Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Arecibo, 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

Arecibo, Puerto Rico, United States

2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
11th Aug 2026
98AQI
Lowest AQI recorded on
22nd Aug 2024
24AQI

Same Day Analysis (15th August):
On this day, AQI across the 3 years varied significantly: 2026 ranks 1st highest AQI at 64 of Moderate air quality on the same day.

Day & Night AQI Trend: 14th Aug - 15th Aug 2026

Arecibo, Puerto Rico, United States

AQI
Day
Night
.

6 AM14th Aug 2026

7 PM

5 AM15th Aug 2026

Day time
Avg. Highest Time
7AM14th Aug

79AQI

Avg. Lowest Time
3PM14th Aug

68AQI

Night time
Avg. Highest Time
9PM14th Aug

80AQI

Avg. Lowest Time
12AM15th Aug

62AQI

In the last 24 hours,

Arecibo's AQI reached its highest point of 80 at 9 PM during the Night, while the lowest point, 62, was recorded at 12 AM during the Night between 14th Aug and 15th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Arecibo, Puerto Rico, United States

JulAug
17th - 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 - 15th15th
Day
Night
17th Jul 2026466 AMAQI
17th Jul 2026427 AMAQI
17th Jul 2026448 AMAQI
17th Jul 2026449 AMAQI
17th Jul 20264410 AMAQI
17th Jul 20264411 AMAQI
17th Jul 20264412 PMAQI
17th Jul 2026461 PMAQI
17th Jul 2026482 PMAQI
17th Jul 2026443 PMAQI
17th Jul 2026464 PMAQI
17th Jul 2026465 PMAQI
17th Jul 2026486 PMAQI
17th Jul 2026517 PMAQI
17th Jul 2026518 PMAQI
17th Jul 2026549 PMAQI
17th Jul 20265410 PMAQI
17th Jul 20263611 PMAQI
18th Jul 20264812 AMAQI
18th Jul 2026511 AMAQI
18th Jul 2026482 AMAQI
18th Jul 2026513 AMAQI
18th Jul 2026514 AMAQI
18th Jul 2026545 AMAQI

27°C23/31°C

18th Jul 2026536 AMAQI
18th Jul 2026557 AMAQI
18th Jul 2026568 AMAQI
18th Jul 2026629 AMAQI
18th Jul 20266010 AMAQI
18th Jul 20265911 AMAQI
18th Jul 20264412 PMAQI
18th Jul 2026551 PMAQI
18th Jul 2026562 PMAQI
18th Jul 2026533 PMAQI
18th Jul 2026514 PMAQI
18th Jul 2026505 PMAQI
18th Jul 2026506 PMAQI
18th Jul 2026447 PMAQI
18th Jul 2026488 PMAQI
18th Jul 2026449 PMAQI
18th Jul 20264910 PMAQI
18th Jul 20264811 PMAQI
19th Jul 20265212 AMAQI
19th Jul 2026511 AMAQI
19th Jul 2026482 AMAQI
19th Jul 2026463 AMAQI
19th Jul 2026484 AMAQI
19th Jul 2026425 AMAQI

27°C24/31°C

19th Jul 2026426 AMAQI
19th Jul 2026447 AMAQI
19th Jul 2026448 AMAQI
19th Jul 2026469 AMAQI
19th Jul 20264610 AMAQI
19th Jul 20264411 AMAQI
19th Jul 20264612 PMAQI
19th Jul 2026461 PMAQI
19th Jul 2026462 PMAQI
19th Jul 2026513 PMAQI
19th Jul 2026494 PMAQI
19th Jul 2026485 PMAQI
19th Jul 2026466 PMAQI
19th Jul 2026487 PMAQI
19th Jul 2026488 PMAQI
19th Jul 2026489 PMAQI
19th Jul 20264610 PMAQI
19th Jul 20264211 PMAQI
20th Jul 20265012 AMAQI
20th Jul 2026471 AMAQI
20th Jul 2026462 AMAQI
20th Jul 2026443 AMAQI
20th Jul 2026464 AMAQI
20th Jul 2026405 AMAQI

27°C24/31°C

20th Jul 2026426 AMAQI
20th Jul 2026487 AMAQI
20th Jul 2026398 AMAQI
20th Jul 2026669 AMAQI
20th Jul 20264010 AMAQI
20th Jul 20263411 AMAQI
20th Jul 20265212 PMAQI
20th Jul 2026251 PMAQI
20th Jul 2026232 PMAQI
20th Jul 2026363 PMAQI
20th Jul 2026334 PMAQI
20th Jul 2026325 PMAQI
20th Jul 2026216 PMAQI
20th Jul 2026387 PMAQI
20th Jul 2026448 PMAQI
20th Jul 2026429 PMAQI
20th Jul 20264010 PMAQI
21st Jul 20265012 AMAQI
21st Jul 2026491 AMAQI
21st Jul 2026512 AMAQI
21st Jul 2026443 AMAQI
21st Jul 2026444 AMAQI
21st Jul 2026425 AMAQI

