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HistoryAQIPM2.5PM10COSO2NO2O3

San Jose US Embassy, Santa Ana, 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

San Jose US Embassy, Santa Ana, San Jose, Costa Rica

2021
2022
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
20th Oct 2021
68AQI
Lowest AQI recorded on
16th Oct 2024
5AQI

Same Day Analysis (27th October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 2nd highest AQI at 47 of Good air quality, showing improvement over 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 27th Oct - 28th Oct 2025

San Jose US Embassy, Santa Ana, San Jose, Costa Rica

AQI
Day
Night
.

5 AM27th Oct 2025

5 PM

4 AM28th Oct 2025

Day time
Avg. Highest Time
6AM27th Oct

53AQI

Avg. Lowest Time
11AM27th Oct

33AQI

Night time
Avg. Highest Time
6PM27th Oct

54AQI

Avg. Lowest Time
4AM28th Oct

29AQI

In the last 24 hours,

San Jose US Embassy's AQI reached its highest point of 54 at 6 PM during the Night, while the lowest point, 29, was recorded at 4 AM during the Night between 27th Oct and 28th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

San Jose US Embassy, Santa Ana, San Jose, Costa Rica

SepOct
28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th
Day
Night
28th Sep 2025435 AMAQI
28th Sep 2025446 AMAQI
28th Sep 2025417 AMAQI
28th Sep 2025358 AMAQI
28th Sep 2025319 AMAQI
28th Sep 20252510 AMAQI
28th Sep 20253611 AMAQI
28th Sep 20254212 PMAQI
28th Sep 2025431 PMAQI
28th Sep 2025492 PMAQI
28th Sep 2025523 PMAQI
28th Sep 2025514 PMAQI
28th Sep 2025505 PMAQI
28th Sep 2025506 PMAQI
28th Sep 2025417 PMAQI
28th Sep 2025398 PMAQI
28th Sep 2025439 PMAQI
28th Sep 20254410 PMAQI
28th Sep 20253511 PMAQI
29th Sep 20252912 AMAQI
29th Sep 2025321 AMAQI
29th Sep 2025242 AMAQI
29th Sep 2025183 AMAQI
29th Sep 2025214 AMAQI

18°C15/24°C

29th Sep 2025225 AMAQI
29th Sep 2025306 AMAQI
29th Sep 2025397 AMAQI
29th Sep 2025418 AMAQI
29th Sep 2025389 AMAQI
29th Sep 20253010 AMAQI
29th Sep 20253211 AMAQI
29th Sep 20253412 PMAQI
29th Sep 2025381 PMAQI
29th Sep 2025362 PMAQI
29th Sep 2025393 PMAQI
29th Sep 2025464 PMAQI
29th Sep 2025395 PMAQI
29th Sep 2025346 PMAQI
29th Sep 2025437 PMAQI
29th Sep 2025548 PMAQI
29th Sep 2025589 PMAQI
29th Sep 20255610 PMAQI
29th Sep 20255811 PMAQI
30th Sep 20255712 AMAQI
30th Sep 2025591 AMAQI
30th Sep 2025562 AMAQI
30th Sep 2025593 AMAQI
30th Sep 2025574 AMAQI

18°C14/25°C

30th Sep 2025565 AMAQI
30th Sep 2025596 AMAQI
30th Sep 2025517 AMAQI
30th Sep 2025348 AMAQI
30th Sep 2025369 AMAQI
30th Sep 20253710 AMAQI
30th Sep 20253111 AMAQI
30th Sep 20253012 PMAQI
30th Sep 2025371 PMAQI
30th Sep 2025422 PMAQI
30th Sep 2025403 PMAQI
30th Sep 2025484 PMAQI
30th Sep 2025535 PMAQI
30th Sep 2025566 PMAQI
30th Sep 2025537 PMAQI
30th Sep 2025528 PMAQI
30th Sep 2025569 PMAQI
30th Sep 20256110 PMAQI
30th Sep 20256211 PMAQI
1st Oct 20256412 AMAQI
1st Oct 2025641 AMAQI
1st Oct 2025642 AMAQI
1st Oct 2025573 AMAQI
1st Oct 2025584 AMAQI

19°C15/25°C

1st Oct 2025575 AMAQI
1st Oct 2025556 AMAQI
1st Oct 2025567 AMAQI
1st Oct 2025488 AMAQI
1st Oct 2025369 AMAQI
1st Oct 20253410 AMAQI
1st Oct 20253411 AMAQI
1st Oct 20253712 PMAQI
1st Oct 2025321 PMAQI
1st Oct 2025322 PMAQI
1st Oct 2025383 PMAQI
1st Oct 2025344 PMAQI
1st Oct 2025395 PMAQI
1st Oct 2025416 PMAQI
1st Oct 2025407 PMAQI
1st Oct 2025668 PMAQI
1st Oct 2025799 PMAQI
1st Oct 20258310 PMAQI
1st Oct 20257211 PMAQI
2nd Oct 20257312 AMAQI
2nd Oct 2025671 AMAQI
2nd Oct 2025612 AMAQI
2nd Oct 2025613 AMAQI
2nd Oct 2025614 AMAQI

