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Monterrey, San Pedro, San Jose, Costa Rica 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+

October Air Quality Analysis

Monterrey, San Pedro, San Jose, Costa Rica

2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
9th Oct 2025
63AQI
Lowest AQI recorded on
11th Oct 2025
39AQI

Same Day Analysis (17th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 17th Oct - 18th Oct 2025

Monterrey, San Pedro, San Jose, Costa Rica

AQI
Day
Night
.

5 AM17th Oct 2025

5 PM

4 AM18th Oct 2025

Day time
Avg. Highest Time
7AM17th Oct

53AQI

Avg. Lowest Time
5AM17th Oct

37AQI

Night time
Avg. Highest Time
8PM17th Oct

54AQI

Avg. Lowest Time
12AM18th Oct

35AQI

In the last 24 hours,

Monterrey's AQI reached its highest point of 54 at 8 PM during the Night, while the lowest point, 35, was recorded at 12 AM during the Night between 17th Oct and 18th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Monterrey, San Pedro, San Jose, Costa Rica

SepOct
18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th
Day
Night
18th Sep 2025355 AMAQI
18th Sep 2025356 AMAQI
18th Sep 2025367 AMAQI
18th Sep 2025368 AMAQI
18th Sep 2025369 AMAQI
18th Sep 20253610 AMAQI
18th Sep 20254011 AMAQI
18th Sep 20253912 PMAQI
18th Sep 2025401 PMAQI
18th Sep 2025392 PMAQI
18th Sep 2025393 PMAQI
18th Sep 2025414 PMAQI
18th Sep 2025385 PMAQI
18th Sep 2025396 PMAQI
18th Sep 2025387 PMAQI
18th Sep 2025398 PMAQI
18th Sep 2025399 PMAQI
18th Sep 20254010 PMAQI
18th Sep 20253911 PMAQI
19th Sep 20254012 AMAQI
19th Sep 2025401 AMAQI
19th Sep 2025392 AMAQI
19th Sep 2025343 AMAQI
19th Sep 2025404 AMAQI

18°C15/23°C

19th Sep 2025365 AMAQI
19th Sep 2025386 AMAQI
19th Sep 2025397 AMAQI
19th Sep 2025428 AMAQI
19th Sep 2025429 AMAQI
19th Sep 20254410 AMAQI
19th Sep 20254211 AMAQI
19th Sep 20254312 PMAQI
19th Sep 2025421 PMAQI
19th Sep 2025442 PMAQI
19th Sep 2025403 PMAQI
19th Sep 2025424 PMAQI
19th Sep 2025415 PMAQI
19th Sep 2025426 PMAQI
19th Sep 2025407 PMAQI
19th Sep 2025438 PMAQI
19th Sep 2025479 PMAQI
19th Sep 20254510 PMAQI
19th Sep 20254411 PMAQI
20th Sep 20254212 AMAQI
20th Sep 2025331 AMAQI
20th Sep 2025352 AMAQI
20th Sep 2025343 AMAQI
20th Sep 2025364 AMAQI

18°C15/25°C

20th Sep 2025345 AMAQI
20th Sep 2025366 AMAQI
20th Sep 2025387 AMAQI
20th Sep 2025428 AMAQI
20th Sep 2025409 AMAQI
20th Sep 20253910 AMAQI
20th Sep 20253911 AMAQI
20th Sep 20253812 PMAQI
20th Sep 2025381 PMAQI
20th Sep 2025422 PMAQI
20th Sep 2025403 PMAQI
20th Sep 2025394 PMAQI
20th Sep 2025405 PMAQI
20th Sep 2025446 PMAQI
20th Sep 2025407 PMAQI
20th Sep 2025408 PMAQI
20th Sep 2025389 PMAQI
20th Sep 20254210 PMAQI
20th Sep 20254611 PMAQI
21st Sep 20254112 AMAQI
21st Sep 2025411 AMAQI
21st Sep 2025412 AMAQI
21st Sep 2025353 AMAQI
21st Sep 2025344 AMAQI

19°C14/25°C

21st Sep 2025355 AMAQI
21st Sep 2025386 AMAQI
21st Sep 2025407 AMAQI
21st Sep 2025398 AMAQI
21st Sep 2025399 AMAQI
21st Sep 20254110 AMAQI
21st Sep 20253811 AMAQI
21st Sep 20253612 PMAQI
21st Sep 2025381 PMAQI
21st Sep 2025362 PMAQI
21st Sep 2025443 PMAQI
21st Sep 2025434 PMAQI
21st Sep 2025425 PMAQI
21st Sep 2025426 PMAQI
21st Sep 2025447 PMAQI
21st Sep 2025418 PMAQI
21st Sep 2025439 PMAQI
21st Sep 20254410 PMAQI
21st Sep 20254211 PMAQI
22nd Sep 20254012 AMAQI
22nd Sep 2025401 AMAQI
22nd Sep 2025402 AMAQI
22nd Sep 2025383 AMAQI
22nd Sep 2025324 AMAQI

