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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Great Falls, 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

Great Falls, Montana, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
10th Aug 2026
112AQI
Lowest AQI recorded on
17th Aug 2025
27AQI

Same Day Analysis (13th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 52 of Moderate air quality, showing improvement over 2024 on the same day.

Day & Night AQI Trend: 13th Aug - 14th Aug 2026

Great Falls, Montana, United States

AQI
Day
Night
.

6 AM13th Aug 2026

9 PM

5 AM14th Aug 2026

Day time
Avg. Highest Time
8PM13th Aug

62AQI

Avg. Lowest Time
3PM13th Aug

40AQI

Night time
Avg. Highest Time
5AM14th Aug

56AQI

Avg. Lowest Time
1AM14th Aug

40AQI

In the last 24 hours,

Great Falls's AQI reached its highest point of 62 at 8 PM during the Day, while the lowest point, 40, was recorded at 1 AM during the Night between 13th Aug and 14th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Great Falls, Montana, United States

JulAug
16th - 17th17th - 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
Day
Night
16th Jul 2026446 AMAQI
16th Jul 2026447 AMAQI
16th Jul 2026448 AMAQI
16th Jul 2026469 AMAQI
16th Jul 20264710 AMAQI
16th Jul 20264411 AMAQI
16th Jul 20265112 PMAQI
16th Jul 2026541 PMAQI
16th Jul 2026482 PMAQI
16th Jul 2026463 PMAQI
16th Jul 2026424 PMAQI
16th Jul 2026425 PMAQI
16th Jul 2026366 PMAQI
16th Jul 2026367 PMAQI
16th Jul 2026428 PMAQI
16th Jul 2026389 PMAQI
16th Jul 20263810 PMAQI
16th Jul 20264811 PMAQI
17th Jul 20264712 AMAQI
17th Jul 2026481 AMAQI
17th Jul 2026462 AMAQI
17th Jul 2026463 AMAQI
17th Jul 2026464 AMAQI
17th Jul 2026525 AMAQI

26°C16/36°C

17th Jul 2026446 AMAQI
17th Jul 2026427 AMAQI
17th Jul 2026488 AMAQI
17th Jul 2026629 AMAQI
17th Jul 20265410 AMAQI
17th Jul 20265511 AMAQI
17th Jul 20265212 PMAQI
17th Jul 2026501 PMAQI
17th Jul 2026442 PMAQI
17th Jul 2026473 PMAQI
17th Jul 2026464 PMAQI
17th Jul 2026505 PMAQI
17th Jul 2026466 PMAQI
17th Jul 2026477 PMAQI
17th Jul 2026548 PMAQI
17th Jul 2026529 PMAQI
17th Jul 20265410 PMAQI
17th Jul 20265011 PMAQI
18th Jul 20264812 AMAQI
18th Jul 2026601 AMAQI
18th Jul 2026492 AMAQI
18th Jul 2026253 AMAQI
18th Jul 2026404 AMAQI
18th Jul 2026315 AMAQI

26°C19/36°C

18th Jul 2026296 AMAQI
18th Jul 2026537 AMAQI
18th Jul 2026548 AMAQI
18th Jul 2026509 AMAQI
18th Jul 20264810 AMAQI
18th Jul 20265211 AMAQI
18th Jul 20265612 PMAQI
18th Jul 2026521 PMAQI
18th Jul 2026602 PMAQI
18th Jul 2026533 PMAQI
18th Jul 2026514 PMAQI
18th Jul 2026445 PMAQI
18th Jul 2026446 PMAQI
18th Jul 2026447 PMAQI
18th Jul 2026468 PMAQI
18th Jul 2026599 PMAQI
18th Jul 20265710 PMAQI
18th Jul 20265611 PMAQI
19th Jul 20265612 AMAQI
19th Jul 2026571 AMAQI
19th Jul 2026502 AMAQI
19th Jul 2026423 AMAQI
19th Jul 2026534 AMAQI
19th Jul 2026505 AMAQI

26°C17/37°C

19th Jul 2026546 AMAQI
19th Jul 2026607 AMAQI
19th Jul 2026608 AMAQI
19th Jul 2026529 AMAQI
19th Jul 20265510 AMAQI
19th Jul 20265711 AMAQI
19th Jul 20265812 PMAQI
19th Jul 2026641 PMAQI
19th Jul 2026692 PMAQI
19th Jul 2026773 PMAQI
19th Jul 2026704 PMAQI
19th Jul 2026695 PMAQI
19th Jul 2026726 PMAQI
19th Jul 2026697 PMAQI
19th Jul 2026638 PMAQI
19th Jul 2026629 PMAQI
19th Jul 20266210 PMAQI
19th Jul 20267011 PMAQI
20th Jul 20266612 AMAQI
20th Jul 2026621 AMAQI
20th Jul 2026642 AMAQI
20th Jul 2026543 AMAQI
20th Jul 2026534 AMAQI
20th Jul 2026485 AMAQI