27°C24/30°C

21st Jul 2026406 AMAQI
21st Jul 2026427 AMAQI
21st Jul 2026408 AMAQI
21st Jul 2026429 AMAQI
21st Jul 20265010 AMAQI
21st Jul 20264611 AMAQI
21st Jul 20264412 PMAQI
21st Jul 2026461 PMAQI
21st Jul 2026502 PMAQI
21st Jul 2026563 PMAQI
21st Jul 2026464 PMAQI
21st Jul 2026445 PMAQI
21st Jul 2026466 PMAQI
21st Jul 2026467 PMAQI
21st Jul 2026348 PMAQI
21st Jul 2026579 PMAQI
21st Jul 20265710 PMAQI
21st Jul 20265911 PMAQI
22nd Jul 20264812 AMAQI
22nd Jul 2026581 AMAQI
22nd Jul 2026552 AMAQI
22nd Jul 2026543 AMAQI
22nd Jul 2026424 AMAQI
22nd Jul 2026445 AMAQI

27°C23/30°C

22nd Jul 2026426 AMAQI
22nd Jul 2026487 AMAQI
22nd Jul 2026528 AMAQI
22nd Jul 2026549 AMAQI
22nd Jul 20265110 AMAQI
22nd Jul 20265211 AMAQI
22nd Jul 20265012 PMAQI
22nd Jul 2026531 PMAQI
22nd Jul 2026512 PMAQI
22nd Jul 2026473 PMAQI
22nd Jul 2026404 PMAQI
22nd Jul 2026445 PMAQI
22nd Jul 2026386 PMAQI
22nd Jul 2026257 PMAQI
22nd Jul 2026408 PMAQI
22nd Jul 2026489 PMAQI
22nd Jul 20262510 PMAQI
22nd Jul 20265711 PMAQI
23rd Jul 20262512 AMAQI
23rd Jul 2026271 AMAQI
23rd Jul 2026402 AMAQI
23rd Jul 2026333 AMAQI
23rd Jul 2026364 AMAQI
23rd Jul 2026345 AMAQI

27°C24/31°C

23rd Jul 2026456 AMAQI
23rd Jul 2026297 AMAQI
23rd Jul 2026408 AMAQI
23rd Jul 2026369 AMAQI
23rd Jul 20266010 AMAQI
23rd Jul 20264611 AMAQI
23rd Jul 20265012 PMAQI
23rd Jul 2026521 PMAQI
23rd Jul 2026522 PMAQI
23rd Jul 2026523 PMAQI
23rd Jul 2026534 PMAQI
23rd Jul 2026545 PMAQI
23rd Jul 2026506 PMAQI
23rd Jul 2026517 PMAQI
23rd Jul 2026508 PMAQI
23rd Jul 2026489 PMAQI
23rd Jul 20263410 PMAQI
23rd Jul 20264211 PMAQI
24th Jul 20264412 AMAQI
24th Jul 2026421 AMAQI
24th Jul 2026492 AMAQI
24th Jul 2026573 AMAQI
24th Jul 2026564 AMAQI
24th Jul 2026445 AMAQI

27°C24/30°C

24th Jul 2026516 AMAQI
24th Jul 2026497 AMAQI
24th Jul 2026518 AMAQI
24th Jul 2026539 AMAQI
24th Jul 20265610 AMAQI
24th Jul 20265411 AMAQI
24th Jul 20265512 PMAQI
24th Jul 2026521 PMAQI
24th Jul 2026532 PMAQI
24th Jul 2026513 PMAQI
24th Jul 2026544 PMAQI
24th Jul 2026565 PMAQI
24th Jul 2026596 PMAQI
24th Jul 2026567 PMAQI
24th Jul 2026578 PMAQI
24th Jul 2026569 PMAQI
24th Jul 20265810 PMAQI
24th Jul 20264811 PMAQI
25th Jul 20265812 AMAQI
25th Jul 2026541 AMAQI
25th Jul 2026512 AMAQI
25th Jul 2026523 AMAQI
25th Jul 2026534 AMAQI
25th Jul 2026465 AMAQI

27°C23/31°C

25th Jul 2026516 AMAQI
25th Jul 2026497 AMAQI
25th Jul 2026518 AMAQI
25th Jul 2026429 AMAQI
25th Jul 20266610 AMAQI
25th Jul 20263111 AMAQI
25th Jul 20264712 PMAQI
25th Jul 2026461 PMAQI
25th Jul 2026562 PMAQI
25th Jul 2026633 PMAQI
25th Jul 2026564 PMAQI
25th Jul 2026545 PMAQI
25th Jul 2026486 PMAQI
25th Jul 2026517 PMAQI
25th Jul 2026508 PMAQI
25th Jul 2026679 PMAQI
25th Jul 20264410 PMAQI
25th Jul 20265211 PMAQI
26th Jul 20265012 AMAQI
26th Jul 2026531 AMAQI
26th Jul 2026522 AMAQI
26th Jul 2026533 AMAQI
26th Jul 2026584 AMAQI
26th Jul 2026575 AMAQI