19°C14/26°C

22nd Sep 2025355 AMAQI
22nd Sep 2025386 AMAQI
22nd Sep 2025357 AMAQI
22nd Sep 2025408 AMAQI
22nd Sep 2025399 AMAQI
22nd Sep 20254010 AMAQI
22nd Sep 20253411 AMAQI
22nd Sep 20254212 PMAQI
22nd Sep 2025381 PMAQI
22nd Sep 2025402 PMAQI
22nd Sep 2025403 PMAQI
22nd Sep 2025414 PMAQI
22nd Sep 2025405 PMAQI
22nd Sep 2025386 PMAQI
22nd Sep 2025427 PMAQI
22nd Sep 2025388 PMAQI
22nd Sep 2025399 PMAQI
22nd Sep 20253910 PMAQI
22nd Sep 20254011 PMAQI
23rd Sep 20254012 AMAQI
23rd Sep 2025401 AMAQI
23rd Sep 2025372 AMAQI
23rd Sep 2025363 AMAQI
23rd Sep 2025324 AMAQI

19°C15/25°C

23rd Sep 2025385 AMAQI
23rd Sep 2025426 AMAQI
23rd Sep 2025407 AMAQI
23rd Sep 2025408 AMAQI
23rd Sep 2025419 AMAQI
23rd Sep 20254110 AMAQI
23rd Sep 20254011 AMAQI
23rd Sep 20253812 PMAQI
23rd Sep 2025401 PMAQI
23rd Sep 2025452 PMAQI
23rd Sep 2025463 PMAQI
23rd Sep 2025444 PMAQI
23rd Sep 2025455 PMAQI
23rd Sep 2025456 PMAQI
23rd Sep 2025427 PMAQI
23rd Sep 2025428 PMAQI
23rd Sep 2025429 PMAQI
23rd Sep 20254110 PMAQI
23rd Sep 20254511 PMAQI
24th Sep 20254812 AMAQI
24th Sep 2025451 AMAQI
24th Sep 2025362 AMAQI
24th Sep 2025363 AMAQI
24th Sep 2025384 AMAQI

19°C15/25°C

24th Sep 2025325 AMAQI
24th Sep 2025406 AMAQI
24th Sep 2025447 AMAQI
24th Sep 2025438 AMAQI
24th Sep 2025459 AMAQI
24th Sep 20254010 AMAQI
24th Sep 20253811 AMAQI
24th Sep 20254112 PMAQI
24th Sep 2025391 PMAQI
24th Sep 2025402 PMAQI
24th Sep 2025423 PMAQI
24th Sep 2025404 PMAQI
24th Sep 2025415 PMAQI
24th Sep 2025426 PMAQI
24th Sep 2025437 PMAQI
24th Sep 2025448 PMAQI
24th Sep 2025459 PMAQI
24th Sep 20254310 PMAQI
24th Sep 20254511 PMAQI

19°C15/27°C

25th Sep 20253311 AMAQI
25th Sep 20253312 PMAQI
25th Sep 2025331 PMAQI
25th Sep 2025322 PMAQI
25th Sep 2025303 PMAQI
25th Sep 2025284 PMAQI
25th Sep 2025285 PMAQI
25th Sep 2025276 PMAQI
25th Sep 2025257 PMAQI
25th Sep 2025278 PMAQI
25th Sep 2025289 PMAQI
25th Sep 20252810 PMAQI
25th Sep 20252811 PMAQI
26th Sep 20252912 AMAQI
26th Sep 2025301 AMAQI
26th Sep 2025302 AMAQI
26th Sep 2025323 AMAQI
26th Sep 2025324 AMAQI

19°C14/27°C

26th Sep 2025325 AMAQI
26th Sep 2025336 AMAQI
26th Sep 2025337 AMAQI
26th Sep 2025338 AMAQI
26th Sep 2025349 AMAQI
26th Sep 20253410 AMAQI
26th Sep 20253311 AMAQI
26th Sep 20253412 PMAQI
26th Sep 2025331 PMAQI
26th Sep 2025342 PMAQI
26th Sep 2025333 PMAQI
26th Sep 2025324 PMAQI
26th Sep 2025285 PMAQI
26th Sep 2025286 PMAQI
26th Sep 2025287 PMAQI
26th Sep 2025288 PMAQI
26th Sep 2025289 PMAQI
26th Sep 20252810 PMAQI
26th Sep 20253311 PMAQI
27th Sep 20253312 AMAQI
27th Sep 2025331 AMAQI
27th Sep 2025322 AMAQI
27th Sep 2025293 AMAQI
27th Sep 2025284 AMAQI

