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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

San Juan, Puerto Rico, 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

San Juan, Puerto Rico, United States

2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
11th Aug 2026
100AQI
Lowest AQI recorded on
8th Aug 2023
6AQI

Same Day Analysis (17th August):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 50 of Good air quality on the same day.

Day & Night AQI Trend: 16th Aug - 17th Aug 2026

San Juan, Puerto Rico, United States

AQI
Day
Night
.

6 AM16th Aug 2026

6 PM

5 AM17th Aug 2026

Day time
Avg. Highest Time
1PM16th Aug

69AQI

Avg. Lowest Time
2PM16th Aug

30AQI

Night time
Avg. Highest Time
9PM16th Aug

67AQI

Avg. Lowest Time
11PM16th Aug

52AQI

In the last 24 hours,

San Juan's AQI reached its highest point of 69 at 1 PM during the Day, while the lowest point, 30, was recorded at 2 PM during the Day between 16th Aug and 17th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

San Juan, Puerto Rico, United States

JulAug
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th
Day
Night
19th Jul 2026406 AMAQI
19th Jul 2026457 AMAQI
19th Jul 2026448 AMAQI
19th Jul 2026469 AMAQI
19th Jul 20264710 AMAQI
19th Jul 20264611 AMAQI
19th Jul 20264512 PMAQI
19th Jul 2026481 PMAQI
19th Jul 2026502 PMAQI
19th Jul 2026503 PMAQI
19th Jul 2026504 PMAQI
19th Jul 2026515 PMAQI
19th Jul 2026486 PMAQI
19th Jul 2026517 PMAQI
19th Jul 2026498 PMAQI
19th Jul 2026499 PMAQI
19th Jul 20264610 PMAQI
19th Jul 20264211 PMAQI
20th Jul 20265212 AMAQI
20th Jul 2026481 AMAQI
20th Jul 2026452 AMAQI
20th Jul 2026423 AMAQI
20th Jul 2026444 AMAQI
20th Jul 2026435 AMAQI

27°C23/32°C

20th Jul 2026446 AMAQI
20th Jul 2026457 AMAQI
20th Jul 2026368 AMAQI
20th Jul 2026689 AMAQI
20th Jul 20263510 AMAQI
20th Jul 20263411 AMAQI
20th Jul 20264112 PMAQI
20th Jul 2026311 PMAQI
20th Jul 2026292 PMAQI
20th Jul 2026313 PMAQI
20th Jul 2026304 PMAQI
20th Jul 2026335 PMAQI
20th Jul 2026266 PMAQI
20th Jul 2026357 PMAQI
20th Jul 2026468 PMAQI
20th Jul 2026419 PMAQI
20th Jul 20264210 PMAQI
21st Jul 20264512 AMAQI
21st Jul 2026481 AMAQI
21st Jul 2026472 AMAQI
21st Jul 2026443 AMAQI
21st Jul 2026434 AMAQI
21st Jul 2026415 AMAQI

27°C24/31°C

21st Jul 2026396 AMAQI
21st Jul 2026427 AMAQI
21st Jul 2026418 AMAQI
21st Jul 2026419 AMAQI
21st Jul 20265110 AMAQI
21st Jul 20264711 AMAQI
21st Jul 20264312 PMAQI
21st Jul 2026441 PMAQI
21st Jul 2026512 PMAQI
21st Jul 2026573 PMAQI
21st Jul 2026424 PMAQI
21st Jul 2026475 PMAQI
21st Jul 2026496 PMAQI
21st Jul 2026477 PMAQI
21st Jul 2026328 PMAQI
21st Jul 2026609 PMAQI
21st Jul 20266010 PMAQI
21st Jul 20266011 PMAQI
22nd Jul 20265112 AMAQI
22nd Jul 2026561 AMAQI
22nd Jul 2026522 AMAQI
22nd Jul 2026543 AMAQI
22nd Jul 2026454 AMAQI
22nd Jul 2026435 AMAQI

27°C23/32°C

22nd Jul 2026446 AMAQI
22nd Jul 2026477 AMAQI
22nd Jul 2026508 AMAQI
22nd Jul 2026549 AMAQI
22nd Jul 20264810 AMAQI
22nd Jul 20265311 AMAQI
22nd Jul 20265212 PMAQI
22nd Jul 2026521 PMAQI
22nd Jul 2026522 PMAQI
22nd Jul 2026483 PMAQI
22nd Jul 2026424 PMAQI
22nd Jul 2026445 PMAQI
22nd Jul 2026396 PMAQI
22nd Jul 2026297 PMAQI
22nd Jul 2026398 PMAQI
22nd Jul 2026439 PMAQI
22nd Jul 20262710 PMAQI
22nd Jul 20265611 PMAQI
23rd Jul 20262512 AMAQI
23rd Jul 2026271 AMAQI
23rd Jul 2026402 AMAQI
23rd Jul 2026363 AMAQI
23rd Jul 2026324 AMAQI
23rd Jul 2026375 AMAQI