18°C14/26°C

2nd Oct 2025615 AMAQI
2nd Oct 2025626 AMAQI
2nd Oct 2025597 AMAQI
2nd Oct 2025518 AMAQI
2nd Oct 2025499 AMAQI
2nd Oct 20254110 AMAQI
2nd Oct 20253911 AMAQI
2nd Oct 20254112 PMAQI
2nd Oct 2025361 PMAQI
2nd Oct 2025342 PMAQI
2nd Oct 2025393 PMAQI
2nd Oct 2025394 PMAQI
2nd Oct 2025545 PMAQI
2nd Oct 2025596 PMAQI
2nd Oct 2025607 PMAQI
2nd Oct 2025628 PMAQI
2nd Oct 2025639 PMAQI
2nd Oct 20256610 PMAQI
2nd Oct 20257011 PMAQI
3rd Oct 20256812 AMAQI
3rd Oct 2025671 AMAQI
3rd Oct 2025662 AMAQI
3rd Oct 2025653 AMAQI
3rd Oct 2025634 AMAQI

18°C14/25°C

3rd Oct 2025545 AMAQI
3rd Oct 2025666 AMAQI
3rd Oct 2025627 AMAQI
3rd Oct 2025538 AMAQI
3rd Oct 2025429 AMAQI
3rd Oct 20253910 AMAQI
3rd Oct 20253911 AMAQI
3rd Oct 20254712 PMAQI
3rd Oct 2025571 PMAQI
3rd Oct 2025532 PMAQI
3rd Oct 2025483 PMAQI
3rd Oct 2025394 PMAQI
3rd Oct 2025445 PMAQI
3rd Oct 2025606 PMAQI
3rd Oct 2025607 PMAQI
3rd Oct 2025528 PMAQI
3rd Oct 2025459 PMAQI
3rd Oct 20255410 PMAQI
3rd Oct 20255611 PMAQI
4th Oct 20255612 AMAQI
4th Oct 2025541 AMAQI
4th Oct 2025552 AMAQI
4th Oct 2025533 AMAQI
4th Oct 2025534 AMAQI

18°C14/25°C

4th Oct 2025555 AMAQI
4th Oct 2025566 AMAQI
4th Oct 2025417 AMAQI
4th Oct 2025458 AMAQI
4th Oct 2025409 AMAQI
4th Oct 20253810 AMAQI
4th Oct 20253911 AMAQI
4th Oct 20254412 PMAQI
4th Oct 2025511 PMAQI
4th Oct 2025512 PMAQI
4th Oct 2025443 PMAQI
4th Oct 2025364 PMAQI
4th Oct 2025405 PMAQI
4th Oct 2025536 PMAQI
4th Oct 2025557 PMAQI
4th Oct 2025558 PMAQI
4th Oct 2025509 PMAQI
4th Oct 20254510 PMAQI
4th Oct 20255211 PMAQI
5th Oct 20255312 AMAQI
5th Oct 2025541 AMAQI
5th Oct 2025552 AMAQI
5th Oct 2025533 AMAQI
5th Oct 2025534 AMAQI

18°C14/24°C

5th Oct 2025535 AMAQI
5th Oct 2025526 AMAQI
5th Oct 2025587 AMAQI
5th Oct 2025558 AMAQI
5th Oct 2025559 AMAQI
5th Oct 20255410 AMAQI
5th Oct 20255511 AMAQI
5th Oct 20255312 PMAQI
5th Oct 2025521 PMAQI
5th Oct 2025542 PMAQI
5th Oct 2025523 PMAQI
5th Oct 2025474 PMAQI
5th Oct 2025505 PMAQI
5th Oct 2025546 PMAQI
5th Oct 2025567 PMAQI
5th Oct 2025628 PMAQI
5th Oct 2025649 PMAQI
5th Oct 20256410 PMAQI
5th Oct 20256411 PMAQI
6th Oct 20255812 AMAQI
6th Oct 2025601 AMAQI
6th Oct 2025582 AMAQI
6th Oct 2025543 AMAQI
6th Oct 2025554 AMAQI

17°C15/20°C

6th Oct 2025555 AMAQI
6th Oct 2025576 AMAQI
6th Oct 2025507 AMAQI
6th Oct 2025428 AMAQI
6th Oct 2025689 AMAQI
6th Oct 20254710 AMAQI
6th Oct 20253911 AMAQI

18°C14/25°C

7th Oct 2025345 AMAQI
7th Oct 2025496 AMAQI
7th Oct 2025647 AMAQI
7th Oct 2025568 AMAQI
7th Oct 2025549 AMAQI
7th Oct 20255210 AMAQI
7th Oct 20255211 AMAQI
7th Oct 20255412 PMAQI
7th Oct 2025551 PMAQI
7th Oct 2025532 PMAQI
7th Oct 2025533 PMAQI
7th Oct 2025564 PMAQI
7th Oct 2025575 PMAQI
7th Oct 2025566 PMAQI
7th Oct 2025547 PMAQI
7th Oct 2025658 PMAQI
7th Oct 2025709 PMAQI
7th Oct 20257410 PMAQI
7th Oct 20256911 PMAQI
8th Oct 20256612 AMAQI
8th Oct 2025691 AMAQI
8th Oct 2025652 AMAQI
8th Oct 2025603 AMAQI
8th Oct 2025584 AMAQI