18°C15/24°C

27th Sep 2025315 AMAQI
27th Sep 2025336 AMAQI
27th Sep 2025337 AMAQI
27th Sep 2025338 AMAQI
27th Sep 2025269 AMAQI
27th Sep 20252510 AMAQI
27th Sep 20252911 AMAQI
27th Sep 20252812 PMAQI
27th Sep 2025331 PMAQI
27th Sep 2025332 PMAQI
27th Sep 2025333 PMAQI
27th Sep 2025334 PMAQI
27th Sep 2025335 PMAQI
27th Sep 2025286 PMAQI
27th Sep 2025217 PMAQI
27th Sep 2025178 PMAQI
27th Sep 2025179 PMAQI
27th Sep 20251710 PMAQI
27th Sep 20251711 PMAQI
28th Sep 20252312 AMAQI
28th Sep 2025251 AMAQI
28th Sep 2025282 AMAQI
28th Sep 2025283 AMAQI
28th Sep 2025234 AMAQI

18°C15/25°C

28th Sep 2025265 AMAQI
28th Sep 2025326 AMAQI
28th Sep 2025337 AMAQI
28th Sep 2025368 AMAQI
28th Sep 2025369 AMAQI
28th Sep 20253610 AMAQI
28th Sep 20253511 AMAQI
28th Sep 20253312 PMAQI
28th Sep 2025331 PMAQI
28th Sep 2025332 PMAQI
28th Sep 2025333 PMAQI
28th Sep 2025344 PMAQI
28th Sep 2025385 PMAQI
28th Sep 2025386 PMAQI
28th Sep 2025337 PMAQI
28th Sep 2025338 PMAQI
28th Sep 2025289 PMAQI
28th Sep 20252310 PMAQI
28th Sep 20254411 PMAQI
29th Sep 20253612 AMAQI
29th Sep 2025371 AMAQI
29th Sep 2025422 AMAQI
29th Sep 2025193 AMAQI
29th Sep 2025164 AMAQI

18°C15/24°C

29th Sep 2025385 AMAQI
29th Sep 2025366 AMAQI
29th Sep 2025317 AMAQI
29th Sep 2025328 AMAQI
29th Sep 2025349 AMAQI
29th Sep 20253310 AMAQI
29th Sep 20253111 AMAQI
29th Sep 20253012 PMAQI
29th Sep 2025301 PMAQI
29th Sep 2025202 PMAQI
29th Sep 2025203 PMAQI
29th Sep 2025204 PMAQI
29th Sep 2025215 PMAQI
29th Sep 2025376 PMAQI
29th Sep 2025467 PMAQI
29th Sep 2025358 PMAQI
29th Sep 2025339 PMAQI
29th Sep 20253010 PMAQI
29th Sep 20253411 PMAQI
30th Sep 20253012 AMAQI
30th Sep 2025281 AMAQI
30th Sep 2025392 AMAQI
30th Sep 2025423 AMAQI
30th Sep 2025404 AMAQI

18°C14/25°C

30th Sep 2025365 AMAQI
30th Sep 2025376 AMAQI
30th Sep 2025427 AMAQI
30th Sep 2025528 AMAQI
30th Sep 2025549 AMAQI
30th Sep 20255810 AMAQI
30th Sep 20256211 AMAQI
30th Sep 20256112 PMAQI
30th Sep 2025561 PMAQI
30th Sep 2025542 PMAQI
30th Sep 2025573 PMAQI
30th Sep 2025504 PMAQI
30th Sep 2025525 PMAQI
30th Sep 2025506 PMAQI
30th Sep 2025427 PMAQI
30th Sep 2025328 PMAQI
30th Sep 2025359 PMAQI
30th Sep 20253210 PMAQI
30th Sep 20252911 PMAQI
1st Oct 20253512 AMAQI
1st Oct 2025401 AMAQI
1st Oct 2025452 AMAQI
1st Oct 2025423 AMAQI
1st Oct 2025444 AMAQI

19°C15/25°C

1st Oct 2025525 AMAQI
1st Oct 2025536 AMAQI
1st Oct 2025547 AMAQI
1st Oct 2025488 AMAQI
1st Oct 2025479 AMAQI
1st Oct 20253610 AMAQI
1st Oct 20253011 AMAQI
1st Oct 20253112 PMAQI
1st Oct 2025381 PMAQI
1st Oct 2025412 PMAQI
1st Oct 2025463 PMAQI
1st Oct 2025474 PMAQI
1st Oct 2025485 PMAQI
1st Oct 2025406 PMAQI
1st Oct 2025407 PMAQI
1st Oct 2025648 PMAQI
1st Oct 2025799 PMAQI
1st Oct 20257810 PMAQI
1st Oct 20257211 PMAQI
2nd Oct 20257212 AMAQI
2nd Oct 2025681 AMAQI
2nd Oct 2025642 AMAQI
2nd Oct 2025623 AMAQI
2nd Oct 2025614 AMAQI

