Old Hardin Road, Billings, 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
Old Hardin Road, Billings, Montana, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
10th Aug 2025
44AQILowest AQI recorded on
8th Aug 2025
17AQISame Day Analysis (10th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 44 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Old Hardin Road, Billings, Montana, United States
AQI
Day
Night
.
5 AM10th Aug 2025
8 PM
4 AM11th Aug 2025
Day time
Avg. Highest Time
9AM10th Aug
46AQI
Avg. Lowest Time
5PM10th Aug
32AQI
Night time
Avg. Highest Time
5AM10th Aug
48AQI
Avg. Lowest Time
2AM11th Aug
26AQI
In the last 24 hours,
Old Hardin Road's AQI reached its highest point of 48 at 5 AM during the Night, while the lowest point, 26, was recorded at 2 AM during the Night between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Old Hardin Road, Billings, Montana, United States
JulAug
12th - 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 - 11th11th
Day
Night
12th Jul 2025285 AMAQI
12th Jul 2025286 AMAQI
12th Jul 2025257 AMAQI
12th Jul 2025258 AMAQI
12th Jul 2025289 AMAQI
12th Jul 20253210 AMAQI
12th Jul 20253011 AMAQI
12th Jul 20252812 PMAQI
12th Jul 2025251 PMAQI
12th Jul 2025272 PMAQI
12th Jul 2025263 PMAQI
12th Jul 2025244 PMAQI
12th Jul 2025255 PMAQI
12th Jul 2025266 PMAQI
12th Jul 2025267 PMAQI
12th Jul 2025248 PMAQI
12th Jul 2025209 PMAQI
12th Jul 20252110 PMAQI
12th Jul 20252711 PMAQI
13th Jul 20253212 AMAQI
13th Jul 2025311 AMAQI
13th Jul 2025322 AMAQI
13th Jul 2025323 AMAQI
13th Jul 2025284 AMAQI
23°C9/34°C
13th Jul 2025285 AMAQI
13th Jul 2025286 AMAQI
13th Jul 2025287 AMAQI
13th Jul 2025298 AMAQI
13th Jul 2025299 AMAQI
13th Jul 20253010 AMAQI
13th Jul 20253611 AMAQI
13th Jul 20253812 PMAQI
13th Jul 2025411 PMAQI
13th Jul 2025362 PMAQI
13th Jul 2025333 PMAQI
13th Jul 2025294 PMAQI
13th Jul 2025285 PMAQI
13th Jul 2025266 PMAQI
13th Jul 2025307 PMAQI
13th Jul 2025258 PMAQI
13th Jul 2025209 PMAQI
13th Jul 20252510 PMAQI
13th Jul 20253111 PMAQI
14th Jul 20253412 AMAQI
14th Jul 2025341 AMAQI
14th Jul 2025342 AMAQI
14th Jul 2025343 AMAQI
14th Jul 2025364 AMAQI
25°C12/36°C
14th Jul 2025335 AMAQI
14th Jul 2025276 AMAQI
14th Jul 2025267 AMAQI
14th Jul 2025258 AMAQI
14th Jul 2025279 AMAQI
14th Jul 20253210 AMAQI
14th Jul 20253911 AMAQI
14th Jul 20253712 PMAQI
14th Jul 2025361 PMAQI
14th Jul 2025312 PMAQI
14th Jul 2025323 PMAQI
14th Jul 2025304 PMAQI
14th Jul 2025305 PMAQI
14th Jul 2025286 PMAQI
14th Jul 2025317 PMAQI
14th Jul 2025298 PMAQI
14th Jul 2025309 PMAQI
14th Jul 20253210 PMAQI
14th Jul 20252411 PMAQI
15th Jul 20252012 AMAQI
15th Jul 2025171 AMAQI
15th Jul 2025252 AMAQI
15th Jul 2025273 AMAQI
15th Jul 2025264 AMAQI
27°C14/38°C
15th Jul 2025225 AMAQI
15th Jul 2025236 AMAQI
15th Jul 2025227 AMAQI
15th Jul 2025228 AMAQI
15th Jul 2025219 AMAQI
15th Jul 20251910 AMAQI
15th Jul 20252111 AMAQI
15th Jul 20252412 PMAQI
