jul 20261105 PMAQI
27th Jul 20261086 PMAQI
27th Jul 20261057 PMAQI
27th Jul 20261088 PMAQI
27th Jul 20261059 PMAQI
27th Jul 202610510 PMAQI
27th Jul 202610811 PMAQI
28th Jul 202611512 AMAQI
28th Jul 20261051 AMAQI
28th Jul 20261082 AMAQI
28th Jul 20261023 AMAQI
28th Jul 20261024 AMAQI
28th Jul 2026995 AMAQI
26°C18/34°C
28th Jul 20261026 AMAQI
28th Jul 2026997 AMAQI
28th Jul 20261048 AMAQI
28th Jul 20261029 AMAQI
28th Jul 20269610 AMAQI
28th Jul 20269011 AMAQI
28th Jul 20269012 PMAQI
28th Jul 2026901 PMAQI
28th Jul 2026922 PMAQI
28th Jul 2026853 PMAQI
28th Jul 2026814 PMAQI
28th Jul 2026835 PMAQI
28th Jul 2026766 PMAQI
28th Jul 2026787 PMAQI
28th Jul 2026768 PMAQI
28th Jul 2026769 PMAQI
28th Jul 20268210 PMAQI
28th Jul 20268011 PMAQI
29th Jul 20267812 AMAQI
29th Jul 2026831 AMAQI
29th Jul 2026832 AMAQI
29th Jul 2026813 AMAQI
29th Jul 2026814 AMAQI
29th Jul 2026845 AMAQI
26°C18/35°C
29th Jul 2026806 AMAQI
29th Jul 2026837 AMAQI
29th Jul 2026818 AMAQI
29th Jul 2026849 AMAQI
29th Jul 20268510 AMAQI
29th Jul 20268011 AMAQI
29th Jul 20267912 PMAQI
29th Jul 2026801 PMAQI
29th Jul 2026802 PMAQI
29th Jul 2026843 PMAQI
29th Jul 2026864 PMAQI
29th Jul 2026855 PMAQI
29th Jul 2026846 PMAQI
29th Jul 2026837 PMAQI
29th Jul 2026808 PMAQI
29th Jul 2026769 PMAQI
29th Jul 20267310 PMAQI
29th Jul 20267111 PMAQI
30th Jul 20266812 AMAQI
30th Jul 2026701 AMAQI
30th Jul 2026702 AMAQI
30th Jul 2026603 AMAQI
30th Jul 2026624 AMAQI
30th Jul 2026585 AMAQI
26°C17/35°C
30th Jul 2026586 AMAQI
30th Jul 2026567 AMAQI
30th Jul 2026628 AMAQI
30th Jul 2026669 AMAQI
30th Jul 20266710 AMAQI
30th Jul 20266211 AMAQI
30th Jul 20266212 PMAQI
30th Jul 2026571 PMAQI
30th Jul 2026542 PMAQI
30th Jul 2026543 PMAQI
30th Jul 2026544 PMAQI
30th Jul 2026655 PMAQI
30th Jul 2026766 PMAQI
30th Jul 2026627 PMAQI
30th Jul 2026578 PMAQI
30th Jul 2026609 PMAQI
30th Jul 20266810 PMAQI
30th Jul 20266911 PMAQI
31st Jul 20265712 AMAQI
31st Jul 2026571 AMAQI
31st Jul 2026562 AMAQI
31st Jul 2026653 AMAQI
31st Jul 2026624 AMAQI
31st Jul 2026595 AMAQI
27°C18/35°C
31st Jul 2026546 AMAQI
31st Jul 2026567 AMAQI
31st Jul 2026558 AMAQI
31st Jul 2026559 AMAQI
31st Jul 20265510 AMAQI
31st Jul 20266211 AMAQI
31st Jul 20266412 PMAQI
31st Jul 2026681 PMAQI
31st Jul 2026712 PMAQI
31st Jul 2026643 PMAQI
31st Jul 2026584 PMAQI
31st Jul 2026575 PMAQI
31st Jul 2026626 PMAQI
31st Jul 2026537 PMAQI
31st Jul 2026538 PMAQI
31st Jul 2026549 PMAQI
31st Jul 20265210 PMAQI
31st Jul 20265911 PMAQI
1st Aug 20265712 AMAQI
1st Aug 2026621 AMAQI
1st Aug 2026642 AMAQI
1st Aug 2026663 AMAQI
1st Aug 2026674 AMAQI
1st Aug 2026625 AMAQI
26°C16/35°C