27°C24/31°C

23rd Jul 2026446 AMAQI
23rd Jul 2026327 AMAQI
23rd Jul 2026408 AMAQI
23rd Jul 2026349 AMAQI
23rd Jul 20264010 AMAQI
23rd Jul 20264611 AMAQI
23rd Jul 20264712 PMAQI
23rd Jul 2026511 PMAQI
23rd Jul 2026532 PMAQI
23rd Jul 2026523 PMAQI
23rd Jul 2026524 PMAQI
23rd Jul 2026525 PMAQI
23rd Jul 2026526 PMAQI
23rd Jul 2026487 PMAQI
23rd Jul 2026468 PMAQI
23rd Jul 2026469 PMAQI
23rd Jul 20263610 PMAQI
23rd Jul 20264611 PMAQI
24th Jul 20264712 AMAQI
24th Jul 2026461 AMAQI
24th Jul 2026492 AMAQI
24th Jul 2026573 AMAQI
24th Jul 2026574 AMAQI
24th Jul 2026415 AMAQI

27°C24/32°C

24th Jul 2026476 AMAQI
24th Jul 2026457 AMAQI
24th Jul 2026468 AMAQI
24th Jul 2026539 AMAQI
24th Jul 20265410 AMAQI
24th Jul 20265411 AMAQI
24th Jul 20265612 PMAQI
24th Jul 2026521 PMAQI
24th Jul 2026522 PMAQI
24th Jul 2026503 PMAQI
24th Jul 2026544 PMAQI
24th Jul 2026575 PMAQI
24th Jul 2026596 PMAQI
24th Jul 2026577 PMAQI
24th Jul 2026588 PMAQI
24th Jul 2026589 PMAQI
24th Jul 20265910 PMAQI
24th Jul 20264811 PMAQI
25th Jul 20265612 AMAQI
25th Jul 2026541 AMAQI
25th Jul 2026522 AMAQI
25th Jul 2026533 AMAQI
25th Jul 2026524 AMAQI
25th Jul 2026515 AMAQI

27°C23/32°C

25th Jul 2026506 AMAQI
25th Jul 2026477 AMAQI
25th Jul 2026488 AMAQI
25th Jul 2026419 AMAQI
25th Jul 20266610 AMAQI
25th Jul 20262911 AMAQI
25th Jul 20264712 PMAQI
25th Jul 2026431 PMAQI
25th Jul 2026572 PMAQI
25th Jul 2026633 PMAQI
25th Jul 2026524 PMAQI
25th Jul 2026535 PMAQI
25th Jul 2026476 PMAQI
25th Jul 2026497 PMAQI
25th Jul 2026468 PMAQI
25th Jul 2026679 PMAQI
25th Jul 20264310 PMAQI
25th Jul 20265211 PMAQI
26th Jul 20264812 AMAQI
26th Jul 2026521 AMAQI
26th Jul 2026542 AMAQI
26th Jul 2026563 AMAQI
26th Jul 2026584 AMAQI
26th Jul 2026575 AMAQI

27°C24/32°C

26th Jul 2026546 AMAQI
26th Jul 2026507 AMAQI
26th Jul 2026628 AMAQI
26th Jul 2026589 AMAQI
26th Jul 20265610 AMAQI
26th Jul 20265211 AMAQI
26th Jul 20265412 PMAQI
26th Jul 2026581 PMAQI
26th Jul 2026582 PMAQI
26th Jul 2026523 PMAQI
26th Jul 2026514 PMAQI
26th Jul 2026505 PMAQI
26th Jul 2026506 PMAQI
26th Jul 2026527 PMAQI
26th Jul 2026598 PMAQI
26th Jul 2026589 PMAQI
26th Jul 20264310 PMAQI
26th Jul 20265711 PMAQI
27th Jul 20265512 AMAQI
27th Jul 2026561 AMAQI
27th Jul 2026542 AMAQI
27th Jul 2026573 AMAQI
27th Jul 2026564 AMAQI
27th Jul 2026565 AMAQI

28°C24/32°C

27th Jul 2026526 AMAQI
27th Jul 2026547 AMAQI
27th Jul 2026488 AMAQI
27th Jul 2026499 AMAQI
27th Jul 20265310 AMAQI
27th Jul 20265811 AMAQI
27th Jul 20265612 PMAQI
27th Jul 2026551 PMAQI
27th Jul 2026442 PMAQI
27th Jul 2026443 PMAQI
27th Jul 2026494 PMAQI
27th Jul 2026415 PMAQI
27th Jul 2026216 PMAQI
27th Jul 2026317 PMAQI
27th Jul 2026348 PMAQI
27th Jul 2026399 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20264511 PMAQI
28th Jul 20264612 AMAQI
28th Jul 2026461 AMAQI
28th Jul 2026532 AMAQI
28th Jul 2026533 AMAQI
28th Jul 2026544 AMAQI
28th Jul 2026555 AMAQI

28°C24/32°C

28th Jul 2026586 AMAQI
28th Jul 2026607 AMAQI
28th Jul 2026588 AMAQI
28th Jul 2026629 AMAQI
28th Jul 20266510 AMAQI
28th Jul 20266511 AMAQI
28th Jul 20267012 PMAQI
28th Jul 2026701 PMAQI
28th Jul 2026512 PMAQI
28th Jul 2026563 PMAQI
28th Jul 2026584 PMAQI
28th Jul 2026585 PMAQI
28th Jul 2026666 PMAQI
28th Jul 2026807 PMAQI
28th Jul 2026758 PMAQI
28th Jul 2026719 PMAQI
28th Jul 20266910 PMAQI
28th Jul 20266611 PMAQI
29th Jul 20265912 AMAQI
29th Jul 2026461 AMAQI
29th Jul 2026612 AMAQI
29th Jul 2026623 AMAQI
29th Jul 2026614 AMAQI
29th Jul 2026625 AMAQI