26°C18/34°C

20th Jul 2026526 AMAQI
20th Jul 2026497 AMAQI
20th Jul 2026508 AMAQI
20th Jul 2026509 AMAQI
20th Jul 20265410 AMAQI
20th Jul 20265411 AMAQI
20th Jul 20265212 PMAQI
20th Jul 2026551 PMAQI
20th Jul 2026522 PMAQI
20th Jul 2026483 PMAQI
20th Jul 2026504 PMAQI
20th Jul 2026465 PMAQI
20th Jul 2026446 PMAQI
20th Jul 2026547 PMAQI
20th Jul 2026468 PMAQI
20th Jul 20264410 PMAQI
20th Jul 20264611 PMAQI
21st Jul 20264412 AMAQI
21st Jul 2026501 AMAQI
21st Jul 2026532 AMAQI
21st Jul 2026483 AMAQI
21st Jul 2026524 AMAQI
21st Jul 2026485 AMAQI

23°C13/31°C

21st Jul 2026536 AMAQI
21st Jul 2026507 AMAQI
21st Jul 2026508 AMAQI
21st Jul 2026509 AMAQI
21st Jul 20264410 AMAQI
21st Jul 20264211 AMAQI
21st Jul 20264012 PMAQI
21st Jul 2026501 PMAQI
21st Jul 2026702 PMAQI
21st Jul 2026663 PMAQI
21st Jul 2026664 PMAQI
21st Jul 2026685 PMAQI
21st Jul 2026686 PMAQI
21st Jul 2026647 PMAQI
21st Jul 2026508 PMAQI
21st Jul 2026429 PMAQI
21st Jul 20264510 PMAQI
21st Jul 20265211 PMAQI
22nd Jul 20265312 AMAQI
22nd Jul 2026501 AMAQI
22nd Jul 2026522 AMAQI
22nd Jul 2026513 AMAQI
22nd Jul 2026554 AMAQI
22nd Jul 2026535 AMAQI

24°C18/32°C

22nd Jul 2026466 AMAQI
22nd Jul 2026487 AMAQI
22nd Jul 2026488 AMAQI
22nd Jul 2026529 AMAQI
22nd Jul 20265510 AMAQI
22nd Jul 20265511 AMAQI
22nd Jul 20266912 PMAQI
22nd Jul 2026801 PMAQI
22nd Jul 2026862 PMAQI
22nd Jul 2026763 PMAQI
22nd Jul 2026704 PMAQI
22nd Jul 2026745 PMAQI
22nd Jul 2026726 PMAQI
22nd Jul 2026727 PMAQI
22nd Jul 2026748 PMAQI
22nd Jul 2026689 PMAQI
22nd Jul 20266610 PMAQI
22nd Jul 20265411 PMAQI
23rd Jul 20264412 AMAQI
23rd Jul 2026421 AMAQI
23rd Jul 2026442 AMAQI
23rd Jul 2026503 AMAQI
23rd Jul 2026704 AMAQI
23rd Jul 2026565 AMAQI

26°C16/34°C

23rd Jul 2026736 AMAQI
23rd Jul 2026737 AMAQI
23rd Jul 2026468 AMAQI
23rd Jul 2026609 AMAQI
23rd Jul 20266410 AMAQI
23rd Jul 20267211 AMAQI
23rd Jul 20269812 PMAQI
23rd Jul 2026861 PMAQI
23rd Jul 2026802 PMAQI
23rd Jul 2026763 PMAQI
23rd Jul 2026794 PMAQI
23rd Jul 2026815 PMAQI
23rd Jul 2026786 PMAQI
23rd Jul 2026727 PMAQI
23rd Jul 2026688 PMAQI
23rd Jul 2026769 PMAQI
23rd Jul 20267610 PMAQI
23rd Jul 20266611 PMAQI
24th Jul 20266612 AMAQI
24th Jul 2026661 AMAQI
24th Jul 2026622 AMAQI
24th Jul 2026643 AMAQI
24th Jul 2026624 AMAQI
24th Jul 2026555 AMAQI

28°C18/36°C

24th Jul 2026526 AMAQI
24th Jul 2026447 AMAQI
24th Jul 2026668 AMAQI
24th Jul 2026559 AMAQI
24th Jul 20265810 AMAQI
24th Jul 20266011 AMAQI
24th Jul 20268612 PMAQI
24th Jul 2026951 PMAQI
24th Jul 2026882 PMAQI
24th Jul 2026823 PMAQI
24th Jul 2026844 PMAQI
24th Jul 2026825 PMAQI
24th Jul 2026786 PMAQI
24th Jul 2026707 PMAQI
24th Jul 2026648 PMAQI
24th Jul 2026599 PMAQI
24th Jul 20265810 PMAQI
24th Jul 20265811 PMAQI
25th Jul 20265712 AMAQI
25th Jul 2026601 AMAQI
25th Jul 2026562 AMAQI
25th Jul 2026483 AMAQI
25th Jul 2026624 AMAQI
25th Jul 2026645 AMAQI

29°C20/36°C

25th Jul 2026536 AMAQI
25th Jul 2026577 AMAQI
25th Jul 2026628 AMAQI
25th Jul 2026679 AMAQI
25th Jul 20266610 AMAQI
25th Jul 20267511 AMAQI
25th Jul 20268012 PMAQI
25th Jul 2026821 PMAQI
25th Jul 2026802 PMAQI
25th Jul 2026723 PMAQI
25th Jul 2026664 PMAQI
25th Jul 2026595 PMAQI
25th Jul 2026536 PMAQI
25th Jul 2026517 PMAQI
25th Jul 2026448 PMAQI
25th Jul 2026689 PMAQI
25th Jul 20267210 PMAQI
25th Jul 20267411 PMAQI
26th Jul 20267212 AMAQI
26th Jul 2026701 AMAQI
26th Jul 2026822 AMAQI
26th Jul 2026893 AMAQI
26th Jul 2026824 AMAQI
26th Jul 2026785 AMAQI