1st Aug 2026606 AMAQI
1st Aug 2026627 AMAQI
1st Aug 2026698 AMAQI
1st Aug 2026679 AMAQI
1st Aug 20266310 AMAQI
1st Aug 20266211 AMAQI
1st Aug 20266012 PMAQI
1st Aug 2026601 PMAQI
1st Aug 2026602 PMAQI
1st Aug 2026583 PMAQI
1st Aug 2026514 PMAQI
1st Aug 2026755 PMAQI
1st Aug 2026886 PMAQI
1st Aug 2026557 PMAQI
1st Aug 2026598 PMAQI
1st Aug 2026609 PMAQI
1st Aug 20266410 PMAQI
1st Aug 20267611 PMAQI
2nd Aug 20267412 AMAQI
2nd Aug 2026731 AMAQI
2nd Aug 2026802 AMAQI
2nd Aug 2026853 AMAQI
2nd Aug 2026854 AMAQI
2nd Aug 2026805 AMAQI
28°C17/39°C
2nd Aug 2026766 AMAQI
2nd Aug 2026717 AMAQI
2nd Aug 2026698 AMAQI
2nd Aug 2026709 AMAQI
2nd Aug 20266210 AMAQI
2nd Aug 20266011 AMAQI
2nd Aug 20266812 PMAQI
2nd Aug 2026801 PMAQI
2nd Aug 2026802 PMAQI
2nd Aug 2026883 PMAQI
2nd Aug 2026854 PMAQI
2nd Aug 2026905 PMAQI
2nd Aug 2026766 PMAQI
2nd Aug 2026647 PMAQI
2nd Aug 2026528 PMAQI
2nd Aug 2026509 PMAQI
2nd Aug 20267010 PMAQI
2nd Aug 20268511 PMAQI
3rd Aug 20269612 AMAQI
3rd Aug 20261001 AMAQI
3rd Aug 2026532 AMAQI
3rd Aug 2026653 AMAQI
3rd Aug 20261084 AMAQI
3rd Aug 20261495 AMAQI
23°C17/29°C
3rd Aug 20261506 AMAQI
3rd Aug 2026927 AMAQI
3rd Aug 2026668 AMAQI
3rd Aug 2026569 AMAQI
3rd Aug 202613210 AMAQI
3rd Aug 202612111 AMAQI
3rd Aug 202610012 PMAQI
3rd Aug 20261021 PMAQI
3rd Aug 2026942 PMAQI
3rd Aug 2026443 PMAQI
3rd Aug 2026554 PMAQI
3rd Aug 2026555 PMAQI
3rd Aug 2026516 PMAQI
3rd Aug 2026517 PMAQI
3rd Aug 2026588 PMAQI
3rd Aug 2026569 PMAQI
3rd Aug 20265310 PMAQI
3rd Aug 20264911 PMAQI
4th Aug 20265412 AMAQI
4th Aug 2026561 AMAQI
4th Aug 2026522 AMAQI
4th Aug 2026533 AMAQI
4th Aug 2026574 AMAQI
4th Aug 2026595 AMAQI
17°C12/23°C
4th Aug 2026536 AMAQI
4th Aug 2026527 AMAQI
4th Aug 2026528 AMAQI
4th Aug 2026449 AMAQI
4th Aug 20265010 AMAQI
4th Aug 20265311 AMAQI
4th Aug 20265812 PMAQI
4th Aug 2026591 PMAQI
4th Aug 2026582 PMAQI
4th Aug 2026563 PMAQI
4th Aug 2026574 PMAQI
4th Aug 2026585 PMAQI
4th Aug 2026546 PMAQI
4th Aug 2026577 PMAQI
4th Aug 2026588 PMAQI
4th Aug 2026559 PMAQI
4th Aug 20265710 PMAQI
4th Aug 20265711 PMAQI
5th Aug 20265912 AMAQI
5th Aug 2026591 AMAQI
5th Aug 2026572 AMAQI
5th Aug 2026563 AMAQI
5th Aug 2026564 AMAQI
5th Aug 2026515 AMAQI
18°C9/27°C
5th Aug 2026506 AMAQI
5th Aug 2026467 AMAQI
5th Aug 2026448 AMAQI
5th Aug 2026519 AMAQI
5th Aug 20265010 AMAQI
5th Aug 20265611 AMAQI
5th Aug 20265112 PMAQI
5th Aug 2026591 PMAQI
5th Aug 2026532 PMAQI
5th Aug 2026503 PMAQI
5th Aug 2026574 PMAQI
5th Aug 2026555 PMAQI
5th Aug 2026766 PMAQI
5th Aug 2026867 PMAQI
5th Aug 2026768 PMAQI
5th Aug 2026729 PMAQI
5th Aug 20267810 PMAQI
5th Aug 202610011 PMAQI
6th Aug 202611112 AMAQI