19°C15/25°C

8th Oct 2025555 AMAQI
8th Oct 2025596 AMAQI
8th Oct 2025557 AMAQI
8th Oct 2025398 AMAQI
8th Oct 2025479 AMAQI
8th Oct 20254810 AMAQI
8th Oct 20254211 AMAQI
8th Oct 20254012 PMAQI
8th Oct 2025431 PMAQI
8th Oct 2025432 PMAQI
8th Oct 2025443 PMAQI
8th Oct 2025504 PMAQI
8th Oct 2025525 PMAQI
8th Oct 2025636 PMAQI
8th Oct 2025687 PMAQI
8th Oct 2025688 PMAQI
8th Oct 2025709 PMAQI
8th Oct 20257210 PMAQI
8th Oct 20257611 PMAQI
9th Oct 20257412 AMAQI
9th Oct 2025791 AMAQI
9th Oct 2025732 AMAQI
9th Oct 2025743 AMAQI
9th Oct 2025714 AMAQI

18°C13/26°C

9th Oct 2025695 AMAQI
9th Oct 2025606 AMAQI
9th Oct 2025647 AMAQI
9th Oct 2025608 AMAQI
9th Oct 2025599 AMAQI
9th Oct 20255410 AMAQI
9th Oct 20255611 AMAQI
9th Oct 20255712 PMAQI
9th Oct 2025591 PMAQI
9th Oct 2025602 PMAQI
9th Oct 2025573 PMAQI
9th Oct 2025564 PMAQI
9th Oct 2025595 PMAQI
9th Oct 2025646 PMAQI
9th Oct 2025597 PMAQI
9th Oct 2025538 PMAQI
9th Oct 2025549 PMAQI
9th Oct 20255710 PMAQI
9th Oct 20256111 PMAQI
10th Oct 20256112 AMAQI
10th Oct 2025601 AMAQI
10th Oct 2025572 AMAQI
10th Oct 2025563 AMAQI
10th Oct 2025564 AMAQI

18°C14/23°C

10th Oct 2025545 AMAQI
10th Oct 2025536 AMAQI
10th Oct 2025567 AMAQI
10th Oct 2025568 AMAQI
10th Oct 2025549 AMAQI
10th Oct 20255010 AMAQI
10th Oct 20254411 AMAQI
10th Oct 20254412 PMAQI
10th Oct 2025481 PMAQI
10th Oct 2025522 PMAQI
10th Oct 2025543 PMAQI
10th Oct 2025424 PMAQI
10th Oct 2025365 PMAQI
10th Oct 2025556 PMAQI
10th Oct 2025417 PMAQI
10th Oct 2025468 PMAQI
10th Oct 2025399 PMAQI
10th Oct 20252710 PMAQI
10th Oct 20253411 PMAQI
11th Oct 20253512 AMAQI
11th Oct 2025281 AMAQI
11th Oct 2025382 AMAQI
11th Oct 2025333 AMAQI
11th Oct 2025234 AMAQI

18°C14/23°C

11th Oct 2025475 AMAQI
11th Oct 2025496 AMAQI
11th Oct 2025217 AMAQI
11th Oct 2025368 AMAQI
11th Oct 2025559 AMAQI
11th Oct 20255410 AMAQI
11th Oct 20252211 AMAQI
11th Oct 20253612 PMAQI
11th Oct 2025251 PMAQI
11th Oct 2025202 PMAQI
11th Oct 2025493 PMAQI
11th Oct 2025424 PMAQI
11th Oct 2025515 PMAQI
11th Oct 2025516 PMAQI
11th Oct 2025437 PMAQI
11th Oct 2025458 PMAQI
11th Oct 2025459 PMAQI
11th Oct 20253910 PMAQI
11th Oct 20254211 PMAQI
12th Oct 20254312 AMAQI
12th Oct 2025421 AMAQI
12th Oct 2025342 AMAQI
12th Oct 2025373 AMAQI
12th Oct 2025354 AMAQI

17°C14/20°C

12th Oct 2025345 AMAQI
12th Oct 2025396 AMAQI
12th Oct 2025407 AMAQI
12th Oct 2025398 AMAQI
12th Oct 2025429 AMAQI
12th Oct 20254210 AMAQI
12th Oct 20253911 AMAQI
12th Oct 20253712 PMAQI
12th Oct 2025351 PMAQI
12th Oct 2025402 PMAQI
12th Oct 2025333 PMAQI
12th Oct 2025384 PMAQI
12th Oct 2025445 PMAQI
12th Oct 2025426 PMAQI
12th Oct 2025417 PMAQI
12th Oct 2025538 PMAQI
12th Oct 2025589 PMAQI
12th Oct 20255910 PMAQI
12th Oct 20255711 PMAQI
13th Oct 20255812 AMAQI
13th Oct 2025541 AMAQI
13th Oct 2025562 AMAQI
13th Oct 2025543 AMAQI
13th Oct 2025504 AMAQI

