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
2nd Oct 2025
57AQILowest AQI recorded on
1st Oct 2025
45AQISame Day Analysis (3rd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 55 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Monterrey, San Pedro, San Jose, Costa Rica
AQI
Day
Night
.
5 AM3rd Oct 2025
5 PM
4 AM4th Oct 2025
Day time
Avg. Highest Time
6AM3rd Oct
66AQI
Avg. Lowest Time
10AM3rd Oct
37AQI
Night time
Avg. Highest Time
7PM3rd Oct
60AQI
Avg. Lowest Time
9PM3rd Oct
46AQI
In the last 24 hours,
Monterrey's AQI reached its highest point of 66 at 6 AM during the Day, while the lowest point, 37, was recorded at 10 AM during the Day between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Monterrey, San Pedro, San Jose, Costa Rica
SepOct
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th
Day
Night
4th Sep 20254310 AMAQI
4th Sep 20254411 AMAQI
4th Sep 20254212 PMAQI
4th Sep 2025471 PMAQI
4th Sep 2025322 PMAQI
4th Sep 2025283 PMAQI
4th Sep 2025284 PMAQI
4th Sep 2025265 PMAQI
4th Sep 2025286 PMAQI
4th Sep 2025297 PMAQI
4th Sep 2025318 PMAQI
4th Sep 2025339 PMAQI
4th Sep 20253710 PMAQI
4th Sep 20255111 PMAQI
5th Sep 20254912 AMAQI
5th Sep 2025511 AMAQI
5th Sep 2025512 AMAQI
5th Sep 2025413 AMAQI
5th Sep 2025464 AMAQI
--°C/°C
5th Sep 2025455 AMAQI
5th Sep 2025526 AMAQI
5th Sep 2025507 AMAQI
5th Sep 2025528 AMAQI
5th Sep 2025569 AMAQI
5th Sep 20255410 AMAQI
5th Sep 20255711 AMAQI
5th Sep 20255312 PMAQI
5th Sep 2025531 PMAQI
5th Sep 2025482 PMAQI
5th Sep 2025473 PMAQI
5th Sep 2025444 PMAQI
5th Sep 2025505 PMAQI
5th Sep 2025456 PMAQI
5th Sep 2025487 PMAQI
5th Sep 2025548 PMAQI
5th Sep 2025549 PMAQI
5th Sep 20255610 PMAQI
5th Sep 20255211 PMAQI
6th Sep 20255412 AMAQI
6th Sep 2025531 AMAQI
6th Sep 2025522 AMAQI
6th Sep 2025543 AMAQI
6th Sep 2025524 AMAQI
17°C14/21°C
6th Sep 2025525 AMAQI
6th Sep 2025536 AMAQI
6th Sep 2025527 AMAQI
6th Sep 2025528 AMAQI
6th Sep 2025519 AMAQI
6th Sep 20255410 AMAQI
6th Sep 20255411 AMAQI
6th Sep 20255612 PMAQI
6th Sep 2025561 PMAQI
6th Sep 2025452 PMAQI
6th Sep 2025343 PMAQI
6th Sep 2025374 PMAQI
6th Sep 2025385 PMAQI
6th Sep 2025496 PMAQI
6th Sep 2025487 PMAQI
6th Sep 2025438 PMAQI
6th Sep 2025429 PMAQI
6th Sep 20254410 PMAQI
6th Sep 20255111 PMAQI
7th Sep 20254212 AMAQI
7th Sep 2025401 AMAQI
7th Sep 2025402 AMAQI
7th Sep 2025393 AMAQI
7th Sep 2025354 AMAQI
18°C14/25°C
7th Sep 2025365 AMAQI
7th Sep 2025396 AMAQI
7th Sep 2025357 AMAQI
7th Sep 2025278 AMAQI
7th Sep 2025289 AMAQI
7th Sep 20252610 AMAQI
7th Sep 20252911 AMAQI
7th Sep 20253212 PMAQI
7th Sep 2025321 PMAQI
7th Sep 2025332 PMAQI
7th Sep 2025363 PMAQI
7th Sep 2025344 PMAQI
7th Sep 2025385 PMAQI
7th Sep 2025366 PMAQI
7th Sep 2025397 PMAQI
7th Sep 2025438 PMAQI
7th Sep 2025479 PMAQI
7th Sep 20255010 PMAQI