27°C24/30°C

26th Jul 2026546 AMAQI
26th Jul 2026537 AMAQI
26th Jul 2026638 AMAQI
26th Jul 2026579 AMAQI
26th Jul 20265810 AMAQI
26th Jul 20265411 AMAQI
26th Jul 20265512 PMAQI
26th Jul 2026581 PMAQI
26th Jul 2026582 PMAQI
26th Jul 2026533 PMAQI
26th Jul 2026514 PMAQI
26th Jul 2026515 PMAQI
26th Jul 2026506 PMAQI
26th Jul 2026537 PMAQI
26th Jul 2026608 PMAQI
26th Jul 2026589 PMAQI
26th Jul 20264410 PMAQI
26th Jul 20265511 PMAQI
27th Jul 20265412 AMAQI
27th Jul 2026551 AMAQI
27th Jul 2026542 AMAQI
27th Jul 2026553 AMAQI
27th Jul 2026574 AMAQI
27th Jul 2026545 AMAQI

27°C25/31°C

27th Jul 2026536 AMAQI
27th Jul 2026557 AMAQI
27th Jul 2026538 AMAQI
27th Jul 2026489 AMAQI
27th Jul 20265510 AMAQI
27th Jul 20265811 AMAQI
27th Jul 20265512 PMAQI
27th Jul 2026551 PMAQI
27th Jul 2026442 PMAQI
27th Jul 2026423 PMAQI
27th Jul 2026464 PMAQI
27th Jul 2026425 PMAQI
27th Jul 2026366 PMAQI
27th Jul 2026467 PMAQI
27th Jul 2026488 PMAQI
27th Jul 2026499 PMAQI
27th Jul 20263810 PMAQI
27th Jul 20264611 PMAQI
28th Jul 20264412 AMAQI
28th Jul 2026481 AMAQI
28th Jul 2026562 AMAQI
28th Jul 2026533 AMAQI
28th Jul 2026544 AMAQI
28th Jul 2026565 AMAQI

27°C24/30°C

28th Jul 2026596 AMAQI
28th Jul 2026627 AMAQI
28th Jul 2026588 AMAQI
28th Jul 2026639 AMAQI
28th Jul 20266510 AMAQI
28th Jul 20266511 AMAQI
28th Jul 20266912 PMAQI
28th Jul 2026681 PMAQI
28th Jul 2026532 PMAQI
28th Jul 2026573 PMAQI
28th Jul 2026604 PMAQI
28th Jul 2026585 PMAQI
28th Jul 2026676 PMAQI
28th Jul 2026747 PMAQI
28th Jul 2026678 PMAQI
28th Jul 2026649 PMAQI
28th Jul 20266710 PMAQI
28th Jul 20266511 PMAQI
29th Jul 20265412 AMAQI
29th Jul 2026441 AMAQI
29th Jul 2026572 AMAQI
29th Jul 2026623 AMAQI
29th Jul 2026604 AMAQI
29th Jul 2026585 AMAQI

27°C24/31°C

29th Jul 2026646 AMAQI
29th Jul 2026647 AMAQI
29th Jul 2026628 AMAQI
29th Jul 2026579 AMAQI
29th Jul 20265110 AMAQI
29th Jul 20264611 AMAQI
29th Jul 20264812 PMAQI
29th Jul 2026481 PMAQI
29th Jul 2026522 PMAQI
29th Jul 2026543 PMAQI
29th Jul 2026484 PMAQI
29th Jul 2026565 PMAQI
29th Jul 2026576 PMAQI
29th Jul 2026577 PMAQI
29th Jul 2026628 PMAQI
29th Jul 2026629 PMAQI
29th Jul 20264810 PMAQI
29th Jul 20265711 PMAQI
30th Jul 20265812 AMAQI
30th Jul 2026541 AMAQI
30th Jul 2026552 AMAQI
30th Jul 2026573 AMAQI
30th Jul 2026584 AMAQI
30th Jul 2026555 AMAQI

28°C25/32°C

30th Jul 2026566 AMAQI
30th Jul 2026557 AMAQI
30th Jul 2026578 AMAQI
30th Jul 2026539 AMAQI
30th Jul 20265210 AMAQI
30th Jul 20265111 AMAQI
30th Jul 20265012 PMAQI
30th Jul 2026531 PMAQI
30th Jul 2026442 PMAQI
30th Jul 2026503 PMAQI
30th Jul 2026524 PMAQI
30th Jul 2026505 PMAQI
30th Jul 2026516 PMAQI
30th Jul 2026527 PMAQI
30th Jul 2026528 PMAQI
30th Jul 2026609 PMAQI
30th Jul 20266310 PMAQI
30th Jul 20266011 PMAQI
31st Jul 20266412 AMAQI
31st Jul 2026641 AMAQI
31st Jul 2026582 AMAQI
31st Jul 2026623 AMAQI
31st Jul 2026604 AMAQI
31st Jul 2026605 AMAQI

28°C24/32°C

31st Jul 2026576 AMAQI
31st Jul 2026597 AMAQI
31st Jul 2026598 AMAQI
31st Jul 2026549 AMAQI
31st Jul 20265410 AMAQI
31st Jul 20265711 AMAQI
31st Jul 20265112 PMAQI
31st Jul 2026461 PMAQI
31st Jul 2026502 PMAQI
31st Jul 2026463 PMAQI
31st Jul 2026444 PMAQI
31st Jul 2026425 PMAQI
31st Jul 2026406 PMAQI
31st Jul 2026407 PMAQI
31st Jul 2026388 PMAQI
31st Jul 2026299 PMAQI
31st Jul 20262910 PMAQI
31st Jul 20264811 PMAQI
1st Aug 20263612 AMAQI
1st Aug 2026491 AMAQI
1st Aug 2026482 AMAQI
1st Aug 2026463 AMAQI
1st Aug 2026484 AMAQI
1st Aug 2026545 AMAQI

27°C25/30°C

1st Aug 2026406 AMAQI
1st Aug 2026427 AMAQI
1st Aug 2026448 AMAQI
1st Aug 2026469 AMAQI
1st Aug 20264010 AMAQI
1st Aug 20264011 AMAQI
1st Aug 20264012 PMAQI
1st Aug 2026441 PMAQI
1st Aug 2026272 PMAQI
1st Aug 2026443 PMAQI
1st Aug 2026424 PMAQI
1st Aug 2026405 PMAQI
1st Aug 2026426 PMAQI
1st Aug 2026387 PMAQI
1st Aug 2026368 PMAQI
1st Aug 2026509 PMAQI
1st Aug 20263110 PMAQI
1st Aug 20263611 PMAQI
2nd Aug 20263812 AMAQI
2nd Aug 2026341 AMAQI
2nd Aug 2026362 AMAQI
2nd Aug 2026383 AMAQI
2nd Aug 2026404 AMAQI
2nd Aug 2026215 AMAQI

26°C24/30°C

2nd Aug 2026366 AMAQI
2nd Aug 2026277 AMAQI
2nd Aug 2026298 AMAQI
2nd Aug 2026259 AMAQI
2nd Aug 20262310 AMAQI
2nd Aug 20262311 AMAQI
2nd Aug 20262312 PMAQI
2nd Aug 2026331 PMAQI
2nd Aug 2026362 PMAQI
2nd Aug 2026383 PMAQI
2nd Aug 2026424 PMAQI
2nd Aug 2026485 PMAQI
2nd Aug 2026526 PMAQI
2nd Aug 2026527 PMAQI
2nd Aug 2026528 PMAQI
2nd Aug 2026489 PMAQI
2nd Aug 20263610 PMAQI
2nd Aug 20264811 PMAQI
3rd Aug 20265012 AMAQI
3rd Aug 2026441 AMAQI
3rd Aug 2026482 AMAQI
3rd Aug 2026403 AMAQI
3rd Aug 2026424 AMAQI
3rd Aug 2026425 AMAQI

27°C25/31°C

3rd Aug 2026426 AMAQI
3rd Aug 2026547 AMAQI
3rd Aug 2026448 AMAQI
3rd Aug 2026429 AMAQI
3rd Aug 20264210 AMAQI
3rd Aug 20264611 AMAQI
3rd Aug 20264612 PMAQI
3rd Aug 2026481 PMAQI
3rd Aug 2026462 PMAQI
3rd Aug 2026483 PMAQI
3rd Aug 2026444 PMAQI
3rd Aug 2026425 PMAQI
3rd Aug 2026426 PMAQI
3rd Aug 2026497 PMAQI
3rd Aug 2026428 PMAQI
3rd Aug 2026449 PMAQI
3rd Aug 20263410 PMAQI
3rd Aug 20263211 PMAQI
4th Aug 20263612 AMAQI
4th Aug 2026361 AMAQI
4th Aug 2026382 AMAQI
4th Aug 2026253 AMAQI
4th Aug 2026294 AMAQI
4th Aug 2026275 AMAQI

27°C25/31°C

4th Aug 2026276 AMAQI
4th Aug 2026327 AMAQI
4th Aug 2026348 AMAQI
4th Aug 2026409 AMAQI
4th Aug 20266010 AMAQI
4th Aug 20265211 AMAQI
4th Aug 20262912 PMAQI
4th Aug 2026551 PMAQI
4th Aug 2026402 PMAQI
4th Aug 2026423 PMAQI
4th Aug 2026274 PMAQI
4th Aug 2026295 PMAQI
4th Aug 2026316 PMAQI
4th Aug 2026347 PMAQI
4th Aug 2026298 PMAQI
4th Aug 2026369 PMAQI
4th Aug 20263810 PMAQI
4th Aug 20264611 PMAQI
5th Aug 20264212 AMAQI
5th Aug 2026361 AMAQI
5th Aug 2026322 AMAQI
5th Aug 2026443 AMAQI
5th Aug 2026364 AMAQI
5th Aug 2026445 AMAQI

27°C24/30°C

5th Aug 2026466 AMAQI
5th Aug 2026387 AMAQI
5th Aug 2026428 AMAQI
5th Aug 2026429 AMAQI
5th Aug 20264410 AMAQI
5th Aug 20264611 AMAQI
5th Aug 20264212 PMAQI
5th Aug 2026311 PMAQI
5th Aug 2026362 PMAQI
5th Aug 2026513 PMAQI
5th Aug 2026464 PMAQI
5th Aug 2026345 PMAQI
5th Aug 2026276 PMAQI
5th Aug 2026367 PMAQI
5th Aug 2026258 PMAQI
5th Aug 2026309 PMAQI
5th Aug 20263810 PMAQI
5th Aug 20264011 PMAQI
6th Aug 20262712 AMAQI
6th Aug 2026251 AMAQI
6th Aug 2026212 AMAQI
6th Aug 2026323 AMAQI
6th Aug 2026384 AMAQI
6th Aug 2026255 AMAQI

