Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Donostia, Basque Country, Spain 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+

September Air Quality Analysis

Donostia, Basque Country, Spain

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
5th Sep 2023
88AQI
Lowest AQI recorded on
22nd Sep 2025
18AQI

Same Day Analysis (28th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 50 of Good air quality on the same day.

Day & Night AQI Trend: 27th Sep - 28th Sep 2026

Donostia, Basque Country, Spain

AQI
Day
Night
.

7 AM27th Sep 2026

8 PM

6 AM28th Sep 2026

Day time
Avg. Highest Time
4PM27th Sep

51AQI

Avg. Lowest Time
10AM27th Sep

28AQI

Night time
Avg. Highest Time
4AM28th Sep

54AQI

Avg. Lowest Time
7AM27th Sep

31AQI

In the last 24 hours,

Donostia's AQI reached its highest point of 54 at 4 AM during the Night, while the lowest point, 28, was recorded at 10 AM during the Day between 27th Sep and 28th Sep 2026.

Day & Night AQI Trend : Aug - Sep 2026

Donostia, Basque Country, Spain

AugSep
30th - 31st31st - 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
30th Aug 2026287 AMAQI
30th Aug 2026258 AMAQI
30th Aug 2026279 AMAQI
30th Aug 20262410 AMAQI
30th Aug 20262111 AMAQI
30th Aug 20262412 PMAQI
30th Aug 2026301 PMAQI
30th Aug 2026242 PMAQI
30th Aug 2026223 PMAQI
30th Aug 2026224 PMAQI
30th Aug 2026225 PMAQI
30th Aug 2026296 PMAQI
30th Aug 2026337 PMAQI
30th Aug 2026338 PMAQI
30th Aug 2026329 PMAQI
30th Aug 20262810 PMAQI
30th Aug 20262611 PMAQI
31st Aug 20262612 AMAQI
31st Aug 2026241 AMAQI
31st Aug 2026242 AMAQI
31st Aug 2026243 AMAQI
31st Aug 2026244 AMAQI
31st Aug 2026245 AMAQI
31st Aug 2026236 AMAQI

19°C16/25°C

31st Aug 2026257 AMAQI
31st Aug 2026278 AMAQI
31st Aug 2026269 AMAQI
31st Aug 20262810 AMAQI
31st Aug 20263111 AMAQI
31st Aug 20263412 PMAQI
31st Aug 2026341 PMAQI
31st Aug 2026322 PMAQI
31st Aug 2026313 PMAQI
31st Aug 2026364 PMAQI
31st Aug 2026425 PMAQI
31st Aug 2026486 PMAQI
31st Aug 2026497 PMAQI
31st Aug 2026498 PMAQI
31st Aug 2026489 PMAQI
31st Aug 20263610 PMAQI
31st Aug 20263011 PMAQI
1st Sep 20263612 AMAQI
1st Sep 2026341 AMAQI
1st Sep 2026372 AMAQI
1st Sep 2026413 AMAQI
1st Sep 2026414 AMAQI
1st Sep 2026405 AMAQI
1st Sep 2026426 AMAQI

18°C16/23°C

1st Sep 2026487 AMAQI
1st Sep 2026428 AMAQI
1st Sep 2026309 AMAQI
1st Sep 20262810 AMAQI
1st Sep 20263111 AMAQI
1st Sep 20263712 PMAQI
1st Sep 2026401 PMAQI
1st Sep 2026412 PMAQI
1st Sep 2026403 PMAQI
1st Sep 2026394 PMAQI
1st Sep 2026395 PMAQI
1st Sep 2026426 PMAQI
1st Sep 2026407 PMAQI
1st Sep 2026338 PMAQI
1st Sep 2026389 PMAQI
1st Sep 20264710 PMAQI
1st Sep 20264511 PMAQI
2nd Sep 20264412 AMAQI
2nd Sep 2026431 AMAQI
2nd Sep 2026382 AMAQI
2nd Sep 2026323 AMAQI
2nd Sep 2026334 AMAQI
2nd Sep 2026395 AMAQI
2nd Sep 2026466 AMAQI

18°C14/22°C

2nd Sep 2026467 AMAQI
2nd Sep 2026438 AMAQI
2nd Sep 2026409 AMAQI
2nd Sep 20263310 AMAQI
2nd Sep 20263211 AMAQI
2nd Sep 20263512 PMAQI
2nd Sep 2026401 PMAQI
2nd Sep 2026442 PMAQI
2nd Sep 2026453 PMAQI
2nd Sep 2026454 PMAQI
2nd Sep 2026435 PMAQI
2nd Sep 2026426 PMAQI
2nd Sep 2026417 PMAQI
2nd Sep 2026398 PMAQI
2nd Sep 2026429 PMAQI
2nd Sep 20264210 PMAQI
2nd Sep 20264311 PMAQI
3rd Sep 20263812 AMAQI
3rd Sep 2026321 AMAQI
3rd Sep 2026322 AMAQI
3rd Sep 2026313 AMAQI
3rd Sep 2026304 AMAQI
3rd Sep 2026305 AMAQI
3rd Sep 2026356 AMAQI