7th Sep 20253811 PMAQI
8th Sep 20255712 AMAQI
8th Sep 2025501 AMAQI
8th Sep 2025522 AMAQI
8th Sep 2025483 AMAQI
8th Sep 2025644 AMAQI
17°C14/23°C
8th Sep 2025495 AMAQI
8th Sep 2025476 AMAQI
8th Sep 2025507 AMAQI
8th Sep 2025538 AMAQI
8th Sep 2025529 AMAQI
8th Sep 20255510 AMAQI
8th Sep 20255411 AMAQI
8th Sep 20254812 PMAQI
8th Sep 2025481 PMAQI
8th Sep 2025522 PMAQI
8th Sep 2025513 PMAQI
8th Sep 2025534 PMAQI
8th Sep 2025495 PMAQI
8th Sep 2025466 PMAQI
8th Sep 2025417 PMAQI
8th Sep 2025468 PMAQI
8th Sep 2025399 PMAQI
8th Sep 20253810 PMAQI
8th Sep 20254511 PMAQI
9th Sep 20254012 AMAQI
9th Sep 2025401 AMAQI
9th Sep 2025412 AMAQI
9th Sep 2025403 AMAQI
9th Sep 2025464 AMAQI
17°C14/23°C
9th Sep 2025555 AMAQI
9th Sep 2025546 AMAQI
9th Sep 2025587 AMAQI
9th Sep 2025488 AMAQI
9th Sep 2025529 AMAQI
9th Sep 20255010 AMAQI
9th Sep 20254411 AMAQI
9th Sep 20254312 PMAQI
9th Sep 2025441 PMAQI
9th Sep 2025432 PMAQI
9th Sep 2025403 PMAQI
9th Sep 2025354 PMAQI
9th Sep 2025325 PMAQI
9th Sep 2025406 PMAQI
9th Sep 2025427 PMAQI
9th Sep 2025408 PMAQI
9th Sep 2025469 PMAQI
9th Sep 20253610 PMAQI
9th Sep 20254011 PMAQI
10th Sep 20253912 AMAQI
10th Sep 2025381 AMAQI
10th Sep 2025462 AMAQI
10th Sep 2025383 AMAQI
10th Sep 2025464 AMAQI
18°C14/24°C
10th Sep 2025425 AMAQI
10th Sep 2025426 AMAQI
10th Sep 2025507 AMAQI
10th Sep 2025498 AMAQI
10th Sep 2025489 AMAQI
10th Sep 20254910 AMAQI
10th Sep 20254611 AMAQI
10th Sep 20254212 PMAQI
10th Sep 2025421 PMAQI
10th Sep 2025402 PMAQI
10th Sep 2025363 PMAQI
10th Sep 2025394 PMAQI
10th Sep 2025365 PMAQI
10th Sep 2025446 PMAQI
10th Sep 2025407 PMAQI
10th Sep 2025348 PMAQI
10th Sep 2025329 PMAQI
10th Sep 20253010 PMAQI
10th Sep 20253311 PMAQI
11th Sep 20253712 AMAQI
11th Sep 2025261 AMAQI
11th Sep 2025282 AMAQI
11th Sep 2025333 AMAQI
11th Sep 2025304 AMAQI
19°C15/27°C
11th Sep 2025305 AMAQI
11th Sep 2025396 AMAQI
11th Sep 2025427 AMAQI
11th Sep 2025398 AMAQI
11th Sep 2025369 AMAQI
11th Sep 20253910 AMAQI
11th Sep 20255211 AMAQI
11th Sep 20255112 PMAQI
11th Sep 2025511 PMAQI
11th Sep 2025502 PMAQI
11th Sep 2025483 PMAQI
11th Sep 2025494 PMAQI
11th Sep 2025435 PMAQI
11th Sep 2025376 PMAQI
11th Sep 2025387 PMAQI
11th Sep 2025378 PMAQI
11th Sep 2025359 PMAQI
11th Sep 20254810 PMAQI
11th Sep 20254711 PMAQI
12th Sep 20254612 AMAQI
12th Sep 2025451 AMAQI
12th Sep 2025372 AMAQI
12th Sep 2025403 AMAQI
12th Sep 2025424 AMAQI
19°C15/25°C
12th Sep 2025505 AMAQI
12th Sep 2025556 AMAQI
12th Sep 2025547 AMAQI
12th Sep 2025508 AMAQI
12th Sep 2025559 AMAQI
12th Sep 20254910 AMAQI
12th Sep 20254411 AMAQI
12th Sep 20254512 PMAQI
12th Sep 2025531 PMAQI
12th Sep 2025522 PMAQI
12th Sep 2025463 PMAQI
12th Sep 2025424 PMAQI
12th Sep 2025405 PMAQI
12th Sep 2025496 PMAQI
12th Sep 2025477 PMAQI
12th Sep 2025468 PMAQI