29°C17/40°C

26th Jul 2026726 AMAQI
26th Jul 2026557 AMAQI
26th Jul 2026518 AMAQI
26th Jul 2026529 AMAQI
26th Jul 20266810 AMAQI
26th Jul 20267711 AMAQI
26th Jul 20269812 PMAQI
26th Jul 20261081 PMAQI
26th Jul 20261182 PMAQI
26th Jul 20261143 PMAQI
26th Jul 20261094 PMAQI
26th Jul 20261215 PMAQI
26th Jul 20261136 PMAQI
26th Jul 20261127 PMAQI
26th Jul 20261168 PMAQI
26th Jul 20261149 PMAQI
26th Jul 202610410 PMAQI
26th Jul 202612811 PMAQI
27th Jul 202612712 AMAQI
27th Jul 20261261 AMAQI
27th Jul 20261222 AMAQI
27th Jul 20261203 AMAQI
27th Jul 2026884 AMAQI
27th Jul 2026855 AMAQI

28°C17/36°C

27th Jul 20261066 AMAQI
27th Jul 20261107 AMAQI
27th Jul 20261188 AMAQI
27th Jul 20261259 AMAQI
27th Jul 202612910 AMAQI
27th Jul 202612811 AMAQI
27th Jul 202615012 PMAQI
27th Jul 20261391 PMAQI
27th Jul 20261432 PMAQI
27th Jul 20261403 PMAQI
27th Jul 20261344 PMAQI
27th Jul 20261445 PMAQI
27th Jul 20261356 PMAQI
27th Jul 20261287 PMAQI
27th Jul 20261228 PMAQI
27th Jul 20261109 PMAQI
27th Jul 202610110 PMAQI
27th Jul 202610111 PMAQI
28th Jul 20268512 AMAQI
28th Jul 2026801 AMAQI
28th Jul 2026852 AMAQI
28th Jul 2026623 AMAQI
28th Jul 2026544 AMAQI
28th Jul 2026825 AMAQI

26°C15/34°C

28th Jul 2026846 AMAQI
28th Jul 2026787 AMAQI
28th Jul 2026848 AMAQI
28th Jul 2026919 AMAQI
28th Jul 20269510 AMAQI
28th Jul 202610211 AMAQI
28th Jul 202610712 PMAQI
28th Jul 20261081 PMAQI
28th Jul 20261162 PMAQI
28th Jul 20261123 PMAQI
28th Jul 20261104 PMAQI
28th Jul 20261005 PMAQI
28th Jul 2026986 PMAQI
28th Jul 2026817 PMAQI
28th Jul 2026778 PMAQI
28th Jul 2026649 PMAQI
28th Jul 20266610 PMAQI
28th Jul 20267011 PMAQI
29th Jul 20267212 AMAQI
29th Jul 2026761 AMAQI
29th Jul 2026722 AMAQI
29th Jul 2026743 AMAQI
29th Jul 2026764 AMAQI
29th Jul 2026765 AMAQI

26°C16/36°C

29th Jul 2026846 AMAQI
29th Jul 2026777 AMAQI
29th Jul 2026848 AMAQI
29th Jul 2026869 AMAQI
29th Jul 202610210 AMAQI
29th Jul 202610211 AMAQI
29th Jul 202612012 PMAQI
29th Jul 20261181 PMAQI
29th Jul 20261042 PMAQI
29th Jul 2026983 PMAQI
29th Jul 2026964 PMAQI
29th Jul 2026935 PMAQI
29th Jul 2026856 PMAQI
29th Jul 2026887 PMAQI
29th Jul 2026968 PMAQI
29th Jul 2026869 PMAQI
29th Jul 20268810 PMAQI
29th Jul 20267411 PMAQI
30th Jul 20266812 AMAQI
30th Jul 2026681 AMAQI
30th Jul 2026662 AMAQI
30th Jul 2026683 AMAQI
30th Jul 2026594 AMAQI
30th Jul 2026465 AMAQI

26°C14/35°C

30th Jul 2026586 AMAQI
30th Jul 2026727 AMAQI
30th Jul 2026778 AMAQI
30th Jul 2026689 AMAQI
30th Jul 20267810 AMAQI
30th Jul 20268511 AMAQI
30th Jul 202610512 PMAQI
30th Jul 2026941 PMAQI
30th Jul 2026952 PMAQI
30th Jul 2026923 PMAQI
30th Jul 2026884 PMAQI
30th Jul 2026795 PMAQI
30th Jul 2026806 PMAQI
30th Jul 2026697 PMAQI
30th Jul 2026628 PMAQI
30th Jul 2026629 PMAQI
30th Jul 20266310 PMAQI
30th Jul 20265511 PMAQI
31st Jul 20266312 AMAQI
31st Jul 2026681 AMAQI
31st Jul 2026602 AMAQI
31st Jul 2026533 AMAQI
31st Jul 2026464 AMAQI
31st Jul 2026655 AMAQI

