Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Sion, Valais, Switzerland 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+

December Air Quality Analysis

Sion, Valais, Switzerland

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Dec 2025
59AQI
Lowest AQI recorded on
31st Dec 2021
8AQI

Same Day Analysis (9th December ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 45 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 9th Dec - 10th Dec 2025

Sion, Valais, Switzerland

AQI
Day
Night
.

7 AM9th Dec 2025

4 PM

6 AM10th Dec 2025

Day time
Avg. Highest Time
1PM9th Dec

52AQI

Avg. Lowest Time
9AM9th Dec

33AQI

Night time
Avg. Highest Time
1AM10th Dec

75AQI

Avg. Lowest Time
7AM9th Dec

32AQI

In the last 24 hours,

Sion's AQI reached its highest point of 75 at 1 AM during the Night, while the lowest point, 32, was recorded at 7 AM during the Night between 9th Dec and 10th Dec 2025.

Day & Night AQI Trend : Nov - Dec 2025

Sion, Valais, Switzerland

NovDec
10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th
Day
Night
10th Nov 2025537 AMAQI
10th Nov 2025558 AMAQI
10th Nov 2025469 AMAQI
10th Nov 20254510 AMAQI
10th Nov 20255211 AMAQI
10th Nov 20255312 PMAQI
10th Nov 2025371 PMAQI
10th Nov 2025532 PMAQI
10th Nov 2025573 PMAQI
10th Nov 2025534 PMAQI
10th Nov 2025525 PMAQI
10th Nov 2025516 PMAQI
10th Nov 2025517 PMAQI
10th Nov 2025528 PMAQI
10th Nov 2025679 PMAQI
10th Nov 20256510 PMAQI
10th Nov 20256311 PMAQI
11th Nov 20256312 AMAQI
11th Nov 2025711 AMAQI
11th Nov 2025612 AMAQI
11th Nov 2025463 AMAQI
11th Nov 2025404 AMAQI
11th Nov 2025405 AMAQI
11th Nov 2025406 AMAQI

1°C-2/7°C

11th Nov 2025427 AMAQI
11th Nov 2025538 AMAQI
11th Nov 2025559 AMAQI
11th Nov 20255710 AMAQI
11th Nov 20256011 AMAQI
11th Nov 20255612 PMAQI
11th Nov 2025561 PMAQI
11th Nov 2025472 PMAQI
11th Nov 2025443 PMAQI
11th Nov 2025474 PMAQI
11th Nov 2025475 PMAQI
11th Nov 2025506 PMAQI
11th Nov 2025527 PMAQI
11th Nov 2025538 PMAQI
11th Nov 2025549 PMAQI
11th Nov 20255510 PMAQI
11th Nov 20255511 PMAQI
12th Nov 20256512 AMAQI
12th Nov 2025691 AMAQI
12th Nov 2025532 AMAQI
12th Nov 2025423 AMAQI
12th Nov 2025394 AMAQI
12th Nov 2025355 AMAQI
12th Nov 2025346 AMAQI

2°C-1/8°C

12th Nov 2025467 AMAQI
12th Nov 2025448 AMAQI
12th Nov 2025449 AMAQI
12th Nov 20254210 AMAQI
12th Nov 20254011 AMAQI
12th Nov 20254012 PMAQI
12th Nov 2025511 PMAQI
12th Nov 2025542 PMAQI
12th Nov 2025543 PMAQI
12th Nov 2025564 PMAQI
12th Nov 2025565 PMAQI
12th Nov 2025526 PMAQI
12th Nov 2025547 PMAQI
12th Nov 2025558 PMAQI
12th Nov 2025589 PMAQI
12th Nov 20256210 PMAQI
12th Nov 20256311 PMAQI
13th Nov 20256112 AMAQI
13th Nov 2025581 AMAQI
13th Nov 2025582 AMAQI
13th Nov 2025473 AMAQI
13th Nov 2025454 AMAQI
13th Nov 2025385 AMAQI
13th Nov 2025336 AMAQI

4°C1/10°C

13th Nov 2025347 AMAQI
13th Nov 2025388 AMAQI
13th Nov 2025399 AMAQI
13th Nov 20254010 AMAQI
13th Nov 20253911 AMAQI
13th Nov 20255112 PMAQI
13th Nov 2025531 PMAQI
13th Nov 2025542 PMAQI
13th Nov 2025563 PMAQI
13th Nov 2025554 PMAQI
13th Nov 2025485 PMAQI
13th Nov 2025496 PMAQI
13th Nov 2025527 PMAQI
13th Nov 2025568 PMAQI
13th Nov 2025589 PMAQI
13th Nov 20255810 PMAQI
13th Nov 20256211 PMAQI
14th Nov 20256912 AMAQI
14th Nov 2025661 AMAQI
14th Nov 2025612 AMAQI
14th Nov 2025603 AMAQI
14th Nov 2025574 AMAQI
14th Nov 2025495 AMAQI
14th Nov 2025486 AMAQI

5°C2/11°C

14th Nov 2025507 AMAQI
14th Nov 2025428 AMAQI
14th Nov 2025489 AMAQI
14th Nov 20255010 AMAQI
14th Nov 20255111 AMAQI
14th Nov 20255312 PMAQI
14th Nov 2025591 PMAQI
14th Nov 2025582 PMAQI
14th Nov 2025553 PMAQI
14th Nov 2025554 PMAQI
14th Nov 2025585 PMAQI
14th Nov 2025606 PMAQI
14th Nov 2025567 PMAQI
14th Nov 2025578 PMAQI
14th Nov 2025569 PMAQI
14th Nov 20255610 PMAQI
14th Nov 20255911 PMAQI
15th Nov 20256212 AMAQI
15th Nov 2025621 AMAQI
15th Nov 2025602 AMAQI
15th Nov 2025543 AMAQI
15th Nov 2025424 AMAQI
15th Nov 2025355 AMAQI
15th Nov 2025326 AMAQI