27°C24/30°C

6th Aug 2026446 AMAQI
6th Aug 2026407 AMAQI
6th Aug 2026448 AMAQI
6th Aug 2026429 AMAQI
6th Aug 20262710 AMAQI
6th Aug 20263611 AMAQI
6th Aug 20263412 PMAQI
6th Aug 2026291 PMAQI
6th Aug 2026322 PMAQI
6th Aug 2026293 PMAQI
6th Aug 2026424 PMAQI
6th Aug 2026385 PMAQI
6th Aug 2026256 PMAQI
6th Aug 2026277 PMAQI
6th Aug 2026428 PMAQI
6th Aug 2026369 PMAQI
6th Aug 20263410 PMAQI
6th Aug 20264211 PMAQI
7th Aug 20262512 AMAQI
7th Aug 2026341 AMAQI
7th Aug 2026232 AMAQI
7th Aug 2026293 AMAQI
7th Aug 2026274 AMAQI
7th Aug 2026235 AMAQI

27°C24/30°C

7th Aug 2026256 AMAQI
7th Aug 2026277 AMAQI
7th Aug 2026298 AMAQI
7th Aug 2026349 AMAQI
7th Aug 20264210 AMAQI
7th Aug 20264211 AMAQI
7th Aug 20262312 PMAQI
7th Aug 2026421 PMAQI
7th Aug 2026442 PMAQI
7th Aug 2026483 PMAQI
7th Aug 2026524 PMAQI
7th Aug 2026575 PMAQI
7th Aug 2026576 PMAQI
7th Aug 2026567 PMAQI
7th Aug 2026508 PMAQI
7th Aug 2026489 PMAQI
7th Aug 20265410 PMAQI
7th Aug 20265711 PMAQI
8th Aug 20265712 AMAQI
8th Aug 2026581 AMAQI
8th Aug 2026642 AMAQI
8th Aug 2026653 AMAQI
8th Aug 2026634 AMAQI
8th Aug 2026625 AMAQI

27°C23/30°C

8th Aug 2026596 AMAQI
8th Aug 2026627 AMAQI
8th Aug 2026608 AMAQI
8th Aug 2026599 AMAQI
8th Aug 20266410 AMAQI
8th Aug 20266411 AMAQI
8th Aug 20266212 PMAQI
8th Aug 2026621 PMAQI
8th Aug 2026672 PMAQI
8th Aug 2026663 PMAQI
8th Aug 2026664 PMAQI
8th Aug 2026635 PMAQI
8th Aug 2026606 PMAQI
8th Aug 2026597 PMAQI
8th Aug 2026578 PMAQI
8th Aug 2026589 PMAQI
8th Aug 20265410 PMAQI
8th Aug 20265611 PMAQI
9th Aug 20265312 AMAQI
9th Aug 2026501 AMAQI
9th Aug 2026512 AMAQI
9th Aug 2026523 AMAQI
9th Aug 2026534 AMAQI
9th Aug 2026515 AMAQI

27°C24/31°C

9th Aug 2026506 AMAQI
9th Aug 2026527 AMAQI
9th Aug 2026538 AMAQI
9th Aug 2026539 AMAQI
9th Aug 20265510 AMAQI
9th Aug 20265511 AMAQI
9th Aug 20265412 PMAQI
9th Aug 2026551 PMAQI
9th Aug 2026582 PMAQI
9th Aug 2026543 PMAQI
9th Aug 2026594 PMAQI
9th Aug 2026575 PMAQI
9th Aug 2026676 PMAQI
9th Aug 2026557 PMAQI
9th Aug 2026668 PMAQI
9th Aug 2026679 PMAQI
9th Aug 20265810 PMAQI
9th Aug 20266711 PMAQI
10th Aug 20266712 AMAQI
10th Aug 2026651 AMAQI
10th Aug 2026712 AMAQI
10th Aug 2026713 AMAQI
10th Aug 2026734 AMAQI
10th Aug 2026725 AMAQI

28°C25/30°C

10th Aug 2026676 AMAQI
10th Aug 2026677 AMAQI
10th Aug 2026688 AMAQI
10th Aug 2026669 AMAQI
10th Aug 20267210 AMAQI
10th Aug 20268211 AMAQI
10th Aug 20268512 PMAQI
10th Aug 2026911 PMAQI
10th Aug 20261042 PMAQI
10th Aug 20261103 PMAQI
10th Aug 20261114 PMAQI
10th Aug 20261155 PMAQI
10th Aug 20261166 PMAQI
10th Aug 20261147 PMAQI
10th Aug 20261268 PMAQI
10th Aug 20261269 PMAQI
10th Aug 20269010 PMAQI
10th Aug 202612811 PMAQI
11th Aug 202611812 AMAQI
11th Aug 20261061 AMAQI
11th Aug 2026932 AMAQI
11th Aug 2026873 AMAQI
11th Aug 2026854 AMAQI
11th Aug 2026845 AMAQI