18°C14/26°C

2nd Oct 2025625 AMAQI
2nd Oct 2025626 AMAQI
2nd Oct 2025577 AMAQI
2nd Oct 2025528 AMAQI
2nd Oct 2025459 AMAQI
2nd Oct 20254010 AMAQI
2nd Oct 20253811 AMAQI
2nd Oct 20253812 PMAQI
2nd Oct 2025341 PMAQI
2nd Oct 2025302 PMAQI
2nd Oct 2025353 PMAQI
2nd Oct 2025394 PMAQI
2nd Oct 2025515 PMAQI
2nd Oct 2025596 PMAQI
2nd Oct 2025607 PMAQI
2nd Oct 2025638 PMAQI
2nd Oct 2025669 PMAQI
2nd Oct 20256810 PMAQI
2nd Oct 20256911 PMAQI
3rd Oct 20256812 AMAQI
3rd Oct 2025661 AMAQI
3rd Oct 2025642 AMAQI
3rd Oct 2025643 AMAQI
3rd Oct 2025634 AMAQI

18°C14/25°C

3rd Oct 2025545 AMAQI
3rd Oct 2025666 AMAQI
3rd Oct 2025627 AMAQI
3rd Oct 2025548 AMAQI
3rd Oct 2025409 AMAQI
3rd Oct 20253710 AMAQI
3rd Oct 20253911 AMAQI
3rd Oct 20254712 PMAQI
3rd Oct 2025541 PMAQI
3rd Oct 2025532 PMAQI
3rd Oct 2025473 PMAQI
3rd Oct 2025384 PMAQI
3rd Oct 2025485 PMAQI
3rd Oct 2025586 PMAQI
3rd Oct 2025607 PMAQI
3rd Oct 2025518 PMAQI
3rd Oct 2025469 PMAQI
3rd Oct 20255410 PMAQI
3rd Oct 20255611 PMAQI
4th Oct 20255812 AMAQI
4th Oct 2025541 AMAQI
4th Oct 2025562 AMAQI
4th Oct 2025513 AMAQI
4th Oct 2025504 AMAQI

18°C14/25°C

4th Oct 2025535 AMAQI
4th Oct 2025586 AMAQI
4th Oct 2025417 AMAQI
4th Oct 2025438 AMAQI
4th Oct 2025389 AMAQI
4th Oct 20253110 AMAQI
4th Oct 20253711 AMAQI
4th Oct 20254412 PMAQI
4th Oct 2025491 PMAQI
4th Oct 2025472 PMAQI
4th Oct 2025383 PMAQI
4th Oct 2025364 PMAQI
4th Oct 2025395 PMAQI
4th Oct 2025536 PMAQI
4th Oct 2025537 PMAQI
4th Oct 2025558 PMAQI
4th Oct 2025479 PMAQI
4th Oct 20254410 PMAQI
4th Oct 20255011 PMAQI
5th Oct 20255412 AMAQI
5th Oct 2025521 AMAQI
5th Oct 2025522 AMAQI
5th Oct 2025523 AMAQI
5th Oct 2025534 AMAQI

18°C14/24°C

5th Oct 2025545 AMAQI
5th Oct 2025536 AMAQI
5th Oct 2025577 AMAQI
5th Oct 2025558 AMAQI
5th Oct 2025539 AMAQI
5th Oct 20255310 AMAQI
5th Oct 20255211 AMAQI
5th Oct 20254912 PMAQI
5th Oct 2025531 PMAQI
5th Oct 2025522 PMAQI
5th Oct 2025533 PMAQI
5th Oct 2025444 PMAQI
5th Oct 2025485 PMAQI
5th Oct 2025536 PMAQI
5th Oct 2025587 PMAQI
5th Oct 2025638 PMAQI
5th Oct 2025649 PMAQI
5th Oct 20256310 PMAQI
5th Oct 20256211 PMAQI
6th Oct 20255612 AMAQI
6th Oct 2025581 AMAQI
6th Oct 2025562 AMAQI
6th Oct 2025563 AMAQI
6th Oct 2025554 AMAQI

17°C15/20°C

6th Oct 2025545 AMAQI
6th Oct 2025566 AMAQI
6th Oct 2025507 AMAQI
6th Oct 2025398 AMAQI
6th Oct 2025669 AMAQI
6th Oct 20254110 AMAQI
6th Oct 20253711 AMAQI