4°C1/9°C

15th Nov 2025427 AMAQI
15th Nov 2025518 AMAQI
15th Nov 2025519 AMAQI
15th Nov 20255110 AMAQI
15th Nov 20255311 AMAQI
15th Nov 20254212 PMAQI
15th Nov 2025241 PMAQI
15th Nov 2025232 PMAQI
15th Nov 2025443 PMAQI
15th Nov 2025414 PMAQI
15th Nov 2025345 PMAQI
15th Nov 2025356 PMAQI
15th Nov 2025367 PMAQI
15th Nov 2025418 PMAQI
15th Nov 2025459 PMAQI
15th Nov 20254410 PMAQI
15th Nov 20254811 PMAQI
16th Nov 20255312 AMAQI
16th Nov 2025551 AMAQI
16th Nov 2025562 AMAQI
16th Nov 2025553 AMAQI
16th Nov 2025534 AMAQI
16th Nov 2025445 AMAQI
16th Nov 2025386 AMAQI

5°C3/9°C

16th Nov 2025527 AMAQI
16th Nov 2025518 AMAQI
16th Nov 2025429 AMAQI
16th Nov 20253310 AMAQI
16th Nov 20253311 AMAQI
16th Nov 20253312 PMAQI
16th Nov 2025361 PMAQI
16th Nov 2025442 PMAQI
16th Nov 2025423 PMAQI
16th Nov 2025444 PMAQI
16th Nov 2025515 PMAQI
16th Nov 2025486 PMAQI
16th Nov 2025517 PMAQI
16th Nov 2025548 PMAQI
16th Nov 2025589 PMAQI
16th Nov 20256210 PMAQI
16th Nov 20256211 PMAQI
17th Nov 20255812 AMAQI
17th Nov 2025581 AMAQI
17th Nov 2025612 AMAQI
17th Nov 2025573 AMAQI
17th Nov 2025524 AMAQI
17th Nov 2025535 AMAQI
17th Nov 2025456 AMAQI

3°C2/6°C

17th Nov 2025427 AMAQI
17th Nov 2025408 AMAQI
17th Nov 2025509 AMAQI
17th Nov 20255010 AMAQI
17th Nov 20255011 AMAQI
17th Nov 20254112 PMAQI
17th Nov 2025391 PMAQI
17th Nov 2025462 PMAQI
17th Nov 2025553 PMAQI
17th Nov 2025294 PMAQI
17th Nov 2025225 PMAQI
17th Nov 2025346 PMAQI
17th Nov 2025377 PMAQI
17th Nov 2025398 PMAQI
17th Nov 2025379 PMAQI
17th Nov 20253410 PMAQI
17th Nov 20252811 PMAQI
18th Nov 20252812 AMAQI
18th Nov 2025281 AMAQI
18th Nov 2025462 AMAQI
18th Nov 2025513 AMAQI
18th Nov 2025404 AMAQI
18th Nov 2025345 AMAQI
18th Nov 2025336 AMAQI

0°C-7/1°C

18th Nov 2025347 AMAQI
18th Nov 2025378 AMAQI
18th Nov 2025399 AMAQI
18th Nov 20254910 AMAQI
18th Nov 20255211 AMAQI
18th Nov 20255412 PMAQI
18th Nov 2025541 PMAQI
18th Nov 2025482 PMAQI
18th Nov 2025443 PMAQI
18th Nov 2025444 PMAQI
18th Nov 2025525 PMAQI
18th Nov 2025546 PMAQI
18th Nov 2025547 PMAQI
18th Nov 2025558 PMAQI
18th Nov 2025559 PMAQI
18th Nov 20256910 PMAQI
18th Nov 20258511 PMAQI
19th Nov 20257712 AMAQI
19th Nov 2025791 AMAQI
19th Nov 2025722 AMAQI
19th Nov 2025613 AMAQI
19th Nov 2025584 AMAQI
19th Nov 2025545 AMAQI
19th Nov 2025546 AMAQI

-6°C-10/-1°C

19th Nov 2025547 AMAQI
19th Nov 2025548 AMAQI
19th Nov 2025549 AMAQI
19th Nov 20255510 AMAQI
19th Nov 20255611 AMAQI
19th Nov 20255112 PMAQI
19th Nov 2025451 PMAQI
19th Nov 2025542 PMAQI
19th Nov 2025513 PMAQI
19th Nov 2025504 PMAQI
19th Nov 2025525 PMAQI
19th Nov 2025566 PMAQI
19th Nov 2025597 PMAQI
19th Nov 2025618 PMAQI
19th Nov 2025629 PMAQI
19th Nov 20256210 PMAQI
19th Nov 20256111 PMAQI
20th Nov 20256312 AMAQI
20th Nov 2025571 AMAQI
20th Nov 2025562 AMAQI
20th Nov 2025483 AMAQI
20th Nov 2025314 AMAQI
20th Nov 2025295 AMAQI
20th Nov 2025256 AMAQI