28°C25/31°C

11th Aug 2026806 AMAQI
11th Aug 2026787 AMAQI
11th Aug 2026818 AMAQI
11th Aug 2026869 AMAQI
11th Aug 20268910 AMAQI
11th Aug 20267611 AMAQI
11th Aug 20268812 PMAQI
11th Aug 20261081 PMAQI
11th Aug 20261182 PMAQI
11th Aug 20261123 PMAQI
11th Aug 20261184 PMAQI
11th Aug 20261225 PMAQI
11th Aug 20261136 PMAQI
11th Aug 20261217 PMAQI
11th Aug 20261088 PMAQI
11th Aug 20261089 PMAQI
11th Aug 20268410 PMAQI
11th Aug 20269511 PMAQI
12th Aug 202610212 AMAQI
12th Aug 20261141 AMAQI
12th Aug 20261082 AMAQI
12th Aug 2026903 AMAQI
12th Aug 2026744 AMAQI
12th Aug 2026625 AMAQI

27°C25/30°C

12th Aug 2026626 AMAQI
12th Aug 2026667 AMAQI
12th Aug 2026698 AMAQI
12th Aug 2026719 AMAQI
12th Aug 20267210 AMAQI
12th Aug 20268011 AMAQI
12th Aug 20268612 PMAQI
12th Aug 2026601 PMAQI
12th Aug 2026562 PMAQI
12th Aug 2026543 PMAQI
12th Aug 2026484 PMAQI
12th Aug 2026465 PMAQI
12th Aug 2026526 PMAQI
12th Aug 2026517 PMAQI
12th Aug 2026528 PMAQI
12th Aug 2026549 PMAQI
12th Aug 20265710 PMAQI
12th Aug 20266411 PMAQI
13th Aug 20266412 AMAQI
13th Aug 2026651 AMAQI
13th Aug 2026642 AMAQI
13th Aug 2026623 AMAQI
13th Aug 2026664 AMAQI
13th Aug 2026625 AMAQI

27°C24/31°C

13th Aug 2026636 AMAQI
13th Aug 2026667 AMAQI
13th Aug 2026668 AMAQI
13th Aug 2026679 AMAQI
13th Aug 20266810 AMAQI
13th Aug 20266811 AMAQI
13th Aug 20266812 PMAQI
13th Aug 2026571 PMAQI
13th Aug 2026712 PMAQI
13th Aug 2026763 PMAQI
13th Aug 2026794 PMAQI
13th Aug 2026795 PMAQI
13th Aug 2026766 PMAQI
13th Aug 2026767 PMAQI
13th Aug 2026768 PMAQI
13th Aug 2026709 PMAQI
13th Aug 20267410 PMAQI
13th Aug 20267811 PMAQI
14th Aug 20267912 AMAQI
14th Aug 2026801 AMAQI
14th Aug 2026802 AMAQI
14th Aug 2026803 AMAQI
14th Aug 2026824 AMAQI
14th Aug 2026795 AMAQI

28°C25/32°C

14th Aug 2026736 AMAQI
14th Aug 2026797 AMAQI
14th Aug 2026768 AMAQI
14th Aug 2026739 AMAQI
14th Aug 20267610 AMAQI
14th Aug 20267211 AMAQI
14th Aug 20267212 PMAQI
14th Aug 2026721 PMAQI
14th Aug 2026732 PMAQI
14th Aug 2026683 PMAQI
14th Aug 2026794 PMAQI
14th Aug 2026755 PMAQI
14th Aug 2026746 PMAQI
14th Aug 2026737 PMAQI
14th Aug 2026768 PMAQI
14th Aug 2026809 PMAQI
14th Aug 20267510 PMAQI
14th Aug 20267511 PMAQI
15th Aug 20266212 AMAQI
15th Aug 2026711 AMAQI
15th Aug 2026652 AMAQI
15th Aug 2026663 AMAQI
15th Aug 2026644 AMAQI
15th Aug 2026645 AMAQI

28°C26/32°C

15th Aug 2026606 AMAQI
6 AM
15th Aug 2026647 AMAQI
15th Aug 2026658 AMAQI
15th Aug 2026639 AMAQI
15th Aug 20265810 AMAQI
15th Aug 20267011 AMAQI
15th Aug 20266712 PMAQI
12 PM
15th Aug 2026711 PMAQI
15th Aug 2026692 PMAQI
15th Aug 2026703 PMAQI
15th Aug 2026714 PMAQI
15th Aug 2026655 PMAQI
15th Aug 2026546 PMAQI
15th Aug 2026627 PMAQI
7 PM
15th Aug 2026518 PMAQI
15th Aug 2026579 PMAQI
15th Aug 20266010 PMAQI
15th Aug 20266411 PMAQI
12 AM
5 AM

28°C26/31°C

Day time
Avg. Highest Time
3 PM - 5 PM

55AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
6 AM - 9 AM

52AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 5 PM (Avg. 55), while the lowest AQI was between 6 AM to 9 AM (Avg. 52).
Night time
Avg. Highest Time
9 PM

57AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM

50AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 9 PM (Avg. 57), while the lowest AQI was between 5 AM to 5 AM (Avg. 50).

2026 Days Vs Air Quality

Arecibo, Puerto Rico, United States

2026

80%

180

20%

44

Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)

Good
180 Days
Moderate
44 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 80%

Health Risk Level:

Low

In 2026, 80% of 227 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

Arecibo, 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
41AQI (US)
3rd January 2026
49AQI (US)
4th January 2026
49AQI (US)
5th January 2026
50AQI (US)
6th January 2026
46AQI (US)
7th January 2026
54AQI (US)
8th January 2026
49AQI (US)
9th January 2026
45AQI (US)
10th January 2026
46AQI (US)
11th January 2026
50AQI (US)
12th January 2026
44AQI (US)
13th January 2026
40AQI (US)
14th January 2026
30AQI (US)
15th January 2026
34AQI (US)
16th January 2026
33AQI (US)
17th January 2026
37AQI (US)
18th January 2026
35AQI (US)
19th January 2026
35AQI (US)
20th January 2026
46AQI (US)
21st January 2026
36AQI (US)
22nd January 2026
51AQI (US)
23rd January 2026
55AQI (US)
24th January 2026
48AQI (US)
25th January 2026
54AQI (US)
26th January 2026
50AQI (US)
27th January 2026
44AQI (US)
28th January 2026
44AQI (US)
29th January 2026
47AQI (US)
30th January 2026
57AQI (US)
31st January 2026
50AQI (US)
1st February 2026
53AQI (US)
2nd February 2026
56AQI (US)
3rd February 2026
50AQI (US)
4th February 2026
52AQI (US)
5th February 2026
55AQI (US)
6th February 2026
52AQI (US)
7th February 2026
46AQI (US)
8th February 2026
50AQI (US)
9th February 2026
49AQI (US)
10th February 2026
43AQI (US)
11th February 2026
44AQI (US)
12th February 2026
49AQI (US)
13th February 2026
54AQI (US)
14th February 2026
59AQI (US)
15th February 2026
57AQI (US)
16th February 2026
53AQI (US)
17th February 2026
54AQI (US)
18th February 2026
51AQI (US)
19th February 2026
53AQI (US)
20th February 2026
49AQI (US)
21st February 2026
47AQI (US)
22nd February 2026
45AQI (US)
23rd February 2026
45AQI (US)
24th February 2026
48AQI (US)
25th February 2026
47AQI (US)
26th February 2026
52AQI (US)
27th February 2026
38AQI (US)
28th February 2026
41AQI (US)
1st March 2026
47AQI (US)
2nd March 2026
52AQI (US)
3rd March 2026
55AQI (US)
4th March 2026
54AQI (US)
5th March 2026
42AQI (US)
6th March 2026
61AQI (US)
7th March 2026
46AQI (US)
8th March 2026
52AQI (US)
9th March 2026
48AQI (US)
10th March 2026
38AQI (US)
11th March 2026
39AQI (US)
12th March 2026
48AQI (US)
13th March 2026
54AQI (US)
14th March 2026
39AQI (US)
15th March 2026
54AQI (US)
16th March 2026
41AQI (US)
17th March 2026
41AQI (US)
18th March 2026
35AQI (US)
19th March 2026
46AQI (US)
20th March 2026
41AQI (US)
21st March 2026
42AQI (US)
22nd March 2026
38AQI (US)
23rd March 2026
41AQI (US)
24th March 2026
41AQI (US)
25th March 2026
37AQI (US)
26th March 2026
36AQI (US)
27th March 2026
41AQI (US)
28th March 2026
36AQI (US)
29th March 2026
39AQI (US)
30th March 2026
38AQI (US)
31st March 2026
33AQI (US)
1st April 2026
34AQI (US)
2nd April 2026
38AQI (US)
3rd April 2026
33AQI (US)
4th April 2026
39AQI (US)
5th April 2026
41AQI (US)
6th April 2026
47AQI (US)
7th April 2026
38AQI (US)
8th April 2026
46AQI (US)
9th April 2026
30AQI (US)
10th April 2026
42AQI (US)
11th April 2026
41AQI (US)
12th April 2026
42AQI (US)
13th April 2026
40AQI (US)
14th April 2026
45AQI (US)
15th April 2026
39AQI (US)
16th April 2026
39AQI (US)
17th April 2026
18th April 2026
44AQI (US)
19th April 2026
46AQI (US)
20th April 2026
36AQI (US)
21st April 2026
33AQI (US)
22nd April 2026
23rd April 2026
27AQI (US)
24th April 2026
31AQI (US)
25th April 2026
32AQI (US)
26th April 2026
37AQI (US)
27th April 2026
31AQI (US)
28th April 2026
29AQI (US)
29th April 2026
27AQI (US)
30th April 2026
30AQI (US)
1st May 2026
32AQI (US)
2nd May 2026
30AQI (US)
3rd May 2026
34AQI (US)
4th May 2026
33AQI (US)
5th May 2026
40AQI (US)
6th May 2026
44AQI (US)
7th May 2026
44AQI (US)
8th May 2026
34AQI (US)
9th May 2026
10th May 2026
49AQI (US)
11th May 2026
39AQI (US)
12th May 2026
38AQI (US)
13th May 2026
41AQI (US)
14th May 2026
37AQI (US)
15th May 2026
41AQI (US)
16th May 2026
48AQI (US)
17th May 2026
45AQI (US)
18th May 2026
42AQI (US)
19th May 2026
37AQI (US)
20th May 2026
45AQI (US)
21st May 2026
42AQI (US)
22nd May 2026
39AQI (US)
23rd May 2026
44AQI (US)
24th May 2026
46AQI (US)
25th May 2026
46AQI (US)
26th May 2026
40AQI (US)
27th May 2026
35AQI (US)
28th May 2026
45AQI (US)
29th May 2026
30AQI (US)
30th May 2026
26AQI (US)
31st May 2026
30AQI (US)
1st June 2026
51AQI (US)
2nd June 2026
50AQI (US)
3rd June 2026
48AQI (US)
4th June 2026
32AQI (US)
5th June 2026
31AQI (US)
6th June 2026
36AQI (US)
7th June 2026
23AQI (US)
8th June 2026
33AQI (US)
9th June 2026
32AQI (US)
10th June 2026
30AQI (US)
11th June 2026
39AQI (US)
12th June 2026
40AQI (US)
13th June 2026
35AQI (US)
14th June 2026
33AQI (US)
15th June 2026
57AQI (US)
16th June 2026
47AQI (US)
17th June 2026
44AQI (US)
18th June 2026
41AQI (US)
19th June 2026
51AQI (US)
20th June 2026
37AQI (US)
21st June 2026
37AQI (US)
22nd June 2026
39AQI (US)
23rd June 2026
42AQI (US)
24th June 2026
48AQI (US)
25th June 2026
26AQI (US)
26th June 2026
38AQI (US)
27th June 2026
30AQI (US)
28th June 2026
28AQI (US)
29th June 2026
25AQI (US)
30th June 2026
26AQI (US)
1st July 2026
27AQI (US)
2nd July 2026
30AQI (US)
3rd July 2026
28AQI (US)
4th July 2026
27AQI (US)
5th July 2026
45AQI (US)
6th July 2026
21AQI (US)
7th July 2026
22AQI (US)
8th July 2026
20AQI (US)
9th July 2026
21AQI (US)
10th July 2026
41AQI (US)
11th July 2026
27AQI (US)
12th July 2026
22AQI (US)
13th July 2026
25AQI (US)
14th July 2026
30AQI (US)
15th July 2026
51AQI (US)
16th July 2026
35AQI (US)
17th July 2026
44AQI (US)
18th July 2026
52AQI (US)
19th July 2026
47AQI (US)
20th July 2026
40AQI (US)
21st July 2026
47AQI (US)
22nd July 2026
47AQI (US)
23rd July 2026
43AQI (US)
24th July 2026
53AQI (US)
25th July 2026
52AQI (US)
26th July 2026
54AQI (US)
27th July 2026
50AQI (US)
28th July 2026
60AQI (US)
29th July 2026
55AQI (US)
30th July 2026
54AQI (US)
31st July 2026
50AQI (US)
1st August 2026
42AQI (US)
2nd August 2026
37AQI (US)
3rd August 2026
44AQI (US)
4th August 2026
36AQI (US)
5th August 2026
39AQI (US)
6th August 2026
34AQI (US)
7th August 2026
40AQI (US)
8th August 2026
61AQI (US)
9th August 2026
56AQI (US)
10th August 2026
90AQI (US)
11th August 2026
98AQI (US)
12th August 2026
69AQI (US)
13th August 2026
69AQI (US)
14th August 2026
76AQI (US)
15th August 2026
64AQI (US)
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

45AQI (US)

50AQI (US)

44AQI (US)

37AQI (US)

39AQI (US)

38AQI (US)

39AQI (US)

57AQI (US)

No. of days

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

202643AQI (US)

26
5
15
13
24
7
28
30
27
3
23
8
7
8
180
44

Highest AQI (US) recorded in

August

57AQI (US)

Lowest AQI (US) recorded in

April

37AQI (US)

202541AQI (US)

30
1
28
30
1
27
3
31
30
18
12
1
27
4
29
1
22
9
13
17
6
25
291
73
1

Highest AQI (US) recorded in

July

54AQI (US)

Lowest AQI (US) recorded in

May

26AQI (US)

202433AQI (US)

16
1
1
1
9
3
29
1
29
2
28
1
3
12
1
30
30
1
188
10

Highest AQI (US) recorded in

May

45AQI (US)

Lowest AQI (US) recorded in

January

21AQI (US)

20233AQI (US)

31
28
31
30
31
30
5
3
31
220

Highest AQI (US) recorded in

November

12AQI (US)

Lowest AQI (US) recorded in

February

0AQI (US)

20220AQI (US)

3
30
30
63

Highest AQI (US) recorded in

December

1AQI (US)

Lowest AQI (US) recorded in

November

0AQI (US)

Most & Least Polluted Years Over the Last 5 Years

Most Polluted Year Recorded
2026(Avg.)
43AQI (US)
Least Polluted Year Recorded
2022(Avg.)
0AQI (US)

Arecibo's annual 2026 AQI (US) (43) shows an average percentage change of 367.1% (worsened AQI (US)) compared to previous years: 2022 (0), 2023 (3), 2024 (33), 2025 (41).