28°C24/33°C

29th Jul 2026626 AMAQI
29th Jul 2026607 AMAQI
29th Jul 2026608 AMAQI
29th Jul 2026609 AMAQI
29th Jul 20265210 AMAQI
29th Jul 20264611 AMAQI
29th Jul 20264812 PMAQI
29th Jul 2026481 PMAQI
29th Jul 2026502 PMAQI
29th Jul 2026523 PMAQI
29th Jul 2026464 PMAQI
29th Jul 2026545 PMAQI
29th Jul 2026566 PMAQI
29th Jul 2026547 PMAQI
29th Jul 2026598 PMAQI
29th Jul 2026599 PMAQI
29th Jul 20264810 PMAQI
29th Jul 20265811 PMAQI
30th Jul 20265612 AMAQI
30th Jul 2026551 AMAQI
30th Jul 2026562 AMAQI
30th Jul 2026603 AMAQI
30th Jul 2026604 AMAQI
30th Jul 2026605 AMAQI

28°C25/31°C

30th Jul 2026586 AMAQI
30th Jul 2026587 AMAQI
30th Jul 2026578 AMAQI
30th Jul 2026559 AMAQI
30th Jul 20265210 AMAQI
30th Jul 20265011 AMAQI
30th Jul 20265212 PMAQI
30th Jul 2026521 PMAQI
30th Jul 2026442 PMAQI
30th Jul 2026483 PMAQI
30th Jul 2026504 PMAQI
30th Jul 2026485 PMAQI
30th Jul 2026496 PMAQI
30th Jul 2026547 PMAQI
30th Jul 2026548 PMAQI
30th Jul 2026589 PMAQI
30th Jul 20266110 PMAQI
30th Jul 20266211 PMAQI
31st Jul 20266612 AMAQI
31st Jul 2026641 AMAQI
31st Jul 2026582 AMAQI
31st Jul 2026603 AMAQI
31st Jul 2026594 AMAQI
31st Jul 2026615 AMAQI

28°C24/32°C

31st Jul 2026626 AMAQI
31st Jul 2026627 AMAQI
31st Jul 2026628 AMAQI
31st Jul 2026579 AMAQI
31st Jul 20265910 AMAQI
31st Jul 20265611 AMAQI
31st Jul 20264812 PMAQI
31st Jul 2026511 PMAQI
31st Jul 2026482 PMAQI
31st Jul 2026443 PMAQI
31st Jul 2026454 PMAQI
31st Jul 2026405 PMAQI
31st Jul 2026396 PMAQI
31st Jul 2026417 PMAQI
31st Jul 2026368 PMAQI
31st Jul 2026349 PMAQI
31st Jul 20263510 PMAQI
31st Jul 20264811 PMAQI
1st Aug 20263512 AMAQI
1st Aug 2026511 AMAQI
1st Aug 2026522 AMAQI
1st Aug 2026453 AMAQI
1st Aug 2026504 AMAQI
1st Aug 2026545 AMAQI

27°C24/31°C

1st Aug 2026386 AMAQI
1st Aug 2026407 AMAQI
1st Aug 2026468 AMAQI
1st Aug 2026449 AMAQI
1st Aug 20264110 AMAQI
1st Aug 20264111 AMAQI
1st Aug 20264112 PMAQI
1st Aug 2026441 PMAQI
1st Aug 2026272 PMAQI
1st Aug 2026433 PMAQI
1st Aug 2026434 PMAQI
1st Aug 2026415 PMAQI
1st Aug 2026416 PMAQI
1st Aug 2026467 PMAQI
1st Aug 2026398 PMAQI
1st Aug 2026339 PMAQI
1st Aug 20263810 PMAQI
1st Aug 20264011 PMAQI
2nd Aug 20265012 AMAQI
2nd Aug 2026461 AMAQI
2nd Aug 2026382 AMAQI
2nd Aug 2026363 AMAQI
2nd Aug 2026294 AMAQI
2nd Aug 2026335 AMAQI

27°C24/32°C

2nd Aug 2026366 AMAQI
2nd Aug 2026297 AMAQI
2nd Aug 2026298 AMAQI
2nd Aug 2026259 AMAQI
2nd Aug 20262610 AMAQI
2nd Aug 20262311 AMAQI
2nd Aug 20262312 PMAQI
2nd Aug 2026321 PMAQI
2nd Aug 2026362 PMAQI
2nd Aug 2026383 PMAQI
2nd Aug 2026474 PMAQI
2nd Aug 2026505 PMAQI
2nd Aug 2026506 PMAQI
2nd Aug 2026507 PMAQI
2nd Aug 2026528 PMAQI
2nd Aug 2026479 PMAQI
2nd Aug 20263710 PMAQI
2nd Aug 20265011 PMAQI
3rd Aug 20264812 AMAQI
3rd Aug 2026461 AMAQI
3rd Aug 2026472 AMAQI
3rd Aug 2026423 AMAQI
3rd Aug 2026444 AMAQI
3rd Aug 2026425 AMAQI