17°C14/22°C

13th Oct 2025505 AMAQI
13th Oct 2025526 AMAQI
13th Oct 2025537 AMAQI
13th Oct 2025458 AMAQI
13th Oct 2025449 AMAQI
13th Oct 20254210 AMAQI
13th Oct 20253911 AMAQI
13th Oct 20253812 PMAQI
13th Oct 2025421 PMAQI
13th Oct 2025412 PMAQI
13th Oct 2025453 PMAQI
13th Oct 2025564 PMAQI
13th Oct 2025615 PMAQI
13th Oct 2025616 PMAQI
13th Oct 2025607 PMAQI
13th Oct 2025518 PMAQI
13th Oct 2025539 PMAQI
13th Oct 20255710 PMAQI
13th Oct 20255911 PMAQI
14th Oct 20256112 AMAQI
14th Oct 2025581 AMAQI
14th Oct 2025592 AMAQI
14th Oct 2025553 AMAQI
14th Oct 2025544 AMAQI

18°C14/24°C

14th Oct 2025545 AMAQI
14th Oct 2025596 AMAQI
14th Oct 2025647 AMAQI
14th Oct 2025578 AMAQI
14th Oct 2025469 AMAQI
14th Oct 20254210 AMAQI
14th Oct 20254611 AMAQI
14th Oct 20255212 PMAQI
14th Oct 2025551 PMAQI
14th Oct 2025562 PMAQI
14th Oct 2025583 PMAQI
14th Oct 2025614 PMAQI
14th Oct 2025635 PMAQI
14th Oct 2025696 PMAQI
14th Oct 2025647 PMAQI
14th Oct 2025648 PMAQI
14th Oct 2025589 PMAQI
14th Oct 20255810 PMAQI
14th Oct 20256111 PMAQI
15th Oct 20256412 AMAQI
15th Oct 2025611 AMAQI
15th Oct 2025642 AMAQI
15th Oct 2025613 AMAQI
15th Oct 2025604 AMAQI

18°C15/24°C

15th Oct 2025585 AMAQI
15th Oct 2025596 AMAQI
15th Oct 2025637 AMAQI
15th Oct 2025578 AMAQI
15th Oct 2025539 AMAQI
15th Oct 20255010 AMAQI
15th Oct 20254911 AMAQI
15th Oct 20255412 PMAQI
15th Oct 2025521 PMAQI
15th Oct 2025512 PMAQI
15th Oct 2025533 PMAQI
15th Oct 2025554 PMAQI
15th Oct 2025415 PMAQI
15th Oct 2025476 PMAQI
15th Oct 2025527 PMAQI
15th Oct 2025578 PMAQI
15th Oct 2025599 PMAQI
15th Oct 20256410 PMAQI
15th Oct 20256911 PMAQI
16th Oct 20257612 AMAQI
16th Oct 2025731 AMAQI
16th Oct 2025722 AMAQI
16th Oct 2025683 AMAQI
16th Oct 2025684 AMAQI

18°C14/25°C

16th Oct 2025675 AMAQI
16th Oct 2025706 AMAQI
16th Oct 2025677 AMAQI
16th Oct 2025578 AMAQI
16th Oct 2025519 AMAQI
16th Oct 20255210 AMAQI
16th Oct 20254711 AMAQI
16th Oct 20254812 PMAQI
16th Oct 2025521 PMAQI
16th Oct 2025552 PMAQI
16th Oct 2025523 PMAQI
16th Oct 2025494 PMAQI
16th Oct 2025465 PMAQI
16th Oct 2025476 PMAQI
16th Oct 2025497 PMAQI
16th Oct 2025488 PMAQI
16th Oct 2025529 PMAQI
16th Oct 20255610 PMAQI
16th Oct 20255811 PMAQI
17th Oct 20255612 AMAQI
17th Oct 2025541 AMAQI
17th Oct 2025522 AMAQI
17th Oct 2025463 AMAQI
17th Oct 2025414 AMAQI

17°C14/23°C

17th Oct 2025385 AMAQI
17th Oct 2025526 AMAQI
17th Oct 2025557 AMAQI
17th Oct 2025518 AMAQI
17th Oct 2025519 AMAQI
17th Oct 20253610 AMAQI
17th Oct 20253511 AMAQI
17th Oct 20254412 PMAQI
17th Oct 2025431 PMAQI
17th Oct 2025512 PMAQI
17th Oct 2025513 PMAQI
17th Oct 2025554 PMAQI
17th Oct 2025455 PMAQI
17th Oct 2025416 PMAQI
17th Oct 2025497 PMAQI
17th Oct 2025538 PMAQI
17th Oct 2025429 PMAQI
17th Oct 20254310 PMAQI
17th Oct 20254311 PMAQI
18th Oct 20254112 AMAQI
18th Oct 2025451 AMAQI
18th Oct 2025462 AMAQI
18th Oct 2025473 AMAQI
18th Oct 2025434 AMAQI

17°C14/22°C

18th Oct 2025385 AMAQI
18th Oct 2025486 AMAQI
18th Oct 2025547 AMAQI
18th Oct 2025488 AMAQI
18th Oct 2025439 AMAQI
18th Oct 20254210 AMAQI
18th Oct 20253911 AMAQI
18th Oct 20253812 PMAQI
18th Oct 2025451 PMAQI
18th Oct 2025462 PMAQI
18th Oct 2025483 PMAQI
18th Oct 2025534 PMAQI
18th Oct 2025595 PMAQI
18th Oct 2025616 PMAQI
18th Oct 2025637 PMAQI
18th Oct 2025588 PMAQI
18th Oct 2025569 PMAQI
18th Oct 20255510 PMAQI
18th Oct 20255811 PMAQI
19th Oct 20255612 AMAQI
19th Oct 2025581 AMAQI
19th Oct 2025582 AMAQI
19th Oct 2025573 AMAQI
19th Oct 2025564 AMAQI