12th Sep 2025509 PMAQI
12th Sep 20255110 PMAQI
12th Sep 20254011 PMAQI
13th Sep 20254612 AMAQI
13th Sep 2025511 AMAQI
13th Sep 2025382 AMAQI
13th Sep 2025313 AMAQI
13th Sep 2025314 AMAQI
18°C14/25°C
13th Sep 2025425 AMAQI
13th Sep 2025506 AMAQI
13th Sep 2025557 AMAQI
13th Sep 2025488 AMAQI
13th Sep 2025489 AMAQI
13th Sep 20254510 AMAQI
13th Sep 20254411 AMAQI
13th Sep 20254112 PMAQI
13th Sep 2025441 PMAQI
13th Sep 2025462 PMAQI
13th Sep 2025423 PMAQI
13th Sep 2025464 PMAQI
13th Sep 2025485 PMAQI
13th Sep 2025476 PMAQI
13th Sep 2025457 PMAQI
13th Sep 2025508 PMAQI
13th Sep 2025509 PMAQI
13th Sep 20254810 PMAQI
13th Sep 20254811 PMAQI
14th Sep 20254812 AMAQI
14th Sep 2025511 AMAQI
14th Sep 2025522 AMAQI
14th Sep 2025503 AMAQI
14th Sep 2025504 AMAQI
18°C14/24°C
14th Sep 2025545 AMAQI
14th Sep 2025576 AMAQI
14th Sep 2025587 AMAQI
14th Sep 2025568 AMAQI
14th Sep 2025529 AMAQI
14th Sep 20255010 AMAQI
14th Sep 20254111 AMAQI
14th Sep 20254012 PMAQI
14th Sep 2025531 PMAQI
14th Sep 2025572 PMAQI
14th Sep 2025573 PMAQI
14th Sep 2025544 PMAQI
14th Sep 2025575 PMAQI
14th Sep 2025466 PMAQI
14th Sep 2025487 PMAQI
14th Sep 2025508 PMAQI
14th Sep 2025539 PMAQI
14th Sep 20254610 PMAQI
14th Sep 20254811 PMAQI
15th Sep 20254712 AMAQI
15th Sep 2025501 AMAQI
15th Sep 2025422 AMAQI
15th Sep 2025463 AMAQI
15th Sep 2025424 AMAQI
19°C14/27°C
15th Sep 2025485 AMAQI
15th Sep 2025466 AMAQI
15th Sep 2025507 AMAQI
15th Sep 2025608 AMAQI
15th Sep 2025529 AMAQI
15th Sep 20254910 AMAQI
15th Sep 20254811 AMAQI
15th Sep 20254812 PMAQI
15th Sep 2025441 PMAQI
15th Sep 2025442 PMAQI
15th Sep 2025513 PMAQI
15th Sep 2025434 PMAQI
15th Sep 2025475 PMAQI
15th Sep 2025486 PMAQI
15th Sep 2025477 PMAQI
15th Sep 2025428 PMAQI
15th Sep 2025509 PMAQI
15th Sep 20254810 PMAQI
15th Sep 20254811 PMAQI
16th Sep 20255012 AMAQI
16th Sep 2025551 AMAQI
16th Sep 2025532 AMAQI
16th Sep 2025523 AMAQI
16th Sep 2025494 AMAQI
18°C16/23°C
16th Sep 2025455 AMAQI
16th Sep 2025526 AMAQI
16th Sep 2025527 AMAQI
16th Sep 2025528 AMAQI
16th Sep 2025529 AMAQI
16th Sep 20255010 AMAQI
16th Sep 20255311 AMAQI
16th Sep 20255212 PMAQI
16th Sep 2025521 PMAQI
16th Sep 2025522 PMAQI
16th Sep 2025493 PMAQI
16th Sep 2025514 PMAQI
16th Sep 2025525 PMAQI
16th Sep 2025536 PMAQI
16th Sep 2025537 PMAQI
16th Sep 2025528 PMAQI
16th Sep 2025549 PMAQI
16th Sep 20255010 PMAQI
16th Sep 20254211 PMAQI
17th Sep 20254012 AMAQI
17th Sep 2025441 AMAQI
17th Sep 2025482 AMAQI
17th Sep 2025523 AMAQI
17th Sep 2025504 AMAQI
19°C16/25°C
17th Sep 2025565 AMAQI
17th Sep 2025666 AMAQI
17th Sep 2025437 AMAQI
17th Sep 2025418 AMAQI
17th Sep 2025419 AMAQI
17th Sep 20254210 AMAQI
17th Sep 20254011 AMAQI
17th Sep 20254312 PMAQI
17th Sep 2025421 PMAQI
17th Sep 2025462 PMAQI
17th Sep 2025473 PMAQI
17th Sep 2025474 PMAQI
17th Sep 2025485 PMAQI
17th Sep 2025496 PMAQI
17th Sep 2025487 PMAQI
17th Sep 2025468 PMAQI
17th Sep 2025489 PMAQI
17th Sep 20254610 PMAQI
17th Sep 20254911 PMAQI
18th Sep 20254612 AMAQI
18th Sep 2025461 AMAQI
18th Sep 2025332 AMAQI
18th Sep 2025303 AMAQI
18th Sep 2025304 AMAQI
18°C15/22°C
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
5 AM4th Oct 2025586 AMAQI
4th Oct 2025417 AMAQI
4th Oct 2025438 AMAQI
4th Oct 2025389 AMAQI
4th Oct 20253110 AMAQI
4th Oct 20253711 AMAQI
11 AM4th Oct 20254412 PMAQI
4th Oct 2025491 PMAQI
4th Oct 2025472 PMAQI
4th Oct 2025383 PMAQI
4th Oct 2025364 PMAQI
4th Oct 2025395 PMAQI
5 PM4th Oct 2025536 PMAQI
4th Oct 2025567 PMAQI
11 PM
4 AM
18°C14/24°C
Day time
Avg. Highest Time
6 AM - 8 AM
45AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
9 AM - 5 PM
42AQI
9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 8 AM (Avg. 45), while the lowest AQI was between 9 AM to 5 PM (Avg. 42).
Night time
Avg. Highest Time
12 AM - 2 AM
44AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
3 AM - 4 AM
41AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 2 AM (Avg. 44), while the lowest AQI was between 3 AM to 4 AM (Avg. 41).
2025 Days Vs Air Quality
Monterrey, San Pedro, San Jose, Costa Rica
2025
94%
120
6%
8
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Good
120 DaysModerate
8 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 278 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
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
41AQI
30th May 2025
42AQI
42AQI
31st May 2025
44AQI
44AQI
1st June 2025
40AQI
40AQI
2nd June 2025
43AQI
43AQI
3rd June 2025
41AQI
41AQI
4th June 2025
43AQI
43AQI
5th June 2025
44AQI
44AQI
6th June 2025
37AQI
37AQI
7th June 2025
36AQI
36AQI
8th June 2025
37AQI
37AQI
9th June 2025
36AQI
36AQI
10th June 2025
40AQI
40AQI
11th June 2025
40AQI
40AQI
12th June 2025
42AQI
42AQI
13th June 2025
43AQI
43AQI
14th June 2025
44AQI
44AQI
15th June 2025
43AQI
43AQI
16th June 2025
42AQI
42AQI
17th June 2025
44AQI
44AQI
18th June 2025
43AQI
43AQI
19th June 2025
41AQI
41AQI
20th June 2025
38AQI
38AQI
21st June 2025
36AQI
36AQI
22nd June 2025
33AQI
33AQI
23rd June 2025
34AQI
34AQI
24th June 2025
40AQI
40AQI
25th June 2025
39AQI
39AQI
26th June 2025
37AQI
37AQI
27th June 2025
35AQI
35AQI
28th June 2025
37AQI
37AQI
29th June 2025
37AQI
37AQI
30th June 2025
36AQI
36AQI
1st July 2025
36AQI
36AQI
2nd July 2025
32AQI
32AQI
3rd July 2025
34AQI
34AQI
4th July 2025
35AQI
35AQI
5th July 2025
38AQI
38AQI
6th July 2025
41AQI
41AQI
7th July 2025
41AQI
41AQI
8th July 2025
41AQI
41AQI
9th July 2025
45AQI
45AQI
10th July 2025
35AQI
35AQI
11th July 2025
44AQI
44AQI
12th July 2025
43AQI
43AQI
13th July 2025
47AQI
47AQI
14th July 2025
38AQI
38AQI
15th July 2025