28°C25/31°C

3rd Aug 2026436 AMAQI
3rd Aug 2026527 AMAQI
3rd Aug 2026408 AMAQI
3rd Aug 2026399 AMAQI
3rd Aug 20264210 AMAQI
3rd Aug 20264411 AMAQI
3rd Aug 20264612 PMAQI
3rd Aug 2026481 PMAQI
3rd Aug 2026472 PMAQI
3rd Aug 2026473 PMAQI
3rd Aug 2026454 PMAQI
3rd Aug 2026435 PMAQI
3rd Aug 2026406 PMAQI
3rd Aug 2026487 PMAQI
3rd Aug 2026458 PMAQI
3rd Aug 2026439 PMAQI
3rd Aug 20263310 PMAQI
3rd Aug 20263111 PMAQI
4th Aug 20263612 AMAQI
4th Aug 2026251 AMAQI
4th Aug 2026382 AMAQI
4th Aug 2026243 AMAQI
4th Aug 2026294 AMAQI
4th Aug 2026275 AMAQI

28°C24/32°C

4th Aug 2026276 AMAQI
4th Aug 2026297 AMAQI
4th Aug 2026388 AMAQI
4th Aug 2026329 AMAQI
4th Aug 20266010 AMAQI
4th Aug 20265011 AMAQI
4th Aug 20262512 PMAQI
4th Aug 2026581 PMAQI
4th Aug 2026392 PMAQI
4th Aug 2026423 PMAQI
4th Aug 2026284 PMAQI
4th Aug 2026295 PMAQI
4th Aug 2026306 PMAQI
4th Aug 2026247 PMAQI
4th Aug 2026298 PMAQI
4th Aug 2026349 PMAQI
4th Aug 20263510 PMAQI
4th Aug 20264611 PMAQI
5th Aug 20264212 AMAQI
5th Aug 2026361 AMAQI
5th Aug 2026352 AMAQI
5th Aug 2026443 AMAQI
5th Aug 2026314 AMAQI
5th Aug 2026385 AMAQI

28°C24/32°C

5th Aug 2026466 AMAQI
5th Aug 2026337 AMAQI
5th Aug 2026398 AMAQI
5th Aug 2026379 AMAQI
5th Aug 20263110 AMAQI
5th Aug 20263211 AMAQI
5th Aug 20264012 PMAQI
5th Aug 2026321 PMAQI
5th Aug 2026382 PMAQI
5th Aug 2026523 PMAQI
5th Aug 2026484 PMAQI
5th Aug 2026305 PMAQI
5th Aug 2026256 PMAQI
5th Aug 2026367 PMAQI
5th Aug 2026258 PMAQI
5th Aug 2026339 PMAQI
5th Aug 20263610 PMAQI
5th Aug 20264011 PMAQI
6th Aug 20262712 AMAQI
6th Aug 2026251 AMAQI
6th Aug 2026212 AMAQI
6th Aug 2026363 AMAQI
6th Aug 2026404 AMAQI
6th Aug 2026355 AMAQI

28°C24/32°C

6th Aug 2026396 AMAQI
6th Aug 2026287 AMAQI
6th Aug 2026408 AMAQI
6th Aug 2026389 AMAQI
6th Aug 20262710 AMAQI
6th Aug 20264311 AMAQI
6th Aug 20263212 PMAQI
6th Aug 2026311 PMAQI
6th Aug 2026332 PMAQI
6th Aug 2026293 PMAQI
6th Aug 2026434 PMAQI
6th Aug 2026385 PMAQI
6th Aug 2026306 PMAQI
6th Aug 2026347 PMAQI
6th Aug 2026388 PMAQI
6th Aug 2026349 PMAQI
6th Aug 20263410 PMAQI
6th Aug 20264011 PMAQI
7th Aug 20262612 AMAQI
7th Aug 2026341 AMAQI
7th Aug 2026252 AMAQI
7th Aug 2026293 AMAQI
7th Aug 2026274 AMAQI
7th Aug 2026235 AMAQI

27°C24/32°C

7th Aug 2026256 AMAQI
7th Aug 2026287 AMAQI
7th Aug 2026368 AMAQI
7th Aug 2026359 AMAQI
7th Aug 20264610 AMAQI
7th Aug 20264211 AMAQI
7th Aug 20263212 PMAQI
7th Aug 2026431 PMAQI
7th Aug 2026442 PMAQI
7th Aug 2026493 PMAQI
7th Aug 2026524 PMAQI
7th Aug 2026565 PMAQI
7th Aug 2026586 PMAQI
7th Aug 2026577 PMAQI
7th Aug 2026438 PMAQI
7th Aug 2026459 PMAQI
7th Aug 20265110 PMAQI
7th Aug 20265711 PMAQI
8th Aug 20265512 AMAQI
8th Aug 2026581 AMAQI
8th Aug 2026612 AMAQI
8th Aug 2026613 AMAQI
8th Aug 2026634 AMAQI
8th Aug 2026605 AMAQI