19°C16/24°C

3rd Sep 2026377 AMAQI
3rd Sep 2026318 AMAQI
3rd Sep 2026299 AMAQI
3rd Sep 20263110 AMAQI
3rd Sep 20263111 AMAQI
3rd Sep 20263012 PMAQI
3rd Sep 2026371 PMAQI
3rd Sep 2026292 PMAQI
3rd Sep 2026283 PMAQI
3rd Sep 2026364 PMAQI
3rd Sep 2026385 PMAQI
3rd Sep 2026396 PMAQI
3rd Sep 2026357 PMAQI
3rd Sep 2026368 PMAQI
3rd Sep 2026399 PMAQI
3rd Sep 20263910 PMAQI
3rd Sep 20263911 PMAQI
4th Sep 20263912 AMAQI
4th Sep 2026371 AMAQI
4th Sep 2026352 AMAQI
4th Sep 2026333 AMAQI
4th Sep 2026344 AMAQI
4th Sep 2026385 AMAQI
4th Sep 2026436 AMAQI

20°C14/28°C

4th Sep 2026447 AMAQI
4th Sep 2026428 AMAQI
4th Sep 2026419 AMAQI
4th Sep 20264210 AMAQI
4th Sep 20264911 AMAQI
4th Sep 20265012 PMAQI
4th Sep 2026501 PMAQI
4th Sep 2026512 PMAQI
4th Sep 2026483 PMAQI
4th Sep 2026454 PMAQI
4th Sep 2026425 PMAQI
4th Sep 2026446 PMAQI
4th Sep 2026517 PMAQI
4th Sep 2026548 PMAQI
4th Sep 2026549 PMAQI
4th Sep 20264910 PMAQI
4th Sep 20264811 PMAQI
5th Sep 20264612 AMAQI
5th Sep 2026431 AMAQI
5th Sep 2026372 AMAQI
5th Sep 2026373 AMAQI
5th Sep 2026334 AMAQI
5th Sep 2026355 AMAQI
5th Sep 2026326 AMAQI

22°C18/29°C

5th Sep 2026367 AMAQI
5th Sep 2026398 AMAQI
5th Sep 2026419 AMAQI
5th Sep 20264210 AMAQI
5th Sep 20264011 AMAQI
5th Sep 20263712 PMAQI
5th Sep 2026431 PMAQI
5th Sep 2026412 PMAQI
5th Sep 2026433 PMAQI
5th Sep 2026434 PMAQI
5th Sep 2026405 PMAQI
5th Sep 2026366 PMAQI
5th Sep 2026337 PMAQI
5th Sep 2026388 PMAQI
5th Sep 2026459 PMAQI
5th Sep 20263210 PMAQI
5th Sep 20263611 PMAQI
6th Sep 20264412 AMAQI
6th Sep 2026471 AMAQI
6th Sep 2026442 AMAQI
6th Sep 2026413 AMAQI
6th Sep 2026404 AMAQI
6th Sep 2026425 AMAQI
6th Sep 2026416 AMAQI

21°C16/28°C

6th Sep 2026437 AMAQI
6th Sep 2026448 AMAQI
6th Sep 2026439 AMAQI
6th Sep 20264210 AMAQI
6th Sep 20264011 AMAQI
6th Sep 20264412 PMAQI
6th Sep 2026481 PMAQI
6th Sep 2026522 PMAQI
6th Sep 2026543 PMAQI
6th Sep 2026584 PMAQI
6th Sep 2026585 PMAQI
6th Sep 2026556 PMAQI
6th Sep 2026457 PMAQI
6th Sep 2026418 PMAQI
6th Sep 2026379 PMAQI
6th Sep 20263510 PMAQI
6th Sep 20264111 PMAQI
7th Sep 20265012 AMAQI
7th Sep 2026521 AMAQI
7th Sep 2026552 AMAQI
7th Sep 2026563 AMAQI
7th Sep 2026564 AMAQI
7th Sep 2026525 AMAQI
7th Sep 2026476 AMAQI

25°C20/33°C

7th Sep 2026487 AMAQI
7th Sep 2026488 AMAQI
7th Sep 2026489 AMAQI
7th Sep 20264810 AMAQI
7th Sep 20265011 AMAQI
7th Sep 20265212 PMAQI
7th Sep 2026531 PMAQI
7th Sep 2026512 PMAQI
7th Sep 2026513 PMAQI
7th Sep 2026474 PMAQI
7th Sep 2026485 PMAQI
7th Sep 2026506 PMAQI
7th Sep 2026477 PMAQI
7th Sep 2026428 PMAQI
7th Sep 2026399 PMAQI
7th Sep 20263510 PMAQI
7th Sep 20263411 PMAQI
8th Sep 20263412 AMAQI
8th Sep 2026311 AMAQI
8th Sep 2026312 AMAQI
8th Sep 2026323 AMAQI
8th Sep 2026324 AMAQI
8th Sep 2026395 AMAQI
8th Sep 2026466 AMAQI

20°C17/25°C

8th Sep 2026487 AMAQI
8th Sep 2026468 AMAQI
8th Sep 2026399 AMAQI
8th Sep 20263110 AMAQI
8th Sep 20263411 AMAQI
8th Sep 20263812 PMAQI
8th Sep 2026441 PMAQI
8th Sep 2026492 PMAQI
8th Sep 2026533 PMAQI
8th Sep 2026504 PMAQI
8th Sep 2026515 PMAQI
8th Sep 2026486 PMAQI
8th Sep 2026517 PMAQI
8th Sep 2026548 PMAQI
8th Sep 2026549 PMAQI
8th Sep 20265210 PMAQI
8th Sep 20264511 PMAQI
9th Sep 20264312 AMAQI
9th Sep 2026431 AMAQI
9th Sep 2026282 AMAQI
9th Sep 2026193 AMAQI
9th Sep 2026234 AMAQI
9th Sep 2026245 AMAQI
9th Sep 2026236 AMAQI