18°C14/23°C

19th Oct 2025575 AMAQI
19th Oct 2025566 AMAQI
19th Oct 2025587 AMAQI
19th Oct 2025548 AMAQI
19th Oct 2025519 AMAQI
19th Oct 20253910 AMAQI
19th Oct 20253711 AMAQI
19th Oct 20253312 PMAQI
19th Oct 2025231 PMAQI
19th Oct 2025212 PMAQI
19th Oct 2025463 PMAQI
19th Oct 2025484 PMAQI
19th Oct 2025475 PMAQI
19th Oct 2025246 PMAQI
19th Oct 2025327 PMAQI
19th Oct 2025358 PMAQI
19th Oct 2025519 PMAQI
19th Oct 20256010 PMAQI
19th Oct 20255411 PMAQI
20th Oct 20254812 AMAQI
20th Oct 2025441 AMAQI
20th Oct 2025442 AMAQI
20th Oct 2025463 AMAQI
20th Oct 2025384 AMAQI

18°C14/25°C

20th Oct 2025195 AMAQI
20th Oct 2025146 AMAQI
20th Oct 2025397 AMAQI
20th Oct 2025368 AMAQI
20th Oct 2025409 AMAQI
20th Oct 20254410 AMAQI
20th Oct 20254111 AMAQI
20th Oct 20253712 PMAQI
20th Oct 2025341 PMAQI
20th Oct 2025322 PMAQI
20th Oct 2025343 PMAQI
20th Oct 2025334 PMAQI
20th Oct 2025395 PMAQI
20th Oct 2025366 PMAQI
20th Oct 2025417 PMAQI
20th Oct 2025348 PMAQI
20th Oct 2025459 PMAQI
20th Oct 20255110 PMAQI
20th Oct 20255311 PMAQI
21st Oct 20255312 AMAQI
21st Oct 2025541 AMAQI
21st Oct 2025492 AMAQI
21st Oct 2025383 AMAQI
21st Oct 2025434 AMAQI

17°C14/23°C

21st Oct 2025505 AMAQI
21st Oct 2025466 AMAQI
21st Oct 2025367 AMAQI
21st Oct 2025388 AMAQI
21st Oct 2025449 AMAQI
21st Oct 20253610 AMAQI
21st Oct 20253011 AMAQI
21st Oct 20252712 PMAQI
21st Oct 2025301 PMAQI
21st Oct 2025352 PMAQI
21st Oct 2025383 PMAQI
21st Oct 2025464 PMAQI
21st Oct 2025485 PMAQI
21st Oct 2025486 PMAQI
21st Oct 2025377 PMAQI
21st Oct 2025298 PMAQI
21st Oct 2025409 PMAQI
21st Oct 20255410 PMAQI
21st Oct 20255411 PMAQI
22nd Oct 20255412 AMAQI
22nd Oct 2025551 AMAQI
22nd Oct 2025542 AMAQI
22nd Oct 2025543 AMAQI
22nd Oct 2025524 AMAQI

17°C15/23°C

22nd Oct 2025495 AMAQI
22nd Oct 2025506 AMAQI
22nd Oct 2025437 AMAQI
22nd Oct 2025358 AMAQI
22nd Oct 2025349 AMAQI
22nd Oct 20252810 AMAQI
22nd Oct 20252811 AMAQI
22nd Oct 20252612 PMAQI
22nd Oct 2025221 PMAQI
22nd Oct 2025252 PMAQI
22nd Oct 2025323 PMAQI
22nd Oct 2025344 PMAQI
22nd Oct 2025435 PMAQI
22nd Oct 2025506 PMAQI
22nd Oct 2025467 PMAQI
22nd Oct 2025418 PMAQI
22nd Oct 2025439 PMAQI
22nd Oct 20255010 PMAQI
22nd Oct 20255611 PMAQI
23rd Oct 20255412 AMAQI
23rd Oct 2025511 AMAQI
23rd Oct 2025522 AMAQI
23rd Oct 2025503 AMAQI
23rd Oct 2025504 AMAQI

18°C15/24°C

23rd Oct 2025465 AMAQI
23rd Oct 2025496 AMAQI
23rd Oct 2025557 AMAQI
23rd Oct 2025488 AMAQI
23rd Oct 2025409 AMAQI
23rd Oct 20253810 AMAQI
23rd Oct 20253411 AMAQI
23rd Oct 20253512 PMAQI
23rd Oct 2025411 PMAQI
23rd Oct 2025452 PMAQI
23rd Oct 2025453 PMAQI
23rd Oct 2025504 PMAQI
23rd Oct 2025545 PMAQI
23rd Oct 2025576 PMAQI
23rd Oct 2025577 PMAQI
23rd Oct 2025488 PMAQI
23rd Oct 2025429 PMAQI
23rd Oct 20254810 PMAQI
23rd Oct 20255411 PMAQI
24th Oct 20255512 AMAQI
24th Oct 2025561 AMAQI
24th Oct 2025562 AMAQI
24th Oct 2025563 AMAQI
24th Oct 2025554 AMAQI