27°C24/31°C

8th Aug 2026586 AMAQI
8th Aug 2026597 AMAQI
8th Aug 2026598 AMAQI
8th Aug 2026609 AMAQI
8th Aug 20266610 AMAQI
8th Aug 20266211 AMAQI
8th Aug 20266312 PMAQI
8th Aug 2026621 PMAQI
8th Aug 2026642 PMAQI
8th Aug 2026623 PMAQI
8th Aug 2026684 PMAQI
8th Aug 2026645 PMAQI
8th Aug 2026606 PMAQI
8th Aug 2026587 PMAQI
8th Aug 2026588 PMAQI
8th Aug 2026569 PMAQI
8th Aug 20265410 PMAQI
8th Aug 20265411 PMAQI
9th Aug 20265212 AMAQI
9th Aug 2026461 AMAQI
9th Aug 2026462 AMAQI
9th Aug 2026483 AMAQI
9th Aug 2026524 AMAQI
9th Aug 2026485 AMAQI

27°C23/32°C

9th Aug 2026486 AMAQI
9th Aug 2026537 AMAQI
9th Aug 2026538 AMAQI
9th Aug 2026519 AMAQI
9th Aug 20265510 AMAQI
9th Aug 20265411 AMAQI
9th Aug 20265412 PMAQI
9th Aug 2026541 PMAQI
9th Aug 2026562 PMAQI
9th Aug 2026553 PMAQI
9th Aug 2026564 PMAQI
9th Aug 2026575 PMAQI
9th Aug 2026666 PMAQI
9th Aug 2026537 PMAQI
9th Aug 2026628 PMAQI
9th Aug 2026649 PMAQI
9th Aug 20266210 PMAQI
9th Aug 20266611 PMAQI
10th Aug 20266612 AMAQI
10th Aug 2026661 AMAQI
10th Aug 2026682 AMAQI
10th Aug 2026723 AMAQI
10th Aug 2026754 AMAQI
10th Aug 2026775 AMAQI

28°C26/31°C

10th Aug 2026726 AMAQI
10th Aug 2026717 AMAQI
10th Aug 2026778 AMAQI
10th Aug 2026709 AMAQI
10th Aug 20267310 AMAQI
10th Aug 20268311 AMAQI
10th Aug 20268212 PMAQI
10th Aug 2026921 PMAQI
10th Aug 20261062 PMAQI
10th Aug 20261103 PMAQI
10th Aug 20261094 PMAQI
10th Aug 20261155 PMAQI
10th Aug 20261156 PMAQI
10th Aug 20261157 PMAQI
10th Aug 20261268 PMAQI
10th Aug 20261229 PMAQI
10th Aug 20269410 PMAQI
10th Aug 202612011 PMAQI
11th Aug 202611212 AMAQI
11th Aug 20261051 AMAQI
11th Aug 2026982 AMAQI
11th Aug 2026843 AMAQI
11th Aug 2026814 AMAQI
11th Aug 2026835 AMAQI

28°C24/32°C

11th Aug 2026856 AMAQI
11th Aug 2026817 AMAQI
11th Aug 2026848 AMAQI
11th Aug 2026869 AMAQI
11th Aug 20268910 AMAQI
11th Aug 20267611 AMAQI
11th Aug 20269612 PMAQI
11th Aug 20261161 PMAQI
11th Aug 20261182 PMAQI
11th Aug 20261213 PMAQI
11th Aug 20261184 PMAQI
11th Aug 20261255 PMAQI
11th Aug 20261186 PMAQI
11th Aug 20261167 PMAQI
11th Aug 20261098 PMAQI
11th Aug 20261109 PMAQI
11th Aug 20269010 PMAQI
11th Aug 20269911 PMAQI
12th Aug 202610612 AMAQI
12th Aug 20261201 AMAQI
12th Aug 20261272 AMAQI
12th Aug 2026823 AMAQI
12th Aug 2026794 AMAQI
12th Aug 2026625 AMAQI

27°C25/30°C

12th Aug 2026646 AMAQI
12th Aug 2026677 AMAQI
12th Aug 2026708 AMAQI
12th Aug 2026709 AMAQI
12th Aug 20267610 AMAQI
12th Aug 20267811 AMAQI
12th Aug 20267912 PMAQI
12th Aug 2026641 PMAQI
12th Aug 2026582 PMAQI
12th Aug 2026533 PMAQI
12th Aug 2026444 PMAQI
12th Aug 2026465 PMAQI
12th Aug 2026496 PMAQI
12th Aug 2026507 PMAQI
12th Aug 2026538 PMAQI
12th Aug 2026559 PMAQI
12th Aug 20265710 PMAQI
12th Aug 20266311 PMAQI
13th Aug 20266412 AMAQI
13th Aug 2026641 AMAQI
13th Aug 2026662 AMAQI
13th Aug 2026673 AMAQI
13th Aug 2026644 AMAQI
13th Aug 2026645 AMAQI