6th Aug 20261021 AMAQI
6th Aug 20261022 AMAQI
6th Aug 20261003 AMAQI
6th Aug 2026934 AMAQI
6th Aug 2026845 AMAQI
21°C10/30°C
6th Aug 2026886 AMAQI
6th Aug 2026817 AMAQI
6th Aug 2026818 AMAQI
6th Aug 2026849 AMAQI
6th Aug 20268010 AMAQI
6th Aug 20268611 AMAQI
6th Aug 20268712 PMAQI
6th Aug 2026861 PMAQI
6th Aug 2026832 PMAQI
6th Aug 2026873 PMAQI
6th Aug 2026934 PMAQI
6th Aug 20261025 PMAQI
6th Aug 20261426 PMAQI
6th Aug 20261287 PMAQI
6th Aug 20261368 PMAQI
6th Aug 20261429 PMAQI
6th Aug 202614410 PMAQI
6th Aug 202613911 PMAQI
7th Aug 202610412 AMAQI
7th Aug 2026941 AMAQI
7th Aug 2026972 AMAQI
7th Aug 2026963 AMAQI
7th Aug 2026984 AMAQI
7th Aug 2026945 AMAQI
22°C11/32°C
7th Aug 2026986 AMAQI
7th Aug 20261057 AMAQI
7th Aug 2026948 AMAQI
7th Aug 2026999 AMAQI
7th Aug 20269810 AMAQI
7th Aug 20269211 AMAQI
7th Aug 202610012 PMAQI
7th Aug 2026901 PMAQI
7th Aug 2026962 PMAQI
7th Aug 2026923 PMAQI
7th Aug 2026994 PMAQI
7th Aug 20261005 PMAQI
7th Aug 20261086 PMAQI
7th Aug 20261147 PMAQI
7th Aug 20261058 PMAQI
7th Aug 20261049 PMAQI
7th Aug 20269510 PMAQI
7th Aug 202610211 PMAQI
8th Aug 202610812 AMAQI
8th Aug 2026961 AMAQI
8th Aug 20261082 AMAQI
8th Aug 20261023 AMAQI
8th Aug 2026994 AMAQI
8th Aug 20261005 AMAQI
24°C13/34°C
8th Aug 2026986 AMAQI
8th Aug 2026907 AMAQI
8th Aug 2026878 AMAQI
8th Aug 2026989 AMAQI
8th Aug 20268710 AMAQI
8th Aug 20268711 AMAQI
8th Aug 20269212 PMAQI
8th Aug 2026941 PMAQI
8th Aug 2026972 PMAQI
8th Aug 2026923 PMAQI
8th Aug 2026994 PMAQI
8th Aug 2026735 PMAQI
8th Aug 2026696 PMAQI
8th Aug 2026717 PMAQI
8th Aug 2026738 PMAQI
8th Aug 2026729 PMAQI
8th Aug 20267610 PMAQI
8th Aug 20268511 PMAQI
9th Aug 20269012 AMAQI
9th Aug 20261011 AMAQI
9th Aug 2026962 AMAQI
9th Aug 2026873 AMAQI
9th Aug 2026824 AMAQI
9th Aug 2026805 AMAQI
25°C15/34°C
9th Aug 2026826 AMAQI
9th Aug 2026787 AMAQI
9th Aug 2026848 AMAQI
9th Aug 2026889 AMAQI
9th Aug 20268010 AMAQI
9th Aug 20268611 AMAQI
9th Aug 20268412 PMAQI
9th Aug 2026871 PMAQI
9th Aug 2026852 PMAQI
9th Aug 2026843 PMAQI
9th Aug 2026824 PMAQI
9th Aug 2026785 PMAQI
9th Aug 2026686 PMAQI
9th Aug 2026667 PMAQI
9th Aug 2026738 PMAQI
9th Aug 2026879 PMAQI
9th Aug 20269010 PMAQI
9th Aug 202610611 PMAQI
10th Aug 20269712 AMAQI
10th Aug 2026981 AMAQI
10th Aug 2026972 AMAQI
10th Aug 2026993 AMAQI
10th Aug 2026944 AMAQI
10th Aug 2026995 AMAQI
25°C15/33°C
10th Aug 2026976 AMAQI
10th Aug 2026947 AMAQI
10th Aug 2026998 AMAQI
10th Aug 2026949 AMAQI
10th Aug 202610410 AMAQI
10th Aug 20269511 AMAQI
10th Aug 20269712 PMAQI
10th Aug 2026991 PMAQI
10th Aug 2026982 PMAQI
10th Aug 2026983 PMAQI
10th Aug 2026964 PMAQI