18°C14/25°C

24th Oct 2025565 AMAQI
24th Oct 2025576 AMAQI
24th Oct 2025587 AMAQI
24th Oct 2025568 AMAQI
24th Oct 2025529 AMAQI
24th Oct 20254810 AMAQI
24th Oct 20254211 AMAQI
24th Oct 20254012 PMAQI
24th Oct 2025421 PMAQI
24th Oct 2025402 PMAQI
24th Oct 2025463 PMAQI
24th Oct 2025524 PMAQI
24th Oct 2025565 PMAQI
24th Oct 2025606 PMAQI
24th Oct 2025617 PMAQI
24th Oct 2025588 PMAQI
24th Oct 2025559 PMAQI
24th Oct 20255610 PMAQI
24th Oct 20255511 PMAQI
25th Oct 20255212 AMAQI
25th Oct 2025501 AMAQI
25th Oct 2025502 AMAQI
25th Oct 2025513 AMAQI
25th Oct 2025464 AMAQI

18°C15/23°C

25th Oct 2025385 AMAQI
25th Oct 2025386 AMAQI
25th Oct 2025367 AMAQI
25th Oct 2025268 AMAQI
25th Oct 2025229 AMAQI
25th Oct 20252310 AMAQI
25th Oct 20252311 AMAQI
25th Oct 20252612 PMAQI
25th Oct 2025301 PMAQI
25th Oct 2025302 PMAQI
25th Oct 2025283 PMAQI
25th Oct 2025324 PMAQI
25th Oct 2025355 PMAQI
25th Oct 2025486 PMAQI
25th Oct 2025537 PMAQI
25th Oct 2025478 PMAQI
25th Oct 2025439 PMAQI
25th Oct 20254710 PMAQI
25th Oct 20255111 PMAQI
26th Oct 20255312 AMAQI
26th Oct 2025541 AMAQI
26th Oct 2025542 AMAQI
26th Oct 2025543 AMAQI
26th Oct 2025534 AMAQI

18°C15/24°C

26th Oct 2025545 AMAQI
26th Oct 2025556 AMAQI
26th Oct 2025557 AMAQI
26th Oct 2025558 AMAQI
26th Oct 2025529 AMAQI
26th Oct 20254410 AMAQI
26th Oct 20254211 AMAQI
26th Oct 20253712 PMAQI
26th Oct 2025321 PMAQI
26th Oct 2025282 PMAQI
26th Oct 2025273 PMAQI
26th Oct 2025304 PMAQI
26th Oct 2025415 PMAQI
26th Oct 2025486 PMAQI
26th Oct 2025497 PMAQI
26th Oct 2025488 PMAQI
26th Oct 2025549 PMAQI
26th Oct 20255610 PMAQI
26th Oct 20255811 PMAQI
27th Oct 20255812 AMAQI
27th Oct 2025581 AMAQI
27th Oct 2025572 AMAQI
27th Oct 2025553 AMAQI
27th Oct 2025514 AMAQI

18°C14/24°C

27th Oct 2025525 AMAQI
27th Oct 2025536 AMAQI
27th Oct 2025537 AMAQI
27th Oct 2025478 AMAQI
27th Oct 2025399 AMAQI
27th Oct 20253310 AMAQI
27th Oct 20253311 AMAQI
27th Oct 20253812 PMAQI
27th Oct 2025401 PMAQI
27th Oct 2025392 PMAQI
27th Oct 2025373 PMAQI
27th Oct 2025394 PMAQI
27th Oct 2025505 PMAQI
27th Oct 2025546 PMAQI
27th Oct 2025497 PMAQI
27th Oct 2025428 PMAQI
27th Oct 2025379 PMAQI
27th Oct 20253210 PMAQI
27th Oct 20253111 PMAQI
28th Oct 20253912 AMAQI
28th Oct 2025361 AMAQI
28th Oct 2025302 AMAQI
28th Oct 2025323 AMAQI
28th Oct 2025294 AMAQI

18°C15/24°C

28th Oct 2025285 AMAQI
5 AM
28th Oct 2025256 AMAQI
11 AM
5 PM
11 PM
4 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

52AQI

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

41AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 52), while the lowest AQI was between 11 AM to 2 PM (Avg. 41).
Night time
Avg. Highest Time
10 PM - 11 PM

56AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
3 AM - 8 PM

51AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 PM to 11 PM (Avg. 56), while the lowest AQI was between 3 AM to 8 PM (Avg. 51).