28°C25/31°C

13th Aug 2026646 AMAQI
13th Aug 2026637 AMAQI
13th Aug 2026668 AMAQI
13th Aug 2026649 AMAQI
13th Aug 20266610 AMAQI
13th Aug 20266811 AMAQI
13th Aug 20266812 PMAQI
13th Aug 2026541 PMAQI
13th Aug 2026682 PMAQI
13th Aug 2026733 PMAQI
13th Aug 2026804 PMAQI
13th Aug 2026785 PMAQI
13th Aug 2026766 PMAQI
13th Aug 2026737 PMAQI
13th Aug 2026718 PMAQI
13th Aug 2026759 PMAQI
13th Aug 20267410 PMAQI
13th Aug 20267811 PMAQI
14th Aug 20268012 AMAQI
14th Aug 2026781 AMAQI
14th Aug 2026822 AMAQI
14th Aug 2026803 AMAQI
14th Aug 2026774 AMAQI
14th Aug 2026805 AMAQI

28°C25/31°C

14th Aug 2026786 AMAQI
14th Aug 2026787 AMAQI
14th Aug 2026788 AMAQI
14th Aug 2026769 AMAQI
14th Aug 20267610 AMAQI
14th Aug 20267211 AMAQI
14th Aug 20267212 PMAQI
14th Aug 2026741 PMAQI
14th Aug 2026752 PMAQI
14th Aug 2026763 PMAQI
14th Aug 2026774 PMAQI
14th Aug 2026795 PMAQI
14th Aug 2026776 PMAQI
14th Aug 2026767 PMAQI
14th Aug 2026768 PMAQI
14th Aug 2026789 PMAQI
14th Aug 20267610 PMAQI
14th Aug 20267611 PMAQI
15th Aug 20266812 AMAQI
15th Aug 2026711 AMAQI
15th Aug 2026682 AMAQI
15th Aug 2026683 AMAQI
15th Aug 2026654 AMAQI
15th Aug 2026665 AMAQI

28°C26/32°C

15th Aug 2026626 AMAQI
15th Aug 2026647 AMAQI
15th Aug 2026668 AMAQI
15th Aug 2026629 AMAQI
15th Aug 20266510 AMAQI
15th Aug 20266811 AMAQI
15th Aug 20266612 PMAQI
15th Aug 2026671 PMAQI
15th Aug 2026692 PMAQI
15th Aug 2026673 PMAQI
15th Aug 2026714 PMAQI
15th Aug 2026685 PMAQI
15th Aug 2026586 PMAQI
15th Aug 2026587 PMAQI
15th Aug 2026518 PMAQI
15th Aug 2026569 PMAQI
15th Aug 20266310 PMAQI
15th Aug 20266411 PMAQI
16th Aug 20266412 AMAQI
16th Aug 2026641 AMAQI
16th Aug 2026562 AMAQI
16th Aug 2026543 AMAQI
16th Aug 2026634 AMAQI
16th Aug 2026585 AMAQI

28°C25/31°C

16th Aug 2026576 AMAQI
16th Aug 2026587 AMAQI
16th Aug 2026608 AMAQI
16th Aug 2026639 AMAQI
16th Aug 20265410 AMAQI
16th Aug 20265511 AMAQI
16th Aug 20264812 PMAQI
16th Aug 2026691 PMAQI
16th Aug 2026302 PMAQI
16th Aug 2026673 PMAQI
16th Aug 2026674 PMAQI
16th Aug 2026685 PMAQI
16th Aug 2026686 PMAQI
16th Aug 2026607 PMAQI
16th Aug 2026668 PMAQI
16th Aug 2026679 PMAQI
16th Aug 20266410 PMAQI
16th Aug 20265211 PMAQI
17th Aug 20266212 AMAQI
17th Aug 2026641 AMAQI
17th Aug 2026642 AMAQI
17th Aug 2026643 AMAQI
17th Aug 2026634 AMAQI
17th Aug 2026585 AMAQI

28°C25/31°C

17th Aug 2026566 AMAQI
6 AM
17th Aug 2026547 AMAQI
17th Aug 2026528 AMAQI
17th Aug 2026569 AMAQI
17th Aug 20265210 AMAQI
17th Aug 20264611 AMAQI
17th Aug 20264012 PMAQI
12 PM
17th Aug 2026461 PMAQI
17th Aug 2026362 PMAQI
17th Aug 2026413 PMAQI
17th Aug 2026474 PMAQI
17th Aug 2026465 PMAQI
17th Aug 2026496 PMAQI
6 PM
17th Aug 2026497 PMAQI
17th Aug 2026448 PMAQI
17th Aug 2026419 PMAQI
17th Aug 20263610 PMAQI
17th Aug 20265011 PMAQI
12 AM
5 AM

26°C23/32°C

Day time
Avg. Highest Time
3 PM - 6 PM

55AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
6 AM - 7 AM

52AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 6 PM (Avg. 55), while the lowest AQI was between 6 AM to 7 AM (Avg. 52).
Night time
Avg. Highest Time
11 PM

57AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
10 PM

51AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 PM to 11 PM (Avg. 57), while the lowest AQI was between 10 PM to 10 PM (Avg. 51).