26°C16/36°C

31st Jul 2026626 AMAQI
31st Jul 2026657 AMAQI
31st Jul 2026578 AMAQI
31st Jul 2026529 AMAQI
31st Jul 20265510 AMAQI
31st Jul 20265911 AMAQI
31st Jul 202610012 PMAQI
31st Jul 20261001 PMAQI
31st Jul 2026942 PMAQI
31st Jul 20261003 PMAQI
31st Jul 2026984 PMAQI
31st Jul 20261035 PMAQI
31st Jul 2026926 PMAQI
31st Jul 2026717 PMAQI
31st Jul 2026628 PMAQI
31st Jul 2026889 PMAQI
31st Jul 20269610 PMAQI
31st Jul 20267011 PMAQI
1st Aug 20267012 AMAQI
1st Aug 2026671 AMAQI
1st Aug 2026802 AMAQI
1st Aug 2026883 AMAQI
1st Aug 2026804 AMAQI
1st Aug 2026505 AMAQI

29°C19/37°C

1st Aug 2026646 AMAQI
1st Aug 2026767 AMAQI
1st Aug 2026838 AMAQI
1st Aug 2026949 AMAQI
1st Aug 202610910 AMAQI
1st Aug 202611611 AMAQI
1st Aug 202611112 PMAQI
1st Aug 20261011 PMAQI
1st Aug 2026942 PMAQI
1st Aug 2026883 PMAQI
1st Aug 2026924 PMAQI
1st Aug 2026925 PMAQI
1st Aug 2026926 PMAQI
1st Aug 2026867 PMAQI
1st Aug 2026808 PMAQI
1st Aug 2026759 PMAQI
1st Aug 20266810 PMAQI
1st Aug 20266611 PMAQI
2nd Aug 20266412 AMAQI
2nd Aug 2026681 AMAQI
2nd Aug 2026672 AMAQI
2nd Aug 2026743 AMAQI
2nd Aug 2026804 AMAQI
2nd Aug 2026795 AMAQI

28°C15/40°C

2nd Aug 2026646 AMAQI
2nd Aug 2026557 AMAQI
2nd Aug 2026698 AMAQI
2nd Aug 2026889 AMAQI
2nd Aug 20269310 AMAQI
2nd Aug 202612111 AMAQI
2nd Aug 202612212 PMAQI
2nd Aug 20261191 PMAQI
2nd Aug 20261462 PMAQI
2nd Aug 20261103 PMAQI
2nd Aug 2026974 PMAQI
2nd Aug 2026815 PMAQI
2nd Aug 2026706 PMAQI
2nd Aug 2026607 PMAQI
2nd Aug 2026518 PMAQI
2nd Aug 2026929 PMAQI
2nd Aug 20267810 PMAQI
2nd Aug 20268211 PMAQI
3rd Aug 20269412 AMAQI
3rd Aug 20261201 AMAQI
3rd Aug 20261512 AMAQI
3rd Aug 20261503 AMAQI
3rd Aug 20261364 AMAQI
3rd Aug 20261225 AMAQI

24°C18/31°C

3rd Aug 2026746 AMAQI
3rd Aug 2026627 AMAQI
3rd Aug 2026588 AMAQI
3rd Aug 2026769 AMAQI
3rd Aug 20268410 AMAQI
3rd Aug 202611311 AMAQI
3rd Aug 20269412 PMAQI
3rd Aug 2026851 PMAQI
3rd Aug 2026882 PMAQI
3rd Aug 2026573 PMAQI
3rd Aug 2026634 PMAQI
3rd Aug 2026605 PMAQI
3rd Aug 2026526 PMAQI
3rd Aug 2026567 PMAQI
3rd Aug 2026448 PMAQI
3rd Aug 2026429 PMAQI
3rd Aug 20264410 PMAQI
3rd Aug 20264211 PMAQI
4th Aug 20264012 AMAQI
4th Aug 2026401 AMAQI
4th Aug 2026442 AMAQI
4th Aug 2026563 AMAQI
4th Aug 2026524 AMAQI
4th Aug 2026525 AMAQI

16°C10/23°C

4th Aug 2026556 AMAQI
4th Aug 2026537 AMAQI
4th Aug 2026528 AMAQI
4th Aug 2026569 AMAQI
4th Aug 20266010 AMAQI
4th Aug 20266611 AMAQI
4th Aug 20266712 PMAQI
4th Aug 2026611 PMAQI
4th Aug 2026602 PMAQI
4th Aug 2026583 PMAQI
4th Aug 2026524 PMAQI
4th Aug 2026545 PMAQI
4th Aug 2026546 PMAQI
4th Aug 2026507 PMAQI
4th Aug 2026468 PMAQI
4th Aug 2026429 PMAQI
4th Aug 20265010 PMAQI
4th Aug 20266411 PMAQI
5th Aug 20266312 AMAQI
5th Aug 2026531 AMAQI
5th Aug 2026542 AMAQI
5th Aug 2026563 AMAQI
5th Aug 2026564 AMAQI
5th Aug 2026545 AMAQI