19°C15/24°C

9th Sep 2026217 AMAQI
9th Sep 2026218 AMAQI
9th Sep 2026209 AMAQI
9th Sep 20262310 AMAQI
9th Sep 20262311 AMAQI
9th Sep 20262312 PMAQI
9th Sep 2026301 PMAQI
9th Sep 2026212 PMAQI
9th Sep 2026263 PMAQI
9th Sep 2026254 PMAQI
9th Sep 2026265 PMAQI
9th Sep 2026286 PMAQI
9th Sep 2026277 PMAQI
9th Sep 2026268 PMAQI
9th Sep 2026299 PMAQI
9th Sep 20262510 PMAQI
9th Sep 20262411 PMAQI
10th Sep 20262712 AMAQI
10th Sep 2026251 AMAQI
10th Sep 2026242 AMAQI
10th Sep 2026253 AMAQI
10th Sep 2026244 AMAQI
10th Sep 2026255 AMAQI
10th Sep 2026276 AMAQI

17°C15/20°C

10th Sep 2026277 AMAQI
10th Sep 2026278 AMAQI
10th Sep 2026249 AMAQI
10th Sep 20262610 AMAQI
10th Sep 20262811 AMAQI
10th Sep 20263512 PMAQI
10th Sep 2026371 PMAQI
10th Sep 2026362 PMAQI
10th Sep 2026343 PMAQI
10th Sep 2026294 PMAQI
10th Sep 2026255 PMAQI
10th Sep 2026246 PMAQI
10th Sep 2026287 PMAQI
10th Sep 2026238 PMAQI
10th Sep 2026239 PMAQI
10th Sep 20262610 PMAQI
10th Sep 20263411 PMAQI
11th Sep 20263712 AMAQI
11th Sep 2026401 AMAQI
11th Sep 2026412 AMAQI
11th Sep 2026403 AMAQI
11th Sep 2026324 AMAQI
11th Sep 2026265 AMAQI
11th Sep 2026306 AMAQI

16°C12/21°C

11th Sep 2026337 AMAQI
11th Sep 2026298 AMAQI
11th Sep 2026269 AMAQI
11th Sep 20263210 AMAQI
11th Sep 20263811 AMAQI
11th Sep 20264312 PMAQI
11th Sep 2026451 PMAQI
11th Sep 2026482 PMAQI
11th Sep 2026463 PMAQI
11th Sep 2026454 PMAQI
11th Sep 2026455 PMAQI
11th Sep 2026276 PMAQI
11th Sep 2026267 PMAQI
11th Sep 2026248 PMAQI
11th Sep 2026229 PMAQI
11th Sep 20262010 PMAQI
11th Sep 20262611 PMAQI
12th Sep 20262912 AMAQI
12th Sep 2026301 AMAQI
12th Sep 2026342 AMAQI
12th Sep 2026323 AMAQI
12th Sep 2026324 AMAQI
12th Sep 2026345 AMAQI
12th Sep 2026336 AMAQI

16°C11/22°C

12th Sep 2026307 AMAQI
12th Sep 2026308 AMAQI
12th Sep 2026339 AMAQI
12th Sep 20263010 AMAQI
12th Sep 20262711 AMAQI
12th Sep 20263512 PMAQI
12th Sep 2026421 PMAQI
12th Sep 2026392 PMAQI
12th Sep 2026373 PMAQI
12th Sep 2026324 PMAQI
12th Sep 2026305 PMAQI
12th Sep 2026316 PMAQI
12th Sep 2026327 PMAQI
12th Sep 2026298 PMAQI
12th Sep 2026289 PMAQI
12th Sep 20263011 PMAQI
13th Sep 20262812 AMAQI
13th Sep 2026341 AMAQI
13th Sep 2026452 AMAQI
13th Sep 2026523 AMAQI
13th Sep 2026514 AMAQI
13th Sep 2026445 AMAQI
13th Sep 2026386 AMAQI

17°C13/24°C

13th Sep 2026377 AMAQI
13th Sep 2026358 AMAQI
13th Sep 2026329 AMAQI
13th Sep 20263610 AMAQI
13th Sep 20264511 AMAQI
13th Sep 20264612 PMAQI
13th Sep 2026411 PMAQI
13th Sep 2026372 PMAQI
13th Sep 2026343 PMAQI
13th Sep 2026344 PMAQI
13th Sep 2026425 PMAQI
13th Sep 2026486 PMAQI
13th Sep 2026497 PMAQI
13th Sep 2026428 PMAQI
13th Sep 2026349 PMAQI
13th Sep 20263710 PMAQI
13th Sep 20263511 PMAQI
14th Sep 20262712 AMAQI
14th Sep 2026311 AMAQI
14th Sep 2026422 AMAQI
14th Sep 2026323 AMAQI
14th Sep 2026404 AMAQI
14th Sep 2026295 AMAQI
14th Sep 2026306 AMAQI

19°C14/26°C

14th Sep 2026317 AMAQI
14th Sep 2026308 AMAQI
14th Sep 2026319 AMAQI
14th Sep 20263610 AMAQI
14th Sep 20263911 AMAQI
14th Sep 20263912 PMAQI
14th Sep 2026421 PMAQI
14th Sep 2026472 PMAQI
14th Sep 2026493 PMAQI
14th Sep 2026464 PMAQI
14th Sep 2026415 PMAQI
14th Sep 2026406 PMAQI
14th Sep 2026407 PMAQI
14th Sep 2026468 PMAQI
14th Sep 2026499 PMAQI
14th Sep 20264210 PMAQI
14th Sep 20263211 PMAQI
15th Sep 20264112 AMAQI
15th Sep 2026351 AMAQI
15th Sep 2026382 AMAQI
15th Sep 2026393 AMAQI
15th Sep 2026404 AMAQI
15th Sep 2026385 AMAQI
15th Sep 2026366 AMAQI