2026 Days Vs Air Quality

San Juan, Puerto Rico, United States

2026

76%

172

24%

54

Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)

Good
172 Days
Moderate
54 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 76%

Health Risk Level:

Low

In 2026, 76% of 230 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

San Juan, Puerto Rico, 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
38AQI (US)
2nd January 2026
40AQI (US)
3rd January 2026
49AQI (US)
4th January 2026
49AQI (US)
5th January 2026
50AQI (US)
6th January 2026
48AQI (US)
7th January 2026
54AQI (US)
8th January 2026
50AQI (US)
9th January 2026
46AQI (US)
10th January 2026
46AQI (US)
11th January 2026
50AQI (US)
12th January 2026
45AQI (US)
13th January 2026
41AQI (US)
14th January 2026
30AQI (US)
15th January 2026
34AQI (US)
16th January 2026
33AQI (US)
17th January 2026
38AQI (US)
18th January 2026
34AQI (US)
19th January 2026
35AQI (US)
20th January 2026
48AQI (US)
21st January 2026
36AQI (US)
22nd January 2026
52AQI (US)
23rd January 2026
56AQI (US)
24th January 2026
50AQI (US)
25th January 2026
54AQI (US)
26th January 2026
50AQI (US)
27th January 2026
44AQI (US)
28th January 2026
47AQI (US)
29th January 2026
50AQI (US)
30th January 2026
55AQI (US)
31st January 2026
52AQI (US)
1st February 2026
52AQI (US)
2nd February 2026
56AQI (US)
3rd February 2026
51AQI (US)
4th February 2026
54AQI (US)
5th February 2026
57AQI (US)
6th February 2026
52AQI (US)
7th February 2026
46AQI (US)
8th February 2026
50AQI (US)
9th February 2026
50AQI (US)
10th February 2026
50AQI (US)
11th February 2026
55AQI (US)
12th February 2026
54AQI (US)
13th February 2026
58AQI (US)
14th February 2026
63AQI (US)
15th February 2026
60AQI (US)
16th February 2026
62AQI (US)
17th February 2026
58AQI (US)
18th February 2026
52AQI (US)
19th February 2026
54AQI (US)
20th February 2026
52AQI (US)
21st February 2026
49AQI (US)
22nd February 2026
44AQI (US)
23rd February 2026
46AQI (US)
24th February 2026
48AQI (US)
25th February 2026
48AQI (US)
26th February 2026
54AQI (US)
27th February 2026
42AQI (US)
28th February 2026
41AQI (US)
1st March 2026
55AQI (US)
2nd March 2026
54AQI (US)
3rd March 2026
55AQI (US)
4th March 2026
55AQI (US)
5th March 2026
48AQI (US)
6th March 2026
62AQI (US)
7th March 2026
49AQI (US)
8th March 2026
53AQI (US)
9th March 2026
49AQI (US)
10th March 2026
48AQI (US)
11th March 2026
46AQI (US)
12th March 2026
48AQI (US)
13th March 2026
55AQI (US)
14th March 2026
40AQI (US)
15th March 2026
56AQI (US)
16th March 2026
46AQI (US)
17th March 2026
42AQI (US)
18th March 2026
36AQI (US)
19th March 2026
50AQI (US)
20th March 2026
47AQI (US)
21st March 2026
40AQI (US)
22nd March 2026
42AQI (US)
23rd March 2026
42AQI (US)
24th March 2026
42AQI (US)
25th March 2026
38AQI (US)
26th March 2026
43AQI (US)
27th March 2026
43AQI (US)
28th March 2026
41AQI (US)
29th March 2026
43AQI (US)
30th March 2026
42AQI (US)
31st March 2026
34AQI (US)
1st April 2026
37AQI (US)
2nd April 2026
42AQI (US)
3rd April 2026
34AQI (US)
4th April 2026
40AQI (US)
5th April 2026
40AQI (US)
6th April 2026
47AQI (US)
7th April 2026
39AQI (US)
8th April 2026
46AQI (US)
9th April 2026
31AQI (US)
10th April 2026
43AQI (US)
11th April 2026
43AQI (US)
12th April 2026
45AQI (US)
13th April 2026
46AQI (US)
14th April 2026
48AQI (US)
15th April 2026
42AQI (US)
16th April 2026
40AQI (US)
17th April 2026
18th April 2026
46AQI (US)
19th April 2026
48AQI (US)
20th April 2026
39AQI (US)
21st April 2026
34AQI (US)
22nd April 2026
23rd April 2026
28AQI (US)
24th April 2026
36AQI (US)
25th April 2026
34AQI (US)
26th April 2026
36AQI (US)
27th April 2026
36AQI (US)
28th April 2026
31AQI (US)
29th April 2026
29AQI (US)
30th April 2026
34AQI (US)
1st May 2026
32AQI (US)
2nd May 2026
30AQI (US)
3rd May 2026
38AQI (US)
4th May 2026
32AQI (US)
5th May 2026
43AQI (US)
6th May 2026
47AQI (US)
7th May 2026
46AQI (US)
8th May 2026
35AQI (US)
9th May 2026
10th May 2026
52AQI (US)
11th May 2026
43AQI (US)
12th May 2026
42AQI (US)
13th May 2026
44AQI (US)
14th May 2026
38AQI (US)
15th May 2026
42AQI (US)
16th May 2026
48AQI (US)
17th May 2026
45AQI (US)
18th May 2026
42AQI (US)
19th May 2026
37AQI (US)
20th May 2026
44AQI (US)
21st May 2026
42AQI (US)
22nd May 2026
38AQI (US)
23rd May 2026
43AQI (US)
24th May 2026
46AQI (US)
25th May 2026
46AQI (US)
26th May 2026
39AQI (US)
27th May 2026
35AQI (US)
28th May 2026
46AQI (US)
29th May 2026
32AQI (US)
30th May 2026
26AQI (US)
31st May 2026
33AQI (US)
1st June 2026
52AQI (US)
2nd June 2026
52AQI (US)
3rd June 2026
50AQI (US)
4th June 2026
31AQI (US)
5th June 2026
34AQI (US)
6th June 2026
38AQI (US)
7th June 2026
23AQI (US)
8th June 2026
34AQI (US)
9th June 2026
32AQI (US)
10th June 2026
30AQI (US)
11th June 2026
46AQI (US)
12th June 2026
46AQI (US)
13th June 2026
41AQI (US)
14th June 2026
34AQI (US)
15th June 2026
56AQI (US)
16th June 2026
46AQI (US)
17th June 2026
44AQI (US)
18th June 2026
42AQI (US)
19th June 2026
52AQI (US)
20th June 2026
37AQI (US)
21st June 2026
37AQI (US)
22nd June 2026
38AQI (US)
23rd June 2026
42AQI (US)
24th June 2026
50AQI (US)
25th June 2026
28AQI (US)
26th June 2026
39AQI (US)
27th June 2026
30AQI (US)
28th June 2026
26AQI (US)
29th June 2026
25AQI (US)
30th June 2026
26AQI (US)
1st July 2026
30AQI (US)
2nd July 2026
30AQI (US)
3rd July 2026
28AQI (US)
4th July 2026
27AQI (US)
5th July 2026
43AQI (US)
6th July 2026
21AQI (US)
7th July 2026
22AQI (US)
8th July 2026
21AQI (US)
9th July 2026
22AQI (US)
10th July 2026
43AQI (US)
11th July 2026
28AQI (US)
12th July 2026
22AQI (US)
13th July 2026
25AQI (US)
14th July 2026
30AQI (US)
15th July 2026
53AQI (US)
16th July 2026
38AQI (US)
17th July 2026
45AQI (US)
18th July 2026
52AQI (US)
19th July 2026
47AQI (US)
20th July 2026
40AQI (US)
21st July 2026
46AQI (US)
22nd July 2026
46AQI (US)
23rd July 2026
42AQI (US)
24th July 2026
52AQI (US)
25th July 2026
51AQI (US)
26th July 2026
54AQI (US)
27th July 2026
47AQI (US)
28th July 2026
61AQI (US)
29th July 2026
55AQI (US)
30th July 2026
54AQI (US)
31st July 2026
52AQI (US)
1st August 2026
42AQI (US)
2nd August 2026
38AQI (US)
3rd August 2026
44AQI (US)
4th August 2026
35AQI (US)
5th August 2026
36AQI (US)
6th August 2026
34AQI (US)
7th August 2026
40AQI (US)
8th August 2026
60AQI (US)
9th August 2026
54AQI (US)
10th August 2026
91AQI (US)
11th August 2026
100AQI (US)
12th August 2026
70AQI (US)
13th August 2026
68AQI (US)
14th August 2026
76AQI (US)
15th August 2026
64AQI (US)
16th August 2026
60AQI (US)
17th August 2026
50AQI (US)
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