18°C7/28°C

5th Aug 2026526 AMAQI
5th Aug 2026577 AMAQI
5th Aug 2026538 AMAQI
5th Aug 2026589 AMAQI
5th Aug 20266310 AMAQI
5th Aug 20266411 AMAQI
5th Aug 20267212 PMAQI
5th Aug 2026961 PMAQI
5th Aug 2026962 PMAQI
5th Aug 2026783 PMAQI
5th Aug 2026684 PMAQI
5th Aug 2026655 PMAQI
5th Aug 2026646 PMAQI
5th Aug 2026547 PMAQI
5th Aug 2026578 PMAQI
5th Aug 2026549 PMAQI
5th Aug 20265410 PMAQI
5th Aug 20265111 PMAQI
6th Aug 20265912 AMAQI
6th Aug 2026881 AMAQI
6th Aug 2026852 AMAQI
6th Aug 2026403 AMAQI
6th Aug 2026514 AMAQI
6th Aug 2026595 AMAQI

21°C8/30°C

6th Aug 2026686 AMAQI
6th Aug 2026707 AMAQI
6th Aug 2026828 AMAQI
6th Aug 2026889 AMAQI
6th Aug 202610610 AMAQI
6th Aug 202610111 AMAQI
6th Aug 202612012 PMAQI
6th Aug 20261521 PMAQI
6th Aug 20261292 PMAQI
6th Aug 20261113 PMAQI
6th Aug 2026904 PMAQI
6th Aug 2026805 PMAQI
6th Aug 2026806 PMAQI
6th Aug 2026807 PMAQI
6th Aug 2026808 PMAQI
6th Aug 2026749 PMAQI
6th Aug 20266710 PMAQI
6th Aug 20265911 PMAQI
7th Aug 20265212 AMAQI
7th Aug 2026501 AMAQI
7th Aug 2026682 AMAQI
7th Aug 2026823 AMAQI
7th Aug 2026804 AMAQI
7th Aug 2026805 AMAQI

22°C10/30°C

7th Aug 2026896 AMAQI
7th Aug 2026777 AMAQI
7th Aug 2026448 AMAQI
7th Aug 2026429 AMAQI
7th Aug 20265410 AMAQI
7th Aug 20265611 AMAQI
7th Aug 20265712 PMAQI
7th Aug 2026621 PMAQI
7th Aug 2026982 PMAQI
7th Aug 2026863 PMAQI
7th Aug 2026944 PMAQI
7th Aug 20261095 PMAQI
7th Aug 20261106 PMAQI
7th Aug 2026917 PMAQI
7th Aug 2026888 PMAQI
7th Aug 2026969 PMAQI
7th Aug 20269210 PMAQI
7th Aug 20269611 PMAQI
8th Aug 202610012 AMAQI
8th Aug 2026821 AMAQI
8th Aug 2026602 AMAQI
8th Aug 2026683 AMAQI
8th Aug 2026784 AMAQI
8th Aug 2026965 AMAQI

23°C11/34°C

8th Aug 2026986 AMAQI
8th Aug 2026967 AMAQI
8th Aug 20261118 AMAQI
8th Aug 20261059 AMAQI
8th Aug 202611810 AMAQI
8th Aug 202610911 AMAQI
8th Aug 202612812 PMAQI
8th Aug 20261461 PMAQI
8th Aug 20261442 PMAQI
8th Aug 20261373 PMAQI
8th Aug 20261274 PMAQI
8th Aug 20261235 PMAQI
8th Aug 20261206 PMAQI
8th Aug 20261207 PMAQI
8th Aug 20261158 PMAQI
8th Aug 20261169 PMAQI
8th Aug 202610710 PMAQI
8th Aug 20269011 PMAQI
9th Aug 20268212 AMAQI
9th Aug 2026881 AMAQI
9th Aug 2026862 AMAQI
9th Aug 2026563 AMAQI
9th Aug 2026644 AMAQI
9th Aug 2026805 AMAQI

24°C13/33°C

9th Aug 2026866 AMAQI
9th Aug 2026967 AMAQI
9th Aug 2026978 AMAQI
9th Aug 2026939 AMAQI
9th Aug 202610410 AMAQI
9th Aug 20269511 AMAQI
9th Aug 20268912 PMAQI
9th Aug 2026841 PMAQI
9th Aug 20261272 PMAQI
9th Aug 20261283 PMAQI
9th Aug 20261344 PMAQI
9th Aug 20261435 PMAQI
9th Aug 20261336 PMAQI
9th Aug 20261287 PMAQI
9th Aug 20261148 PMAQI
9th Aug 20261149 PMAQI
9th Aug 202611010 PMAQI
9th Aug 202610311 PMAQI
10th Aug 202610812 AMAQI
10th Aug 2026871 AMAQI
10th Aug 2026702 AMAQI
10th Aug 2026863 AMAQI
10th Aug 20261014 AMAQI
10th Aug 20261005 AMAQI