18°C14/25°C

7th Oct 2025305 AMAQI
7th Oct 2025496 AMAQI
7th Oct 2025657 AMAQI
7th Oct 2025578 AMAQI
7th Oct 2025559 AMAQI
7th Oct 20255410 AMAQI
7th Oct 20255111 AMAQI
7th Oct 20255312 PMAQI
7th Oct 2025541 PMAQI
7th Oct 2025552 PMAQI
7th Oct 2025543 PMAQI
7th Oct 2025534 PMAQI
7th Oct 2025535 PMAQI
7th Oct 2025566 PMAQI
7th Oct 2025567 PMAQI
7th Oct 2025648 PMAQI
7th Oct 2025729 PMAQI
7th Oct 20257010 PMAQI
7th Oct 20257011 PMAQI
8th Oct 20256512 AMAQI
8th Oct 2025691 AMAQI
8th Oct 2025622 AMAQI
8th Oct 2025623 AMAQI
8th Oct 2025594 AMAQI

19°C15/25°C

8th Oct 2025545 AMAQI
8th Oct 2025586 AMAQI
8th Oct 2025557 AMAQI
8th Oct 2025408 AMAQI
8th Oct 2025499 AMAQI
8th Oct 20254910 AMAQI
8th Oct 20253811 AMAQI
8th Oct 20254112 PMAQI
8th Oct 2025401 PMAQI
8th Oct 2025422 PMAQI
8th Oct 2025403 PMAQI
8th Oct 2025484 PMAQI
8th Oct 2025525 PMAQI
8th Oct 2025626 PMAQI
8th Oct 2025667 PMAQI
8th Oct 2025688 PMAQI
8th Oct 2025689 PMAQI
8th Oct 20257010 PMAQI
8th Oct 20257511 PMAQI
9th Oct 20257312 AMAQI
9th Oct 2025761 AMAQI
9th Oct 2025762 AMAQI
9th Oct 2025713 AMAQI
9th Oct 2025724 AMAQI

18°C13/26°C

9th Oct 2025665 AMAQI
9th Oct 2025586 AMAQI
9th Oct 2025637 AMAQI
9th Oct 2025608 AMAQI
9th Oct 2025589 AMAQI
9th Oct 20255710 AMAQI
9th Oct 20255611 AMAQI
9th Oct 20255712 PMAQI
9th Oct 2025591 PMAQI
9th Oct 2025582 PMAQI
9th Oct 2025573 PMAQI
9th Oct 2025564 PMAQI
9th Oct 2025595 PMAQI
9th Oct 2025646 PMAQI
9th Oct 2025567 PMAQI
9th Oct 2025548 PMAQI
9th Oct 2025549 PMAQI
9th Oct 20255710 PMAQI
9th Oct 20256011 PMAQI
10th Oct 20256112 AMAQI
10th Oct 2025611 AMAQI
10th Oct 2025562 AMAQI
10th Oct 2025553 AMAQI
10th Oct 2025554 AMAQI

18°C14/23°C

10th Oct 2025545 AMAQI
10th Oct 2025556 AMAQI
10th Oct 2025547 AMAQI
10th Oct 2025558 AMAQI
10th Oct 2025539 AMAQI
10th Oct 20254910 AMAQI
10th Oct 20254211 AMAQI
10th Oct 20254612 PMAQI
10th Oct 2025471 PMAQI
10th Oct 2025552 PMAQI
10th Oct 2025553 PMAQI
10th Oct 2025404 PMAQI
10th Oct 2025345 PMAQI
10th Oct 2025576 PMAQI
10th Oct 2025437 PMAQI
10th Oct 2025458 PMAQI
10th Oct 2025389 PMAQI
10th Oct 20252610 PMAQI
10th Oct 20253211 PMAQI
11th Oct 20253012 AMAQI
11th Oct 2025341 AMAQI
11th Oct 2025352 AMAQI
11th Oct 2025333 AMAQI
11th Oct 2025224 AMAQI

18°C14/23°C

11th Oct 2025465 AMAQI
11th Oct 2025506 AMAQI
11th Oct 2025227 AMAQI
11th Oct 2025358 AMAQI
11th Oct 2025549 AMAQI
11th Oct 20255510 AMAQI
11th Oct 20252311 AMAQI
11th Oct 20253512 PMAQI
11th Oct 2025261 PMAQI
11th Oct 2025222 PMAQI
11th Oct 2025503 PMAQI
11th Oct 2025384 PMAQI
11th Oct 2025515 PMAQI
11th Oct 2025506 PMAQI
11th Oct 2025407 PMAQI
11th Oct 2025428 PMAQI
11th Oct 2025499 PMAQI
11th Oct 20253710 PMAQI
11th Oct 20254011 PMAQI
12th Oct 20254012 AMAQI
12th Oct 2025381 AMAQI
12th Oct 2025322 AMAQI
12th Oct 2025393 AMAQI
12th Oct 2025364 AMAQI

