Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Vientiane, Viangchan, Laos 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

Vientiane, Viangchan, Laos

2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Sep 2023
98AQI
Lowest AQI recorded on
26th Sep 2025
22AQI

Same Day Analysis (29th September):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 57 of Moderate air quality on the same day.

Day & Night AQI Trend: 29th Sep - 30th Sep 2026

Vientiane, Viangchan, Laos

AQI
Day
Night
.

5 AM29th Sep 2026

6 PM

4 AM30th Sep 2026

Day time
Avg. Highest Time
10AM29th Sep

72AQI

Avg. Lowest Time
6AM29th Sep

44AQI

Night time
Avg. Highest Time
9PM29th Sep

66AQI

Avg. Lowest Time
3AM30th Sep

40AQI

In the last 24 hours,

Vientiane's AQI reached its highest point of 72 at 10 AM during the Day, while the lowest point, 40, was recorded at 3 AM during the Night between 29th Sep and 30th Sep 2026.

Day & Night AQI Trend : Sep 2026

Vientiane, Viangchan, Laos

Sep
01st - 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 - 29th29th - 30th30th
Day
Night
1st Sep 2026295 AMAQI
1st Sep 2026346 AMAQI
1st Sep 2026407 AMAQI
1st Sep 2026468 AMAQI
1st Sep 2026449 AMAQI
1st Sep 20264010 AMAQI
1st Sep 20263611 AMAQI
1st Sep 20262812 PMAQI
1st Sep 2026341 PMAQI
1st Sep 2026282 PMAQI
1st Sep 2026253 PMAQI
1st Sep 2026244 PMAQI
1st Sep 2026225 PMAQI
1st Sep 2026216 PMAQI
1st Sep 2026287 PMAQI
1st Sep 2026208 PMAQI
1st Sep 2026209 PMAQI
1st Sep 20263310 PMAQI
1st Sep 20264811 PMAQI
2nd Sep 20263612 AMAQI
2nd Sep 2026381 AMAQI
2nd Sep 2026342 AMAQI
2nd Sep 2026303 AMAQI
2nd Sep 2026294 AMAQI

25°C22/31°C

2nd Sep 2026325 AMAQI
2nd Sep 2026336 AMAQI
2nd Sep 2026427 AMAQI
2nd Sep 2026408 AMAQI
2nd Sep 2026389 AMAQI
2nd Sep 20262410 AMAQI
2nd Sep 20262511 AMAQI
2nd Sep 20262212 PMAQI
2nd Sep 2026221 PMAQI
2nd Sep 2026222 PMAQI
2nd Sep 2026303 PMAQI
2nd Sep 2026284 PMAQI
2nd Sep 2026285 PMAQI
2nd Sep 2026316 PMAQI
2nd Sep 2026187 PMAQI
2nd Sep 2026558 PMAQI
2nd Sep 2026529 PMAQI
2nd Sep 20267910 PMAQI
2nd Sep 20267411 PMAQI
3rd Sep 20267012 AMAQI
3rd Sep 2026621 AMAQI
3rd Sep 2026482 AMAQI
3rd Sep 2026343 AMAQI
3rd Sep 2026344 AMAQI

27°C23/32°C

3rd Sep 2026345 AMAQI
3rd Sep 2026356 AMAQI
3rd Sep 2026367 AMAQI
3rd Sep 2026508 AMAQI
3rd Sep 2026429 AMAQI
3rd Sep 20263810 AMAQI
3rd Sep 20265011 AMAQI
3rd Sep 20265612 PMAQI
3rd Sep 2026581 PMAQI
3rd Sep 2026642 PMAQI
3rd Sep 2026523 PMAQI
3rd Sep 2026454 PMAQI
3rd Sep 2026445 PMAQI
3rd Sep 2026466 PMAQI
3rd Sep 2026457 PMAQI
3rd Sep 2026398 PMAQI
3rd Sep 2026349 PMAQI
3rd Sep 20263810 PMAQI
3rd Sep 20263711 PMAQI
4th Sep 20263612 AMAQI
4th Sep 2026381 AMAQI
4th Sep 2026382 AMAQI
4th Sep 2026383 AMAQI
4th Sep 2026484 AMAQI