22°C13/30°C

10th Aug 20261026 AMAQI
10th Aug 20261037 AMAQI
10th Aug 20261128 AMAQI
10th Aug 20261029 AMAQI
10th Aug 202611010 AMAQI
10th Aug 202610511 AMAQI
10th Aug 202611412 PMAQI
10th Aug 20261341 PMAQI
10th Aug 20261522 PMAQI
10th Aug 20261423 PMAQI
10th Aug 20261304 PMAQI
10th Aug 20261375 PMAQI
10th Aug 20261126 PMAQI
10th Aug 20261207 PMAQI
10th Aug 20261208 PMAQI
10th Aug 20261169 PMAQI
10th Aug 202611610 PMAQI
10th Aug 202612011 PMAQI
11th Aug 202612212 AMAQI
11th Aug 20261071 AMAQI
11th Aug 20261082 AMAQI
11th Aug 2026663 AMAQI
11th Aug 2026864 AMAQI
11th Aug 2026955 AMAQI

23°C12/33°C

11th Aug 20261056 AMAQI
11th Aug 20261087 AMAQI
11th Aug 20261068 AMAQI
11th Aug 20261139 AMAQI
11th Aug 202610010 AMAQI
11th Aug 20269611 AMAQI
11th Aug 20269412 PMAQI
11th Aug 20261141 PMAQI
11th Aug 20261372 PMAQI
11th Aug 20261183 PMAQI
11th Aug 20261144 PMAQI
11th Aug 2026985 PMAQI
11th Aug 2026986 PMAQI
11th Aug 2026887 PMAQI
11th Aug 2026758 PMAQI
11th Aug 2026709 PMAQI
11th Aug 20267010 PMAQI
11th Aug 20267111 PMAQI
12th Aug 20267312 AMAQI
12th Aug 2026841 AMAQI
12th Aug 2026642 AMAQI
12th Aug 2026563 AMAQI
12th Aug 2026704 AMAQI
12th Aug 2026825 AMAQI

23°C14/31°C

12th Aug 2026846 AMAQI
12th Aug 2026767 AMAQI
12th Aug 2026748 AMAQI
12th Aug 2026689 AMAQI
12th Aug 20266810 AMAQI
12th Aug 20266511 AMAQI
12th Aug 20266612 PMAQI
12th Aug 2026681 PMAQI
12th Aug 2026952 PMAQI
12th Aug 2026883 PMAQI
12th Aug 2026784 PMAQI
12th Aug 2026815 PMAQI
12th Aug 2026916 PMAQI
12th Aug 2026847 PMAQI
12th Aug 2026648 PMAQI
12th Aug 2026649 PMAQI
12th Aug 20266010 PMAQI
12th Aug 20265411 PMAQI
13th Aug 20265312 AMAQI
13th Aug 2026421 AMAQI
13th Aug 2026462 AMAQI
13th Aug 2026483 AMAQI
13th Aug 2026484 AMAQI
13th Aug 2026485 AMAQI

20°C13/27°C

13th Aug 2026486 AMAQI
13th Aug 2026467 AMAQI
13th Aug 2026448 AMAQI
13th Aug 2026549 AMAQI
13th Aug 20265610 AMAQI
13th Aug 20265611 AMAQI
13th Aug 20265712 PMAQI
13th Aug 2026581 PMAQI
13th Aug 2026512 PMAQI
13th Aug 2026403 PMAQI
13th Aug 2026574 PMAQI
13th Aug 2026565 PMAQI
13th Aug 2026586 PMAQI
13th Aug 2026517 PMAQI
13th Aug 2026628 PMAQI
13th Aug 2026539 PMAQI
13th Aug 20265310 PMAQI
13th Aug 20265411 PMAQI
14th Aug 20265012 AMAQI
14th Aug 2026401 AMAQI
14th Aug 2026422 AMAQI
14th Aug 2026433 AMAQI
14th Aug 2026464 AMAQI
14th Aug 2026565 AMAQI

15°C13/17°C

14th Aug 2026526 AMAQI
6 AM
14th Aug 2026557 AMAQI
14th Aug 2026518 AMAQI
14th Aug 2026469 AMAQI
14th Aug 20264210 AMAQI
14th Aug 20265011 AMAQI
14th Aug 20264412 PMAQI
14th Aug 2026461 PMAQI
1 PM
14th Aug 2026442 PMAQI
14th Aug 2026483 PMAQI
14th Aug 2026464 PMAQI
14th Aug 2026485 PMAQI
14th Aug 2026466 PMAQI
9 PM
1 AM
5 AM

15°C14/16°C

Day time
Avg. Highest Time
2 PM

94AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
6 AM - 9 AM

68AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 2 PM (Avg. 94), while the lowest AQI was between 6 AM to 9 AM (Avg. 68).
Night time
Avg. Highest Time
10 PM - 11 PM

71AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
3 AM

64AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 PM to 11 PM (Avg. 71), while the lowest AQI was between 3 AM to 3 AM (Avg. 64).