17°C14/20°C

12th Oct 2025375 AMAQI
12th Oct 2025366 AMAQI
12th Oct 2025387 AMAQI
12th Oct 2025348 AMAQI
12th Oct 2025479 AMAQI
12th Oct 20254510 AMAQI
12th Oct 20253711 AMAQI
12th Oct 20253512 PMAQI
12th Oct 2025371 PMAQI
12th Oct 2025352 PMAQI
12th Oct 2025393 PMAQI
12th Oct 2025374 PMAQI
12th Oct 2025425 PMAQI
12th Oct 2025416 PMAQI
12th Oct 2025387 PMAQI
12th Oct 2025538 PMAQI
12th Oct 2025589 PMAQI
12th Oct 20255710 PMAQI
12th Oct 20255711 PMAQI
13th Oct 20255612 AMAQI
13th Oct 2025541 AMAQI
13th Oct 2025562 AMAQI
13th Oct 2025533 AMAQI
13th Oct 2025514 AMAQI

17°C14/22°C

13th Oct 2025495 AMAQI
13th Oct 2025516 AMAQI
13th Oct 2025547 AMAQI
13th Oct 2025438 AMAQI
13th Oct 2025439 AMAQI
13th Oct 20253710 AMAQI
13th Oct 20254011 AMAQI
13th Oct 20254012 PMAQI
13th Oct 2025401 PMAQI
13th Oct 2025372 PMAQI
13th Oct 2025453 PMAQI
13th Oct 2025574 PMAQI
13th Oct 2025635 PMAQI
13th Oct 2025646 PMAQI
13th Oct 2025577 PMAQI
13th Oct 2025528 PMAQI
13th Oct 2025559 PMAQI
13th Oct 20255510 PMAQI
13th Oct 20255911 PMAQI
14th Oct 20256112 AMAQI
14th Oct 2025591 AMAQI
14th Oct 2025552 AMAQI
14th Oct 2025553 AMAQI
14th Oct 2025544 AMAQI

18°C14/24°C

14th Oct 2025545 AMAQI
14th Oct 2025566 AMAQI
14th Oct 2025647 AMAQI
14th Oct 2025558 AMAQI
14th Oct 2025469 AMAQI
14th Oct 20254210 AMAQI
14th Oct 20254811 AMAQI
14th Oct 20255112 PMAQI
14th Oct 2025561 PMAQI
14th Oct 2025562 PMAQI
14th Oct 2025583 PMAQI
14th Oct 2025594 PMAQI
14th Oct 2025655 PMAQI
14th Oct 2025666 PMAQI
14th Oct 2025637 PMAQI
14th Oct 2025648 PMAQI
14th Oct 2025569 PMAQI
14th Oct 20255810 PMAQI
14th Oct 20256111 PMAQI
15th Oct 20256212 AMAQI
15th Oct 2025631 AMAQI
15th Oct 2025632 AMAQI
15th Oct 2025593 AMAQI
15th Oct 2025574 AMAQI

18°C15/24°C

15th Oct 2025605 AMAQI
15th Oct 2025596 AMAQI
15th Oct 2025637 AMAQI
15th Oct 2025578 AMAQI
15th Oct 2025529 AMAQI
15th Oct 20254810 AMAQI
15th Oct 20255011 AMAQI
15th Oct 20255212 PMAQI
15th Oct 2025541 PMAQI
15th Oct 2025532 PMAQI
15th Oct 2025553 PMAQI
15th Oct 2025534 PMAQI
15th Oct 2025405 PMAQI
15th Oct 2025406 PMAQI
15th Oct 2025507 PMAQI
15th Oct 2025538 PMAQI
15th Oct 2025589 PMAQI
15th Oct 20256310 PMAQI
15th Oct 20256611 PMAQI
16th Oct 20257312 AMAQI
16th Oct 2025741 AMAQI
16th Oct 2025682 AMAQI
16th Oct 2025683 AMAQI
16th Oct 2025664 AMAQI

18°C14/25°C

16th Oct 2025695 AMAQI
16th Oct 2025716 AMAQI
16th Oct 2025697 AMAQI
16th Oct 2025578 AMAQI
16th Oct 2025519 AMAQI
16th Oct 20255010 AMAQI
16th Oct 20254811 AMAQI
16th Oct 20254712 PMAQI
16th Oct 2025501 PMAQI
16th Oct 2025542 PMAQI
16th Oct 2025513 PMAQI
16th Oct 2025474 PMAQI
16th Oct 2025445 PMAQI
16th Oct 2025486 PMAQI
16th Oct 2025497 PMAQI
16th Oct 2025518 PMAQI
16th Oct 2025529 PMAQI
16th Oct 20255810 PMAQI
16th Oct 20255711 PMAQI
17th Oct 20255512 AMAQI
17th Oct 2025551 AMAQI
17th Oct 2025542 AMAQI
17th Oct 2025453 AMAQI
17th Oct 2025394 AMAQI

