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
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
15th Aug 2021
140AQILowest AQI recorded on
29th Aug 2021
10AQISame Day Analysis (9th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 36 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 9th Aug - 10th Aug 2025
Great Falls, Montana, United States
AQI
Day
Night
.
5 AM9th Aug 2025
9 PM
4 AM10th Aug 2025
Day time
Avg. Highest Time
1PM9th Aug
53AQI
Avg. Lowest Time
9AM9th Aug
34AQI
Night time
Avg. Highest Time
2AM10th Aug
49AQI
Avg. Lowest Time
5AM9th Aug
36AQI
In the last 24 hours,
Great Falls's AQI reached its highest point of 53 at 1 PM during the Day, while the lowest point, 34, was recorded at 9 AM during the Day between 9th Aug and 10th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Great Falls, Montana, United States
JulAug
11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 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
Day
Night
11th Jul 2025325 AMAQI
11th Jul 2025326 AMAQI
11th Jul 2025367 AMAQI
11th Jul 2025388 AMAQI
11th Jul 2025389 AMAQI
11th Jul 20254010 AMAQI
11th Jul 20254111 AMAQI
11th Jul 20254112 PMAQI
11th Jul 2025391 PMAQI
11th Jul 2025392 PMAQI
11th Jul 2025363 PMAQI
11th Jul 2025354 PMAQI
11th Jul 2025365 PMAQI
11th Jul 2025366 PMAQI
11th Jul 2025357 PMAQI
11th Jul 2025358 PMAQI
11th Jul 2025369 PMAQI
11th Jul 20253310 PMAQI
11th Jul 20254211 PMAQI
12th Jul 20255012 AMAQI
12th Jul 2025491 AMAQI
12th Jul 2025522 AMAQI
12th Jul 2025503 AMAQI
12th Jul 2025444 AMAQI
18°C8/27°C
12th Jul 2025445 AMAQI
12th Jul 2025486 AMAQI
12th Jul 2025437 AMAQI
12th Jul 2025448 AMAQI
12th Jul 2025429 AMAQI
12th Jul 20254010 AMAQI
12th Jul 20254011 AMAQI
12th Jul 20253912 PMAQI
12th Jul 2025461 PMAQI
12th Jul 2025462 PMAQI
12th Jul 2025433 PMAQI
12th Jul 2025394 PMAQI
12th Jul 2025425 PMAQI
12th Jul 2025466 PMAQI
12th Jul 2025427 PMAQI
12th Jul 2025408 PMAQI
12th Jul 2025439 PMAQI
12th Jul 20254810 PMAQI
12th Jul 20254711 PMAQI
13th Jul 20254112 AMAQI
13th Jul 2025441 AMAQI
13th Jul 2025512 AMAQI
13th Jul 2025463 AMAQI
13th Jul 2025494 AMAQI
23°C9/33°C
13th Jul 2025485 AMAQI
13th Jul 2025486 AMAQI
13th Jul 2025487 AMAQI
13th Jul 2025488 AMAQI
13th Jul 2025489 AMAQI
13th Jul 20254610 AMAQI
13th Jul 20255211 AMAQI
13th Jul 20255212 PMAQI
13th Jul 2025511 PMAQI
13th Jul 2025522 PMAQI
13th Jul 2025503 PMAQI
13th Jul 2025514 PMAQI
13th Jul 2025525 PMAQI
13th Jul 2025476 PMAQI
13th Jul 2025497 PMAQI
13th Jul 2025488 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254010 PMAQI
13th Jul 20253911 PMAQI
14th Jul 20253712 AMAQI
14th Jul 2025361 AMAQI
14th Jul 2025322 AMAQI
14th Jul 2025353 AMAQI
14th Jul 2025334 AMAQI
25°C12/35°C
14th Jul 2025315 AMAQI
14th Jul 2025306 AMAQI
14th Jul 2025307 AMAQI
14th Jul 2025278 AMAQI
14th Jul 2025289 AMAQI
14th Jul 20253110 AMAQI
14th Jul 20254211 AMAQI
14th Jul 20254812 PMAQI
14th Jul 2025511 PMAQI
14th Jul 2025482 PMAQI
14th Jul 2025483 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025485 PMAQI
14th Jul 2025426 PMAQI
14th Jul 2025387 PMAQI
14th Jul 2025368 PMAQI
14th Jul 2025339 PMAQI
14th Jul 20252510 PMAQI
14th Jul 20252011 PMAQI
15th Jul 20251812 AMAQI
15th Jul 2025161 AMAQI