15th Jul 2025211 PMAQI
15th Jul 2025282 PMAQI
15th Jul 2025203 PMAQI
15th Jul 2025204 PMAQI
15th Jul 2025205 PMAQI
15th Jul 2025236 PMAQI
15th Jul 2025207 PMAQI
15th Jul 2025228 PMAQI
15th Jul 2025349 PMAQI
15th Jul 20253410 PMAQI
15th Jul 20253011 PMAQI
16th Jul 20252712 AMAQI
16th Jul 2025301 AMAQI
16th Jul 2025502 AMAQI
16th Jul 2025493 AMAQI
16th Jul 2025424 AMAQI
16°C13/16°C
16th Jul 2025445 AMAQI
16th Jul 2025436 AMAQI
16th Jul 2025337 AMAQI
16th Jul 2025328 AMAQI
16th Jul 2025209 AMAQI
16th Jul 20252310 AMAQI
16th Jul 20252811 AMAQI
16th Jul 20252412 PMAQI
16th Jul 2025231 PMAQI
16th Jul 2025252 PMAQI
16th Jul 2025303 PMAQI
16th Jul 2025344 PMAQI
16th Jul 2025355 PMAQI
16th Jul 2025326 PMAQI
16th Jul 2025347 PMAQI
16th Jul 2025388 PMAQI
16th Jul 2025479 PMAQI
16th Jul 20254410 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20253512 AMAQI
17th Jul 2025301 AMAQI
17th Jul 2025232 AMAQI
17th Jul 2025273 AMAQI
17th Jul 2025254 AMAQI
15°C11/22°C
17th Jul 2025225 AMAQI
17th Jul 2025226 AMAQI
17th Jul 2025237 AMAQI
17th Jul 2025248 AMAQI
17th Jul 2025269 AMAQI
17th Jul 20252810 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20254212 PMAQI
17th Jul 2025441 PMAQI
17th Jul 2025402 PMAQI
17th Jul 2025323 PMAQI
17th Jul 2025354 PMAQI
17th Jul 2025325 PMAQI
17th Jul 2025326 PMAQI
17th Jul 2025287 PMAQI
17th Jul 2025278 PMAQI
17th Jul 2025309 PMAQI
17th Jul 20253110 PMAQI
17th Jul 20253311 PMAQI
18th Jul 20253712 AMAQI
18th Jul 2025361 AMAQI
18th Jul 2025342 AMAQI
18th Jul 2025243 AMAQI
18th Jul 2025244 AMAQI
21°C11/31°C
18th Jul 2025285 AMAQI
18th Jul 2025316 AMAQI
18th Jul 2025317 AMAQI
18th Jul 2025308 AMAQI
18th Jul 2025309 AMAQI
18th Jul 20252810 AMAQI
18th Jul 20253211 AMAQI
18th Jul 20253012 PMAQI
18th Jul 2025381 PMAQI
18th Jul 2025362 PMAQI
18th Jul 2025363 PMAQI
18th Jul 2025324 PMAQI
18th Jul 2025325 PMAQI
18th Jul 2025336 PMAQI
18th Jul 2025317 PMAQI
18th Jul 2025318 PMAQI
18th Jul 2025329 PMAQI
18th Jul 20253410 PMAQI
18th Jul 20253311 PMAQI
19th Jul 20253312 AMAQI
19th Jul 2025361 AMAQI
19th Jul 2025362 AMAQI
19th Jul 2025363 AMAQI
19th Jul 2025324 AMAQI
22°C14/31°C
19th Jul 2025265 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025277 AMAQI
19th Jul 2025298 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20252610 AMAQI
19th Jul 20253011 AMAQI
19th Jul 20253212 PMAQI
19th Jul 2025311 PMAQI
19th Jul 2025312 PMAQI
19th Jul 2025333 PMAQI
19th Jul 2025314 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025286 PMAQI
19th Jul 2025307 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025239 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252511 PMAQI
20th Jul 20252912 AMAQI
20th Jul 2025311 AMAQI
20th Jul 2025322 AMAQI
20th Jul 2025283 AMAQI
20th Jul 2025304 AMAQI
25°C14/36°C
20th Jul 2025305 AMAQI
20th Jul 2025286 AMAQI
20th Jul 2025327 AMAQI
20th Jul 2025338 AMAQI
20th Jul 2025329 AMAQI
20th Jul 20252810 AMAQI