-5°C-7/1°C

20th Nov 2025227 AMAQI
20th Nov 2025228 AMAQI
20th Nov 2025279 AMAQI
20th Nov 20252510 AMAQI
20th Nov 20252211 AMAQI
20th Nov 20252212 PMAQI
20th Nov 2025221 PMAQI
20th Nov 2025252 PMAQI
20th Nov 2025283 PMAQI
20th Nov 2025284 PMAQI
20th Nov 2025325 PMAQI
20th Nov 2025446 PMAQI
20th Nov 2025457 PMAQI
20th Nov 2025448 PMAQI
20th Nov 2025499 PMAQI
20th Nov 20254810 PMAQI
20th Nov 20254411 PMAQI
21st Nov 20254212 AMAQI
21st Nov 2025401 AMAQI
21st Nov 2025432 AMAQI
21st Nov 2025373 AMAQI
21st Nov 2025294 AMAQI
21st Nov 2025295 AMAQI
21st Nov 2025286 AMAQI

-6°C-9/-4°C

21st Nov 2025237 AMAQI
21st Nov 2025228 AMAQI
21st Nov 2025229 AMAQI
21st Nov 20253110 AMAQI
21st Nov 20253311 AMAQI
21st Nov 20253712 PMAQI
21st Nov 2025371 PMAQI
21st Nov 2025342 PMAQI
21st Nov 2025343 PMAQI
21st Nov 2025334 PMAQI
21st Nov 2025335 PMAQI
21st Nov 2025336 PMAQI
21st Nov 2025337 PMAQI
21st Nov 2025388 PMAQI
21st Nov 2025419 PMAQI
21st Nov 20255110 PMAQI
21st Nov 20255311 PMAQI
22nd Nov 20255512 AMAQI
22nd Nov 2025551 AMAQI
22nd Nov 2025492 AMAQI
22nd Nov 2025503 AMAQI
22nd Nov 2025484 AMAQI
22nd Nov 2025485 AMAQI
22nd Nov 2025476 AMAQI

-10°C-14/-6°C

22nd Nov 2025477 AMAQI
22nd Nov 2025498 AMAQI
22nd Nov 2025519 AMAQI
22nd Nov 20255510 AMAQI
22nd Nov 20255611 AMAQI
22nd Nov 20255512 PMAQI
22nd Nov 2025551 PMAQI
22nd Nov 2025512 PMAQI
22nd Nov 2025503 PMAQI
22nd Nov 2025514 PMAQI
22nd Nov 2025545 PMAQI
22nd Nov 2025556 PMAQI
22nd Nov 2025577 PMAQI
22nd Nov 2025588 PMAQI
22nd Nov 2025599 PMAQI
22nd Nov 20258410 PMAQI
22nd Nov 20257211 PMAQI
23rd Nov 20257712 AMAQI
23rd Nov 2025631 AMAQI
23rd Nov 2025552 AMAQI
23rd Nov 2025583 AMAQI
23rd Nov 2025554 AMAQI
23rd Nov 2025445 AMAQI
23rd Nov 2025446 AMAQI

-12°C-15/-6°C

23rd Nov 2025457 AMAQI
23rd Nov 2025528 AMAQI
23rd Nov 2025539 AMAQI
23rd Nov 20255310 AMAQI
23rd Nov 20255411 AMAQI
23rd Nov 20254412 PMAQI
23rd Nov 2025351 PMAQI
23rd Nov 2025392 PMAQI
23rd Nov 2025463 PMAQI
23rd Nov 2025344 PMAQI
23rd Nov 2025455 PMAQI
23rd Nov 2025556 PMAQI
23rd Nov 2025557 PMAQI
23rd Nov 2025698 PMAQI
23rd Nov 2025729 PMAQI
23rd Nov 20256710 PMAQI
23rd Nov 20256111 PMAQI
24th Nov 20255812 AMAQI
24th Nov 2025591 AMAQI
24th Nov 2025572 AMAQI
24th Nov 2025543 AMAQI
24th Nov 2025434 AMAQI
24th Nov 2025325 AMAQI
24th Nov 2025316 AMAQI

-5°C-12/0°C

24th Nov 2025307 AMAQI
24th Nov 2025308 AMAQI
24th Nov 2025329 AMAQI
24th Nov 20254010 AMAQI
24th Nov 20252311 AMAQI
24th Nov 20252312 PMAQI
24th Nov 2025231 PMAQI
24th Nov 2025542 PMAQI
24th Nov 2025443 PMAQI
24th Nov 2025284 PMAQI
24th Nov 2025295 PMAQI
24th Nov 2025366 PMAQI
24th Nov 2025357 PMAQI
24th Nov 2025358 PMAQI
24th Nov 2025359 PMAQI
24th Nov 20253410 PMAQI
24th Nov 20253511 PMAQI
25th Nov 20253612 AMAQI
25th Nov 2025341 AMAQI
25th Nov 2025332 AMAQI
25th Nov 2025283 AMAQI
25th Nov 2025174 AMAQI
25th Nov 2025175 AMAQI
25th Nov 2025176 AMAQI

-3°C-4/-1°C

25th Nov 2025187 AMAQI
25th Nov 2025258 AMAQI
25th Nov 2025249 AMAQI
25th Nov 20253610 AMAQI
25th Nov 20253811 AMAQI
25th Nov 20253412 PMAQI
25th Nov 2025511 PMAQI
25th Nov 2025272 PMAQI
25th Nov 2025213 PMAQI
25th Nov 2025224 PMAQI
25th Nov 2025225 PMAQI
25th Nov 2025276 PMAQI
25th Nov 2025287 PMAQI
25th Nov 2025288 PMAQI
25th Nov 2025379 PMAQI
25th Nov 20254010 PMAQI
25th Nov 20254511 PMAQI
26th Nov 20254312 AMAQI
26th Nov 2025401 AMAQI
26th Nov 2025372 AMAQI
26th Nov 2025333 AMAQI
26th Nov 2025314 AMAQI
26th Nov 2025285 AMAQI
26th Nov 2025286 AMAQI

-5°C-9/-3°C

26th Nov 2025337 AMAQI
26th Nov 2025498 AMAQI
26th Nov 2025479 AMAQI
26th Nov 20255810 AMAQI
26th Nov 20253511 AMAQI
26th Nov 20253312 PMAQI
26th Nov 2025331 PMAQI
26th Nov 2025332 PMAQI
26th Nov 2025423 PMAQI
26th Nov 2025454 PMAQI
26th Nov 2025405 PMAQI
26th Nov 2025406 PMAQI
26th Nov 2025367 PMAQI
26th Nov 2025418 PMAQI
26th Nov 2025449 PMAQI
26th Nov 20254810 PMAQI
26th Nov 20254711 PMAQI
27th Nov 20254612 AMAQI
27th Nov 2025431 AMAQI
27th Nov 2025492 AMAQI
27th Nov 2025483 AMAQI
27th Nov 2025394 AMAQI
27th Nov 2025395 AMAQI
27th Nov 2025396 AMAQI

-7°C-11/-3°C

27th Nov 2025417 AMAQI
27th Nov 2025428 AMAQI
27th Nov 2025489 AMAQI
27th Nov 20255110 AMAQI
27th Nov 20255411 AMAQI
27th Nov 20255512 PMAQI
27th Nov 2025551 PMAQI
27th Nov 2025562 PMAQI
27th Nov 2025573 PMAQI
27th Nov 2025594 PMAQI
27th Nov 2025605 PMAQI
27th Nov 2025586 PMAQI
27th Nov 2025597 PMAQI
27th Nov 2025608 PMAQI
27th Nov 2025599 PMAQI
27th Nov 20256010 PMAQI
27th Nov 20256111 PMAQI
28th Nov 20256112 AMAQI
28th Nov 2025601 AMAQI
28th Nov 2025582 AMAQI
28th Nov 2025543 AMAQI
28th Nov 2025444 AMAQI
28th Nov 2025415 AMAQI
28th Nov 2025426 AMAQI

-9°C-13/-2°C

28th Nov 2025327 AMAQI
28th Nov 2025358 AMAQI
28th Nov 2025389 AMAQI
28th Nov 20253910 AMAQI
28th Nov 20254511 AMAQI
28th Nov 20256812 PMAQI
28th Nov 2025581 PMAQI
28th Nov 2025562 PMAQI
28th Nov 2025573 PMAQI
28th Nov 2025544 PMAQI
28th Nov 2025505 PMAQI
28th Nov 2025506 PMAQI
28th Nov 2025537 PMAQI
28th Nov 2025588 PMAQI
28th Nov 2025599 PMAQI
28th Nov 20256010 PMAQI
28th Nov 20256911 PMAQI
29th Nov 20256712 AMAQI
29th Nov 2025551 AMAQI
29th Nov 2025442 AMAQI
29th Nov 2025403 AMAQI
29th Nov 2025394 AMAQI
29th Nov 2025375 AMAQI
29th Nov 2025286 AMAQI

-4°C-8/1°C

29th Nov 2025287 AMAQI
29th Nov 2025288 AMAQI
29th Nov 2025339 AMAQI
29th Nov 20254310 AMAQI
29th Nov 20255311 AMAQI
29th Nov 20254812 PMAQI
29th Nov 2025391 PMAQI
29th Nov 2025402 PMAQI
29th Nov 2025403 PMAQI
29th Nov 2025464 PMAQI
29th Nov 2025545 PMAQI
29th Nov 2025466 PMAQI
29th Nov 2025457 PMAQI
29th Nov 2025458 PMAQI
29th Nov 2025559 PMAQI
29th Nov 20255810 PMAQI
29th Nov 20256011 PMAQI
30th Nov 20256112 AMAQI
30th Nov 2025531 AMAQI
30th Nov 2025482 AMAQI
30th Nov 2025593 AMAQI
30th Nov 2025334 AMAQI
30th Nov 2025285 AMAQI
30th Nov 2025286 AMAQI

-2°C-4/3°C

30th Nov 2025307 AMAQI
30th Nov 2025528 AMAQI
30th Nov 2025479 AMAQI
30th Nov 20254610 AMAQI
30th Nov 20254611 AMAQI
30th Nov 20255612 PMAQI
30th Nov 2025531 PMAQI
30th Nov 2025522 PMAQI
30th Nov 2025603 PMAQI
30th Nov 2025574 PMAQI
30th Nov 2025535 PMAQI
30th Nov 2025596 PMAQI
30th Nov 2025547 PMAQI
30th Nov 2025558 PMAQI
30th Nov 2025559 PMAQI
30th Nov 20255310 PMAQI
30th Nov 20255311 PMAQI
1st Dec 20255212 AMAQI
1st Dec 2025491 AMAQI
1st Dec 2025422 AMAQI
1st Dec 2025393 AMAQI
1st Dec 2025444 AMAQI
1st Dec 2025415 AMAQI
1st Dec 2025356 AMAQI