37AQI
37AQI
16th July 2025
37AQI
37AQI
17th July 2025
36AQI
36AQI
18th July 2025
32AQI
32AQI
19th July 2025
35AQI
35AQI
20th July 2025
37AQI
37AQI
21st July 2025
38AQI
38AQI
22nd July 2025
36AQI
36AQI
23rd July 2025
40AQI
40AQI
24th July 2025
37AQI
37AQI
25th July 2025
35AQI
35AQI
26th July 2025
37AQI
37AQI
27th July 2025
34AQI
34AQI
28th July 2025
31AQI
31AQI
29th July 2025
31AQI
31AQI
30th July 2025
35AQI
35AQI
31st July 2025
41AQI
41AQI
1st August 2025
48AQI
48AQI
2nd August 2025
48AQI
48AQI
3rd August 2025
35AQI
35AQI
4th August 2025
30AQI
30AQI
5th August 2025
40AQI
40AQI
6th August 2025
42AQI
42AQI
7th August 2025
31AQI
31AQI
8th August 2025
32AQI
32AQI
9th August 2025
43AQI
43AQI
10th August 2025
38AQI
38AQI
11th August 2025
38AQI
38AQI
12th August 2025
34AQI
34AQI
13th August 2025
42AQI
42AQI
14th August 2025
51AQI
51AQI
15th August 2025
47AQI
47AQI
16th August 2025
49AQI
49AQI
17th August 2025
44AQI
44AQI
18th August 2025
41AQI
41AQI
19th August 2025
46AQI
46AQI
20th August 2025
49AQI
49AQI
21st August 2025
42AQI
42AQI
22nd August 2025
46AQI
46AQI
23rd August 2025
55AQI
55AQI
24th August 2025
43AQI
43AQI
25th August 2025
38AQI
38AQI
26th August 2025
43AQI
43AQI
27th August 2025
42AQI
42AQI
28th August 2025
44AQI
44AQI
29th August 2025
52AQI
52AQI
30th August 2025
52AQI
52AQI
31st August 2025
49AQI
49AQI
1st September 2025
36AQI
36AQI
2nd September 2025
39AQI
39AQI
3rd September 2025
46AQI
46AQI
4th September 2025
36AQI
36AQI
5th September 2025
51AQI
51AQI
6th September 2025
49AQI
49AQI
7th September 2025
37AQI
37AQI
8th September 2025
49AQI
49AQI
9th September 2025
43AQI
43AQI
10th September 2025
40AQI
40AQI
11th September 2025
38AQI
38AQI
12th September 2025
46AQI
46AQI
13th September 2025
44AQI
44AQI
14th September 2025
50AQI
50AQI
15th September 2025
47AQI
47AQI
16th September 2025
51AQI
51AQI
17th September 2025
47AQI
47AQI
18th September 2025
38AQI
38AQI
19th September 2025
41AQI
41AQI
20th September 2025
39AQI
39AQI
21st September 2025
40AQI
40AQI
22nd September 2025
39AQI
39AQI
23rd September 2025
40AQI
40AQI
24th September 2025
41AQI
41AQI
25th September 2025
29AQI
29AQI
26th September 2025
31AQI
31AQI
27th September 2025
28AQI
28AQI
28th September 2025
31AQI
31AQI
29th September 2025
32AQI
32AQI
30th September 2025
41AQI
41AQI
1st October 2025
45AQI
45AQI
2nd October 2025
57AQI
57AQI
3rd October 2025
55AQI
55AQI
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
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
202540AQI
3
30
31
27
4
28
2
1
2
120
8
Highest AQI recorded in
October52AQI
Lowest AQI recorded in
July37AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
40AQILeast Polluted Year Recorded
2025(Avg.)
40AQIMonterrey's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