45AQI (US)

52AQI (US)

47AQI (US)

39AQI (US)

40AQI (US)

39AQI (US)

40AQI (US)

57AQI (US)

No. of days

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

202644AQI (US)

25
6
11
17
23
8
28
29
1
26
4
22
9
8
9
172
54

Highest AQI (US) recorded in

August

57AQI (US)

Lowest AQI (US) recorded in

June

39AQI (US)

202542AQI (US)

30
1
28
31
30
31
19
11
18
11
2
27
4
30
23
8
13
17
7
24
287
76
2

Highest AQI (US) recorded in

July

60AQI (US)

Lowest AQI (US) recorded in

May

32AQI (US)

202432AQI (US)

30
1
23
4
31
29
1
7
23
1
29
1
28
3
31
3
12
1
27
3
29
2
279
39
1

Highest AQI (US) recorded in

May

63AQI (US)

Lowest AQI (US) recorded in

January

15AQI (US)

202315AQI (US)

31
28
30
1
27
27
30
29
2
23
30
7
27
1
31
320
4

Highest AQI (US) recorded in

July

24AQI (US)

Lowest AQI (US) recorded in

October

7AQI (US)

202210AQI (US)

3
30
30
63

Highest AQI (US) recorded in

October

10AQI (US)

Lowest AQI (US) recorded in

November

9AQI (US)

Most & Least Polluted Years Over the Last 5 Years

Most Polluted Year Recorded
2026(Avg.)
44AQI (US)
Least Polluted Year Recorded
2022(Avg.)
10AQI (US)

San Juan's annual 2026 AQI (US) (44) shows an average percentage change of 143.8% (worsened AQI (US)) compared to previous years: 2022 (10), 2023 (15), 2024 (32), 2025 (42).