17°C14/23°C

17th Oct 2025375 AMAQI
17th Oct 2025486 AMAQI
17th Oct 2025537 AMAQI
17th Oct 2025518 AMAQI
17th Oct 2025489 AMAQI
17th Oct 20254010 AMAQI
17th Oct 20253911 AMAQI
17th Oct 20254112 PMAQI
17th Oct 2025421 PMAQI
17th Oct 2025502 PMAQI
17th Oct 2025473 PMAQI
17th Oct 2025514 PMAQI
17th Oct 2025405 PMAQI
17th Oct 2025386 PMAQI
17th Oct 2025487 PMAQI
17th Oct 2025548 PMAQI
17th Oct 2025409 PMAQI
17th Oct 20254010 PMAQI
17th Oct 20254411 PMAQI
18th Oct 20253512 AMAQI
18th Oct 2025481 AMAQI
18th Oct 2025462 AMAQI
18th Oct 2025433 AMAQI
18th Oct 2025424 AMAQI

17°C14/22°C

18th Oct 2025365 AMAQI
5 AM
18th Oct 2025456 AMAQI
18th Oct 2025547 AMAQI
18th Oct 2025518 AMAQI
18th Oct 2025429 AMAQI
18th Oct 20253910 AMAQI
18th Oct 20253911 AMAQI
11 AM
18th Oct 20253812 PMAQI
18th Oct 2025451 PMAQI
18th Oct 2025482 PMAQI
5 PM
11 PM
4 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

47AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
11 AM - 4 PM

42AQI

6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 47), while the lowest AQI was between 11 AM to 4 PM (Avg. 42).
Night time
Avg. Highest Time
12 AM - 1 AM

49AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
4 AM

43AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 49), while the lowest AQI was between 4 AM to 4 AM (Avg. 43).

2025 Days Vs Air Quality

Monterrey, San Pedro, San Jose, Costa Rica

2025

88%

125

12%

17

Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)

Good
125 Days
Moderate
17 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 88%

Health Risk Level:

Low

In 2025, 88% of 291 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

Monterrey, San Pedro, San Jose, Costa Rica

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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
2nd January 2025
3rd January 2025
4th January 2025
5th January 2025
6th January 2025
7th January 2025
8th January 2025
9th January 2025
10th January 2025
11th January 2025
12th January 2025
13th January 2025
14th January 2025
15th January 2025
16th January 2025
17th January 2025
18th January 2025
19th January 2025
20th January 2025
21st January 2025
22nd January 2025
23rd January 2025
24th January 2025
25th January 2025
26th January 2025
27th January 2025
28th January 2025
29th January 2025
30th January 2025
31st January 2025
1st February 2025
2nd February 2025
3rd February 2025
4th February 2025
5th February 2025
6th February 2025
7th February 2025
8th February 2025
9th February 2025
10th February 2025
11th February 2025
12th February 2025
13th February 2025
14th February 2025
15th February 2025
16th February 2025
17th February 2025
18th February 2025
19th February 2025
20th February 2025
21st February 2025
22nd February 2025
23rd February 2025
24th February 2025
25th February 2025
26th February 2025
27th February 2025
28th February 2025
1st March 2025
2nd March 2025
3rd March 2025
4th March 2025
5th March 2025
6th March 2025
7th March 2025
8th March 2025
9th March 2025
10th March 2025
11th March 2025
12th March 2025
13th March 2025
14th March 2025
15th March 2025
16th March 2025
17th March 2025
18th March 2025
19th March 2025
20th March 2025
21st March 2025
22nd March 2025
23rd March 2025
24th March 2025
25th March 2025
26th March 2025
27th March 2025
28th March 2025
29th March 2025
30th March 2025
31st March 2025
1st April 2025
2nd April 2025
3rd April 2025
4th April 2025
5th April 2025
6th April 2025
7th April 2025
8th April 2025
9th April 2025
10th April 2025
11th April 2025
12th April 2025
13th April 2025
14th April 2025
15th April 2025
16th April 2025
17th April 2025
18th April 2025
19th April 2025
20th April 2025
21st April 2025
22nd April 2025
23rd April 2025
24th April 2025
25th April 2025
26th April 2025
27th April 2025
28th April 2025
29th April 2025
30th April 2025
1st May 2025
2nd May 2025
3rd May 2025
4th May 2025
5th May 2025
6th May 2025
7th May 2025
8th May 2025
9th May 2025
10th May 2025
11th May 2025
12th May 2025
13th May 2025
14th May 2025
15th May 2025
16th May 2025
17th May 2025
18th May 2025
19th May 2025
20th May 2025
21st May 2025
22nd May 2025
23rd May 2025
24th May 2025
25th May 2025
26th May 2025
27th May 2025
28th May 2025
29th May 2025
41AQI
30th May 2025
42AQI
31st May 2025
44AQI
1st June 2025
40AQI
2nd June 2025
43AQI
3rd June 2025
41AQI
4th June 2025
43AQI
5th June 2025
44AQI
6th June 2025
37AQI
7th June 2025
36AQI
8th June 2025
37AQI
9th June 2025
36AQI
10th June 2025
40AQI
11th June 2025
40AQI
12th June 2025
42AQI
13th June 2025
43AQI
14th June 2025
44AQI
15th June 2025
43AQI
16th June 2025
42AQI
17th June 2025
44AQI
18th June 2025
43AQI
19th June 2025
41AQI
20th June 2025
38AQI
21st June 2025
36AQI
22nd June 2025
33AQI
23rd June 2025
34AQI
24th June 2025
40AQI
25th June 2025
39AQI
26th June 2025
37AQI
27th June 2025
35AQI
28th June 2025
37AQI
29th June 2025
37AQI
30th June 2025
36AQI
1st July 2025
36AQI
2nd July 2025
32AQI
3rd July 2025
34AQI
4th July 2025
35AQI
5th July 2025
38AQI
6th July 2025
41AQI
7th July 2025
41AQI
8th July 2025
41AQI
9th July 2025
45AQI
10th July 2025
35AQI
11th July 2025
44AQI
12th July 2025
43AQI
13th July 2025
47AQI
14th July 2025
38AQI
15th July 2025
37AQI
16th July 2025
37AQI
17th July 2025
36AQI
18th July 2025
32AQI
19th July 2025
35AQI
20th July 2025
37AQI
21st July 2025
38AQI
22nd July 2025
36AQI
23rd July 2025
40AQI
24th July 2025
37AQI
25th July 2025
35AQI
26th July 2025
37AQI
27th July 2025
34AQI
28th July 2025
31AQI
29th July 2025
31AQI
30th July 2025
35AQI
31st July 2025
41AQI
1st August 2025
48AQI
2nd August 2025
48AQI
3rd August 2025
35AQI
4th August 2025
30AQI
5th August 2025
40AQI
6th August 2025
42AQI
7th August 2025
31AQI
8th August 2025
32AQI
9th August 2025
43AQI
10th August 2025
38AQI
11th August 2025
38AQI
12th August 2025
34AQI
13th August 2025
42AQI
14th August 2025
51AQI
15th August 2025
47AQI
16th August 2025
49AQI
17th August 2025
44AQI
18th August 2025
41AQI
19th August 2025
46AQI
20th August 2025
49AQI
21st August 2025
42AQI
22nd August 2025
46AQI
23rd August 2025
55AQI
24th August 2025
43AQI
25th August 2025
38AQI
26th August 2025
43AQI
27th August 2025
42AQI
28th August 2025
44AQI
29th August 2025
52AQI
30th August 2025
52AQI
31st August 2025
49AQI
1st September 2025
36AQI
2nd September 2025
39AQI
3rd September 2025
46AQI
4th September 2025
36AQI
5th September 2025
51AQI
6th September 2025
49AQI
7th September 2025
37AQI
8th September 2025
49AQI
9th September 2025
43AQI
10th September 2025
40AQI
11th September 2025
38AQI
12th September 2025
46AQI
13th September 2025
44AQI
14th September 2025
50AQI
15th September 2025
47AQI
16th September 2025
51AQI
17th September 2025
47AQI
18th September 2025
38AQI
19th September 2025
41AQI
20th September 2025
39AQI
21st September 2025
40AQI
22nd September 2025
39AQI
23rd September 2025
40AQI
24th September 2025
41AQI
25th September 2025
29AQI
26th September 2025
31AQI
27th September 2025
28AQI
28th September 2025
31AQI
29th September 2025
32AQI
30th September 2025
41AQI
1st October 2025
45AQI
2nd October 2025
57AQI
3rd October 2025
55AQI
4th October 2025
48AQI
5th October 2025
53AQI
6th October 2025
56AQI
7th October 2025
58AQI
8th October 2025
58AQI
9th October 2025
63AQI
10th October 2025
49AQI
11th October 2025
39AQI
12th October 2025
42AQI
13th October 2025
52AQI
14th October 2025
57AQI
15th October 2025
56AQI
16th October 2025
58AQI
17th October 2025
46AQI
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

42AQI

39AQI

37AQI

43AQI

41AQI

52AQI

No. of days

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

202542AQI

3
30
31
27
4
28
2
6
11
125
17

Highest AQI recorded in

October

52AQI

Lowest AQI recorded in

July

37AQI

Most & Least Polluted Years Over the Last 1 Years

Most Polluted Year Recorded
2025(Avg.)
42AQI
Least Polluted Year Recorded
2025(Avg.)
42AQI

Monterrey's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .