Johnstown, Pennsylvania, 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
Johnstown, Pennsylvania, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
8th Aug 2025
75AQILowest AQI recorded on
8th Aug 2024
15AQISame Day Analysis (13th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 29 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 13th Aug - 14th Aug 2025
Johnstown, Pennsylvania, United States
AQI
Day
Night
.
6 AM13th Aug 2025
8 PM
5 AM14th Aug 2025
Day time
Avg. Highest Time
1PM13th Aug
34AQI
Avg. Lowest Time
6AM13th Aug
24AQI
Night time
Avg. Highest Time
5AM14th Aug
36AQI
Avg. Lowest Time
12AM14th Aug
27AQI
In the last 24 hours,
Johnstown's AQI reached its highest point of 36 at 5 AM during the Night, while the lowest point, 24, was recorded at 6 AM during the Day between 13th Aug and 14th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Johnstown, Pennsylvania, United States
JulAug
15th - 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 - 12th12th - 13th13th - 14th14th
Day
Night
15th Jul 2025376 AMAQI
15th Jul 2025387 AMAQI
15th Jul 2025368 AMAQI
15th Jul 2025389 AMAQI
15th Jul 20254010 AMAQI
15th Jul 20254111 AMAQI
15th Jul 20254012 PMAQI
15th Jul 2025421 PMAQI
15th Jul 2025402 PMAQI
15th Jul 2025433 PMAQI
15th Jul 2025434 PMAQI
15th Jul 2025425 PMAQI
15th Jul 2025426 PMAQI
15th Jul 2025407 PMAQI
15th Jul 2025408 PMAQI
15th Jul 2025399 PMAQI
15th Jul 20254210 PMAQI
15th Jul 20254011 PMAQI
16th Jul 20254012 AMAQI
16th Jul 2025401 AMAQI
16th Jul 2025402 AMAQI
16th Jul 2025393 AMAQI
16th Jul 2025404 AMAQI
16th Jul 2025425 AMAQI
24°C19/29°C
16th Jul 2025446 AMAQI
16th Jul 2025447 AMAQI
16th Jul 2025428 AMAQI
16th Jul 2025419 AMAQI
16th Jul 20254010 AMAQI
16th Jul 20254011 AMAQI
16th Jul 20254112 PMAQI
16th Jul 2025431 PMAQI
16th Jul 2025392 PMAQI
16th Jul 2025413 PMAQI
16th Jul 2025384 PMAQI
16th Jul 2025385 PMAQI
16th Jul 2025346 PMAQI
16th Jul 2025427 PMAQI
16th Jul 2025408 PMAQI
16th Jul 2025339 PMAQI
16th Jul 20253310 PMAQI
16th Jul 20253311 PMAQI
17th Jul 20253312 AMAQI
17th Jul 2025291 AMAQI
17th Jul 2025202 AMAQI
17th Jul 2025193 AMAQI
17th Jul 2025224 AMAQI
17th Jul 2025265 AMAQI
23°C19/28°C
17th Jul 2025326 AMAQI
17th Jul 2025387 AMAQI
17th Jul 2025398 AMAQI
17th Jul 2025379 AMAQI
17th Jul 20253210 AMAQI
17th Jul 20252911 AMAQI
17th Jul 20252812 PMAQI
17th Jul 2025271 PMAQI
17th Jul 2025282 PMAQI
17th Jul 2025313 PMAQI
17th Jul 2025304 PMAQI
17th Jul 2025275 PMAQI
17th Jul 2025266 PMAQI
17th Jul 2025257 PMAQI
17th Jul 2025268 PMAQI
17th Jul 2025269 PMAQI
17th Jul 20252610 PMAQI
17th Jul 20252611 PMAQI
18th Jul 20252612 AMAQI
18th Jul 2025271 AMAQI
18th Jul 2025262 AMAQI
18th Jul 2025283 AMAQI
18th Jul 2025254 AMAQI
18th Jul 2025245 AMAQI
24°C22/30°C
18th Jul 2025256 AMAQI
18th Jul 2025247 AMAQI
18th Jul 2025248 AMAQI
18th Jul 2025249 AMAQI
18th Jul 20252410 AMAQI
18th Jul 20252411 AMAQI
18th Jul 20252812 PMAQI
18th Jul 2025331 PMAQI
18th Jul 2025312 PMAQI
18th Jul 2025313 PMAQI
18th Jul 2025324 PMAQI
18th Jul 2025325 PMAQI
18th Jul 2025336 PMAQI
18th Jul 2025277 PMAQI
18th Jul 2025278 PMAQI
18th Jul 2025329 PMAQI