21°C16/29°C

15th Sep 2026387 AMAQI
15th Sep 2026378 AMAQI
15th Sep 2026389 AMAQI
15th Sep 20263910 AMAQI
15th Sep 20264311 AMAQI
15th Sep 20264712 PMAQI
15th Sep 2026501 PMAQI
15th Sep 2026522 PMAQI
15th Sep 2026523 PMAQI
15th Sep 2026544 PMAQI
15th Sep 2026555 PMAQI
15th Sep 2026496 PMAQI
15th Sep 2026447 PMAQI
15th Sep 2026388 PMAQI
15th Sep 2026339 PMAQI
15th Sep 20262610 PMAQI
15th Sep 20262611 PMAQI
16th Sep 20262212 AMAQI
16th Sep 2026231 AMAQI
16th Sep 2026242 AMAQI
16th Sep 2026203 AMAQI
16th Sep 2026234 AMAQI
16th Sep 2026265 AMAQI
16th Sep 2026266 AMAQI

20°C18/24°C

16th Sep 2026257 AMAQI
16th Sep 2026248 AMAQI
16th Sep 2026269 AMAQI
16th Sep 20262310 AMAQI
16th Sep 20262311 AMAQI
16th Sep 20262312 PMAQI
16th Sep 2026241 PMAQI
16th Sep 2026242 PMAQI
16th Sep 2026233 PMAQI
16th Sep 2026244 PMAQI
16th Sep 2026225 PMAQI
16th Sep 2026236 PMAQI
16th Sep 2026277 PMAQI
16th Sep 2026308 PMAQI
16th Sep 2026269 PMAQI
16th Sep 20263110 PMAQI
16th Sep 20262511 PMAQI
17th Sep 20262412 AMAQI
17th Sep 2026251 AMAQI
17th Sep 2026222 AMAQI
17th Sep 2026243 AMAQI
17th Sep 2026234 AMAQI
17th Sep 2026235 AMAQI
17th Sep 2026216 AMAQI

17°C14/20°C

17th Sep 2026227 AMAQI
17th Sep 2026228 AMAQI
17th Sep 2026219 AMAQI
17th Sep 20262410 AMAQI
17th Sep 20263111 AMAQI
17th Sep 20262612 PMAQI
17th Sep 2026341 PMAQI
17th Sep 2026392 PMAQI
17th Sep 2026393 PMAQI
17th Sep 2026394 PMAQI
17th Sep 2026365 PMAQI
17th Sep 2026306 PMAQI
17th Sep 2026287 PMAQI
17th Sep 2026238 PMAQI
17th Sep 2026339 PMAQI
17th Sep 20263510 PMAQI
17th Sep 20263211 PMAQI
18th Sep 20262812 AMAQI
18th Sep 2026301 AMAQI
18th Sep 2026312 AMAQI
18th Sep 2026303 AMAQI
18th Sep 2026294 AMAQI
18th Sep 2026345 AMAQI
18th Sep 2026366 AMAQI

16°C14/19°C

18th Sep 2026287 AMAQI
18th Sep 2026248 AMAQI
18th Sep 2026289 AMAQI
18th Sep 20262610 AMAQI
18th Sep 20262611 AMAQI
18th Sep 20262712 PMAQI
18th Sep 2026341 PMAQI
18th Sep 2026402 PMAQI
18th Sep 2026393 PMAQI
18th Sep 2026324 PMAQI
18th Sep 2026305 PMAQI
18th Sep 2026366 PMAQI
18th Sep 2026367 PMAQI
18th Sep 2026318 PMAQI
18th Sep 2026319 PMAQI
18th Sep 20262610 PMAQI
18th Sep 20263411 PMAQI
19th Sep 20263312 AMAQI
19th Sep 2026271 AMAQI
19th Sep 2026262 AMAQI
19th Sep 2026273 AMAQI
19th Sep 2026254 AMAQI
19th Sep 2026245 AMAQI
19th Sep 2026286 AMAQI

15°C13/16°C

19th Sep 2026317 AMAQI
19th Sep 2026298 AMAQI
19th Sep 2026309 AMAQI
19th Sep 20263410 AMAQI
19th Sep 20263911 AMAQI
19th Sep 20263812 PMAQI
19th Sep 2026371 PMAQI
19th Sep 2026382 PMAQI
19th Sep 2026353 PMAQI
19th Sep 2026334 PMAQI
19th Sep 2026325 PMAQI
19th Sep 2026366 PMAQI
19th Sep 2026427 PMAQI
19th Sep 2026388 PMAQI
19th Sep 2026299 PMAQI
19th Sep 20263910 PMAQI
19th Sep 20264411 PMAQI
20th Sep 20264212 AMAQI
20th Sep 2026411 AMAQI
20th Sep 2026432 AMAQI
20th Sep 2026443 AMAQI
20th Sep 2026444 AMAQI
20th Sep 2026365 AMAQI
20th Sep 2026286 AMAQI