10th Aug 20261025 PMAQI
10th Aug 2026946 PMAQI
10th Aug 2026947 PMAQI
10th Aug 2026928 PMAQI
10th Aug 2026929 PMAQI
10th Aug 20268410 PMAQI
10th Aug 20266611 PMAQI
11th Aug 20267612 AMAQI
11th Aug 2026831 AMAQI
11th Aug 2026822 AMAQI
11th Aug 2026833 AMAQI
11th Aug 2026744 AMAQI
11th Aug 2026705 AMAQI
24°C14/33°C
11th Aug 2026726 AMAQI
11th Aug 2026737 AMAQI
11th Aug 2026788 AMAQI
11th Aug 2026839 AMAQI
11th Aug 20268310 AMAQI
11th Aug 20269011 AMAQI
11th Aug 20269212 PMAQI
11th Aug 20261081 PMAQI
11th Aug 20261122 PMAQI
11th Aug 20261053 PMAQI
11th Aug 2026884 PMAQI
11th Aug 2026785 PMAQI
11th Aug 2026856 PMAQI
11th Aug 2026967 PMAQI
11th Aug 2026928 PMAQI
11th Aug 2026829 PMAQI
11th Aug 20269010 PMAQI
11th Aug 202611011 PMAQI
12th Aug 202611612 AMAQI
12th Aug 20261221 AMAQI
12th Aug 20261122 AMAQI
12th Aug 20261053 AMAQI
12th Aug 20261054 AMAQI
12th Aug 20261015 AMAQI
24°C15/32°C
12th Aug 2026886 AMAQI
12th Aug 2026847 AMAQI
12th Aug 2026798 AMAQI
12th Aug 2026789 AMAQI
12th Aug 20267010 AMAQI
12th Aug 20266811 AMAQI
12th Aug 20266212 PMAQI
12th Aug 2026631 PMAQI
12th Aug 2026622 PMAQI
12th Aug 2026623 PMAQI
12th Aug 2026634 PMAQI
12th Aug 2026555 PMAQI
12th Aug 2026586 PMAQI
12th Aug 2026577 PMAQI
12th Aug 2026538 PMAQI
12th Aug 2026669 PMAQI
12th Aug 20266610 PMAQI
12th Aug 20265811 PMAQI
13th Aug 20265112 AMAQI
13th Aug 2026461 AMAQI
13th Aug 2026462 AMAQI
13th Aug 2026563 AMAQI
13th Aug 2026534 AMAQI
13th Aug 2026535 AMAQI
21°C15/27°C
13th Aug 2026536 AMAQI
13th Aug 2026537 AMAQI
13th Aug 2026528 AMAQI
13th Aug 2026499 AMAQI
13th Aug 20264210 AMAQI
13th Aug 20264411 AMAQI
13th Aug 20264212 PMAQI
13th Aug 2026511 PMAQI
13th Aug 2026532 PMAQI
13th Aug 2026533 PMAQI
13th Aug 2026594 PMAQI
13th Aug 2026595 PMAQI
13th Aug 2026626 PMAQI
13th Aug 2026567 PMAQI
13th Aug 2026558 PMAQI
13th Aug 2026559 PMAQI
13th Aug 20265610 PMAQI
13th Aug 20265111 PMAQI
14th Aug 20265012 AMAQI
14th Aug 2026441 AMAQI
14th Aug 2026482 AMAQI
14th Aug 2026383 AMAQI
14th Aug 2026384 AMAQI
14th Aug 2026505 AMAQI
16°C14/22°C
14th Aug 2026386 AMAQI
14th Aug 2026527 AMAQI
14th Aug 2026388 AMAQI
14th Aug 2026389 AMAQI
14th Aug 20263810 AMAQI
14th Aug 20263311 AMAQI
14th Aug 20265012 PMAQI
14th Aug 2026401 PMAQI
14th Aug 2026442 PMAQI
14th Aug 2026463 PMAQI
14th Aug 2026464 PMAQI
14th Aug 2026465 PMAQI
14th Aug 2026336 PMAQI
14th Aug 2026387 PMAQI
14th Aug 2026468 PMAQI
14th Aug 2026489 PMAQI
14th Aug 20265210 PMAQI
14th Aug 20265011 PMAQI
15th Aug 20264812 AMAQI
15th Aug 2026511 AMAQI
15th Aug 2026482 AMAQI
15th Aug 2026463 AMAQI
15th Aug 2026524 AMAQI
15th Aug 2026495 AMAQI
16°C13/22°C