2025 Days Vs Air Quality

San Jose US Embassy, Santa Ana, San Jose, Costa Rica

2025

68%

205

32%

95

Total number of days with different AQI categories in last 301 days in 2025 (64 days remaining)

Good
205 Days
Moderate
95 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 68%

Health Risk Level:

Moderate

In 2025, 68% of 301 days were within WHO’s safe air quality limits, and 32% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights

San Jose US Embassy, Santa Ana, 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
43AQI
2nd January 2025
42AQI
3rd January 2025
58AQI
4th January 2025
52AQI
5th January 2025
50AQI
6th January 2025
52AQI
7th January 2025
59AQI
8th January 2025
57AQI
9th January 2025
54AQI
10th January 2025
53AQI
11th January 2025
51AQI
12th January 2025
52AQI
13th January 2025
50AQI
14th January 2025
53AQI
15th January 2025
53AQI
16th January 2025
46AQI
17th January 2025
45AQI
18th January 2025
49AQI
19th January 2025
48AQI
20th January 2025
49AQI
21st January 2025
51AQI
22nd January 2025
49AQI
23rd January 2025
50AQI
24th January 2025
56AQI
25th January 2025
58AQI
26th January 2025
57AQI
27th January 2025
54AQI
28th January 2025
54AQI
29th January 2025
54AQI
30th January 2025
52AQI
31st January 2025
52AQI
1st February 2025
53AQI
2nd February 2025
55AQI
3rd February 2025
57AQI
4th February 2025
55AQI
5th February 2025
55AQI
6th February 2025
62AQI
7th February 2025
59AQI
8th February 2025
60AQI
9th February 2025
57AQI
10th February 2025
54AQI
11th February 2025
55AQI
12th February 2025
58AQI
13th February 2025
50AQI
14th February 2025
45AQI
15th February 2025
44AQI
16th February 2025
39AQI
17th February 2025
33AQI
18th February 2025
33AQI
19th February 2025
39AQI
20th February 2025
37AQI
21st February 2025
32AQI
22nd February 2025
34AQI
23rd February 2025
33AQI
24th February 2025
33AQI
25th February 2025
36AQI
26th February 2025
38AQI
27th February 2025
44AQI
28th February 2025
41AQI
1st March 2025
43AQI
2nd March 2025
37AQI
3rd March 2025
40AQI
4th March 2025
39AQI
5th March 2025
41AQI
6th March 2025
40AQI
7th March 2025
37AQI
8th March 2025
38AQI
9th March 2025
37AQI
10th March 2025
37AQI
11th March 2025
37AQI
12th March 2025
45AQI
13th March 2025
55AQI
14th March 2025
54AQI
15th March 2025
46AQI
16th March 2025
45AQI
17th March 2025
56AQI
18th March 2025
59AQI
19th March 2025
56AQI
20th March 2025
53AQI
21st March 2025
54AQI
22nd March 2025
54AQI
23rd March 2025
52AQI
24th March 2025
54AQI
25th March 2025
62AQI
26th March 2025
61AQI
27th March 2025
62AQI
28th March 2025
64AQI
29th March 2025
64AQI
30th March 2025
61AQI
31st March 2025
62AQI
1st April 2025
61AQI
2nd April 2025
62AQI
3rd April 2025
59AQI
4th April 2025
57AQI
5th April 2025
56AQI
6th April 2025
52AQI
7th April 2025
52AQI
8th April 2025
48AQI
9th April 2025
49AQI
10th April 2025
51AQI
11th April 2025
51AQI
12th April 2025
54AQI
13th April 2025
57AQI
14th April 2025
57AQI
15th April 2025
58AQI
16th April 2025
60AQI
17th April 2025
57AQI
18th April 2025
58AQI
19th April 2025
52AQI
20th April 2025
52AQI
21st April 2025
54AQI
22nd April 2025
56AQI
23rd April 2025
55AQI
24th April 2025
51AQI
25th April 2025
51AQI
26th April 2025
52AQI
27th April 2025
51AQI
28th April 2025
52AQI
29th April 2025
55AQI
30th April 2025
53AQI
1st May 2025
44AQI
2nd May 2025
46AQI
3rd May 2025
47AQI
4th May 2025
48AQI
5th May 2025
45AQI
6th May 2025
47AQI
7th May 2025
44AQI
8th May 2025
48AQI
9th May 2025
48AQI
10th May 2025
44AQI
11th May 2025
34AQI
12th May 2025
35AQI
13th May 2025
36AQI
14th May 2025
44AQI
15th May 2025
44AQI
16th May 2025
42AQI
17th May 2025
45AQI
18th May 2025
47AQI
19th May 2025
45AQI
20th May 2025
41AQI
21st May 2025
44AQI
22nd May 2025
42AQI
23rd May 2025
39AQI
24th May 2025
41AQI
25th May 2025
40AQI
26th May 2025
41AQI
27th May 2025
42AQI
28th May 2025
38AQI
29th May 2025
40AQI
30th May 2025
43AQI
31st May 2025
41AQI
1st June 2025
39AQI
2nd June 2025
42AQI
3rd June 2025
43AQI
4th June 2025
40AQI
5th June 2025
40AQI
6th June 2025
37AQI
7th June 2025
37AQI
8th June 2025
36AQI
9th June 2025
34AQI
10th June 2025
36AQI
11th June 2025
38AQI
12th June 2025
42AQI
13th June 2025
37AQI
14th June 2025
37AQI
15th June 2025
34AQI
16th June 2025
35AQI
17th June 2025
34AQI
18th June 2025
33AQI
19th June 2025
31AQI
20th June 2025
33AQI
21st June 2025
31AQI
22nd June 2025
31AQI
23rd June 2025
32AQI
24th June 2025
40AQI
25th June 2025
38AQI
26th June 2025
32AQI
27th June 2025
35AQI
28th June 2025
34AQI
29th June 2025
34AQI
30th June 2025
32AQI
1st July 2025
30AQI
2nd July 2025
30AQI
3rd July 2025
34AQI
4th July 2025
34AQI
5th July 2025
40AQI
6th July 2025
42AQI
7th July 2025
37AQI
8th July 2025
39AQI
9th July 2025
47AQI
10th July 2025
33AQI
11th July 2025
37AQI
12th July 2025
37AQI
13th July 2025
43AQI
14th July 2025
35AQI
15th July 2025
35AQI
16th July 2025
33AQI
17th July 2025
35AQI
18th July 2025
35AQI
19th July 2025
37AQI
20th July 2025
37AQI
21st July 2025
39AQI
22nd July 2025
38AQI
23rd July 2025
43AQI
24th July 2025
40AQI
25th July 2025
36AQI
26th July 2025
35AQI
27th July 2025
33AQI
28th July 2025
31AQI
29th July 2025
33AQI
30th July 2025
36AQI
31st July 2025
42AQI
1st August 2025
47AQI
2nd August 2025
48AQI
3rd August 2025
35AQI
4th August 2025
31AQI
5th August 2025
39AQI
6th August 2025
40AQI
7th August 2025
32AQI
8th August 2025
34AQI
9th August 2025
49AQI
10th August 2025
41AQI
11th August 2025
38AQI
12th August 2025
33AQI
13th August 2025
40AQI
14th August 2025
51AQI
15th August 2025
47AQI
16th August 2025
49AQI
17th August 2025
43AQI
18th August 2025
40AQI
19th August 2025
45AQI
20th August 2025
49AQI
21st August 2025
40AQI
22nd August 2025
45AQI
23rd August 2025
50AQI
24th August 2025
42AQI
25th August 2025
35AQI
26th August 2025
42AQI
27th August 2025
41AQI
28th August 2025
43AQI
29th August 2025
52AQI
30th August 2025
50AQI
31st August 2025
49AQI
1st September 2025
37AQI
2nd September 2025
37AQI
3rd September 2025
45AQI
4th September 2025
37AQI
5th September 2025
50AQI
6th September 2025
47AQI
7th September 2025
35AQI
8th September 2025
47AQI
9th September 2025
41AQI
10th September 2025
39AQI
11th September 2025
38AQI
12th September 2025
45AQI
13th September 2025
45AQI
14th September 2025
51AQI
15th September 2025
47AQI
16th September 2025
51AQI
17th September 2025
47AQI
18th September 2025
38AQI
19th September 2025
40AQI
20th September 2025
38AQI
21st September 2025
42AQI
22nd September 2025
38AQI
23rd September 2025
41AQI
24th September 2025
41AQI
25th September 2025
31AQI
26th September 2025
31AQI
27th September 2025
31AQI
28th September 2025
40AQI
29th September 2025
36AQI
30th September 2025
51AQI
1st October 2025
53AQI
2nd October 2025
57AQI
3rd October 2025
56AQI
4th October 2025
49AQI
5th October 2025
54AQI
6th October 2025
57AQI
7th October 2025
58AQI
8th October 2025
58AQI
9th October 2025
64AQI
10th October 2025
49AQI
11th October 2025
39AQI
12th October 2025
42AQI
13th October 2025
52AQI
14th October 2025
58AQI
15th October 2025
57AQI
16th October 2025
58AQI
17th October 2025
47AQI
18th October 2025
49AQI
19th October 2025
47AQI
20th October 2025
40AQI
21st October 2025
43AQI
22nd October 2025
44AQI
23rd October 2025
48AQI
24th October 2025
54AQI
25th October 2025
41AQI
26th October 2025
49AQI
27th October 2025
47AQI
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