2026 Days Vs Air Quality

Great Falls, Montana, United States

2026

84%

187

14%

31

2%

4

Total number of days with different AQI categories in last 226 days in 2026 (139 days remaining)

Good
187 Days
Moderate
31 Days
Poor
4 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 84%

Health Risk Level:

Low

In 2026, 84% of 226 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

Great Falls, 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
34AQI (US)
2nd January 2026
22AQI (US)
3rd January 2026
17AQI (US)
4th January 2026
20AQI (US)
5th January 2026
35AQI (US)
6th January 2026
24AQI (US)
7th January 2026
15AQI (US)
8th January 2026
16AQI (US)
9th January 2026
24AQI (US)
10th January 2026
19AQI (US)
11th January 2026
16AQI (US)
12th January 2026
16AQI (US)
13th January 2026
17AQI (US)
14th January 2026
18AQI (US)
15th January 2026
21AQI (US)
16th January 2026
15AQI (US)
17th January 2026
18AQI (US)
18th January 2026
14AQI (US)
19th January 2026
24AQI (US)
20th January 2026
28AQI (US)
21st January 2026
27AQI (US)
22nd January 2026
38AQI (US)
23rd January 2026
44AQI (US)
24th January 2026
35AQI (US)
25th January 2026
40AQI (US)
26th January 2026
43AQI (US)
27th January 2026
58AQI (US)
28th January 2026
44AQI (US)
29th January 2026
37AQI (US)
30th January 2026
41AQI (US)
31st January 2026
27AQI (US)
1st February 2026
36AQI (US)
2nd February 2026
30AQI (US)
3rd February 2026
26AQI (US)
4th February 2026
40AQI (US)
5th February 2026
43AQI (US)
6th February 2026
33AQI (US)
7th February 2026
27AQI (US)
8th February 2026
39AQI (US)
9th February 2026
42AQI (US)
10th February 2026
26AQI (US)
11th February 2026
28AQI (US)
12th February 2026
24AQI (US)
13th February 2026
31AQI (US)
14th February 2026
32AQI (US)
15th February 2026
24AQI (US)
16th February 2026
33AQI (US)
17th February 2026
48AQI (US)
18th February 2026
31AQI (US)
19th February 2026
29AQI (US)
20th February 2026
26AQI (US)
21st February 2026
46AQI (US)
22nd February 2026
57AQI (US)
23rd February 2026
46AQI (US)
24th February 2026
52AQI (US)
25th February 2026
36AQI (US)
26th February 2026
26AQI (US)
27th February 2026
26AQI (US)
28th February 2026
33AQI (US)
1st March 2026
33AQI (US)
2nd March 2026
35AQI (US)
3rd March 2026
38AQI (US)
4th March 2026
66AQI (US)
5th March 2026
61AQI (US)
6th March 2026
30AQI (US)
7th March 2026
38AQI (US)
8th March 2026
33AQI (US)
9th March 2026
30AQI (US)
10th March 2026
27AQI (US)
11th March 2026
33AQI (US)
12th March 2026
34AQI (US)
13th March 2026
56AQI (US)
14th March 2026
42AQI (US)
15th March 2026
33AQI (US)
16th March 2026
24AQI (US)
17th March 2026
22AQI (US)
18th March 2026
34AQI (US)
19th March 2026
27AQI (US)
20th March 2026
35AQI (US)
21st March 2026
40AQI (US)
22nd March 2026
26AQI (US)
23rd March 2026
29AQI (US)
24th March 2026
39AQI (US)
25th March 2026
37AQI (US)
26th March 2026
43AQI (US)
27th March 2026
27AQI (US)
28th March 2026
44AQI (US)
29th March 2026
61AQI (US)
30th March 2026
48AQI (US)
31st March 2026
39AQI (US)
1st April 2026
31AQI (US)
2nd April 2026
32AQI (US)
3rd April 2026
30AQI (US)
4th April 2026
21AQI (US)
5th April 2026
32AQI (US)
6th April 2026
23AQI (US)
7th April 2026
26AQI (US)
8th April 2026
26AQI (US)
9th April 2026
27AQI (US)
10th April 2026
23AQI (US)
11th April 2026
26AQI (US)
12th April 2026
56AQI (US)
13th April 2026
50AQI (US)
14th April 2026
30AQI (US)
15th April 2026
35AQI (US)
16th April 2026
31AQI (US)
17th April 2026
18th April 2026
27AQI (US)
19th April 2026
21AQI (US)
20th April 2026
20AQI (US)
21st April 2026
21AQI (US)
22nd April 2026
23rd April 2026
26AQI (US)
24th April 2026
20AQI (US)
25th April 2026
32AQI (US)
26th April 2026
34AQI (US)
27th April 2026
33AQI (US)
28th April 2026
27AQI (US)
29th April 2026
31AQI (US)
30th April 2026
21AQI (US)
1st May 2026
22AQI (US)
2nd May 2026
21AQI (US)
3rd May 2026
19AQI (US)
4th May 2026
24AQI (US)
5th May 2026
23AQI (US)
6th May 2026
23AQI (US)
7th May 2026
19AQI (US)
8th May 2026
21AQI (US)
9th May 2026
10th May 2026
22AQI (US)
11th May 2026
19AQI (US)
12th May 2026
20AQI (US)
13th May 2026
32AQI (US)
14th May 2026
20AQI (US)
15th May 2026
20AQI (US)
16th May 2026
27AQI (US)
17th May 2026
38AQI (US)
18th May 2026
35AQI (US)
19th May 2026
29AQI (US)
20th May 2026
26AQI (US)
21st May 2026
28AQI (US)
22nd May 2026
31AQI (US)
23rd May 2026
30AQI (US)
24th May 2026
26AQI (US)
25th May 2026
19AQI (US)
26th May 2026
22AQI (US)
27th May 2026
30AQI (US)
28th May 2026
44AQI (US)
29th May 2026
23AQI (US)
30th May 2026
31AQI (US)
31st May 2026
29AQI (US)
1st June 2026
25AQI (US)
2nd June 2026
22AQI (US)
3rd June 2026
26AQI (US)
4th June 2026
30AQI (US)
5th June 2026
19AQI (US)
6th June 2026
14AQI (US)
7th June 2026
13AQI (US)
8th June 2026
22AQI (US)
9th June 2026
16AQI (US)
10th June 2026
16AQI (US)
11th June 2026
17AQI (US)
12th June 2026
21AQI (US)
13th June 2026
24AQI (US)
14th June 2026
20AQI (US)
15th June 2026
20AQI (US)
16th June 2026
36AQI (US)
17th June 2026
23AQI (US)
18th June 2026
17AQI (US)
19th June 2026
19AQI (US)
20th June 2026
19AQI (US)
21st June 2026
14AQI (US)
22nd June 2026
18AQI (US)
23rd June 2026
26AQI (US)
24th June 2026
20AQI (US)
25th June 2026
16AQI (US)
26th June 2026
15AQI (US)
27th June 2026
25AQI (US)
28th June 2026
28AQI (US)
29th June 2026
48AQI (US)
30th June 2026
99AQI (US)
1st July 2026
39AQI (US)
2nd July 2026
23AQI (US)
3rd July 2026
18AQI (US)
4th July 2026
25AQI (US)
5th July 2026
28AQI (US)
6th July 2026
17AQI (US)
7th July 2026
21AQI (US)
8th July 2026
26AQI (US)
9th July 2026
42AQI (US)
10th July 2026
27AQI (US)
11th July 2026
17AQI (US)
12th July 2026
25AQI (US)
13th July 2026
30AQI (US)
14th July 2026
34AQI (US)
15th July 2026
36AQI (US)
16th July 2026
46AQI (US)
17th July 2026
49AQI (US)
18th July 2026
48AQI (US)
19th July 2026
60AQI (US)
20th July 2026
52AQI (US)
21st July 2026
52AQI (US)
22nd July 2026
62AQI (US)
23rd July 2026
68AQI (US)
24th July 2026
67AQI (US)
25th July 2026
64AQI (US)
26th July 2026
92AQI (US)
27th July 2026
122AQI (US)
28th July 2026
87AQI (US)
29th July 2026
88AQI (US)
30th July 2026
74AQI (US)
31st July 2026
74AQI (US)
1st August 2026
84AQI (US)
2nd August 2026
84AQI (US)
3rd August 2026
82AQI (US)
4th August 2026
54AQI (US)
5th August 2026
62AQI (US)
6th August 2026
84AQI (US)
7th August 2026
77AQI (US)
8th August 2026
108AQI (US)
9th August 2026
102AQI (US)
10th August 2026
112AQI (US)
11th August 2026
98AQI (US)
12th August 2026
73AQI (US)
13th August 2026
52AQI (US)
14th August 2026
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