20th Jul 20252811 AMAQI
20th Jul 20253112 PMAQI
20th Jul 2025311 PMAQI
20th Jul 2025272 PMAQI
20th Jul 2025303 PMAQI
20th Jul 2025314 PMAQI
20th Jul 2025305 PMAQI
20th Jul 2025266 PMAQI
20th Jul 2025267 PMAQI
20th Jul 2025278 PMAQI
20th Jul 2025269 PMAQI
20th Jul 20252610 PMAQI
20th Jul 20252411 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025192 AMAQI
21st Jul 2025223 AMAQI
21st Jul 2025204 AMAQI
23°C14/33°C
21st Jul 2025215 AMAQI
21st Jul 2025246 AMAQI
21st Jul 2025187 AMAQI
21st Jul 2025208 AMAQI
21st Jul 2025229 AMAQI
21st Jul 20252510 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252812 PMAQI
21st Jul 2025291 PMAQI
21st Jul 2025272 PMAQI
21st Jul 2025303 PMAQI
21st Jul 2025254 PMAQI
21st Jul 2025285 PMAQI
21st Jul 2025316 PMAQI
21st Jul 2025267 PMAQI
21st Jul 2025268 PMAQI
21st Jul 2025299 PMAQI
21st Jul 20252610 PMAQI
21st Jul 20252811 PMAQI
22nd Jul 20252612 AMAQI
22nd Jul 2025261 AMAQI
22nd Jul 2025242 AMAQI
22nd Jul 2025223 AMAQI
22nd Jul 2025234 AMAQI
21°C14/30°C
22nd Jul 2025245 AMAQI
22nd Jul 2025296 AMAQI
22nd Jul 2025407 AMAQI
22nd Jul 2025408 AMAQI
22nd Jul 2025429 AMAQI
22nd Jul 20254210 AMAQI
22nd Jul 20253611 AMAQI
22nd Jul 20253412 PMAQI
22nd Jul 2025381 PMAQI
22nd Jul 2025342 PMAQI
22nd Jul 2025323 PMAQI
22nd Jul 2025324 PMAQI
22nd Jul 2025395 PMAQI
22nd Jul 2025366 PMAQI
22nd Jul 2025297 PMAQI
22nd Jul 2025308 PMAQI
22nd Jul 2025309 PMAQI
22nd Jul 20252910 PMAQI
22nd Jul 20253011 PMAQI
23rd Jul 20253012 AMAQI
23rd Jul 2025321 AMAQI
23rd Jul 2025332 AMAQI
23rd Jul 2025333 AMAQI
23rd Jul 2025304 AMAQI
21°C15/28°C
23rd Jul 2025305 AMAQI
23rd Jul 2025306 AMAQI
23rd Jul 2025317 AMAQI
23rd Jul 2025318 AMAQI
23rd Jul 2025319 AMAQI
23rd Jul 20253110 AMAQI
23rd Jul 20253211 AMAQI
23rd Jul 20253412 PMAQI
23rd Jul 2025301 PMAQI
23rd Jul 2025252 PMAQI
23rd Jul 2025243 PMAQI
23rd Jul 2025254 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025216 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025268 PMAQI
23rd Jul 2025289 PMAQI
23rd Jul 20252710 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252212 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025252 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025274 AMAQI
19°C16/27°C
24th Jul 2025295 AMAQI
24th Jul 2025346 AMAQI
24th Jul 2025327 AMAQI
24th Jul 2025298 AMAQI
24th Jul 2025279 AMAQI
24th Jul 20252510 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20252612 PMAQI
24th Jul 2025231 PMAQI
24th Jul 2025242 PMAQI
24th Jul 2025283 PMAQI
24th Jul 2025274 PMAQI
24th Jul 2025245 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025267 PMAQI
24th Jul 2025268 PMAQI
24th Jul 2025239 PMAQI
24th Jul 20252610 PMAQI
24th Jul 20253011 PMAQI
25th Jul 20253312 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025362 AMAQI
25th Jul 2025453 AMAQI
25th Jul 2025474 AMAQI
23°C14/32°C
25th Jul 2025495 AMAQI
25th Jul 2025476 AMAQI
25th Jul 2025457 AMAQI
25th Jul 2025428 AMAQI
25th Jul 2025379 AMAQI
25th Jul 20252810 AMAQI
25th Jul 20253111 AMAQI
25th Jul 20253112 PMAQI
25th Jul 2025321 PMAQI
25th Jul 2025302 PMAQI
25th Jul 2025293 PMAQI
25th Jul 2025294 PMAQI
25th Jul 2025305 PMAQI
25th Jul 2025316 PMAQI
25th Jul 2025347 PMAQI
25th Jul 2025328 PMAQI
25th Jul 2025309 PMAQI
25th Jul 20253010 PMAQI
25th Jul 20253211 PMAQI
26th Jul 20253412 AMAQI
26th Jul 2025351 AMAQI
26th Jul 2025352 AMAQI
26th Jul 2025323 AMAQI
26th Jul 2025304 AMAQI
26°C14/36°C
26th Jul 2025265 AMAQI
26th Jul 2025266 AMAQI
26th Jul 2025277 AMAQI
26th Jul 2025278 AMAQI
26th Jul 2025289 AMAQI
26th Jul 20252810 AMAQI
26th Jul 20253011 AMAQI
26th Jul 20253212 PMAQI
26th Jul 2025301 PMAQI
26th Jul 2025302 PMAQI
26th Jul 2025303 PMAQI
26th Jul 2025294 PMAQI
26th Jul 2025235 PMAQI
26th Jul 2025186 PMAQI
26th Jul 2025267 PMAQI
26th Jul 2025288 PMAQI
26th Jul 2025289 PMAQI
26th Jul 20252910 PMAQI
26th Jul 20252811 PMAQI
27th Jul 20252512 AMAQI
27th Jul 2025221 AMAQI
27th Jul 2025182 AMAQI
27th Jul 2025153 AMAQI
27th Jul 2025144 AMAQI
24°C14/35°C
27th Jul 2025165 AMAQI
27th Jul 2025206 AMAQI
27th Jul 2025187 AMAQI
27th Jul 2025228 AMAQI
27th Jul 2025269 AMAQI
27th Jul 20252610 AMAQI
27th Jul 20252611 AMAQI
27th Jul 20253212 PMAQI
27th Jul 2025381 PMAQI
27th Jul 2025402 PMAQI
27th Jul 2025383 PMAQI
27th Jul 2025364 PMAQI
27th Jul 2025345 PMAQI
27th Jul 2025306 PMAQI
27th Jul 2025257 PMAQI
27th Jul 2025258 PMAQI
27th Jul 2025249 PMAQI
27th Jul 20252610 PMAQI
27th Jul 20252711 PMAQI
28th Jul 20252212 AMAQI
28th Jul 2025201 AMAQI
28th Jul 2025222 AMAQI
28th Jul 2025233 AMAQI
28th Jul 2025254 AMAQI
24°C14/34°C
28th Jul 2025285 AMAQI
28th Jul 2025386 AMAQI
28th Jul 2025307 AMAQI
28th Jul 2025258 AMAQI
28th Jul 2025239 AMAQI
28th Jul 20252310 AMAQI
28th Jul 20252611 AMAQI
28th Jul 20253312 PMAQI
28th Jul 2025261 PMAQI
28th Jul 2025322 PMAQI
28th Jul 2025243 PMAQI
28th Jul 2025244 PMAQI
28th Jul 2025275 PMAQI
28th Jul 2025266 PMAQI
28th Jul 2025257 PMAQI
28th Jul 2025258 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20252610 PMAQI
28th Jul 20253211 PMAQI
29th Jul 20254012 AMAQI
29th Jul 2025411 AMAQI
29th Jul 2025432 AMAQI
29th Jul 2025323 AMAQI
29th Jul 2025284 AMAQI
23°C15/30°C
29th Jul 2025255 AMAQI
29th Jul 2025286 AMAQI
29th Jul 2025307 AMAQI
29th Jul 2025318 AMAQI
29th Jul 2025339 AMAQI
29th Jul 20253410 AMAQI
29th Jul 20253411 AMAQI
29th Jul 20253812 PMAQI
29th Jul 2025381 PMAQI
29th Jul 2025382 PMAQI
29th Jul 2025383 PMAQI
29th Jul 2025414 PMAQI
29th Jul 2025355 PMAQI
29th Jul 2025316 PMAQI
29th Jul 2025347 PMAQI
29th Jul 2025368 PMAQI
29th Jul 2025389 PMAQI
29th Jul 20253910 PMAQI
29th Jul 20253711 PMAQI
30th Jul 20253112 AMAQI
30th Jul 2025291 AMAQI
30th Jul 2025292 AMAQI
30th Jul 2025293 AMAQI
30th Jul 2025344 AMAQI
21°C16/27°C
30th Jul 2025465 AMAQI
30th Jul 2025456 AMAQI
30th Jul 2025337 AMAQI
30th Jul 2025338 AMAQI
30th Jul 2025359 AMAQI