15th Aug 2026506 AMAQI
6 AM15th Aug 2026427 AMAQI
15th Aug 2026408 AMAQI
15th Aug 2026449 AMAQI
15th Aug 20265010 AMAQI
15th Aug 20265611 AMAQI
15th Aug 20264412 PMAQI
15th Aug 2026461 PMAQI
1 PM15th Aug 2026512 PMAQI
15th Aug 2026513 PMAQI
15th Aug 2026524 PMAQI
15th Aug 2026565 PMAQI
15th Aug 2026556 PMAQI
9 PM
1 AM
5 AM
17°C10/27°C
Day time
Avg. Highest Time
6 AM
70AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
8 AM
65AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 6 AM (Avg. 70), while the lowest AQI was between 8 AM to 8 AM (Avg. 65).
Night time
Avg. Highest Time
12 AM - 11 PM
70AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
70AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 70), while the lowest AQI was between 12 AM to 11 PM (Avg. 70).
2026 Days Vs Air Quality
Helena, Montana, United States
2026
87%
194
12%
26
1%
3
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Good
194 DaysModerate
26 DaysPoor
3 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2026, 87% of 227 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Helena, Montana, United States
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
52AQI (US)
52AQI (US)
2nd January 2026
27AQI (US)
27AQI (US)
3rd January 2026
30AQI (US)
30AQI (US)
4th January 2026
26AQI (US)
26AQI (US)
5th January 2026
30AQI (US)
30AQI (US)
6th January 2026
24AQI (US)
24AQI (US)
7th January 2026
24AQI (US)
24AQI (US)
8th January 2026
21AQI (US)
21AQI (US)
9th January 2026
27AQI (US)
27AQI (US)
10th January 2026
23AQI (US)
23AQI (US)
11th January 2026
39AQI (US)
39AQI (US)
12th January 2026
37AQI (US)
37AQI (US)
13th January 2026
29AQI (US)
29AQI (US)
14th January 2026
29AQI (US)
29AQI (US)
15th January 2026
28AQI (US)
28AQI (US)
16th January 2026
19AQI (US)
19AQI (US)
17th January 2026
21AQI (US)
21AQI (US)
18th January 2026
20AQI (US)
20AQI (US)
19th January 2026
29AQI (US)
29AQI (US)
20th January 2026
33AQI (US)
33AQI (US)
21st January 2026
34AQI (US)
34AQI (US)
22nd January 2026
40AQI (US)
40AQI (US)
23rd January 2026
39AQI (US)
39AQI (US)
24th January 2026
36AQI (US)
36AQI (US)
25th January 2026
36AQI (US)
36AQI (US)
26th January 2026
41AQI (US)
41AQI (US)
27th January 2026
56AQI (US)
56AQI (US)
28th January 2026
45AQI (US)
45AQI (US)
29th January 2026
35AQI (US)
35AQI (US)
30th January 2026
40AQI (US)
40AQI (US)
31st January 2026
27AQI (US)
27AQI (US)
1st February 2026
36AQI (US)
36AQI (US)
2nd February 2026
30AQI (US)
30AQI (US)
3rd February 2026
27AQI (US)
27AQI (US)
4th February 2026
36AQI (US)
36AQI (US)
5th February 2026
41AQI (US)
41AQI (US)
6th February 2026
32AQI (US)