-1°C-3/2°C

1st Dec 2025347 AMAQI
1st Dec 2025378 AMAQI
1st Dec 2025399 AMAQI
1st Dec 20254510 AMAQI
1st Dec 20254411 AMAQI
1st Dec 20255412 PMAQI
1st Dec 2025561 PMAQI
1st Dec 2025552 PMAQI
1st Dec 2025553 PMAQI
1st Dec 2025544 PMAQI
1st Dec 2025525 PMAQI
1st Dec 2025536 PMAQI
1st Dec 2025557 PMAQI
1st Dec 2025558 PMAQI
1st Dec 2025559 PMAQI
1st Dec 20255610 PMAQI
1st Dec 20255611 PMAQI
2nd Dec 20255612 AMAQI
2nd Dec 2025561 AMAQI
2nd Dec 2025522 AMAQI
2nd Dec 2025483 AMAQI
2nd Dec 2025424 AMAQI
2nd Dec 2025255 AMAQI
2nd Dec 2025226 AMAQI

-4°C-8/0°C

2nd Dec 2025227 AMAQI
2nd Dec 2025278 AMAQI
2nd Dec 2025329 AMAQI
2nd Dec 20253410 AMAQI
2nd Dec 20253511 AMAQI
2nd Dec 20255812 PMAQI
2nd Dec 2025571 PMAQI
2nd Dec 2025482 PMAQI
2nd Dec 2025463 PMAQI
2nd Dec 2025404 PMAQI
2nd Dec 2025445 PMAQI
2nd Dec 2025456 PMAQI
2nd Dec 2025527 PMAQI
2nd Dec 2025568 PMAQI
2nd Dec 2025569 PMAQI
2nd Dec 20255910 PMAQI
2nd Dec 20256911 PMAQI
3rd Dec 20256612 AMAQI
3rd Dec 2025551 AMAQI
3rd Dec 2025542 AMAQI
3rd Dec 2025563 AMAQI
3rd Dec 2025594 AMAQI
3rd Dec 2025585 AMAQI
3rd Dec 2025596 AMAQI

-5°C-8/0°C

3rd Dec 2025557 AMAQI
3rd Dec 2025398 AMAQI
3rd Dec 2025289 AMAQI
3rd Dec 20254310 AMAQI
3rd Dec 20253911 AMAQI
3rd Dec 20253412 PMAQI
3rd Dec 2025531 PMAQI
3rd Dec 2025562 PMAQI
3rd Dec 2025563 PMAQI
3rd Dec 2025524 PMAQI
3rd Dec 2025545 PMAQI
3rd Dec 2025566 PMAQI
3rd Dec 2025567 PMAQI
3rd Dec 2025728 PMAQI
3rd Dec 2025689 PMAQI
3rd Dec 20256310 PMAQI
3rd Dec 20256211 PMAQI
4th Dec 20256212 AMAQI
4th Dec 2025601 AMAQI
4th Dec 2025582 AMAQI
4th Dec 2025583 AMAQI
4th Dec 2025584 AMAQI
4th Dec 2025565 AMAQI
4th Dec 2025566 AMAQI

-4°C-7/0°C

4th Dec 2025557 AMAQI
4th Dec 2025538 AMAQI
4th Dec 2025559 AMAQI
4th Dec 20255910 AMAQI
4th Dec 20255511 AMAQI
4th Dec 20255612 PMAQI
4th Dec 2025561 PMAQI
4th Dec 2025572 PMAQI
4th Dec 2025573 PMAQI
4th Dec 2025564 PMAQI
4th Dec 2025575 PMAQI
4th Dec 2025556 PMAQI
4th Dec 2025617 PMAQI
4th Dec 2025618 PMAQI
4th Dec 2025639 PMAQI
4th Dec 20256310 PMAQI
4th Dec 20256311 PMAQI
5th Dec 20256312 AMAQI
5th Dec 2025631 AMAQI
5th Dec 2025622 AMAQI
5th Dec 2025563 AMAQI
5th Dec 2025544 AMAQI
5th Dec 2025545 AMAQI
5th Dec 2025536 AMAQI

-3°C-7/0°C

5th Dec 2025537 AMAQI
5th Dec 2025538 AMAQI
5th Dec 2025529 AMAQI
5th Dec 20254910 AMAQI
5th Dec 20254411 AMAQI
5th Dec 20254412 PMAQI
5th Dec 2025411 PMAQI
5th Dec 2025392 PMAQI
5th Dec 2025393 PMAQI
5th Dec 2025454 PMAQI
5th Dec 2025535 PMAQI
5th Dec 2025536 PMAQI
5th Dec 2025537 PMAQI
5th Dec 2025588 PMAQI
5th Dec 2025739 PMAQI
5th Dec 20256710 PMAQI
5th Dec 20255711 PMAQI
6th Dec 20255812 AMAQI
6th Dec 2025581 AMAQI
6th Dec 2025572 AMAQI
6th Dec 2025513 AMAQI
6th Dec 2025424 AMAQI
6th Dec 2025395 AMAQI
6th Dec 2025396 AMAQI

-4°C-7/-1°C

6th Dec 2025347 AMAQI
6th Dec 2025338 AMAQI
6th Dec 2025339 AMAQI
6th Dec 20254310 AMAQI
6th Dec 20254511 AMAQI
6th Dec 20254412 PMAQI
6th Dec 2025391 PMAQI
6th Dec 2025372 PMAQI
6th Dec 2025333 PMAQI
6th Dec 2025334 PMAQI
6th Dec 2025365 PMAQI
6th Dec 2025406 PMAQI
6th Dec 2025407 PMAQI
6th Dec 2025428 PMAQI
6th Dec 2025509 PMAQI
6th Dec 20255710 PMAQI
6th Dec 20255711 PMAQI
7th Dec 20255612 AMAQI
7th Dec 2025621 AMAQI
7th Dec 2025582 AMAQI
7th Dec 2025533 AMAQI
7th Dec 2025544 AMAQI
7th Dec 2025425 AMAQI
7th Dec 2025286 AMAQI