30th Jul 20253510 AMAQI
30th Jul 20254011 AMAQI
30th Jul 20254812 PMAQI
30th Jul 2025491 PMAQI
30th Jul 2025532 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 2025439 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253611 PMAQI
31st Jul 20253412 AMAQI
31st Jul 2025381 AMAQI
31st Jul 2025402 AMAQI
31st Jul 2025453 AMAQI
31st Jul 2025444 AMAQI
21°C15/27°C
31st Jul 2025515 AMAQI
31st Jul 2025486 AMAQI
31st Jul 2025507 AMAQI
31st Jul 2025458 AMAQI
31st Jul 2025479 AMAQI
31st Jul 20255210 AMAQI
31st Jul 20255211 AMAQI
31st Jul 20255212 PMAQI
31st Jul 2025411 PMAQI
31st Jul 2025312 PMAQI
31st Jul 2025313 PMAQI
31st Jul 2025304 PMAQI
31st Jul 2025305 PMAQI
31st Jul 2025286 PMAQI
31st Jul 2025427 PMAQI
31st Jul 2025348 PMAQI
31st Jul 2025309 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252612 AMAQI
1st Aug 2025261 AMAQI
1st Aug 2025262 AMAQI
1st Aug 2025263 AMAQI
1st Aug 2025254 AMAQI
22°C14/31°C
1st Aug 2025315 AMAQI
1st Aug 2025336 AMAQI
1st Aug 2025257 AMAQI
1st Aug 2025238 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20254210 AMAQI
1st Aug 20253411 AMAQI
1st Aug 20253712 PMAQI
1st Aug 2025451 PMAQI
1st Aug 2025542 PMAQI
1st Aug 2025563 PMAQI
1st Aug 2025494 PMAQI
1st Aug 2025485 PMAQI
1st Aug 2025446 PMAQI
1st Aug 2025347 PMAQI
1st Aug 2025448 PMAQI
1st Aug 2025539 PMAQI
1st Aug 20254810 PMAQI
1st Aug 20254111 PMAQI
2nd Aug 20253612 AMAQI
2nd Aug 2025351 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025243 AMAQI
2nd Aug 2025244 AMAQI
23°C12/34°C
2nd Aug 2025355 AMAQI
2nd Aug 2025356 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025338 AMAQI
2nd Aug 2025379 AMAQI
2nd Aug 20253610 AMAQI
2nd Aug 20253811 AMAQI
2nd Aug 20253412 PMAQI
2nd Aug 2025231 PMAQI
2nd Aug 2025382 PMAQI
2nd Aug 2025443 PMAQI
2nd Aug 2025404 PMAQI
2nd Aug 2025325 PMAQI
2nd Aug 2025276 PMAQI
2nd Aug 2025297 PMAQI
2nd Aug 2025308 PMAQI
2nd Aug 2025269 PMAQI
2nd Aug 20252710 PMAQI
2nd Aug 20253411 PMAQI
3rd Aug 20253512 AMAQI
3rd Aug 2025341 AMAQI
3rd Aug 2025302 AMAQI
3rd Aug 2025263 AMAQI
3rd Aug 2025254 AMAQI
23°C13/33°C
3rd Aug 2025245 AMAQI
3rd Aug 2025226 AMAQI
3rd Aug 2025227 AMAQI
3rd Aug 2025208 AMAQI
3rd Aug 2025219 AMAQI
3rd Aug 20252410 AMAQI
3rd Aug 20252511 AMAQI
3rd Aug 20253212 PMAQI
3rd Aug 2025421 PMAQI
3rd Aug 2025322 PMAQI
3rd Aug 2025223 PMAQI
3rd Aug 2025364 PMAQI
3rd Aug 2025385 PMAQI
3rd Aug 2025226 PMAQI
3rd Aug 2025307 PMAQI
3rd Aug 2025288 PMAQI
3rd Aug 2025269 PMAQI
3rd Aug 20252610 PMAQI
3rd Aug 20255611 PMAQI
4th Aug 20255612 AMAQI
4th Aug 2025521 AMAQI
4th Aug 2025502 AMAQI
4th Aug 2025423 AMAQI
4th Aug 2025464 AMAQI
24°C14/32°C
4th Aug 2025445 AMAQI
4th Aug 2025366 AMAQI
4th Aug 2025287 AMAQI
4th Aug 2025228 AMAQI
4th Aug 2025279 AMAQI
4th Aug 20253110 AMAQI
4th Aug 20253011 AMAQI
4th Aug 20253012 PMAQI
4th Aug 2025341 PMAQI
4th Aug 2025342 PMAQI
4th Aug 2025333 PMAQI
4th Aug 2025294 PMAQI
4th Aug 2025315 PMAQI
4th Aug 2025356 PMAQI
4th Aug 2025357 PMAQI
4th Aug 2025338 PMAQI
4th Aug 2025269 PMAQI
4th Aug 20252610 PMAQI
4th Aug 20252611 PMAQI
5th Aug 20252612 AMAQI
5th Aug 2025281 AMAQI
5th Aug 2025252 AMAQI
5th Aug 2025243 AMAQI
5th Aug 2025324 AMAQI
23°C14/33°C
5th Aug 2025285 AMAQI
5th Aug 2025296 AMAQI
5th Aug 2025257 AMAQI
5th Aug 2025258 AMAQI
5th Aug 2025289 AMAQI
5th Aug 20253110 AMAQI
5th Aug 20253211 AMAQI
5th Aug 20252812 PMAQI
5th Aug 2025241 PMAQI
5th Aug 2025262 PMAQI
5th Aug 2025313 PMAQI
5th Aug 2025334 PMAQI
5th Aug 2025265 PMAQI
5th Aug 2025226 PMAQI
5th Aug 2025287 PMAQI
5th Aug 2025258 PMAQI
5th Aug 2025249 PMAQI
5th Aug 20252610 PMAQI
5th Aug 20252511 PMAQI
6th Aug 20253012 AMAQI
6th Aug 2025341 AMAQI
6th Aug 2025342 AMAQI
6th Aug 2025353 AMAQI
6th Aug 2025364 AMAQI
23°C16/31°C
6th Aug 2025325 AMAQI
6th Aug 2025306 AMAQI
6th Aug 2025247 AMAQI
6th Aug 2025198 AMAQI
6th Aug 2025249 AMAQI
6th Aug 20252710 AMAQI
6th Aug 20252611 AMAQI
6th Aug 20253812 PMAQI
6th Aug 2025551 PMAQI
6th Aug 2025562 PMAQI
6th Aug 2025513 PMAQI
6th Aug 2025424 PMAQI
6th Aug 2025345 PMAQI
6th Aug 2025286 PMAQI
6th Aug 2025267 PMAQI
6th Aug 2025228 PMAQI
6th Aug 2025209 PMAQI
6th Aug 20251910 PMAQI
6th Aug 20251711 PMAQI
7th Aug 20252012 AMAQI
7th Aug 2025261 AMAQI
7th Aug 2025282 AMAQI
7th Aug 2025263 AMAQI
7th Aug 2025244 AMAQI
25°C14/34°C
7th Aug 2025195 AMAQI
7th Aug 2025226 AMAQI
7th Aug 2025327 AMAQI
7th Aug 2025338 AMAQI
7th Aug 2025289 AMAQI
7th Aug 20252210 AMAQI
7th Aug 20252211 AMAQI
7th Aug 20252812 PMAQI
7th Aug 2025301 PMAQI
7th Aug 2025262 PMAQI
7th Aug 2025243 PMAQI
7th Aug 2025264 PMAQI
7th Aug 2025265 PMAQI
7th Aug 2025226 PMAQI
7th Aug 2025257 PMAQI
7th Aug 2025278 PMAQI
7th Aug 2025299 PMAQI
7th Aug 20253010 PMAQI
7th Aug 20252311 PMAQI
8th Aug 20252012 AMAQI
8th Aug 2025181 AMAQI
8th Aug 2025192 AMAQI
8th Aug 2025173 AMAQI
8th Aug 2025164 AMAQI
23°C15/32°C
8th Aug 2025185 AMAQI
8th Aug 2025166 AMAQI
8th Aug 2025157 AMAQI
8th Aug 2025168 AMAQI
8th Aug 2025169 AMAQI
8th Aug 20251510 AMAQI
8th Aug 20251611 AMAQI
8th Aug 20251412 PMAQI
8th Aug 2025131 PMAQI
8th Aug 2025162 PMAQI
8th Aug 2025153 PMAQI
8th Aug 2025174 PMAQI
8th Aug 2025185 PMAQI
8th Aug 2025186 PMAQI
8th Aug 2025157 PMAQI
8th Aug 2025168 PMAQI
8th Aug 2025219 PMAQI
8th Aug 20251810 PMAQI
8th Aug 20251811 PMAQI
9th Aug 20251712 AMAQI
9th Aug 2025181 AMAQI
9th Aug 2025162 AMAQI
9th Aug 2025163 AMAQI
9th Aug 2025204 AMAQI
18°C11/27°C
9th Aug 2025205 AMAQI
9th Aug 2025206 AMAQI
9th Aug 2025187 AMAQI
9th Aug 2025198 AMAQI
9th Aug 2025209 AMAQI
9th Aug 20252110 AMAQI
9th Aug 20252111 AMAQI
9th Aug 20252212 PMAQI
9th Aug 2025261 PMAQI
9th Aug 2025302 PMAQI
9th Aug 2025263 PMAQI
9th Aug 2025264 PMAQI
9th Aug 2025265 PMAQI
9th Aug 2025286 PMAQI
9th Aug 2025217 PMAQI
9th Aug 2025188 PMAQI
9th Aug 2025209 PMAQI
9th Aug 20252110 PMAQI
9th Aug 20252311 PMAQI
10th Aug 20253412 AMAQI
10th Aug 2025531 AMAQI
10th Aug 2025542 AMAQI
10th Aug 2025503 AMAQI
10th Aug 2025504 AMAQI
20°C11/28°C
10th Aug 2025485 AMAQI
10th Aug 2025456 AMAQI
10th Aug 2025447 AMAQI
10th Aug 2025428 AMAQI
10th Aug 2025469 AMAQI
10th Aug 20254110 AMAQI
10th Aug 20254011 AMAQI
10th Aug 20254412 PMAQI
10th Aug 2025361 PMAQI
10th Aug 2025342 PMAQI
10th Aug 2025363 PMAQI
10th Aug 2025394 PMAQI
10th Aug 2025325 PMAQI
10th Aug 2025356 PMAQI
10th Aug 2025387 PMAQI
10th Aug 2025368 PMAQI
10th Aug 2025379 PMAQI
10th Aug 20253410 PMAQI
10th Aug 20252611 PMAQI
11th Aug 20252712 AMAQI
11th Aug 2025301 AMAQI
11th Aug 2025262 AMAQI
11th Aug 2025283 AMAQI
11th Aug 2025304 AMAQI
22°C10/31°C
11th Aug 2025265 AMAQI
5 AM11th Aug 2025276 AMAQI
11th Aug 2025307 AMAQI
11th Aug 2025258 AMAQI
11th Aug 2025259 AMAQI
11th Aug 20252710 AMAQI
11th Aug 20253411 AMAQI
11th Aug 20253412 PMAQI
12 PM11th Aug 2025321 PMAQI
11th Aug 2025352 PMAQI
11th Aug 2025423 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
12 PM - 5 PM
33AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
5 AM - 10 AM
29AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 5 PM (Avg. 33), while the lowest AQI was between 5 AM to 10 AM (Avg. 29).
Night time
Avg. Highest Time
12 AM - 11 PM
30AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
30AQI
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. 30), while the lowest AQI was between 12 AM to 11 PM (Avg. 30).
2025 Days Vs Air Quality
Old Hardin Road, Billings, Montana, United States
2025
99%
136
0.7%
1
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
136 DaysModerate
1 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 223 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
Old Hardin Road, Billings, 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 March 2025
20AQI
20AQI
2nd March 2025
24AQI
24AQI
3rd March 2025
17AQI
17AQI
4th March 2025
17AQI
17AQI
5th March 2025
20AQI
20AQI
1st April 2025
24AQI
24AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
18AQI
18AQI
4th April 2025
28AQI
28AQI
5th April 2025
25AQI
25AQI
6th April 2025
30AQI
30AQI
7th April 2025
29AQI
29AQI
8th April 2025
26AQI
26AQI
9th April 2025
25AQI
25AQI
10th April 2025
39AQI
39AQI
11th April 2025
42AQI
42AQI
12th April 2025
29AQI
29AQI
13th April 2025
20AQI
20AQI
14th April 2025
28AQI
28AQI
15th April 2025
23AQI
23AQI
16th April 2025
25AQI
25AQI
17th April 2025
15AQI
15AQI
18th April 2025
20AQI
20AQI
19th April 2025
20AQI
20AQI
20th April 2025
16AQI
16AQI
21st April 2025
15AQI
15AQI
22nd April 2025
14AQI
14AQI
23rd April 2025
20AQI
20AQI
24th April 2025
22AQI
22AQI
25th April 2025
25AQI
25AQI
26th April 2025
16AQI
16AQI
27th April 2025
19AQI
19AQI
28th April 2025
22AQI
22AQI
29th April 2025
19AQI
19AQI
30th April 2025
15AQI
15AQI
1st May 2025
16AQI
16AQI
2nd May 2025
24AQI
24AQI
3rd May 2025
26AQI
26AQI
4th May 2025
27AQI
27AQI
5th May 2025
18AQI
18AQI
6th May 2025
23AQI
23AQI
7th May 2025
21AQI
21AQI
8th May 2025
17AQI
17AQI
9th May 2025
26AQI
26AQI
10th May 2025
22AQI
22AQI
11th May 2025
17AQI
17AQI
12th May 2025
25AQI
25AQI
13th May 2025
17AQI
17AQI
14th May 2025
16AQI
16AQI
15th May 2025
17AQI
17AQI
16th May 2025
16AQI
16AQI
17th May 2025
15AQI
15AQI
18th May 2025
14AQI
14AQI
19th May 2025
12AQI
12AQI
20th May 2025
13AQI
13AQI
21st May 2025
16AQI
16AQI
22nd May 2025
22AQI
22AQI
23rd May 2025
15AQI
15AQI
24th May 2025
19AQI
19AQI
25th May 2025
21AQI
21AQI
26th May 2025
15AQI
15AQI
27th May 2025
17AQI
17AQI
28th May 2025
20AQI
20AQI
29th May 2025
18AQI
18AQI
30th May 2025
16AQI
16AQI
31st May 2025
24AQI
24AQI
1st June 2025
23AQI
23AQI
2nd June 2025
14AQI
14AQI
3rd June 2025
35AQI
35AQI
4th June 2025
18AQI
18AQI
5th June 2025
21AQI
21AQI
6th June 2025
19AQI
19AQI
7th June 2025
29AQI
29AQI
8th June 2025
50AQI
50AQI
9th June 2025
53AQI
53AQI
10th June 2025
43AQI
43AQI
11th June 2025
48AQI
48AQI
12th June 2025
35AQI
35AQI
13th June 2025
27AQI
27AQI
14th June 2025
22AQI
22AQI
15th June 2025
27AQI
27AQI
16th June 2025
21AQI
21AQI
17th June 2025
24AQI
24AQI
18th June 2025
28AQI
28AQI
19th June 2025
33AQI
33AQI
20th June 2025
30AQI
30AQI
21st June 2025
20AQI
20AQI
22nd June 2025
18AQI
18AQI
23rd June 2025
19AQI
19AQI
24th June 2025
32AQI
32AQI
25th June 2025
26AQI
26AQI
26th June 2025
21AQI
21AQI
27th June 2025
28AQI
28AQI
28th June 2025
23AQI
23AQI
29th June 2025
19AQI
19AQI
30th June 2025
21AQI
21AQI
1st July 2025
25AQI
25AQI
2nd July 2025
34AQI
34AQI
3rd July 2025
37AQI
37AQI
4th July 2025
33AQI
33AQI
5th July 2025
31AQI
31AQI
6th July 2025
30AQI
30AQI
7th July 2025
27AQI
27AQI
8th July 2025
25AQI
25AQI
9th July 2025
30AQI
30AQI
10th July 2025
30AQI
30AQI
11th July 2025
29AQI
29AQI
12th July 2025
27AQI
27AQI
13th July 2025
30AQI
30AQI
14th July 2025
31AQI
31AQI
15th July 2025
24AQI
24AQI
16th July 2025
36AQI
36AQI
17th July 2025
30AQI
30AQI
18th July 2025
32AQI
32AQI
19th July 2025
29AQI
29AQI
20th July 2025
29AQI
29AQI
21st July 2025
25AQI
25AQI
22nd July 2025
31AQI
31AQI
23rd July 2025
28AQI
28AQI
24th July 2025
26AQI
26AQI
25th July 2025
35AQI
35AQI
26th July 2025
29AQI
29AQI
27th July 2025
25AQI
25AQI
28th July 2025
26AQI
26AQI
29th July 2025
35AQI
35AQI
30th July 2025
41AQI
41AQI
31st July 2025
39AQI
39AQI
1st August 2025
37AQI
37AQI
2nd August 2025
31AQI
31AQI
3rd August 2025
29AQI
29AQI
4th August 2025
36AQI
36AQI
5th August 2025
27AQI
27AQI
6th August 2025
31AQI
31AQI
7th August 2025
25AQI
25AQI
8th August 2025
17AQI
17AQI
9th August 2025
21AQI
21AQI
10th August 2025
44AQI
44AQI
20AQI
23AQI
19AQI
28AQI
30AQI
30AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202525AQI
5
30
31
29
1
31
10
136
1
Highest AQI recorded in
July30AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
25AQILeast Polluted Year Recorded
2025(Avg.)
25AQIOld Hardin Road's annual 2025 AQI (25) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