32AQI (US)
7th February 2026
27AQI (US)
27AQI (US)
8th February 2026
35AQI (US)
35AQI (US)
9th February 2026
43AQI (US)
43AQI (US)
10th February 2026
26AQI (US)
26AQI (US)
11th February 2026
28AQI (US)
28AQI (US)
12th February 2026
25AQI (US)
25AQI (US)
13th February 2026
32AQI (US)
32AQI (US)
14th February 2026
33AQI (US)
33AQI (US)
15th February 2026
24AQI (US)
24AQI (US)
16th February 2026
31AQI (US)
31AQI (US)
17th February 2026
41AQI (US)
41AQI (US)
18th February 2026
31AQI (US)
31AQI (US)
19th February 2026
29AQI (US)
29AQI (US)
20th February 2026
29AQI (US)
29AQI (US)
21st February 2026
38AQI (US)
38AQI (US)
22nd February 2026
35AQI (US)
35AQI (US)
23rd February 2026
33AQI (US)
33AQI (US)
24th February 2026
49AQI (US)
49AQI (US)
25th February 2026
36AQI (US)
36AQI (US)
26th February 2026
27AQI (US)
27AQI (US)
27th February 2026
24AQI (US)
24AQI (US)
28th February 2026
29AQI (US)
29AQI (US)
1st March 2026
31AQI (US)
31AQI (US)
2nd March 2026
38AQI (US)
38AQI (US)
3rd March 2026
31AQI (US)
31AQI (US)
4th March 2026
38AQI (US)
38AQI (US)
5th March 2026
44AQI (US)
44AQI (US)
6th March 2026
30AQI (US)
30AQI (US)
7th March 2026
37AQI (US)
37AQI (US)
8th March 2026
34AQI (US)
34AQI (US)
9th March 2026
35AQI (US)
35AQI (US)
10th March 2026
26AQI (US)
26AQI (US)
11th March 2026
34AQI (US)
34AQI (US)
12th March 2026
41AQI (US)
41AQI (US)
13th March 2026
44AQI (US)
44AQI (US)
14th March 2026
33AQI (US)
33AQI (US)
15th March 2026
29AQI (US)
29AQI (US)
16th March 2026
24AQI (US)
24AQI (US)
17th March 2026
21AQI (US)
21AQI (US)
18th March 2026
35AQI (US)
35AQI (US)
19th March 2026
27AQI (US)
27AQI (US)
20th March 2026
34AQI (US)
34AQI (US)
21st March 2026
35AQI (US)
35AQI (US)
22nd March 2026
24AQI (US)
24AQI (US)
23rd March 2026
24AQI (US)
24AQI (US)
24th March 2026
30AQI (US)
30AQI (US)
25th March 2026
31AQI (US)
31AQI (US)
26th March 2026
32AQI (US)
32AQI (US)
27th March 2026
25AQI (US)
25AQI (US)
28th March 2026
26AQI (US)
26AQI (US)
29th March 2026
41AQI (US)
41AQI (US)
30th March 2026
33AQI (US)
33AQI (US)
31st March 2026
29AQI (US)
29AQI (US)
1st April 2026
32AQI (US)
32AQI (US)
2nd April 2026
31AQI (US)
31AQI (US)
3rd April 2026
27AQI (US)
27AQI (US)
4th April 2026
21AQI (US)
21AQI (US)
5th April 2026
23AQI (US)
23AQI (US)
6th April 2026
20AQI (US)
20AQI (US)
7th April 2026
26AQI (US)
26AQI (US)
8th April 2026
19AQI (US)
19AQI (US)
9th April 2026
23AQI (US)
23AQI (US)
10th April 2026
20AQI (US)
20AQI (US)
11th April 2026
20AQI (US)
20AQI (US)
12th April 2026
37AQI (US)
37AQI (US)
13th April 2026
39AQI (US)
39AQI (US)
14th April 2026
30AQI (US)
30AQI (US)
15th April 2026
35AQI (US)
35AQI (US)
16th April 2026
28AQI (US)
28AQI (US)
17th April 2026
18th April 2026
25AQI (US)
25AQI (US)
19th April 2026
22AQI (US)
22AQI (US)
20th April 2026
21AQI (US)
21AQI (US)
21st April 2026
24AQI (US)
24AQI (US)
22nd April 2026
23rd April 2026
24AQI (US)
24AQI (US)
24th April 2026
26AQI (US)
26AQI (US)
25th April 2026
32AQI (US)
32AQI (US)
26th April 2026
34AQI (US)
34AQI (US)
27th April 2026
30AQI (US)
30AQI (US)
28th April 2026
19AQI (US)
19AQI (US)
29th April 2026
22AQI (US)
22AQI (US)
30th April 2026
18AQI (US)
18AQI (US)
1st May 2026
20AQI (US)
20AQI (US)
2nd May 2026
16AQI (US)
16AQI (US)
3rd May 2026
16AQI (US)
16AQI (US)
4th May 2026
26AQI (US)
26AQI (US)
5th May 2026
25AQI (US)
25AQI (US)
6th May 2026
23AQI (US)
23AQI (US)
7th May 2026
17AQI (US)
17AQI (US)
8th May 2026
20AQI (US)
20AQI (US)
9th May 2026
10th May 2026
18AQI (US)
18AQI (US)
11th May 2026
20AQI (US)
20AQI (US)
12th May 2026
18AQI (US)
18AQI (US)
13th May 2026
35AQI (US)
35AQI (US)
14th May 2026
19AQI (US)
19AQI (US)
15th May 2026
23AQI (US)
23AQI (US)
16th May 2026
28AQI (US)
28AQI (US)
17th May 2026
35AQI (US)
35AQI (US)
18th May 2026
32AQI (US)
32AQI (US)
19th May 2026
29AQI (US)
29AQI (US)
20th May 2026
25AQI (US)
25AQI (US)
21st May 2026
31AQI (US)
31AQI (US)
22nd May 2026
28AQI (US)
28AQI (US)
23rd May 2026
26AQI (US)
26AQI (US)
24th May 2026
24AQI (US)
24AQI (US)
25th May 2026
20AQI (US)
20AQI (US)
26th May 2026
17AQI (US)
17AQI (US)
27th May 2026
29AQI (US)
29AQI (US)
28th May 2026
44AQI (US)
44AQI (US)
29th May 2026
26AQI (US)
26AQI (US)
30th May 2026
30AQI (US)
30AQI (US)
31st May 2026
29AQI (US)
29AQI (US)
1st June 2026
25AQI (US)
25AQI (US)
2nd June 2026
21AQI (US)
21AQI (US)
3rd June 2026
26AQI (US)
26AQI (US)
4th June 2026
30AQI (US)
30AQI (US)
5th June 2026
21AQI (US)
21AQI (US)
6th June 2026
17AQI (US)
17AQI (US)
7th June 2026
14AQI (US)
14AQI (US)
8th June 2026
24AQI (US)
24AQI (US)
9th June 2026
19AQI (US)
19AQI (US)
10th June 2026
18AQI (US)
18AQI (US)
11th June 2026
17AQI (US)
17AQI (US)
12th June 2026
20AQI (US)
20AQI (US)
13th June 2026
24AQI (US)
24AQI (US)
14th June 2026
19AQI (US)
19AQI (US)
15th June 2026
21AQI (US)
21AQI (US)
16th June 2026
32AQI (US)
32AQI (US)
17th June 2026
26AQI (US)
26AQI (US)
18th June 2026
17AQI (US)
17AQI (US)
19th June 2026
18AQI (US)
18AQI (US)
20th June 2026
20AQI (US)
20AQI (US)
21st June 2026
15AQI (US)
15AQI (US)
22nd June 2026
19AQI (US)
19AQI (US)
23rd June 2026
24AQI (US)
24AQI (US)
24th June 2026
20AQI (US)
20AQI (US)
25th June 2026
18AQI (US)
18AQI (US)
26th June 2026
16AQI (US)
16AQI (US)
27th June 2026