16°C12/23°C

20th Sep 2026427 AMAQI
20th Sep 2026398 AMAQI
20th Sep 2026379 AMAQI
20th Sep 20262710 AMAQI
20th Sep 20262911 AMAQI
20th Sep 20263612 PMAQI
20th Sep 2026451 PMAQI
20th Sep 2026462 PMAQI
20th Sep 2026473 PMAQI
20th Sep 2026464 PMAQI
20th Sep 2026465 PMAQI
20th Sep 2026476 PMAQI
20th Sep 2026487 PMAQI
20th Sep 2026398 PMAQI
20th Sep 2026579 PMAQI
20th Sep 20263210 PMAQI
20th Sep 20266011 PMAQI
21st Sep 20265012 AMAQI
21st Sep 2026481 AMAQI
21st Sep 2026442 AMAQI
21st Sep 2026373 AMAQI
21st Sep 2026314 AMAQI
21st Sep 2026305 AMAQI
21st Sep 2026286 AMAQI

17°C13/23°C

21st Sep 2026267 AMAQI
21st Sep 2026278 AMAQI
21st Sep 2026339 AMAQI
21st Sep 20264010 AMAQI
21st Sep 20264211 AMAQI
21st Sep 20264812 PMAQI
21st Sep 2026481 PMAQI
21st Sep 2026482 PMAQI
21st Sep 2026513 PMAQI
21st Sep 2026534 PMAQI
21st Sep 2026565 PMAQI
21st Sep 2026526 PMAQI
21st Sep 2026447 PMAQI
21st Sep 2026318 PMAQI
21st Sep 2026299 PMAQI
21st Sep 20262910 PMAQI
21st Sep 20263811 PMAQI
22nd Sep 20263612 AMAQI
22nd Sep 2026341 AMAQI
22nd Sep 2026302 AMAQI
22nd Sep 2026283 AMAQI
22nd Sep 2026254 AMAQI
22nd Sep 2026225 AMAQI
22nd Sep 2026246 AMAQI

18°C14/24°C

22nd Sep 2026267 AMAQI
22nd Sep 2026248 AMAQI
22nd Sep 2026259 AMAQI
22nd Sep 20263010 AMAQI
22nd Sep 20263511 AMAQI
22nd Sep 20263812 PMAQI
22nd Sep 2026441 PMAQI
22nd Sep 2026472 PMAQI
22nd Sep 2026453 PMAQI
22nd Sep 2026424 PMAQI
22nd Sep 2026365 PMAQI
22nd Sep 2026356 PMAQI
22nd Sep 2026367 PMAQI
22nd Sep 2026288 PMAQI
22nd Sep 2026249 PMAQI
22nd Sep 20262510 PMAQI
22nd Sep 20263811 PMAQI
23rd Sep 20264012 AMAQI
23rd Sep 2026401 AMAQI
23rd Sep 2026392 AMAQI
23rd Sep 2026383 AMAQI
23rd Sep 2026324 AMAQI
23rd Sep 2026285 AMAQI
23rd Sep 2026296 AMAQI

18°C14/23°C

23rd Sep 2026297 AMAQI
23rd Sep 2026288 AMAQI
23rd Sep 2026299 AMAQI
23rd Sep 20262410 AMAQI
23rd Sep 20263111 AMAQI
23rd Sep 20263612 PMAQI
23rd Sep 2026411 PMAQI
23rd Sep 2026402 PMAQI
23rd Sep 2026423 PMAQI
23rd Sep 2026404 PMAQI
23rd Sep 2026465 PMAQI
23rd Sep 2026496 PMAQI
23rd Sep 2026457 PMAQI
23rd Sep 2026398 PMAQI
23rd Sep 2026449 PMAQI
23rd Sep 20265610 PMAQI
23rd Sep 20266011 PMAQI
24th Sep 20266312 AMAQI
24th Sep 2026561 AMAQI
24th Sep 2026522 AMAQI
24th Sep 2026503 AMAQI
24th Sep 2026454 AMAQI
24th Sep 2026455 AMAQI
24th Sep 2026366 AMAQI

18°C14/25°C

24th Sep 2026367 AMAQI
24th Sep 2026358 AMAQI
24th Sep 2026349 AMAQI
24th Sep 20263610 AMAQI
24th Sep 20263911 AMAQI
24th Sep 20264412 PMAQI
24th Sep 2026471 PMAQI
24th Sep 2026532 PMAQI
24th Sep 2026523 PMAQI
24th Sep 2026484 PMAQI
24th Sep 2026445 PMAQI
24th Sep 2026446 PMAQI
24th Sep 2026437 PMAQI
24th Sep 2026508 PMAQI
24th Sep 2026569 PMAQI
24th Sep 20265610 PMAQI
24th Sep 20265811 PMAQI
25th Sep 20266612 AMAQI
25th Sep 2026671 AMAQI
25th Sep 2026652 AMAQI
25th Sep 2026613 AMAQI
25th Sep 2026584 AMAQI
25th Sep 2026545 AMAQI
25th Sep 2026516 AMAQI

22°C16/33°C

25th Sep 2026467 AMAQI
25th Sep 2026478 AMAQI
25th Sep 2026509 AMAQI
25th Sep 20265110 AMAQI
25th Sep 20265011 AMAQI
25th Sep 20266012 PMAQI
25th Sep 2026571 PMAQI
25th Sep 2026582 PMAQI
25th Sep 2026583 PMAQI
25th Sep 2026564 PMAQI
25th Sep 2026545 PMAQI
25th Sep 2026496 PMAQI
25th Sep 2026487 PMAQI
25th Sep 2026458 PMAQI
25th Sep 2026449 PMAQI
25th Sep 20264210 PMAQI
25th Sep 20264211 PMAQI
26th Sep 20263612 AMAQI
26th Sep 2026361 AMAQI
26th Sep 2026362 AMAQI
26th Sep 2026363 AMAQI
26th Sep 2026384 AMAQI
26th Sep 2026425 AMAQI
26th Sep 2026436 AMAQI