27AQI (US)

35AQI (US)

38AQI (US)

29AQI (US)

26AQI (US)

24AQI (US)

49AQI (US)

82AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202635AQI (US)

30
1
26
2
27
4
27
1
30
29
1
18
12
1
10
3
187
31
4

Highest AQI (US) recorded in

August

82AQI (US)

Lowest AQI (US) recorded in

June

24AQI (US)

202533AQI (US)

31
27
1
31
30
31
28
2
31
29
2
18
12
30
1
30
31
347
18

Highest AQI (US) recorded in

September

49AQI (US)

Lowest AQI (US) recorded in

December

26AQI (US)

202437AQI (US)

24
6
28
1
31
30
28
1
29
14
15
2
13
18
21
7
1
28
3
28
2
29
2
303
55
3

Highest AQI (US) recorded in

July

56AQI (US)

Lowest AQI (US) recorded in

November

27AQI (US)

202341AQI (US)

29
1
27
1
23
6
30
24
5
2
21
7
11
19
1
12
19
21
5
2
28
3
28
1
30
284
67
5

Highest AQI (US) recorded in

July

58AQI (US)

Lowest AQI (US) recorded in

February

30AQI (US)

202222AQI (US)

29
22
31
29
31
30
19
1
17
11
1
31
30
27
4
297
15
1

Highest AQI (US) recorded in

September

46AQI (US)

Lowest AQI (US) recorded in

May

12AQI (US)

202129AQI (US)

30
25
3
31
30
31
30
10
16
5
19
8
4
25
3
1
1
30
1
30
29
1
320
32
10
1

Highest AQI (US) recorded in

July

70AQI (US)

Lowest AQI (US) recorded in

January

14AQI (US)

202024AQI (US)

13
20
18
26
29
2
25
6
22
6
2
28
2
30
30
1
241
17
2

Highest AQI (US) recorded in

September

43AQI (US)

Lowest AQI (US) recorded in

December

15AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2023(Avg.)
41AQI (US)
Least Polluted Year Recorded
2022(Avg.)
22AQI (US)

Great Falls's annual 2026 AQI (US) (35) shows an average percentage change of 18.6% (worsened AQI (US)) compared to previous years: 2020 (24), 2021 (29), 2022 (22), 2023 (41), 2024 (37), 2025 (33).