18th Jul 20253210 PMAQI
18th Jul 20253311 PMAQI
19th Jul 20253412 AMAQI
19th Jul 2025361 AMAQI
19th Jul 2025412 AMAQI
19th Jul 2025363 AMAQI
19th Jul 2025364 AMAQI
19th Jul 2025335 AMAQI
21°C20/24°C
19th Jul 2025336 AMAQI
19th Jul 2025357 AMAQI
19th Jul 2025348 AMAQI
19th Jul 2025359 AMAQI
19th Jul 20253310 AMAQI
19th Jul 20253111 AMAQI
19th Jul 20253112 PMAQI
19th Jul 2025301 PMAQI
19th Jul 2025322 PMAQI
19th Jul 2025343 PMAQI
19th Jul 2025344 PMAQI
19th Jul 2025345 PMAQI
19th Jul 2025336 PMAQI
19th Jul 2025347 PMAQI
19th Jul 2025348 PMAQI
19th Jul 2025339 PMAQI
19th Jul 20253410 PMAQI
19th Jul 20253311 PMAQI
20th Jul 20253512 AMAQI
20th Jul 2025361 AMAQI
20th Jul 2025382 AMAQI
20th Jul 2025393 AMAQI
20th Jul 2025384 AMAQI
20th Jul 2025395 AMAQI
23°C20/28°C
20th Jul 2025386 AMAQI
20th Jul 2025387 AMAQI
20th Jul 2025368 AMAQI
20th Jul 2025369 AMAQI
20th Jul 20253610 AMAQI
20th Jul 20253211 AMAQI
20th Jul 20253112 PMAQI
20th Jul 2025291 PMAQI
20th Jul 2025302 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025325 PMAQI
20th Jul 2025316 PMAQI
20th Jul 2025347 PMAQI
20th Jul 2025348 PMAQI
20th Jul 2025339 PMAQI
20th Jul 20253210 PMAQI
20th Jul 20253211 PMAQI
21st Jul 20253412 AMAQI
21st Jul 2025341 AMAQI
21st Jul 2025312 AMAQI
21st Jul 2025293 AMAQI
21st Jul 2025274 AMAQI
21st Jul 2025275 AMAQI
23°C21/26°C
21st Jul 2025326 AMAQI
21st Jul 2025327 AMAQI
21st Jul 2025358 AMAQI
21st Jul 2025389 AMAQI
21st Jul 20254410 AMAQI
21st Jul 20254711 AMAQI
21st Jul 20254812 PMAQI
21st Jul 2025521 PMAQI
21st Jul 2025522 PMAQI
21st Jul 2025523 PMAQI
21st Jul 2025534 PMAQI
21st Jul 2025545 PMAQI
21st Jul 2025566 PMAQI
21st Jul 2025417 PMAQI
21st Jul 2025378 PMAQI
21st Jul 2025439 PMAQI
21st Jul 20254110 PMAQI
21st Jul 20254311 PMAQI
22nd Jul 20254212 AMAQI
22nd Jul 2025411 AMAQI
22nd Jul 2025642 AMAQI
22nd Jul 2025643 AMAQI
22nd Jul 2025634 AMAQI
22nd Jul 2025615 AMAQI
21°C17/25°C
22nd Jul 2025606 AMAQI
22nd Jul 2025587 AMAQI
22nd Jul 2025568 AMAQI
22nd Jul 2025559 AMAQI
22nd Jul 20255610 AMAQI
22nd Jul 20255411 AMAQI
22nd Jul 20255512 PMAQI
22nd Jul 2025561 PMAQI
22nd Jul 2025562 PMAQI
22nd Jul 2025563 PMAQI
22nd Jul 2025564 PMAQI
22nd Jul 2025575 PMAQI
22nd Jul 2025556 PMAQI
22nd Jul 2025557 PMAQI
22nd Jul 2025578 PMAQI
22nd Jul 2025569 PMAQI
22nd Jul 20255510 PMAQI
22nd Jul 20255511 PMAQI
23rd Jul 20255412 AMAQI
23rd Jul 2025521 AMAQI
23rd Jul 2025462 AMAQI
23rd Jul 2025513 AMAQI
23rd Jul 2025494 AMAQI
23rd Jul 2025505 AMAQI
19°C11/25°C
23rd Jul 2025516 AMAQI
23rd Jul 2025527 AMAQI
23rd Jul 2025528 AMAQI
23rd Jul 2025529 AMAQI
23rd Jul 20255110 AMAQI
23rd Jul 20255211 AMAQI
23rd Jul 20255212 PMAQI
23rd Jul 2025531 PMAQI
23rd Jul 2025552 PMAQI
23rd Jul 2025533 PMAQI
23rd Jul 2025534 PMAQI
23rd Jul 2025535 PMAQI
23rd Jul 2025546 PMAQI
23rd Jul 2025527 PMAQI
23rd Jul 2025528 PMAQI
23rd Jul 2025529 PMAQI
23rd Jul 20255310 PMAQI
23rd Jul 20255311 PMAQI
24th Jul 20255312 AMAQI
24th Jul 2025531 AMAQI
24th Jul 2025552 AMAQI
24th Jul 2025543 AMAQI
24th Jul 2025544 AMAQI
24th Jul 2025545 AMAQI
22°C18/27°C
24th Jul 2025556 AMAQI
24th Jul 2025547 AMAQI
24th Jul 2025548 AMAQI