18°C16/21°C

26th Sep 2026397 AMAQI
26th Sep 2026388 AMAQI
26th Sep 2026379 AMAQI
26th Sep 20263710 AMAQI
26th Sep 20263911 AMAQI
26th Sep 20263412 PMAQI
26th Sep 2026281 PMAQI
26th Sep 2026252 PMAQI
26th Sep 2026233 PMAQI
26th Sep 2026214 PMAQI
26th Sep 2026215 PMAQI
26th Sep 2026196 PMAQI
26th Sep 2026207 PMAQI
26th Sep 2026208 PMAQI
26th Sep 2026259 PMAQI
26th Sep 20262810 PMAQI
26th Sep 20262611 PMAQI
27th Sep 20263012 AMAQI
27th Sep 2026341 AMAQI
27th Sep 2026372 AMAQI
27th Sep 2026343 AMAQI
27th Sep 2026344 AMAQI
27th Sep 2026305 AMAQI
27th Sep 2026306 AMAQI

18°C16/23°C

27th Sep 2026317 AMAQI
27th Sep 2026318 AMAQI
27th Sep 2026299 AMAQI
27th Sep 20262810 AMAQI
27th Sep 20263011 AMAQI
27th Sep 20263112 PMAQI
27th Sep 2026381 PMAQI
27th Sep 2026432 PMAQI
27th Sep 2026483 PMAQI
27th Sep 2026514 PMAQI
27th Sep 2026505 PMAQI
27th Sep 2026446 PMAQI
27th Sep 2026427 PMAQI
27th Sep 2026418 PMAQI
27th Sep 2026409 PMAQI
27th Sep 20264110 PMAQI
27th Sep 20264611 PMAQI
28th Sep 20264812 AMAQI
28th Sep 2026481 AMAQI
28th Sep 2026502 AMAQI
28th Sep 2026523 AMAQI
28th Sep 2026544 AMAQI
28th Sep 2026545 AMAQI
28th Sep 2026516 AMAQI

20°C16/28°C

28th Sep 2026507 AMAQI
7 AM
28th Sep 2026528 AMAQI
28th Sep 2026519 AMAQI
28th Sep 20265410 AMAQI
28th Sep 20265311 AMAQI
28th Sep 20265312 PMAQI
28th Sep 2026541 PMAQI
1 PM
28th Sep 2026552 PMAQI
28th Sep 2026543 PMAQI
28th Sep 2026464 PMAQI
28th Sep 2026405 PMAQI
28th Sep 2026426 PMAQI
28th Sep 2026407 PMAQI
28th Sep 2026478 PMAQI
8 PM
28th Sep 2026539 PMAQI
28th Sep 20265010 PMAQI
28th Sep 20264411 PMAQI
1 AM
6 AM

22°C16/28°C

Day time
Avg. Highest Time
1 PM - 7 PM

41AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
9 AM

33AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 7 PM (Avg. 41), while the lowest AQI was between 9 AM to 9 AM (Avg. 33).
Night time
Avg. Highest Time
12 AM - 11 PM

37AQI

10 hours / Day
300 hours / Month
Avg. Lowest Time
12 AM - 6 AM

37AQI

7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 37), while the lowest AQI was between 12 AM to 6 AM (Avg. 37).

2026 Days Vs Air Quality

Donostia, Basque Country, Spain

2026

93%

249

7%

19

Total number of days with different AQI categories in last 271 days in 2026 (94 days remaining)

Good
249 Days
Moderate
19 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 93%

Health Risk Level:

Very Low

In 2026, 93% of 271 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

Donostia, Basque Country, Spain

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
48AQI (US)
2nd January 2026
40AQI (US)
3rd January 2026
44AQI (US)
4th January 2026
40AQI (US)
5th January 2026
41AQI (US)
6th January 2026
32AQI (US)
7th January 2026
37AQI (US)
8th January 2026
21AQI (US)
9th January 2026
20AQI (US)
10th January 2026
25AQI (US)
11th January 2026
24AQI (US)
12th January 2026
14AQI (US)
13th January 2026
17AQI (US)
14th January 2026
28AQI (US)
15th January 2026
22AQI (US)
16th January 2026
14AQI (US)
17th January 2026
31AQI (US)
18th January 2026
27AQI (US)
19th January 2026
20AQI (US)
20th January 2026
20AQI (US)
21st January 2026
13AQI (US)
22nd January 2026
31AQI (US)
23rd January 2026
38AQI (US)
24th January 2026
30AQI (US)
25th January 2026
37AQI (US)
26th January 2026
42AQI (US)
27th January 2026
31AQI (US)
28th January 2026
28AQI (US)
29th January 2026
41AQI (US)
30th January 2026
35AQI (US)
31st January 2026
38AQI (US)
1st February 2026
50AQI (US)
2nd February 2026
24AQI (US)
3rd February 2026
14AQI (US)
4th February 2026
23AQI (US)
5th February 2026
39AQI (US)
6th February 2026
22AQI (US)
7th February 2026
18AQI (US)
8th February 2026
33AQI (US)
9th February 2026
40AQI (US)
10th February 2026
41AQI (US)
11th February 2026
46AQI (US)
12th February 2026
36AQI (US)
13th February 2026
23AQI (US)
14th February 2026
45AQI (US)
15th February 2026
33AQI (US)
16th February 2026
26AQI (US)
17th February 2026
32AQI (US)
18th February 2026
22AQI (US)
19th February 2026
27AQI (US)
20th February 2026
36AQI (US)
21st February 2026
30AQI (US)
22nd February 2026
33AQI (US)
23rd February 2026
43AQI (US)
24th February 2026
34AQI (US)
25th February 2026
42AQI (US)
26th February 2026
58AQI (US)
27th February 2026
43AQI (US)
28th February 2026
15AQI (US)
1st March 2026
26AQI (US)
2nd March 2026
52AQI (US)
3rd March 2026
42AQI (US)
4th March 2026
57AQI (US)
5th March 2026
67AQI (US)
6th March 2026
29AQI (US)
7th March 2026
27AQI (US)
8th March 2026
25AQI (US)
9th March 2026
30AQI (US)
10th March 2026
23AQI (US)
11th March 2026
34AQI (US)
12th March 2026
21AQI (US)
13th March 2026
33AQI (US)
14th March 2026
15AQI (US)
15th March 2026
20AQI (US)
16th March 2026
32AQI (US)
17th March 2026
34AQI (US)
18th March 2026
29AQI (US)
19th March 2026
26AQI (US)
20th March 2026
30AQI (US)
21st March 2026
39AQI (US)
22nd March 2026
51AQI (US)
23rd March 2026
56AQI (US)
24th March 2026
58AQI (US)
25th March 2026
48AQI (US)
26th March 2026
18AQI (US)
27th March 2026
21AQI (US)
28th March 2026
27AQI (US)
29th March 2026
24AQI (US)
30th March 2026
22AQI (US)
31st March 2026
39AQI (US)
1st April 2026
28AQI (US)
2nd April 2026
19AQI (US)
3rd April 2026
26AQI (US)
4th April 2026
28AQI (US)
5th April 2026
39AQI (US)
6th April 2026
23AQI (US)
7th April 2026
15AQI (US)
8th April 2026
44AQI (US)
9th April 2026
51AQI (US)
10th April 2026
43AQI (US)
11th April 2026
34AQI (US)
12th April 2026
13AQI (US)
13th April 2026
23AQI (US)
14th April 2026
26AQI (US)
15th April 2026
28AQI (US)
16th April 2026
29AQI (US)
17th April 2026
18th April 2026
28AQI (US)
19th April 2026
28AQI (US)
20th April 2026
30AQI (US)
21st April 2026
44AQI (US)
22nd April 2026
23rd April 2026
30AQI (US)
24th April 2026
30AQI (US)
25th April 2026
34AQI (US)
26th April 2026
25AQI (US)
27th April 2026
29AQI (US)
28th April 2026
37AQI (US)
29th April 2026
37AQI (US)
30th April 2026
22AQI (US)
1st May 2026
31AQI (US)
2nd May 2026
26AQI (US)
3rd May 2026
19AQI (US)
4th May 2026
16AQI (US)
5th May 2026
25AQI (US)
6th May 2026
27AQI (US)
7th May 2026
24AQI (US)
8th May 2026
23AQI (US)
9th May 2026
10th May 2026
18AQI (US)
11th May 2026
18AQI (US)
12th May 2026
19AQI (US)
13th May 2026
22AQI (US)
14th May 2026
24AQI (US)
15th May 2026
27AQI (US)
16th May 2026
36AQI (US)
17th May 2026
35AQI (US)
18th May 2026
38AQI (US)
19th May 2026
41AQI (US)
20th May 2026
41AQI (US)
21st May 2026
40AQI (US)
22nd May 2026
45AQI (US)
23rd May 2026
44AQI (US)
24th May 2026
45AQI (US)
25th May 2026
39AQI (US)
26th May 2026
30AQI (US)
27th May 2026
47AQI (US)
28th May 2026
53AQI (US)
29th May 2026
45AQI (US)
30th May 2026
24AQI (US)
31st May 2026
21AQI (US)
1st June 2026
24AQI (US)
2nd June 2026
24AQI (US)
3rd June 2026
20AQI (US)
4th June 2026
21AQI (US)
5th June 2026
18AQI (US)
6th June 2026
22AQI (US)
7th June 2026
22AQI (US)
8th June 2026
23AQI (US)
9th June 2026
16AQI (US)
10th June 2026
20AQI (US)
11th June 2026
20AQI (US)
12th June 2026
22AQI (US)
13th June 2026
22AQI (US)
14th June 2026
22AQI (US)
15th June 2026
40AQI (US)
16th June 2026
31AQI (US)
17th June 2026
32AQI (US)
18th June 2026
37AQI (US)
19th June 2026
35AQI (US)
20th June 2026
33AQI (US)
21st June 2026
27AQI (US)
22nd June 2026
56AQI (US)
23rd June 2026
66AQI (US)
24th June 2026
52AQI (US)
25th June 2026
54AQI (US)
26th June 2026
41AQI (US)
27th June 2026
35AQI (US)
28th June 2026
26AQI (US)
29th June 2026
24AQI (US)
30th June 2026
23AQI (US)
1st July 2026
12AQI (US)
2nd July 2026
16AQI (US)
3rd July 2026
20AQI (US)
4th July 2026
22AQI (US)
5th July 2026
35AQI (US)
6th July 2026
30AQI (US)
7th July 2026
54AQI (US)
8th July 2026
56AQI (US)
9th July 2026
42AQI (US)
10th July 2026
35AQI (US)
11th July 2026
40AQI (US)
12th July 2026
40AQI (US)
13th July 2026
46AQI (US)
14th July 2026
41AQI (US)
15th July 2026
38AQI (US)
16th July 2026
36AQI (US)
17th July 2026
40AQI (US)
18th July 2026
48AQI (US)
19th July 2026
48AQI (US)
20th July 2026
53AQI (US)
21st July 2026
33AQI (US)
22nd July 2026
34AQI (US)
23rd July 2026
47AQI (US)
24th July 2026
52AQI (US)
25th July 2026
48AQI (US)
26th July 2026
44AQI (US)
27th July 2026
39AQI (US)
28th July 2026
41AQI (US)
29th July 2026
55AQI (US)
30th July 2026
42AQI (US)
31st July 2026
30AQI (US)
1st August 2026
36AQI (US)
2nd August 2026
32AQI (US)
3rd August 2026
33AQI (US)
4th August 2026
40AQI (US)
5th August 2026
32AQI (US)
6th August 2026
30AQI (US)
7th August 2026
33AQI (US)
8th August 2026
34AQI (US)
9th August 2026
45AQI (US)
10th August 2026
36AQI (US)
11th August 2026
39AQI (US)
12th August 2026
41AQI (US)
13th August 2026
45AQI (US)
14th August 2026
39AQI (US)
15th August 2026
31AQI (US)
16th August 2026
24AQI (US)
17th August 2026
27AQI (US)
18th August 2026
37AQI (US)
19th August 2026
41AQI (US)
20th August 2026
37AQI (US)
21st August 2026
32AQI (US)
22nd August 2026
30AQI (US)
23rd August 2026
40AQI (US)
24th August 2026
41AQI (US)
25th August 2026
36AQI (US)
26th August 2026
36AQI (US)
27th August 2026
37AQI (US)
28th August 2026
23AQI (US)
29th August 2026
34AQI (US)
30th August 2026
31AQI (US)
31st August 2026
32AQI (US)
1st September 2026
39AQI (US)
2nd September 2026
40AQI (US)
3rd September 2026
34AQI (US)
4th September 2026
44AQI (US)
5th September 2026
39AQI (US)
6th September 2026
45AQI (US)
7th September 2026
48AQI (US)
8th September 2026
43AQI (US)
9th September 2026
26AQI (US)
10th September 2026
28AQI (US)
11th September 2026
34AQI (US)
12th September 2026
32AQI (US)
13th September 2026
40AQI (US)
14th September 2026
38AQI (US)
15th September 2026
41AQI (US)
16th September 2026
25AQI (US)
17th September 2026
28AQI (US)
18th September 2026
31AQI (US)
19th September 2026
33AQI (US)
20th September 2026
42AQI (US)
21st September 2026
40AQI (US)
22nd September 2026
32AQI (US)
23rd September 2026
38AQI (US)
24th September 2026
47AQI (US)
25th September 2026
53AQI (US)
26th September 2026
31AQI (US)
27th September 2026
37AQI (US)
28th September 2026
50AQI (US)
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