-3°C-8/2°C

7th Dec 2025467 AMAQI
7th Dec 2025328 AMAQI
7th Dec 2025289 AMAQI
7th Dec 20253010 AMAQI
7th Dec 20253711 AMAQI
7th Dec 20253512 PMAQI
7th Dec 2025281 PMAQI
7th Dec 2025282 PMAQI
7th Dec 2025313 PMAQI
7th Dec 2025254 PMAQI
7th Dec 2025225 PMAQI
7th Dec 2025266 PMAQI
7th Dec 2025367 PMAQI
7th Dec 2025508 PMAQI
7th Dec 2025489 PMAQI
7th Dec 20254310 PMAQI
7th Dec 20254211 PMAQI
8th Dec 20254912 AMAQI
8th Dec 2025571 AMAQI
8th Dec 2025562 AMAQI
8th Dec 2025573 AMAQI
8th Dec 2025514 AMAQI
8th Dec 2025295 AMAQI
8th Dec 2025276 AMAQI

-1°C-4/0°C

8th Dec 2025287 AMAQI
8th Dec 2025328 AMAQI
8th Dec 2025379 AMAQI
8th Dec 20254210 AMAQI
8th Dec 20254311 AMAQI
8th Dec 20253912 PMAQI
8th Dec 2025391 PMAQI
8th Dec 2025392 PMAQI
8th Dec 2025483 PMAQI
8th Dec 2025514 PMAQI
8th Dec 2025455 PMAQI
8th Dec 2025466 PMAQI
8th Dec 2025507 PMAQI
8th Dec 2025508 PMAQI
8th Dec 2025569 PMAQI
8th Dec 20256410 PMAQI
8th Dec 20256511 PMAQI
9th Dec 20256612 AMAQI
9th Dec 2025601 AMAQI
9th Dec 2025532 AMAQI
9th Dec 2025383 AMAQI
9th Dec 2025304 AMAQI
9th Dec 2025285 AMAQI
9th Dec 2025286 AMAQI

-1°C-3/2°C

9th Dec 2025327 AMAQI
9th Dec 2025348 AMAQI
9th Dec 2025339 AMAQI
9th Dec 20254610 AMAQI
9th Dec 20255011 AMAQI
9th Dec 20255112 PMAQI
9th Dec 2025521 PMAQI
9th Dec 2025472 PMAQI
9th Dec 2025413 PMAQI
9th Dec 2025404 PMAQI
9th Dec 2025445 PMAQI
9th Dec 2025466 PMAQI
9th Dec 2025517 PMAQI
9th Dec 2025578 PMAQI
9th Dec 2025589 PMAQI
9th Dec 20255910 PMAQI
9th Dec 20255911 PMAQI
10th Dec 20256312 AMAQI
10th Dec 2025751 AMAQI
10th Dec 2025752 AMAQI
10th Dec 2025603 AMAQI
10th Dec 2025484 AMAQI
10th Dec 2025445 AMAQI
10th Dec 2025446 AMAQI

-1°C-3/4°C

10th Dec 2025447 AMAQI
7 AM
10th Dec 2025448 AMAQI
10th Dec 2025449 AMAQI
10th Dec 20255110 AMAQI
10th Dec 20255711 AMAQI
11 AM
10th Dec 20256112 PMAQI
4 PM
11 PM
6 AM

--°C/°C

Day time
Avg. Highest Time
10 AM - 3 PM

45AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
7 AM - 9 AM

40AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 3 PM (Avg. 45), while the lowest AQI was between 7 AM to 9 AM (Avg. 40).
Night time
Avg. Highest Time
12 AM - 1 AM

58AQI

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

38AQI

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. 58), while the lowest AQI was between 6 AM to 6 AM (Avg. 38).

2025 Days Vs Air Quality

Sion, Valais, Switzerland

2025

75%

258

25%

85

Total number of days with different AQI categories in last 344 days in 2025 (21 days remaining)

Good
258 Days
Moderate
85 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 75%

Health Risk Level:

Low

In 2025, 75% of 344 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

Sion, Valais, Switzerland

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
78AQI
2nd January 2025
49AQI
3rd January 2025
34AQI
4th January 2025
46AQI
5th January 2025
54AQI
6th January 2025
40AQI
7th January 2025
28AQI
8th January 2025
29AQI
9th January 2025
29AQI
10th January 2025
29AQI
11th January 2025
34AQI
12th January 2025
43AQI
13th January 2025
44AQI
14th January 2025
58AQI
15th January 2025
68AQI
16th January 2025
61AQI
17th January 2025
68AQI
18th January 2025
71AQI
19th January 2025
87AQI
20th January 2025
78AQI
21st January 2025
65AQI
22nd January 2025
65AQI
23rd January 2025
46AQI
24th January 2025
42AQI
25th January 2025
37AQI
26th January 2025
28AQI
27th January 2025
27AQI
28th January 2025
22AQI
29th January 2025
24AQI
30th January 2025
31AQI
31st January 2025
34AQI
1st February 2025
40AQI
2nd February 2025
47AQI
3rd February 2025
49AQI
4th February 2025
59AQI
5th February 2025
64AQI
6th February 2025
70AQI
7th February 2025
71AQI
8th February 2025
64AQI
9th February 2025
72AQI
10th February 2025
68AQI
11th February 2025
60AQI
12th February 2025
48AQI
13th February 2025
49AQI
14th February 2025
42AQI
15th February 2025
57AQI
16th February 2025
64AQI
17th February 2025
76AQI
18th February 2025
82AQI
19th February 2025
82AQI
20th February 2025
71AQI
21st February 2025
61AQI
22nd February 2025
54AQI
23rd February 2025
47AQI
24th February 2025
50AQI
25th February 2025
43AQI
26th February 2025
28AQI
27th February 2025
31AQI
28th February 2025
31AQI
1st March 2025
37AQI
2nd March 2025
48AQI
3rd March 2025
54AQI
4th March 2025
51AQI
5th March 2025
48AQI
6th March 2025
48AQI
7th March 2025
50AQI
8th March 2025
53AQI
9th March 2025
56AQI
10th March 2025
42AQI
11th March 2025
33AQI
12th March 2025
29AQI
13th March 2025
24AQI
14th March 2025
28AQI
15th March 2025
46AQI
16th March 2025
22AQI
17th March 2025
30AQI
18th March 2025
33AQI
19th March 2025
31AQI
20th March 2025
31AQI
21st March 2025
38AQI
22nd March 2025
25AQI
23rd March 2025
19AQI
24th March 2025
23AQI
25th March 2025
25AQI
26th March 2025
41AQI
27th March 2025
42AQI
28th March 2025
39AQI
29th March 2025
44AQI
30th March 2025
36AQI
31st March 2025
28AQI
1st April 2025
28AQI
2nd April 2025
32AQI
3rd April 2025
32AQI
4th April 2025
34AQI
5th April 2025
33AQI
6th April 2025
30AQI
7th April 2025
28AQI
8th April 2025
35AQI
9th April 2025
36AQI
10th April 2025
35AQI
11th April 2025
35AQI
12th April 2025
35AQI
13th April 2025
37AQI
14th April 2025
28AQI
15th April 2025
22AQI
16th April 2025
21AQI
17th April 2025
22AQI
18th April 2025
31AQI
19th April 2025
20AQI
20th April 2025
18AQI
21st April 2025
15AQI
22nd April 2025
17AQI
23rd April 2025
20AQI
24th April 2025
15AQI
25th April 2025
18AQI
26th April 2025
18AQI
27th April 2025
24AQI
28th April 2025
22AQI
29th April 2025
28AQI
30th April 2025
26AQI
1st May 2025
33AQI
2nd May 2025
35AQI
3rd May 2025
38AQI
4th May 2025
25AQI
5th May 2025
18AQI
6th May 2025
18AQI
7th May 2025
31AQI
8th May 2025
42AQI
9th May 2025
47AQI
10th May 2025
26AQI
11th May 2025
25AQI
12th May 2025
20AQI
13th May 2025
19AQI
14th May 2025
22AQI
15th May 2025
27AQI
16th May 2025
25AQI
17th May 2025
18AQI
18th May 2025
24AQI
19th May 2025
31AQI
20th May 2025
29AQI
21st May 2025
24AQI
22nd May 2025
20AQI
23rd May 2025
22AQI
24th May 2025
20AQI
25th May 2025
21AQI
26th May 2025
21AQI
27th May 2025
19AQI
28th May 2025
21AQI
29th May 2025
19AQI
30th May 2025
18AQI
31st May 2025
22AQI
1st June 2025
27AQI
2nd June 2025
29AQI
3rd June 2025
26AQI
4th June 2025
30AQI
5th June 2025
23AQI
6th June 2025
24AQI
7th June 2025
20AQI
8th June 2025
44AQI
9th June 2025
60AQI
10th June 2025
74AQI
11th June 2025
90AQI
12th June 2025
75AQI
13th June 2025
65AQI
14th June 2025
56AQI
15th June 2025
55AQI
16th June 2025
33AQI
17th June 2025
38AQI
18th June 2025
46AQI
19th June 2025
50AQI
20th June 2025
56AQI
21st June 2025
52AQI
22nd June 2025
55AQI
23rd June 2025
54AQI
24th June 2025
51AQI
25th June 2025
47AQI
26th June 2025
49AQI
27th June 2025
40AQI
28th June 2025
31AQI
29th June 2025
32AQI
30th June 2025
39AQI
1st July 2025
33AQI
2nd July 2025
33AQI
3rd July 2025
37AQI
4th July 2025
51AQI
5th July 2025
49AQI
6th July 2025
34AQI
7th July 2025
24AQI
8th July 2025
19AQI
9th July 2025
20AQI
10th July 2025
22AQI
11th July 2025
26AQI
12th July 2025
28AQI
13th July 2025
31AQI
14th July 2025
32AQI
15th July 2025
32AQI
16th July 2025
37AQI
17th July 2025
23AQI
18th July 2025
21AQI
19th July 2025
23AQI
20th July 2025
27AQI
21st July 2025
20AQI
22nd July 2025
17AQI
23rd July 2025
20AQI
24th July 2025
18AQI
25th July 2025
17AQI
26th July 2025
19AQI
27th July 2025
21AQI
28th July 2025
17AQI
29th July 2025
21AQI
30th July 2025
25AQI
31st July 2025
25AQI
1st August 2025
31AQI
2nd August 2025
24AQI
3rd August 2025
20AQI
4th August 2025
21AQI
5th August 2025
23AQI
6th August 2025
23AQI
7th August 2025
28AQI
8th August 2025
36AQI
9th August 2025
52AQI
10th August 2025
58AQI
11th August 2025
58AQI
12th August 2025
60AQI
13th August 2025
63AQI
14th August 2025
60AQI
15th August 2025
54AQI
16th August 2025
58AQI
17th August 2025
56AQI
18th August 2025
50AQI
19th August 2025
48AQI
20th August 2025
45AQI
21st August 2025
31AQI
22nd August 2025
26AQI
23rd August 2025
30AQI
24th August 2025
27AQI
25th August 2025
26AQI
26th August 2025
30AQI
27th August 2025
50AQI
28th August 2025
35AQI
29th August 2025
21AQI
30th August 2025
16AQI
31st August 2025
16AQI
1st September 2025
15AQI
2nd September 2025
16AQI
3rd September 2025
17AQI
4th September 2025
20AQI
5th September 2025
18AQI
6th September 2025
17AQI
7th September 2025
20AQI
8th September 2025
26AQI
9th September 2025
25AQI
10th September 2025
25AQI
11th September 2025
20AQI
12th September 2025
18AQI
13th September 2025
18AQI
14th September 2025
19AQI
15th September 2025
17AQI
16th September 2025
18AQI
17th September 2025
18AQI
18th September 2025
20AQI
19th September 2025
24AQI
20th September 2025
27AQI
21st September 2025
28AQI
22nd September 2025
18AQI
23rd September 2025
14AQI
24th September 2025
14AQI
25th September 2025
19AQI
26th September 2025
14AQI
27th September 2025
12AQI
28th September 2025
14AQI
29th September 2025
33AQI
30th September 2025
30AQI
1st October 2025
46AQI
2nd October 2025
53AQI
3rd October 2025
52AQI
4th October 2025
47AQI
5th October 2025
39AQI
6th October 2025
43AQI
7th October 2025
50AQI
8th October 2025
51AQI
9th October 2025
57AQI
10th October 2025
56AQI
11th October 2025
54AQI
12th October 2025
55AQI
13th October 2025
58AQI
14th October 2025
60AQI
15th October 2025
60AQI
16th October 2025
63AQI
17th October 2025
66AQI
18th October 2025
60AQI
19th October 2025
57AQI
20th October 2025
59AQI
21st October 2025
47AQI
22nd October 2025
34AQI
23rd October 2025
28AQI
24th October 2025
28AQI
25th October 2025
29AQI
26th October 2025
31AQI
27th October 2025
29AQI
28th October 2025
43AQI
29th October 2025
39AQI
30th October 2025
41AQI
31st October 2025
43AQI
1st November 2025
44AQI
2nd November 2025
33AQI
3rd November 2025
36AQI
4th November 2025
49AQI
5th November 2025
51AQI
6th November 2025
46AQI
7th November 2025
52AQI
8th November 2025
53AQI
9th November 2025
55AQI
10th November 2025
56AQI
11th November 2025
52AQI
12th November 2025
51AQI
13th November 2025
50AQI
14th November 2025
56AQI
15th November 2025
44AQI
16th November 2025
49AQI
17th November 2025
44AQI
18th November 2025
48AQI
19th November 2025
59AQI
20th November 2025
37AQI
21st November 2025
36AQI
22nd November 2025
55AQI
23rd November 2025
54AQI
24th November 2025
38AQI
25th November 2025
29AQI
26th November 2025
39AQI
27th November 2025
52AQI
28th November 2025
52AQI
29th November 2025
45AQI
30th November 2025
51AQI
1st December 2025
48AQI
2nd December 2025
46AQI
3rd December 2025
56AQI
4th December 2025
59AQI
5th December 2025
55AQI
6th December 2025
46AQI
7th December 2025
42AQI
8th December 2025
50AQI
9th December 2025
45AQI
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