15th Jul 2025212 AMAQI
15th Jul 2025343 AMAQI
15th Jul 2025444 AMAQI
24°C14/35°C
15th Jul 2025205 AMAQI
15th Jul 2025226 AMAQI
15th Jul 2025217 AMAQI
15th Jul 2025208 AMAQI
15th Jul 2025209 AMAQI
15th Jul 20252010 AMAQI
15th Jul 20252011 AMAQI
15th Jul 20252212 PMAQI
15th Jul 2025251 PMAQI
15th Jul 2025202 PMAQI
15th Jul 2025223 PMAQI
15th Jul 2025224 PMAQI
15th Jul 2025235 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025247 PMAQI
15th Jul 2025228 PMAQI
15th Jul 2025249 PMAQI
15th Jul 20253010 PMAQI
15th Jul 20253311 PMAQI
16th Jul 20253612 AMAQI
16th Jul 2025351 AMAQI
16th Jul 2025352 AMAQI
16th Jul 2025403 AMAQI
16th Jul 2025384 AMAQI
12°C11/12°C
16th Jul 2025425 AMAQI
16th Jul 2025456 AMAQI
16th Jul 2025457 AMAQI
16th Jul 2025428 AMAQI
16th Jul 2025439 AMAQI
16th Jul 20254710 AMAQI
16th Jul 20254711 AMAQI
16th Jul 20254812 PMAQI
16th Jul 2025391 PMAQI
16th Jul 2025362 PMAQI
16th Jul 2025343 PMAQI
16th Jul 2025364 PMAQI
16th Jul 2025335 PMAQI
16th Jul 2025366 PMAQI
16th Jul 2025397 PMAQI
16th Jul 2025448 PMAQI
16th Jul 2025499 PMAQI
16th Jul 20254610 PMAQI
16th Jul 20254611 PMAQI
17th Jul 20254612 AMAQI
17th Jul 2025421 AMAQI
17th Jul 2025412 AMAQI
17th Jul 2025373 AMAQI
17th Jul 2025334 AMAQI
16°C10/26°C
17th Jul 2025295 AMAQI
17th Jul 2025366 AMAQI
17th Jul 2025427 AMAQI
17th Jul 2025438 AMAQI
17th Jul 2025409 AMAQI
17th Jul 20254210 AMAQI
17th Jul 20255311 AMAQI
17th Jul 20255412 PMAQI
17th Jul 2025501 PMAQI
17th Jul 2025482 PMAQI
17th Jul 2025433 PMAQI
17th Jul 2025404 PMAQI
17th Jul 2025395 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025428 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20253510 PMAQI
17th Jul 20253211 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025361 AMAQI
18th Jul 2025362 AMAQI
18th Jul 2025383 AMAQI
18th Jul 2025364 AMAQI
19°C10/29°C
18th Jul 2025365 AMAQI
18th Jul 2025346 AMAQI
18th Jul 2025397 AMAQI
18th Jul 2025418 AMAQI
18th Jul 2025439 AMAQI
18th Jul 20254510 AMAQI
18th Jul 20254711 AMAQI
18th Jul 20254212 PMAQI
18th Jul 2025531 PMAQI
18th Jul 2025502 PMAQI
18th Jul 2025483 PMAQI
18th Jul 2025454 PMAQI
18th Jul 2025475 PMAQI
18th Jul 2025446 PMAQI
18th Jul 2025437 PMAQI
18th Jul 2025438 PMAQI
18th Jul 2025429 PMAQI
18th Jul 20254210 PMAQI
18th Jul 20254111 PMAQI
19th Jul 20254212 AMAQI
19th Jul 2025421 AMAQI
19th Jul 2025482 AMAQI
19th Jul 2025463 AMAQI
19th Jul 2025444 AMAQI
20°C10/29°C
19th Jul 2025485 AMAQI
19th Jul 2025386 AMAQI
19th Jul 2025387 AMAQI
19th Jul 2025368 AMAQI
19th Jul 2025369 AMAQI
19th Jul 20253810 AMAQI
19th Jul 20254311 AMAQI
19th Jul 20254912 PMAQI
19th Jul 2025481 PMAQI
19th Jul 2025422 PMAQI
19th Jul 2025403 PMAQI
19th Jul 2025404 PMAQI
19th Jul 2025405 PMAQI
19th Jul 2025426 PMAQI
19th Jul 2025437 PMAQI
19th Jul 2025428 PMAQI
19th Jul 2025449 PMAQI
19th Jul 20254510 PMAQI
19th Jul 20254711 PMAQI
20th Jul 20254812 AMAQI
20th Jul 2025461 AMAQI
20th Jul 2025502 AMAQI
20th Jul 2025463 AMAQI
20th Jul 2025424 AMAQI
22°C12/32°C
20th Jul 2025435 AMAQI
20th Jul 2025436 AMAQI
20th Jul 2025447 AMAQI
20th Jul 2025488 AMAQI
20th Jul 2025509 AMAQI
20th Jul 20255210 AMAQI
20th Jul 20255611 AMAQI
20th Jul 20255112 PMAQI
20th Jul 2025521 PMAQI
20th Jul 2025512 PMAQI
20th Jul 2025423 PMAQI