16AQI (US)
16AQI (US)
28th June 2026
22AQI (US)
22AQI (US)
29th June 2026
51AQI (US)
51AQI (US)
30th June 2026
106AQI (US)
106AQI (US)
1st July 2026
34AQI (US)
34AQI (US)
2nd July 2026
21AQI (US)
21AQI (US)
3rd July 2026
19AQI (US)
19AQI (US)
4th July 2026
29AQI (US)
29AQI (US)
5th July 2026
34AQI (US)
34AQI (US)
6th July 2026
17AQI (US)
17AQI (US)
7th July 2026
18AQI (US)
18AQI (US)
8th July 2026
28AQI (US)
28AQI (US)
9th July 2026
38AQI (US)
38AQI (US)
10th July 2026
29AQI (US)
29AQI (US)
11th July 2026
17AQI (US)
17AQI (US)
12th July 2026
27AQI (US)
27AQI (US)
13th July 2026
31AQI (US)
31AQI (US)
14th July 2026
32AQI (US)
32AQI (US)
15th July 2026
38AQI (US)
38AQI (US)
16th July 2026
40AQI (US)
40AQI (US)
17th July 2026
45AQI (US)
45AQI (US)
18th July 2026
54AQI (US)
54AQI (US)
19th July 2026
55AQI (US)
55AQI (US)
20th July 2026
48AQI (US)
48AQI (US)
21st July 2026
51AQI (US)
51AQI (US)
22nd July 2026
50AQI (US)
50AQI (US)
23rd July 2026
53AQI (US)
53AQI (US)
24th July 2026
53AQI (US)
53AQI (US)
25th July 2026
54AQI (US)
54AQI (US)
26th July 2026
73AQI (US)
73AQI (US)
27th July 2026
111AQI (US)
111AQI (US)
28th July 2026
92AQI (US)
92AQI (US)
29th July 2026
81AQI (US)
81AQI (US)
30th July 2026
62AQI (US)
62AQI (US)
31st July 2026
59AQI (US)
59AQI (US)
1st August 2026
64AQI (US)
64AQI (US)
2nd August 2026
74AQI (US)
74AQI (US)
3rd August 2026
82AQI (US)
82AQI (US)
4th August 2026
55AQI (US)
55AQI (US)
5th August 2026
60AQI (US)
60AQI (US)
6th August 2026
103AQI (US)
103AQI (US)
7th August 2026
99AQI (US)
99AQI (US)
8th August 2026
90AQI (US)
90AQI (US)
9th August 2026
84AQI (US)
84AQI (US)
10th August 2026
95AQI (US)
95AQI (US)
11th August 2026
87AQI (US)
87AQI (US)
12th August 2026
77AQI (US)
77AQI (US)
13th August 2026
52AQI (US)
52AQI (US)
14th August 2026
44AQI (US)
44AQI (US)
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
32AQI (US)
32AQI (US)
32AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
45AQI (US)
76AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202634AQI (US)
29
2
28
31
28
30
28
1
1
19
11
1
1
12
1
194
26
3
Highest AQI (US) recorded in
August76AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202529AQI (US)
5
1
30
31
30
31
31
25
5
31
30
31
275
6
Highest AQI (US) recorded in
September38AQI (US)
Lowest AQI (US) recorded in
October20AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Most Polluted Year Recorded
2026(Avg.)
34AQI (US)Least Polluted Year Recorded
2025(Avg.)
29AQI (US)Helena's annual 2026 AQI (US) (34) shows an average percentage change of 17.2% (worsened AQI (US)) compared to previous years: 2025 (29).