47AQI

56AQI

37AQI

27AQI

25AQI

46AQI

27AQI

38AQI

20AQI

48AQI

47AQI

50AQI

No. of days

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

202538AQI

20
11
12
16
27
4
30
31
18
12
30
1
22
9
30
16
15
16
14
6
3
258
85

Highest AQI recorded in

February

56AQI

Lowest AQI recorded in

September

20AQI

202427AQI

31
29
31
29
1
31
30
31
31
30
31
26
4
18
13
348
18

Highest AQI recorded in

December

46AQI

Lowest AQI recorded in

October

19AQI

202325AQI

28
28
31
30
31
30
31
31
30
31
29
30
360

Highest AQI recorded in

June

34AQI

Lowest AQI recorded in

November

18AQI

202224AQI

31
21
30
1
30
31
30
23
4
29
29
30
31
319
1

Highest AQI recorded in

July

33AQI

Lowest AQI recorded in

October

17AQI

202122AQI

30
25
3
31
28
31
30
31
31
30
31
30
31
359
3

Highest AQI recorded in

April

29AQI

Lowest AQI recorded in

October

15AQI

202023AQI

13
21
18
30
30
31
30
31
30
31
265

Highest AQI recorded in

April

31AQI

Lowest AQI recorded in

October

14AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
38AQI
Least Polluted Year Recorded
2021(Avg.)
22AQI

Sion's annual 2025 AQI (38) shows an average percentage change of 58.5% (worsened AQI) compared to previous years: 2020 (23), 2021 (22), 2022 (24), 2023 (25), 2024 (27).