52AQI

46AQI

50AQI

54AQI

43AQI

36AQI

37AQI

43AQI

41AQI

51AQI

No. of days

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

202545AQI

11
20
16
12
14
17
2
28
31
30
31
29
2
27
3
14
13
205
95

Highest AQI recorded in

April

54AQI

Lowest AQI recorded in

June

36AQI

202443AQI

14
2
1
1
2
10
15
15
24
7
25
6
28
30
1
24
6
7
24
169
73

Highest AQI recorded in

April

76AQI

Lowest AQI recorded in

October

27AQI

202330AQI

24
25
27
3
20
9
30
1
29
1
3
1
5
5
3
29
2
196
21

Highest AQI recorded in

September

51AQI

Lowest AQI recorded in

July

7AQI

202229AQI

31
22
30
1
20
1
8
1
30
22
1
26
3
29
2
27
3
31
276
12

Highest AQI recorded in

August

51AQI

Lowest AQI recorded in

January

18AQI

202132AQI

30
24
3
28
1
28
31
29
1
29
2
20
2
26
2
22
4
13
24
304
15

Highest AQI recorded in

October

39AQI

Lowest AQI recorded in

December

21AQI

202036AQI

11
17
3
14
3
24
4
1
23
5
28
3
28
2
28
2
28
2
31
232
24
1

Highest AQI recorded in

June

43AQI

Lowest AQI recorded in

December

24AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
45AQI
Least Polluted Year Recorded
2022(Avg.)
29AQI

San Jose US Embassy's annual 2025 AQI (45) shows an average percentage change of 34.4% (worsened AQI) compared to previous years: 2020 (36), 2021 (32), 2022 (29), 2023 (30), 2024 (43).