24th Jul 2025549 AMAQI
24th Jul 20255410 AMAQI
24th Jul 20255411 AMAQI
24th Jul 20255412 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025552 PMAQI
24th Jul 2025553 PMAQI
24th Jul 2025554 PMAQI
24th Jul 2025555 PMAQI
24th Jul 2025566 PMAQI
24th Jul 2025547 PMAQI
24th Jul 2025548 PMAQI
24th Jul 2025549 PMAQI
24th Jul 20255410 PMAQI
24th Jul 20255511 PMAQI
25th Jul 20255412 AMAQI
25th Jul 2025541 AMAQI
25th Jul 2025542 AMAQI
25th Jul 2025543 AMAQI
25th Jul 2025544 AMAQI
25th Jul 2025535 AMAQI
25°C19/31°C
25th Jul 2025546 AMAQI
25th Jul 2025537 AMAQI
25th Jul 2025548 AMAQI
25th Jul 2025539 AMAQI
25th Jul 20255210 AMAQI
25th Jul 20255211 AMAQI
25th Jul 20255312 PMAQI
25th Jul 2025541 PMAQI
25th Jul 2025542 PMAQI
25th Jul 2025543 PMAQI
25th Jul 2025544 PMAQI
25th Jul 2025535 PMAQI
25th Jul 2025526 PMAQI
25th Jul 2025537 PMAQI
25th Jul 2025538 PMAQI
25th Jul 2025529 PMAQI
25th Jul 20255210 PMAQI
25th Jul 20255411 PMAQI
26th Jul 20255512 AMAQI
26th Jul 2025521 AMAQI
26th Jul 2025492 AMAQI
26th Jul 2025483 AMAQI
26th Jul 2025484 AMAQI
26th Jul 2025515 AMAQI
25°C22/31°C
26th Jul 2025516 AMAQI
26th Jul 2025507 AMAQI
26th Jul 2025508 AMAQI
26th Jul 2025519 AMAQI
26th Jul 20255010 AMAQI
26th Jul 20255211 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025501 PMAQI
26th Jul 2025502 PMAQI
26th Jul 2025503 PMAQI
26th Jul 2025504 PMAQI
26th Jul 2025485 PMAQI
26th Jul 2025486 PMAQI
26th Jul 2025487 PMAQI
26th Jul 2025508 PMAQI
26th Jul 2025499 PMAQI
26th Jul 20255010 PMAQI
26th Jul 20255011 PMAQI
27th Jul 20254812 AMAQI
27th Jul 2025481 AMAQI
27th Jul 2025522 AMAQI
27th Jul 2025483 AMAQI
27th Jul 2025504 AMAQI
27th Jul 2025485 AMAQI
25°C21/31°C
27th Jul 2025506 AMAQI
27th Jul 2025487 AMAQI
27th Jul 2025498 AMAQI
27th Jul 2025499 AMAQI
27th Jul 20255010 AMAQI
27th Jul 20254911 AMAQI
27th Jul 20254712 PMAQI
27th Jul 2025441 PMAQI
27th Jul 2025472 PMAQI
27th Jul 2025443 PMAQI
27th Jul 2025394 PMAQI
27th Jul 2025415 PMAQI
27th Jul 2025406 PMAQI
27th Jul 2025467 PMAQI
27th Jul 2025468 PMAQI
27th Jul 2025439 PMAQI
27th Jul 20254410 PMAQI
27th Jul 20254511 PMAQI
28th Jul 20254712 AMAQI
28th Jul 2025471 AMAQI
28th Jul 2025452 AMAQI
28th Jul 2025463 AMAQI
28th Jul 2025474 AMAQI
28th Jul 2025465 AMAQI
23°C20/27°C
28th Jul 2025466 AMAQI
28th Jul 2025477 AMAQI
28th Jul 2025468 AMAQI
28th Jul 2025479 AMAQI
28th Jul 20254910 AMAQI
28th Jul 20254711 AMAQI
28th Jul 20254912 PMAQI
28th Jul 2025471 PMAQI
28th Jul 2025492 PMAQI
28th Jul 2025443 PMAQI
28th Jul 2025464 PMAQI
28th Jul 2025445 PMAQI
28th Jul 2025466 PMAQI
28th Jul 2025487 PMAQI
28th Jul 2025468 PMAQI
28th Jul 2025449 PMAQI
28th Jul 20254810 PMAQI
28th Jul 20254611 PMAQI
29th Jul 20255012 AMAQI
29th Jul 2025501 AMAQI
29th Jul 2025502 AMAQI
29th Jul 2025513 AMAQI
29th Jul 2025514 AMAQI
29th Jul 2025515 AMAQI
25°C22/29°C
29th Jul 2025506 AMAQI
29th Jul 2025527 AMAQI
29th Jul 2025508 AMAQI
29th Jul 2025529 AMAQI
29th Jul 20255310 AMAQI
29th Jul 20255211 AMAQI
29th Jul 20255212 PMAQI
29th Jul 2025511 PMAQI
29th Jul 2025502 PMAQI
29th Jul 2025503 PMAQI
29th Jul 2025514 PMAQI
29th Jul 2025505 PMAQI
29th Jul 2025506 PMAQI
29th Jul 2025527 PMAQI
29th Jul 2025508 PMAQI
29th Jul 2025519 PMAQI
29th Jul 20255110 PMAQI
29th Jul 20255111 PMAQI
30th Jul 20255012 AMAQI
30th Jul 2025511 AMAQI
30th Jul 2025502 AMAQI
30th Jul 2025503 AMAQI
30th Jul 2025524 AMAQI
30th Jul 2025525 AMAQI
24°C17/32°C
30th Jul 2025506 AMAQI
30th Jul 2025517 AMAQI
30th Jul 2025528 AMAQI
30th Jul 2025529 AMAQI
30th Jul 20255210 AMAQI
30th Jul 20255211 AMAQI
30th Jul 20255212 PMAQI
30th Jul 2025521 PMAQI
30th Jul 2025512 PMAQI
30th Jul 2025513 PMAQI
30th Jul 2025514 PMAQI
30th Jul 2025515 PMAQI
30th Jul 2025516 PMAQI
30th Jul 2025517 PMAQI
30th Jul 2025518 PMAQI
30th Jul 2025519 PMAQI
30th Jul 20255210 PMAQI
30th Jul 20255211 PMAQI
31st Jul 20255212 AMAQI
31st Jul 2025511 AMAQI
31st Jul 2025492 AMAQI
31st Jul 2025503 AMAQI
31st Jul 2025484 AMAQI
31st Jul 2025525 AMAQI
25°C19/32°C
31st Jul 2025536 AMAQI
31st Jul 2025557 AMAQI
31st Jul 2025558 AMAQI
31st Jul 2025569 AMAQI
31st Jul 20255510 AMAQI
31st Jul 20255711 AMAQI
31st Jul 20255612 PMAQI
31st Jul 2025561 PMAQI
31st Jul 2025562 PMAQI
31st Jul 2025553 PMAQI
31st Jul 2025564 PMAQI
31st Jul 2025585 PMAQI
31st Jul 2025576 PMAQI
31st Jul 2025547 PMAQI
31st Jul 2025568 PMAQI
31st Jul 2025579 PMAQI
31st Jul 20255610 PMAQI
31st Jul 20255611 PMAQI
1st Aug 20255712 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025582 AMAQI
1st Aug 2025583 AMAQI
1st Aug 2025584 AMAQI
1st Aug 2025565 AMAQI
21°C14/28°C
1st Aug 2025586 AMAQI
1st Aug 2025587 AMAQI
1st Aug 2025588 AMAQI
1st Aug 2025569 AMAQI
1st Aug 20255510 AMAQI
1st Aug 20255611 AMAQI
1st Aug 20255512 PMAQI
1st Aug 2025541 PMAQI
1st Aug 2025572 PMAQI
1st Aug 2025533 PMAQI
1st Aug 2025544 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025546 PMAQI
1st Aug 2025597 PMAQI
1st Aug 2025528 PMAQI
1st Aug 2025479 PMAQI
1st Aug 20254210 PMAQI
1st Aug 20254211 PMAQI
2nd Aug 20253812 AMAQI
2nd Aug 2025381 AMAQI
2nd Aug 2025352 AMAQI
2nd Aug 2025333 AMAQI
2nd Aug 2025324 AMAQI
2nd Aug 2025305 AMAQI
18°C14/22°C
2nd Aug 2025286 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025248 AMAQI
2nd Aug 2025249 AMAQI
2nd Aug 20252210 AMAQI
2nd Aug 20252111 AMAQI
2nd Aug 20252212 PMAQI
2nd Aug 2025221 PMAQI
2nd Aug 2025242 PMAQI
2nd Aug 2025243 PMAQI
2nd Aug 2025224 PMAQI
2nd Aug 2025235 PMAQI
2nd Aug 2025246 PMAQI
2nd Aug 2025267 PMAQI
2nd Aug 2025268 PMAQI
2nd Aug 2025309 PMAQI
2nd Aug 20253310 PMAQI
2nd Aug 20253211 PMAQI
3rd Aug 20253712 AMAQI
3rd Aug 2025381 AMAQI
3rd Aug 2025352 AMAQI
3rd Aug 2025353 AMAQI
3rd Aug 2025364 AMAQI
3rd Aug 2025335 AMAQI
18°C9/24°C
3rd Aug 2025346 AMAQI
3rd Aug 2025347 AMAQI
3rd Aug 2025328 AMAQI
3rd Aug 2025329 AMAQI
3rd Aug 20253610 AMAQI
3rd Aug 20254211 AMAQI
3rd Aug 20254612 PMAQI
3rd Aug 2025501 PMAQI
3rd Aug 2025522 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025464 PMAQI
3rd Aug 2025555 PMAQI
3rd Aug 2025546 PMAQI
3rd Aug 2025337 PMAQI
3rd Aug 2025458 PMAQI
3rd Aug 2025559 PMAQI
3rd Aug 20255410 PMAQI
3rd Aug 20255411 PMAQI
4th Aug 20255312 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025522 AMAQI
4th Aug 2025553 AMAQI
4th Aug 2025544 AMAQI
4th Aug 2025545 AMAQI
17°C6/26°C
4th Aug 2025556 AMAQI
4th Aug 2025557 AMAQI
4th Aug 2025558 AMAQI
4th Aug 2025569 AMAQI
4th Aug 20255410 AMAQI
4th Aug 20255411 AMAQI
4th Aug 20255512 PMAQI
4th Aug 2025561 PMAQI
4th Aug 2025572 PMAQI
4th Aug 2025563 PMAQI
4th Aug 2025594 PMAQI
4th Aug 2025595 PMAQI
4th Aug 2025596 PMAQI
4th Aug 2025547 PMAQI
4th Aug 2025558 PMAQI
4th Aug 2025599 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20255711 PMAQI
5th Aug 20255812 AMAQI
5th Aug 2025561 AMAQI
5th Aug 2025552 AMAQI
5th Aug 2025563 AMAQI
5th Aug 2025584 AMAQI
5th Aug 2025565 AMAQI
19°C8/28°C
5th Aug 2025576 AMAQI
5th Aug 2025587 AMAQI
5th Aug 2025588 AMAQI
5th Aug 2025609 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20256111 AMAQI
5th Aug 20256212 PMAQI
5th Aug 2025641 PMAQI
5th Aug 2025662 PMAQI
5th Aug 2025683 PMAQI
5th Aug 2025744 PMAQI
5th Aug 2025705 PMAQI
5th Aug 2025726 PMAQI
5th Aug 2025587 PMAQI
5th Aug 2025668 PMAQI
5th Aug 2025739 PMAQI
5th Aug 20257410 PMAQI
5th Aug 20257611 PMAQI
6th Aug 20257512 AMAQI
6th Aug 2025781 AMAQI
6th Aug 2025782 AMAQI
6th Aug 2025783 AMAQI
6th Aug 2025764 AMAQI
6th Aug 2025755 AMAQI
20°C13/26°C
6th Aug 2025766 AMAQI
6th Aug 2025787 AMAQI
6th Aug 2025798 AMAQI
6th Aug 2025799 AMAQI
6th Aug 20257810 AMAQI
6th Aug 20257511 AMAQI
6th Aug 20257512 PMAQI
6th Aug 2025781 PMAQI
6th Aug 2025762 PMAQI
6th Aug 2025753 PMAQI
6th Aug 2025754 PMAQI
6th Aug 2025735 PMAQI
6th Aug 2025726 PMAQI
6th Aug 2025747 PMAQI
6th Aug 2025728 PMAQI
6th Aug 2025669 PMAQI
6th Aug 20256610 PMAQI
6th Aug 20256511 PMAQI
7th Aug 20256612 AMAQI
7th Aug 2025661 AMAQI
7th Aug 2025622 AMAQI
7th Aug 2025633 AMAQI
7th Aug 2025644 AMAQI
7th Aug 2025665 AMAQI
19°C16/24°C
7th Aug 2025666 AMAQI
7th Aug 2025667 AMAQI
7th Aug 2025668 AMAQI
7th Aug 2025709 AMAQI
7th Aug 20257110 AMAQI
7th Aug 20257111 AMAQI
7th Aug 20257112 PMAQI
7th Aug 2025721 PMAQI
7th Aug 2025742 PMAQI
7th Aug 2025723 PMAQI
7th Aug 2025724 PMAQI
7th Aug 2025765 PMAQI
7th Aug 2025766 PMAQI
7th Aug 2025727 PMAQI
7th Aug 2025728 PMAQI
7th Aug 2025759 PMAQI
7th Aug 20257210 PMAQI
7th Aug 20257411 PMAQI
8th Aug 20257212 AMAQI
8th Aug 2025781 AMAQI
8th Aug 2025812 AMAQI
8th Aug 2025793 AMAQI
8th Aug 2025804 AMAQI
8th Aug 2025795 AMAQI
21°C16/28°C
8th Aug 2025786 AMAQI
8th Aug 2025787 AMAQI
8th Aug 2025798 AMAQI
8th Aug 2025789 AMAQI
8th Aug 20257610 AMAQI
8th Aug 20257411 AMAQI
8th Aug 20257412 PMAQI
8th Aug 2025741 PMAQI
8th Aug 2025712 PMAQI
8th Aug 2025763 PMAQI
8th Aug 2025744 PMAQI
8th Aug 2025735 PMAQI
8th Aug 2025726 PMAQI
8th Aug 2025777 PMAQI
8th Aug 2025758 PMAQI
8th Aug 2025719 PMAQI
8th Aug 20257210 PMAQI
8th Aug 20256911 PMAQI
9th Aug 20256812 AMAQI
9th Aug 2025671 AMAQI
9th Aug 2025602 AMAQI
9th Aug 2025603 AMAQI
9th Aug 2025574 AMAQI
9th Aug 2025565 AMAQI
21°C13/28°C
9th Aug 2025566 AMAQI
9th Aug 2025567 AMAQI
9th Aug 2025568 AMAQI
9th Aug 2025569 AMAQI
9th Aug 20255610 AMAQI
9th Aug 20255611 AMAQI
9th Aug 20255612 PMAQI
9th Aug 2025581 PMAQI
9th Aug 2025602 PMAQI
9th Aug 2025613 PMAQI
9th Aug 2025624 PMAQI
9th Aug 2025615 PMAQI
9th Aug 2025606 PMAQI
9th Aug 2025607 PMAQI
9th Aug 2025608 PMAQI
9th Aug 2025609 PMAQI
9th Aug 20256110 PMAQI
9th Aug 20256011 PMAQI
10th Aug 20255812 AMAQI
10th Aug 2025561 AMAQI
10th Aug 2025532 AMAQI
10th Aug 2025503 AMAQI
10th Aug 2025484 AMAQI
10th Aug 2025475 AMAQI
20°C11/29°C
10th Aug 2025436 AMAQI
10th Aug 2025457 AMAQI
10th Aug 2025448 AMAQI
10th Aug 2025439 AMAQI
10th Aug 20254710 AMAQI
10th Aug 20254811 AMAQI
10th Aug 20255012 PMAQI
10th Aug 2025511 PMAQI
10th Aug 2025512 PMAQI
10th Aug 2025523 PMAQI
10th Aug 2025524 PMAQI
10th Aug 2025515 PMAQI
10th Aug 2025516 PMAQI
10th Aug 2025527 PMAQI
10th Aug 2025528 PMAQI
10th Aug 2025529 PMAQI
10th Aug 20255210 PMAQI
10th Aug 20255211 PMAQI
11th Aug 20255112 AMAQI
11th Aug 2025461 AMAQI
11th Aug 2025422 AMAQI
11th Aug 2025423 AMAQI
11th Aug 2025424 AMAQI
11th Aug 2025415 AMAQI
21°C11/30°C
11th Aug 2025426 AMAQI
11th Aug 2025427 AMAQI
11th Aug 2025428 AMAQI
11th Aug 2025439 AMAQI
11th Aug 20254610 AMAQI
11th Aug 20254811 AMAQI
11th Aug 20254612 PMAQI
11th Aug 2025481 PMAQI
11th Aug 2025502 PMAQI
11th Aug 2025513 PMAQI
11th Aug 2025514 PMAQI
11th Aug 2025525 PMAQI
11th Aug 2025516 PMAQI
11th Aug 2025507 PMAQI
11th Aug 2025498 PMAQI
11th Aug 2025479 PMAQI
11th Aug 20254610 PMAQI
11th Aug 20254811 PMAQI
12th Aug 20254712 AMAQI
12th Aug 2025461 AMAQI
12th Aug 2025462 AMAQI
12th Aug 2025473 AMAQI
12th Aug 2025444 AMAQI
12th Aug 2025425 AMAQI
23°C17/29°C
12th Aug 2025446 AMAQI
12th Aug 2025467 AMAQI
12th Aug 2025468 AMAQI
12th Aug 2025439 AMAQI
12th Aug 20254210 AMAQI
12th Aug 20253911 AMAQI
12th Aug 20253812 PMAQI
12th Aug 2025371 PMAQI
12th Aug 2025402 PMAQI
12th Aug 2025363 PMAQI
12th Aug 2025374 PMAQI
12th Aug 2025385 PMAQI
12th Aug 2025356 PMAQI
12th Aug 2025437 PMAQI
12th Aug 2025388 PMAQI
12th Aug 2025329 PMAQI
12th Aug 20253210 PMAQI
12th Aug 20253411 PMAQI
13th Aug 20253312 AMAQI
13th Aug 2025301 AMAQI
13th Aug 2025292 AMAQI
13th Aug 2025303 AMAQI
13th Aug 2025284 AMAQI
13th Aug 2025265 AMAQI
23°C16/30°C
13th Aug 2025246 AMAQI
13th Aug 2025257 AMAQI
13th Aug 2025268 AMAQI
13th Aug 2025269 AMAQI
13th Aug 20252810 AMAQI
13th Aug 20253111 AMAQI
13th Aug 20253112 PMAQI
13th Aug 2025341 PMAQI
13th Aug 2025322 PMAQI
13th Aug 2025323 PMAQI
13th Aug 2025284 PMAQI
13th Aug 2025265 PMAQI
13th Aug 2025266 PMAQI
13th Aug 2025287 PMAQI
13th Aug 2025278 PMAQI
13th Aug 2025279 PMAQI
13th Aug 20252710 PMAQI
13th Aug 20252711 PMAQI
14th Aug 20252712 AMAQI
14th Aug 2025281 AMAQI
14th Aug 2025282 AMAQI
14th Aug 2025333 AMAQI
14th Aug 2025304 AMAQI
14th Aug 2025365 AMAQI
23°C18/29°C
14th Aug 2025366 AMAQI
6 AM14th Aug 2025347 AMAQI
1 PM
8 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 8 PM
48AQI
15 hours / Day
450 hours / Month
Avg. Lowest Time
6 AM - 8 PM
48AQI
15 hours / Day
450 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 8 PM (Avg. 48), while the lowest AQI was between 6 AM to 8 PM (Avg. 48).
Night time
Avg. Highest Time
12 AM - 11 PM
48AQI
9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 11 PM
48AQI
9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 48), while the lowest AQI was between 12 AM to 11 PM (Avg. 48).
2025 Days Vs Air Quality
Johnstown, Pennsylvania, United States
2025
84%
189
16%
36
Total number of days with different AQI categories in last 226 days in 2025 (139 days remaining)
Good
189 DaysModerate
36 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 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
Johnstown, Pennsylvania, 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
20AQI
20AQI
2nd January 2025
21AQI
21AQI
3rd January 2025
27AQI
27AQI
4th January 2025
22AQI
22AQI
5th January 2025
31AQI
31AQI
6th January 2025
30AQI
30AQI
7th January 2025
22AQI
22AQI
8th January 2025
27AQI
27AQI
9th January 2025
28AQI
28AQI
10th January 2025
47AQI
47AQI
11th January 2025
52AQI
52AQI
12th January 2025
51AQI
51AQI
13th January 2025
31AQI
31AQI
14th January 2025
25AQI
25AQI
15th January 2025
30AQI
30AQI
16th January 2025
38AQI
38AQI
17th January 2025
46AQI
46AQI
18th January 2025
60AQI
60AQI
19th January 2025
24AQI
24AQI
20th January 2025
25AQI
25AQI
21st January 2025
35AQI
35AQI
22nd January 2025
43AQI
43AQI
23rd January 2025
50AQI
50AQI
24th January 2025
38AQI
38AQI
25th January 2025
44AQI
44AQI
26th January 2025
30AQI
30AQI
27th January 2025
31AQI
31AQI
28th January 2025
30AQI
30AQI
29th January 2025
28AQI
28AQI
30th January 2025
33AQI
33AQI
31st January 2025
39AQI
39AQI
1st February 2025
25AQI
25AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
49AQI
49AQI
4th February 2025
32AQI
32AQI
5th February 2025
23AQI
23AQI
6th February 2025
24AQI
24AQI
7th February 2025
25AQI
25AQI
8th February 2025
31AQI
31AQI
9th February 2025
26AQI
26AQI
10th February 2025
29AQI
29AQI
11th February 2025
48AQI
48AQI
12th February 2025
39AQI
39AQI
13th February 2025
24AQI
24AQI
14th February 2025
29AQI
29AQI
15th February 2025
32AQI
32AQI
16th February 2025
25AQI
25AQI
17th February 2025
29AQI
29AQI
18th February 2025
25AQI
25AQI
19th February 2025
30AQI
30AQI
20th February 2025
30AQI
30AQI
21st February 2025
27AQI
27AQI
22nd February 2025
37AQI
37AQI
23rd February 2025
38AQI
38AQI
24th February 2025
47AQI
47AQI
25th February 2025
36AQI
36AQI
26th February 2025
44AQI
44AQI
27th February 2025
40AQI
40AQI
28th February 2025
26AQI
26AQI
1st March 2025
28AQI
28AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
33AQI
33AQI
4th March 2025
42AQI
42AQI
5th March 2025
31AQI
31AQI
6th March 2025
23AQI
23AQI
7th March 2025
30AQI
30AQI
8th March 2025
31AQI
31AQI
9th March 2025
28AQI
28AQI
10th March 2025
33AQI
33AQI
11th March 2025
37AQI
37AQI
12th March 2025
30AQI
30AQI
13th March 2025
40AQI
40AQI
14th March 2025
55AQI
55AQI
15th March 2025
54AQI
54AQI
16th March 2025
27AQI
27AQI
17th March 2025
17AQI
17AQI
18th March 2025
23AQI
23AQI
19th March 2025
29AQI
29AQI
20th March 2025
33AQI
33AQI
21st March 2025
16AQI
16AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
22AQI
22AQI
24th March 2025
19AQI
19AQI
25th March 2025
24AQI
24AQI
26th March 2025
20AQI
20AQI
27th March 2025
24AQI
24AQI
28th March 2025
38AQI
38AQI
29th March 2025
56AQI
56AQI
30th March 2025
53AQI
53AQI
31st March 2025
28AQI
28AQI
1st April 2025
19AQI
19AQI
2nd April 2025
31AQI
31AQI
3rd April 2025
25AQI
25AQI
4th April 2025
22AQI
22AQI
5th April 2025
28AQI
28AQI
6th April 2025
15AQI
15AQI
7th April 2025
20AQI
20AQI
8th April 2025
14AQI
14AQI
9th April 2025
23AQI
23AQI
10th April 2025
28AQI
28AQI
11th April 2025
32AQI
32AQI
12th April 2025
22AQI
22AQI
13th April 2025
22AQI
22AQI
14th April 2025
34AQI
34AQI
15th April 2025
23AQI
23AQI
16th April 2025
14AQI
14AQI
17th April 2025
22AQI
22AQI
18th April 2025
35AQI
35AQI
19th April 2025
51AQI
51AQI
20th April 2025
21AQI
21AQI
21st April 2025
34AQI
34AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
26AQI
26AQI
24th April 2025
32AQI
32AQI
25th April 2025
46AQI
46AQI
26th April 2025
20AQI
20AQI
27th April 2025
13AQI
13AQI
28th April 2025
18AQI
18AQI
29th April 2025
31AQI
31AQI
30th April 2025
20AQI
20AQI
1st May 2025
25AQI
25AQI
2nd May 2025
25AQI
25AQI
3rd May 2025
20AQI
20AQI
4th May 2025
19AQI
19AQI
5th May 2025
22AQI
22AQI
6th May 2025
17AQI
17AQI
7th May 2025
19AQI
19AQI
8th May 2025
27AQI
27AQI
9th May 2025
18AQI
18AQI
10th May 2025
24AQI
24AQI
11th May 2025
37AQI
37AQI
12th May 2025
36AQI
36AQI
13th May 2025
18AQI
18AQI
14th May 2025
17AQI
17AQI
15th May 2025
23AQI
23AQI
16th May 2025
41AQI
41AQI
17th May 2025
28AQI
28AQI
18th May 2025
16AQI
16AQI
19th May 2025
20AQI
20AQI
20th May 2025
21AQI
21AQI
21st May 2025
18AQI
18AQI
22nd May 2025
12AQI
12AQI
23rd May 2025
12AQI
12AQI
24th May 2025
12AQI
12AQI
25th May 2025
18AQI
18AQI
26th May 2025
23AQI
23AQI
27th May 2025
21AQI
21AQI
28th May 2025
13AQI
13AQI
29th May 2025
18AQI
18AQI
30th May 2025
27AQI
27AQI
31st May 2025
30AQI
30AQI
1st June 2025
19AQI
19AQI
2nd June 2025
25AQI
25AQI
3rd June 2025
35AQI
35AQI
4th June 2025
59AQI
59AQI
5th June 2025
67AQI
67AQI
6th June 2025
51AQI
51AQI
7th June 2025
46AQI
46AQI
8th June 2025
49AQI
49AQI
9th June 2025
44AQI
44AQI
10th June 2025
44AQI
44AQI
11th June 2025
56AQI
56AQI
12th June 2025
63AQI
63AQI
13th June 2025
69AQI
69AQI
14th June 2025
61AQI
61AQI
15th June 2025
40AQI
40AQI
16th June 2025
20AQI
20AQI
17th June 2025
20AQI
20AQI
18th June 2025
25AQI
25AQI
19th June 2025
27AQI
27AQI
20th June 2025
27AQI
27AQI
21st June 2025
39AQI
39AQI
22nd June 2025
43AQI
43AQI
23rd June 2025
55AQI
55AQI
24th June 2025
56AQI
56AQI
25th June 2025
57AQI
57AQI
26th June 2025
46AQI
46AQI
27th June 2025
33AQI
33AQI
28th June 2025
27AQI
27AQI
29th June 2025
34AQI
34AQI
30th June 2025
40AQI
40AQI
1st July 2025
33AQI
33AQI
2nd July 2025
32AQI
32AQI
3rd July 2025
45AQI
45AQI
4th July 2025
58AQI
58AQI
5th July 2025
64AQI
64AQI
6th July 2025
58AQI
58AQI
7th July 2025
50AQI
50AQI
8th July 2025
33AQI
33AQI
9th July 2025
41AQI
41AQI
10th July 2025
43AQI
43AQI
11th July 2025
51AQI
51AQI
12th July 2025
49AQI
49AQI
13th July 2025
39AQI
39AQI
14th July 2025
34AQI
34AQI
15th July 2025
39AQI
39AQI
16th July 2025
39AQI
39AQI
17th July 2025
27AQI
27AQI
18th July 2025
28AQI
28AQI
19th July 2025
34AQI
34AQI
20th July 2025
34AQI
34AQI
21st July 2025
40AQI
40AQI
22nd July 2025
56AQI
56AQI
23rd July 2025
52AQI
52AQI
24th July 2025
54AQI
54AQI
25th July 2025
53AQI
53AQI
26th July 2025
50AQI
50AQI
27th July 2025
47AQI
47AQI
28th July 2025
46AQI
46AQI
29th July 2025
51AQI
51AQI
30th July 2025
51AQI
51AQI
31st July 2025
54AQI
54AQI
1st August 2025
54AQI
54AQI
2nd August 2025
28AQI
28AQI
3rd August 2025
42AQI
42AQI
4th August 2025
55AQI
55AQI
5th August 2025
63AQI
63AQI
6th August 2025
74AQI
74AQI
7th August 2025
70AQI
70AQI
8th August 2025
75AQI
75AQI
9th August 2025
59AQI
59AQI
10th August 2025
50AQI
50AQI
11th August 2025
46AQI
46AQI
12th August 2025
41AQI
41AQI
13th August 2025
29AQI
29AQI
34AQI
32AQI
31AQI
25AQI
22AQI
43AQI
45AQI
53AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202534AQI
28
3
28
27
4
29
1
31
20
10
20
11
6
7
189
36
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
May22AQI
202432AQI
26
5
21
8
30
1
30
31
25
4
31
28
3
30
30
1
30
29
2
341
24
Highest AQI recorded in
February39AQI
Lowest AQI recorded in
September26AQI
202339AQI
25
6
22
6
30
1
27
3
25
6
14
12
3
1
23
8
24
7
27
1
31
24
5
24
7
296
62
3
1
Highest AQI recorded in
June63AQI
Lowest AQI recorded in
October26AQI
202242AQI
22
7
11
8
22
8
12
5
22
8
14
13
11
11
1
25
4
30
1
25
5
23
8
218
78
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
September34AQI
202141AQI
20
7
15
7
12
4
20
4
25
6
26
4
16
13
1
20
11
28
2
31
21
9
24
7
258
74
1
Highest AQI recorded in
July53AQI
Lowest AQI recorded in
October31AQI
202037AQI
13
19
1
18
30
28
3
29
2
29
1
29
1
21
7
26
5
242
20
Highest AQI recorded in
November45AQI
Lowest AQI recorded in
March30AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2022(Avg.)
42AQILeast Polluted Year Recorded
2024(Avg.)
32AQIJohnstown's annual 2025 AQI (34) shows an average percentage change of -9.5% (improved AQI) compared to previous years: 2020 (37), 2021 (41), 2022 (42), 2023 (39), 2024 (32).