30AQI (US)

33AQI (US)

34AQI (US)

30AQI (US)

31AQI (US)

30AQI (US)

39AQI (US)

35AQI (US)

38AQI (US)

No. of days

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

202633AQI (US)

31
27
1
25
6
27
1
29
1
26
4
26
5
31
27
1
249
19

Highest AQI (US) recorded in

July

39AQI (US)

Lowest AQI (US) recorded in

June

30AQI (US)

202536AQI (US)

27
4
26
2
28
3
28
2
31
19
11
31
23
8
30
14
17
30
27
4
314
51

Highest AQI (US) recorded in

October

48AQI (US)

Lowest AQI (US) recorded in

September

27AQI (US)

202433AQI (US)

27
4
24
5
31
29
1
30
1
29
1
28
3
31
30
30
1
27
3
28
3
344
22

Highest AQI (US) recorded in

November

38AQI (US)

Lowest AQI (US) recorded in

October

28AQI (US)

202336AQI (US)

29
2
13
15
25
6
30
22
9
26
4
31
30
1
25
5
27
4
29
30
1
317
47

Highest AQI (US) recorded in

February

51AQI (US)

Lowest AQI (US) recorded in

November

27AQI (US)

202237AQI (US)

19
11
21
1
26
5
30
29
2
25
5
18
7
3
29
26
5
30
30
1
286
37

Highest AQI (US) recorded in

January

43AQI (US)

Lowest AQI (US) recorded in

November

28AQI (US)

202136AQI (US)

23
7
24
4
22
9
26
4
31
30
28
3
31
29
1
31
30
28
3
333
31

Highest AQI (US) recorded in

March

47AQI (US)

Lowest AQI (US) recorded in

August

31AQI (US)

202033AQI (US)

7
6
20
1
18
29
1
31
31
28
2
30
1
27
3
31
252
14

Highest AQI (US) recorded in

March

49AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2022(Avg.)
37AQI (US)
Least Polluted Year Recorded
2020(Avg.)
33AQI (US)

Donostia's annual 2026 AQI (US) (33) shows an average percentage change of -5.9% (improved AQI (US)) compared to previous years: 2020 (33), 2021 (36), 2022 (37), 2023 (36), 2024 (33), 2025 (36).