20th Jul 2025404 PMAQI
20th Jul 2025425 PMAQI
20th Jul 2025356 PMAQI
20th Jul 2025427 PMAQI
20th Jul 2025428 PMAQI
20th Jul 2025409 PMAQI
20th Jul 20253810 PMAQI
20th Jul 20254011 PMAQI
21st Jul 20254012 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025362 AMAQI
21st Jul 2025373 AMAQI
21st Jul 2025404 AMAQI
21°C11/28°C
21st Jul 2025425 AMAQI
21st Jul 2025396 AMAQI
21st Jul 2025387 AMAQI
21st Jul 2025358 AMAQI
21st Jul 2025349 AMAQI
21st Jul 20253410 AMAQI
21st Jul 20253211 AMAQI
21st Jul 20253412 PMAQI
21st Jul 2025301 PMAQI
21st Jul 2025302 PMAQI
21st Jul 2025323 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025365 PMAQI
21st Jul 2025396 PMAQI
21st Jul 2025377 PMAQI
21st Jul 2025348 PMAQI
21st Jul 2025339 PMAQI
21st Jul 20253710 PMAQI
21st Jul 20253611 PMAQI
22nd Jul 20253712 AMAQI
22nd Jul 2025411 AMAQI
22nd Jul 2025422 AMAQI
22nd Jul 2025433 AMAQI
22nd Jul 2025404 AMAQI
17°C13/20°C
22nd Jul 2025345 AMAQI
22nd Jul 2025376 AMAQI
22nd Jul 2025367 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025389 AMAQI
22nd Jul 20254010 AMAQI
22nd Jul 20254411 AMAQI
22nd Jul 20253812 PMAQI
22nd Jul 2025341 PMAQI
22nd Jul 2025342 PMAQI
22nd Jul 2025303 PMAQI
22nd Jul 2025304 PMAQI
22nd Jul 2025305 PMAQI
22nd Jul 2025316 PMAQI
22nd Jul 2025367 PMAQI
22nd Jul 2025358 PMAQI
22nd Jul 2025279 PMAQI
22nd Jul 20252610 PMAQI
22nd Jul 20252211 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025231 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025253 AMAQI
23rd Jul 2025264 AMAQI
18°C14/26°C
23rd Jul 2025275 AMAQI
23rd Jul 2025306 AMAQI
23rd Jul 2025367 AMAQI
23rd Jul 2025428 AMAQI
23rd Jul 2025439 AMAQI
23rd Jul 20254210 AMAQI
23rd Jul 20254511 AMAQI
23rd Jul 20254612 PMAQI
23rd Jul 2025321 PMAQI
23rd Jul 2025362 PMAQI
23rd Jul 2025393 PMAQI
23rd Jul 2025364 PMAQI
23rd Jul 2025385 PMAQI
23rd Jul 2025426 PMAQI
23rd Jul 2025387 PMAQI
23rd Jul 2025368 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253010 PMAQI
23rd Jul 20253411 PMAQI
24th Jul 20253912 AMAQI
24th Jul 2025421 AMAQI
24th Jul 2025462 AMAQI
24th Jul 2025383 AMAQI
24th Jul 2025444 AMAQI
18°C9/27°C
24th Jul 2025435 AMAQI
24th Jul 2025386 AMAQI
24th Jul 2025337 AMAQI
24th Jul 2025368 AMAQI
24th Jul 2025469 AMAQI
24th Jul 20255210 AMAQI
24th Jul 20254211 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025382 PMAQI
24th Jul 2025483 PMAQI
24th Jul 2025464 PMAQI
24th Jul 2025455 PMAQI
24th Jul 2025436 PMAQI
24th Jul 2025467 PMAQI
24th Jul 2025468 PMAQI
24th Jul 2025499 PMAQI
24th Jul 20254610 PMAQI
24th Jul 20255111 PMAQI
25th Jul 20254812 AMAQI
25th Jul 2025491 AMAQI
25th Jul 2025532 AMAQI
25th Jul 2025513 AMAQI
25th Jul 2025504 AMAQI
22°C9/31°C
25th Jul 2025505 AMAQI
25th Jul 2025506 AMAQI
25th Jul 2025487 AMAQI
25th Jul 2025518 AMAQI
25th Jul 2025519 AMAQI
25th Jul 20254610 AMAQI
25th Jul 20255111 AMAQI
25th Jul 20254812 PMAQI
25th Jul 2025511 PMAQI
25th Jul 2025432 PMAQI
25th Jul 2025423 PMAQI
25th Jul 2025404 PMAQI
25th Jul 2025385 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025417 PMAQI
25th Jul 2025448 PMAQI
25th Jul 2025389 PMAQI
25th Jul 20253810 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253712 AMAQI
26th Jul 2025401 AMAQI
26th Jul 2025412 AMAQI
26th Jul 2025463 AMAQI
26th Jul 2025464 AMAQI
24°C12/34°C
26th Jul 2025415 AMAQI
26th Jul 2025366 AMAQI
26th Jul 2025327 AMAQI
26th Jul 2025348 AMAQI
26th Jul 2025329 AMAQI
26th Jul 20253310 AMAQI
26th Jul 20253611 AMAQI
26th Jul 20254412 PMAQI
26th Jul 2025471 PMAQI
26th Jul 2025462 PMAQI
26th Jul 2025423 PMAQI
26th Jul 2025404 PMAQI
26th Jul 2025405 PMAQI
26th Jul 2025396 PMAQI
26th Jul 2025397 PMAQI
26th Jul 2025418 PMAQI
26th Jul 2025389 PMAQI
26th Jul 20254010 PMAQI
26th Jul 20254311 PMAQI
27th Jul 20254312 AMAQI
27th Jul 2025401 AMAQI
27th Jul 2025382 AMAQI
27th Jul 2025383 AMAQI
27th Jul 2025364 AMAQI
21°C12/31°C
27th Jul 2025345 AMAQI
27th Jul 2025326 AMAQI
27th Jul 2025327 AMAQI
27th Jul 2025368 AMAQI
27th Jul 2025389 AMAQI
27th Jul 20254010 AMAQI
27th Jul 20254711 AMAQI
27th Jul 20254612 PMAQI
27th Jul 2025461 PMAQI
27th Jul 2025452 PMAQI
27th Jul 2025423 PMAQI
27th Jul 2025404 PMAQI
27th Jul 2025425 PMAQI
27th Jul 2025406 PMAQI
27th Jul 2025407 PMAQI
27th Jul 2025368 PMAQI
27th Jul 2025329 PMAQI
27th Jul 20253310 PMAQI
27th Jul 20253411 PMAQI
28th Jul 20253312 AMAQI
28th Jul 2025321 AMAQI
28th Jul 2025322 AMAQI
28th Jul 2025323 AMAQI
28th Jul 2025294 AMAQI
21°C11/30°C
28th Jul 2025285 AMAQI
28th Jul 2025306 AMAQI
28th Jul 2025387 AMAQI
28th Jul 2025368 AMAQI
28th Jul 2025379 AMAQI
28th Jul 20253510 AMAQI
28th Jul 20252611 AMAQI
28th Jul 20253212 PMAQI
28th Jul 2025461 PMAQI
28th Jul 2025382 PMAQI
28th Jul 2025323 PMAQI
28th Jul 2025324 PMAQI
28th Jul 2025415 PMAQI
28th Jul 2025386 PMAQI
28th Jul 2025347 PMAQI
28th Jul 2025378 PMAQI
28th Jul 2025409 PMAQI
28th Jul 20254210 PMAQI
28th Jul 20254411 PMAQI
29th Jul 20254112 AMAQI
29th Jul 2025401 AMAQI
29th Jul 2025392 AMAQI
29th Jul 2025393 AMAQI
29th Jul 2025414 AMAQI
21°C14/30°C
29th Jul 2025405 AMAQI
29th Jul 2025396 AMAQI
29th Jul 2025377 AMAQI
29th Jul 2025408 AMAQI
29th Jul 2025459 AMAQI
29th Jul 20255210 AMAQI
29th Jul 20255511 AMAQI
29th Jul 20255412 PMAQI
29th Jul 2025571 PMAQI
29th Jul 2025532 PMAQI
29th Jul 2025543 PMAQI
29th Jul 2025544 PMAQI
29th Jul 2025505 PMAQI
29th Jul 2025416 PMAQI
29th Jul 2025477 PMAQI
29th Jul 2025468 PMAQI
29th Jul 2025459 PMAQI
29th Jul 20254710 PMAQI
29th Jul 20254411 PMAQI
30th Jul 20254512 AMAQI
30th Jul 2025441 AMAQI
30th Jul 2025422 AMAQI
30th Jul 2025443 AMAQI
30th Jul 2025414 AMAQI
21°C12/29°C
30th Jul 2025435 AMAQI
30th Jul 2025426 AMAQI
30th Jul 2025397 AMAQI
30th Jul 2025498 AMAQI
30th Jul 2025469 AMAQI
30th Jul 20254310 AMAQI
30th Jul 20254311 AMAQI
30th Jul 20254712 PMAQI
30th Jul 2025451 PMAQI
30th Jul 2025502 PMAQI
30th Jul 2025523 PMAQI
30th Jul 2025524 PMAQI
30th Jul 2025525 PMAQI
30th Jul 2025526 PMAQI
30th Jul 2025527 PMAQI
30th Jul 2025528 PMAQI
30th Jul 2025469 PMAQI
30th Jul 20254010 PMAQI
30th Jul 20253811 PMAQI
31st Jul 20254012 AMAQI
31st Jul 2025401 AMAQI
31st Jul 2025442 AMAQI
31st Jul 2025463 AMAQI
31st Jul 2025464 AMAQI
22°C13/29°C
31st Jul 2025515 AMAQI
31st Jul 2025516 AMAQI
31st Jul 2025527 AMAQI
31st Jul 2025528 AMAQI
31st Jul 2025529 AMAQI
31st Jul 20255610 AMAQI
31st Jul 20255611 AMAQI
31st Jul 20254412 PMAQI
31st Jul 2025301 PMAQI
31st Jul 2025312 PMAQI
31st Jul 2025423 PMAQI
31st Jul 2025544 PMAQI
31st Jul 2025395 PMAQI
31st Jul 2025256 PMAQI
31st Jul 2025527 PMAQI
31st Jul 2025478 PMAQI
31st Jul 2025409 PMAQI
31st Jul 20254110 PMAQI
31st Jul 20254111 PMAQI
1st Aug 20253812 AMAQI
1st Aug 2025361 AMAQI
1st Aug 2025422 AMAQI
1st Aug 2025403 AMAQI
1st Aug 2025464 AMAQI
23°C13/31°C
1st Aug 2025495 AMAQI
1st Aug 2025456 AMAQI
1st Aug 2025367 AMAQI
1st Aug 2025408 AMAQI
1st Aug 2025449 AMAQI
1st Aug 20254810 AMAQI
1st Aug 20253811 AMAQI
1st Aug 20255612 PMAQI
1st Aug 2025581 PMAQI
1st Aug 2025592 PMAQI
1st Aug 2025603 PMAQI
1st Aug 2025544 PMAQI
1st Aug 2025525 PMAQI
1st Aug 2025506 PMAQI
1st Aug 2025507 PMAQI
1st Aug 2025448 PMAQI
1st Aug 2025439 PMAQI
1st Aug 20254210 PMAQI
1st Aug 20253711 PMAQI
2nd Aug 20253212 AMAQI
2nd Aug 2025421 AMAQI
2nd Aug 2025492 AMAQI
2nd Aug 2025463 AMAQI
2nd Aug 2025384 AMAQI
22°C14/30°C
2nd Aug 2025425 AMAQI
2nd Aug 2025436 AMAQI
2nd Aug 2025467 AMAQI
2nd Aug 2025458 AMAQI
2nd Aug 2025499 AMAQI
2nd Aug 20254110 AMAQI
2nd Aug 20253011 AMAQI
2nd Aug 20253212 PMAQI
2nd Aug 2025291 PMAQI
2nd Aug 2025302 PMAQI
2nd Aug 2025333 PMAQI
2nd Aug 2025434 PMAQI
2nd Aug 2025425 PMAQI
2nd Aug 2025396 PMAQI
2nd Aug 2025457 PMAQI
2nd Aug 2025488 PMAQI
2nd Aug 2025479 PMAQI
2nd Aug 20254710 PMAQI
2nd Aug 20254011 PMAQI
3rd Aug 20253112 AMAQI
3rd Aug 2025391 AMAQI
3rd Aug 2025462 AMAQI
3rd Aug 2025463 AMAQI
3rd Aug 2025464 AMAQI
21°C14/29°C
3rd Aug 2025455 AMAQI
3rd Aug 2025486 AMAQI
3rd Aug 2025517 AMAQI
3rd Aug 2025418 AMAQI
3rd Aug 2025309 AMAQI
3rd Aug 20253610 AMAQI
3rd Aug 20254011 AMAQI
3rd Aug 20253212 PMAQI
3rd Aug 2025381 PMAQI
3rd Aug 2025352 PMAQI
3rd Aug 2025333 PMAQI
3rd Aug 2025344 PMAQI
3rd Aug 2025445 PMAQI
3rd Aug 2025486 PMAQI
3rd Aug 2025337 PMAQI
3rd Aug 2025428 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254710 PMAQI
3rd Aug 20254811 PMAQI
4th Aug 20254212 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025392 AMAQI
4th Aug 2025383 AMAQI
4th Aug 2025364 AMAQI
22°C13/30°C
4th Aug 2025405 AMAQI
4th Aug 2025386 AMAQI
4th Aug 2025347 AMAQI
4th Aug 2025328 AMAQI
4th Aug 2025449 AMAQI
4th Aug 20253910 AMAQI
4th Aug 20252411 AMAQI
4th Aug 20252312 PMAQI
4th Aug 2025421 PMAQI
4th Aug 2025452 PMAQI
4th Aug 2025463 PMAQI
4th Aug 2025524 PMAQI
4th Aug 2025485 PMAQI
4th Aug 2025506 PMAQI
4th Aug 2025477 PMAQI
4th Aug 2025528 PMAQI
4th Aug 2025509 PMAQI
4th Aug 20255110 PMAQI
4th Aug 20254811 PMAQI
5th Aug 20254812 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025432 AMAQI
5th Aug 2025433 AMAQI
5th Aug 2025394 AMAQI
21°C13/31°C
5th Aug 2025345 AMAQI
5th Aug 2025286 AMAQI
5th Aug 2025237 AMAQI
5th Aug 2025278 AMAQI
5th Aug 2025319 AMAQI
5th Aug 20253510 AMAQI
5th Aug 20254511 AMAQI
5th Aug 20255612 PMAQI
5th Aug 2025581 PMAQI
5th Aug 2025572 PMAQI
5th Aug 2025543 PMAQI
5th Aug 2025524 PMAQI
5th Aug 2025515 PMAQI
5th Aug 2025496 PMAQI
5th Aug 2025447 PMAQI
5th Aug 2025388 PMAQI
5th Aug 2025289 PMAQI
5th Aug 20252510 PMAQI
5th Aug 20253211 PMAQI
6th Aug 20254512 AMAQI
6th Aug 2025421 AMAQI
6th Aug 2025422 AMAQI
6th Aug 2025403 AMAQI
6th Aug 2025444 AMAQI
20°C12/27°C
6th Aug 2025365 AMAQI
6th Aug 2025286 AMAQI
6th Aug 2025267 AMAQI
6th Aug 2025338 AMAQI
6th Aug 2025469 AMAQI
6th Aug 20255410 AMAQI
6th Aug 20254111 AMAQI
6th Aug 20252812 PMAQI
6th Aug 2025461 PMAQI
6th Aug 2025592 PMAQI
6th Aug 2025563 PMAQI
6th Aug 2025544 PMAQI
6th Aug 2025495 PMAQI
6th Aug 2025496 PMAQI
6th Aug 2025477 PMAQI
6th Aug 2025518 PMAQI
6th Aug 2025519 PMAQI
6th Aug 20254910 PMAQI
6th Aug 20253111 PMAQI
7th Aug 20253212 AMAQI
7th Aug 2025381 AMAQI
7th Aug 2025442 AMAQI
7th Aug 2025423 AMAQI
7th Aug 2025404 AMAQI
22°C11/30°C
7th Aug 2025375 AMAQI
7th Aug 2025406 AMAQI
7th Aug 2025317 AMAQI
7th Aug 2025308 AMAQI
7th Aug 2025409 AMAQI
7th Aug 20253610 AMAQI
7th Aug 20253611 AMAQI
7th Aug 20252912 PMAQI
7th Aug 2025441 PMAQI
7th Aug 2025402 PMAQI
7th Aug 2025363 PMAQI
7th Aug 2025324 PMAQI
7th Aug 2025335 PMAQI
7th Aug 2025386 PMAQI
7th Aug 2025387 PMAQI
7th Aug 2025378 PMAQI
7th Aug 2025369 PMAQI
7th Aug 20253410 PMAQI
7th Aug 20252911 PMAQI
8th Aug 20252412 AMAQI
8th Aug 2025211 AMAQI
8th Aug 2025182 AMAQI
8th Aug 2025173 AMAQI
8th Aug 2025184 AMAQI
17°C14/21°C
8th Aug 2025225 AMAQI
8th Aug 2025306 AMAQI
8th Aug 2025317 AMAQI
8th Aug 2025338 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20253510 AMAQI
8th Aug 20253511 AMAQI
8th Aug 20253512 PMAQI
8th Aug 2025341 PMAQI
8th Aug 2025422 PMAQI
8th Aug 2025403 PMAQI
8th Aug 2025404 PMAQI
8th Aug 2025375 PMAQI
8th Aug 2025316 PMAQI
8th Aug 2025307 PMAQI
8th Aug 2025328 PMAQI
8th Aug 2025309 PMAQI
8th Aug 20252710 PMAQI
8th Aug 20252711 PMAQI
9th Aug 20252812 AMAQI
9th Aug 2025271 AMAQI
9th Aug 2025292 AMAQI
9th Aug 2025333 AMAQI
9th Aug 2025354 AMAQI
16°C10/20°C
9th Aug 2025365 AMAQI
9th Aug 2025346 AMAQI
9th Aug 2025367 AMAQI
9th Aug 2025368 AMAQI
9th Aug 2025349 AMAQI
9th Aug 20253710 AMAQI
9th Aug 20253811 AMAQI
9th Aug 20255012 PMAQI
9th Aug 2025531 PMAQI
9th Aug 2025432 PMAQI
9th Aug 2025453 PMAQI
9th Aug 2025394 PMAQI
9th Aug 2025385 PMAQI
9th Aug 2025406 PMAQI
9th Aug 2025387 PMAQI
9th Aug 2025378 PMAQI
9th Aug 2025389 PMAQI
9th Aug 20253910 PMAQI
9th Aug 20254111 PMAQI
10th Aug 20254012 AMAQI
10th Aug 2025461 AMAQI
10th Aug 2025492 AMAQI
10th Aug 2025483 AMAQI
10th Aug 2025434 AMAQI
20°C14/25°C
10th Aug 2025445 AMAQI
5 AM10th Aug 2025416 AMAQI
10th Aug 2025387 AMAQI
10th Aug 2025428 AMAQI
10th Aug 2025459 AMAQI
10th Aug 20253310 AMAQI
10th Aug 20255311 AMAQI
10th Aug 20255412 PMAQI
10th Aug 2025441 PMAQI
1 PM10th Aug 2025362 PMAQI
10th Aug 2025503 PMAQI
10th Aug 2025484 PMAQI
9 PM
1 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
8 AM - 9 PM
41AQI
14 hours / Day
420 hours / Month
Avg. Lowest Time
5 AM - 7 AM
38AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 9 PM (Avg. 41), while the lowest AQI was between 5 AM to 7 AM (Avg. 38).
Night time
Avg. Highest Time
12 AM - 11 PM
39AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
12 AM - 1 AM
38AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 39), while the lowest AQI was between 12 AM to 1 AM (Avg. 38).
2025 Days Vs Air Quality
Great Falls, Montana, United States
2025
99%
218
1%
3
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Good
218 DaysModerate
3 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 222 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Great Falls, Montana, United States
AQI levels in 2025
AQI
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.
1st January 2025
43AQI
43AQI
2nd January 2025
41AQI
41AQI
3rd January 2025
40AQI
40AQI
4th January 2025
31AQI
31AQI
5th January 2025
40AQI
40AQI
6th January 2025
42AQI
42AQI
7th January 2025
39AQI
39AQI
8th January 2025
29AQI
29AQI
9th January 2025
27AQI
27AQI
10th January 2025
31AQI
31AQI
11th January 2025
23AQI
23AQI
12th January 2025
29AQI
29AQI
13th January 2025
27AQI
27AQI
14th January 2025
32AQI
32AQI
15th January 2025
31AQI
31AQI
16th January 2025
30AQI
30AQI
17th January 2025
27AQI
27AQI
18th January 2025
29AQI
29AQI
19th January 2025
38AQI
38AQI
20th January 2025
39AQI
39AQI
21st January 2025
31AQI
31AQI
22nd January 2025
31AQI
31AQI
23rd January 2025
31AQI
31AQI
24th January 2025
29AQI
29AQI
25th January 2025
32AQI
32AQI
26th January 2025
31AQI
31AQI
27th January 2025
37AQI
37AQI
28th January 2025
36AQI
36AQI
29th January 2025
33AQI
33AQI
30th January 2025
35AQI
35AQI
31st January 2025
40AQI
40AQI
1st February 2025
24AQI
24AQI
2nd February 2025
36AQI
36AQI
3rd February 2025
38AQI
38AQI
4th February 2025
34AQI
34AQI
5th February 2025
32AQI
32AQI
6th February 2025
40AQI
40AQI
7th February 2025
41AQI
41AQI
8th February 2025
44AQI
44AQI
9th February 2025
52AQI
52AQI
10th February 2025
35AQI
35AQI
11th February 2025
43AQI
43AQI
12th February 2025
43AQI
43AQI
13th February 2025
26AQI
26AQI
14th February 2025
19AQI
19AQI
15th February 2025
24AQI
24AQI
16th February 2025
28AQI
28AQI
17th February 2025
24AQI
24AQI
18th February 2025
24AQI
24AQI
19th February 2025
33AQI
33AQI
20th February 2025
31AQI
31AQI
21st February 2025
22AQI
22AQI
22nd February 2025
18AQI
18AQI
23rd February 2025
16AQI
16AQI
24th February 2025
21AQI
21AQI
25th February 2025
17AQI
17AQI
26th February 2025
15AQI
15AQI
27th February 2025
20AQI
20AQI
28th February 2025
29AQI
29AQI
1st March 2025
29AQI
29AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
33AQI
33AQI
4th March 2025
21AQI
21AQI
5th March 2025
18AQI
18AQI
6th March 2025
21AQI
21AQI
7th March 2025
20AQI
20AQI
8th March 2025
18AQI
18AQI
9th March 2025
17AQI
17AQI
10th March 2025
20AQI
20AQI
11th March 2025
19AQI
19AQI
12th March 2025
24AQI
24AQI
13th March 2025
24AQI
24AQI
14th March 2025
25AQI
25AQI
15th March 2025
30AQI
30AQI
16th March 2025
24AQI
24AQI
17th March 2025
24AQI
24AQI
18th March 2025
25AQI
25AQI
19th March 2025
32AQI
32AQI
20th March 2025
24AQI
24AQI
21st March 2025
24AQI
24AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
20AQI
20AQI
24th March 2025
20AQI
20AQI
25th March 2025
29AQI
29AQI
26th March 2025
40AQI
40AQI
27th March 2025
45AQI
45AQI
28th March 2025
34AQI
34AQI
29th March 2025
29AQI
29AQI
30th March 2025
31AQI
31AQI
31st March 2025
26AQI
26AQI
1st April 2025
29AQI
29AQI
2nd April 2025
34AQI
34AQI
3rd April 2025
33AQI
33AQI
4th April 2025
39AQI
39AQI
5th April 2025
34AQI
34AQI
6th April 2025
32AQI
32AQI
7th April 2025
33AQI
33AQI
8th April 2025
24AQI
24AQI
9th April 2025
29AQI
29AQI
10th April 2025
41AQI
41AQI
11th April 2025
39AQI
39AQI
12th April 2025
29AQI
29AQI
13th April 2025
28AQI
28AQI
14th April 2025
37AQI
37AQI
15th April 2025
38AQI
38AQI
16th April 2025
33AQI
33AQI
17th April 2025
25AQI
25AQI
18th April 2025
33AQI
33AQI
19th April 2025
31AQI
31AQI
20th April 2025
25AQI
25AQI
21st April 2025
22AQI
22AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
34AQI
34AQI
24th April 2025
31AQI
31AQI
25th April 2025
31AQI
31AQI
26th April 2025
39AQI
39AQI
27th April 2025
39AQI
39AQI
28th April 2025
31AQI
31AQI
29th April 2025
31AQI
31AQI
30th April 2025
29AQI
29AQI
1st May 2025
33AQI
33AQI
2nd May 2025
37AQI
37AQI
3rd May 2025
41AQI
41AQI
4th May 2025
31AQI
31AQI
5th May 2025
27AQI
27AQI
6th May 2025
33AQI
33AQI
7th May 2025
31AQI
31AQI
8th May 2025
34AQI
34AQI
9th May 2025
33AQI
33AQI
10th May 2025
35AQI
35AQI
11th May 2025
30AQI
30AQI
12th May 2025
25AQI
25AQI
13th May 2025
32AQI
32AQI
14th May 2025
33AQI
33AQI
15th May 2025
26AQI
26AQI
16th May 2025
32AQI
32AQI
17th May 2025
26AQI
26AQI
18th May 2025
26AQI
26AQI
19th May 2025
27AQI
27AQI
20th May 2025
24AQI
24AQI
21st May 2025
23AQI
23AQI
22nd May 2025
29AQI
29AQI
23rd May 2025
25AQI
25AQI
24th May 2025
24AQI
24AQI
25th May 2025
25AQI
25AQI
26th May 2025
27AQI
27AQI
27th May 2025
26AQI
26AQI
28th May 2025
26AQI
26AQI
29th May 2025
34AQI
34AQI
30th May 2025
37AQI
37AQI
31st May 2025
34AQI
34AQI
1st June 2025
35AQI
35AQI
2nd June 2025
29AQI
29AQI
3rd June 2025
41AQI
41AQI
4th June 2025
32AQI
32AQI
5th June 2025
31AQI
31AQI
6th June 2025
39AQI
39AQI
7th June 2025
36AQI
36AQI
8th June 2025
54AQI
54AQI
9th June 2025
49AQI
49AQI
10th June 2025
48AQI
48AQI
11th June 2025
49AQI
49AQI
12th June 2025
52AQI
52AQI
13th June 2025
43AQI
43AQI
14th June 2025
34AQI
34AQI
15th June 2025
30AQI
30AQI
16th June 2025
33AQI
33AQI
17th June 2025
36AQI
36AQI
18th June 2025
39AQI
39AQI
19th June 2025
41AQI
41AQI
20th June 2025
38AQI
38AQI
21st June 2025
35AQI
35AQI
22nd June 2025
35AQI
35AQI
23rd June 2025
35AQI
35AQI
24th June 2025
44AQI
44AQI
25th June 2025
42AQI
42AQI
26th June 2025
40AQI
40AQI
27th June 2025
38AQI
38AQI
28th June 2025
35AQI
35AQI
29th June 2025
33AQI
33AQI
30th June 2025
34AQI
34AQI
1st July 2025
35AQI
35AQI
2nd July 2025
38AQI
38AQI
3rd July 2025
34AQI
34AQI
4th July 2025
31AQI
31AQI
5th July 2025
38AQI
38AQI
6th July 2025
35AQI
35AQI
7th July 2025
32AQI
32AQI
8th July 2025
32AQI
32AQI
9th July 2025
36AQI
36AQI
10th July 2025
33AQI
33AQI
11th July 2025
36AQI
36AQI
12th July 2025
45AQI
45AQI
13th July 2025
47AQI
47AQI
14th July 2025
36AQI
36AQI
15th July 2025
24AQI
24AQI
16th July 2025
41AQI
41AQI
17th July 2025
40AQI
40AQI
18th July 2025
41AQI
41AQI
19th July 2025
43AQI
43AQI
20th July 2025
45AQI
45AQI
21st July 2025
36AQI
36AQI
22nd July 2025
35AQI
35AQI
23rd July 2025
33AQI
33AQI
24th July 2025
43AQI
43AQI
25th July 2025
46AQI
46AQI
26th July 2025
40AQI
40AQI
27th July 2025
38AQI
38AQI
28th July 2025
35AQI
35AQI
29th July 2025
45AQI
45AQI
30th July 2025
46AQI
46AQI
31st July 2025
44AQI
44AQI
1st August 2025
46AQI
46AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
41AQI
41AQI
4th August 2025
42AQI
42AQI
5th August 2025
41AQI
41AQI
6th August 2025
44AQI
44AQI
7th August 2025
37AQI
37AQI
8th August 2025
29AQI
29AQI
9th August 2025
36AQI
36AQI
33AQI
30AQI
26AQI
32AQI
30AQI
39AQI
38AQI
40AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202533AQI
31
27
1
31
30
31
28
2
31
9
218
3
Highest AQI recorded in
August40AQI
Lowest AQI recorded in
March26AQI
202437AQI
25
6
28
1
31
30
28
1
29
14
15
2
13
18
21
7
1
28
3
28
2
29
2
304
55
3
Highest AQI recorded in
July56AQI
Lowest AQI recorded in
November27AQI
202341AQI
30
1
27
1
23
6
30
24
5
2
21
7
11
19
1
12
19
21
5
2
28
3
28
1
30
285
67
5
Highest AQI recorded in
July58AQI
Lowest AQI recorded in
February30AQI
202222AQI
30
22
31
29
31
30
19
1
17
11
1
31
30
27
4
298
15
1
Highest AQI recorded in
September46AQI
Lowest AQI recorded in
May12AQI
202129AQI
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 recorded in
July70AQI
Lowest AQI recorded in
January14AQI
202024AQI
13
20
18
26
29
2
25
6
22
6
2
28
2
30
30
1
241
17
2
Highest AQI recorded in
September43AQI
Lowest AQI recorded in
December15AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
41AQILeast Polluted Year Recorded
2022(Avg.)
22AQIGreat Falls's annual 2025 AQI (33) shows an average percentage change of 12.7% (worsened AQI) compared to previous years: 2020 (24), 2021 (29), 2022 (22), 2023 (41), 2024 (37).