27°C24/32°C

4th Sep 2026665 AMAQI
4th Sep 2026696 AMAQI
4th Sep 2026657 AMAQI
4th Sep 2026658 AMAQI
4th Sep 2026669 AMAQI
4th Sep 20266410 AMAQI
4th Sep 20266111 AMAQI
4th Sep 20265712 PMAQI
4th Sep 2026541 PMAQI
4th Sep 2026582 PMAQI
4th Sep 2026773 PMAQI
4th Sep 2026854 PMAQI
4th Sep 2026575 PMAQI
4th Sep 2026526 PMAQI
4th Sep 2026387 PMAQI
4th Sep 2026538 PMAQI
4th Sep 2026409 PMAQI
4th Sep 20263710 PMAQI
4th Sep 20263911 PMAQI
5th Sep 20264212 AMAQI
5th Sep 2026491 AMAQI
5th Sep 2026492 AMAQI
5th Sep 2026383 AMAQI
5th Sep 2026434 AMAQI

27°C24/31°C

5th Sep 2026405 AMAQI
5th Sep 2026446 AMAQI
5th Sep 2026517 AMAQI
5th Sep 2026548 AMAQI
5th Sep 2026499 AMAQI
5th Sep 20265010 AMAQI
5th Sep 20265011 AMAQI
5th Sep 20265012 PMAQI
5th Sep 2026521 PMAQI
5th Sep 2026522 PMAQI
5th Sep 2026563 PMAQI
5th Sep 2026534 PMAQI
5th Sep 2026555 PMAQI
5th Sep 2026546 PMAQI
5th Sep 2026547 PMAQI
5th Sep 2026578 PMAQI
5th Sep 2026619 PMAQI
5th Sep 20265910 PMAQI
5th Sep 20266511 PMAQI
6th Sep 20266212 AMAQI
6th Sep 2026621 AMAQI
6th Sep 2026402 AMAQI
6th Sep 2026283 AMAQI
6th Sep 2026264 AMAQI

26°C23/30°C

6th Sep 2026205 AMAQI
6th Sep 2026226 AMAQI
6th Sep 2026227 AMAQI
6th Sep 2026278 AMAQI
6th Sep 2026229 AMAQI
6th Sep 20262810 AMAQI
6th Sep 20262411 AMAQI
6th Sep 20262812 PMAQI
6th Sep 2026321 PMAQI
6th Sep 2026292 PMAQI
6th Sep 2026363 PMAQI
6th Sep 2026344 PMAQI
6th Sep 2026395 PMAQI
6th Sep 2026386 PMAQI
6th Sep 2026447 PMAQI
6th Sep 2026528 PMAQI
6th Sep 2026569 PMAQI
6th Sep 20265010 PMAQI
6th Sep 20262311 PMAQI
7th Sep 20262612 AMAQI
7th Sep 2026221 AMAQI
7th Sep 2026202 AMAQI
7th Sep 2026273 AMAQI
7th Sep 2026264 AMAQI

25°C23/30°C

7th Sep 2026225 AMAQI
7th Sep 2026286 AMAQI
7th Sep 2026337 AMAQI
7th Sep 2026178 AMAQI
7th Sep 2026199 AMAQI
7th Sep 20261810 AMAQI
7th Sep 20261811 AMAQI
7th Sep 20261812 PMAQI
7th Sep 2026201 PMAQI
7th Sep 2026182 PMAQI
7th Sep 2026263 PMAQI
7th Sep 2026234 PMAQI
7th Sep 2026215 PMAQI
7th Sep 2026226 PMAQI
7th Sep 2026217 PMAQI
7th Sep 2026288 PMAQI
7th Sep 2026319 PMAQI
7th Sep 20262810 PMAQI
7th Sep 20262511 PMAQI
8th Sep 20262412 AMAQI
8th Sep 2026361 AMAQI
8th Sep 2026412 AMAQI
8th Sep 2026403 AMAQI
8th Sep 2026374 AMAQI

25°C23/29°C

8th Sep 2026405 AMAQI
8th Sep 2026406 AMAQI
8th Sep 2026487 AMAQI
8th Sep 2026628 AMAQI
8th Sep 2026569 AMAQI
8th Sep 20265210 AMAQI
8th Sep 20263611 AMAQI
8th Sep 20262512 PMAQI
8th Sep 2026301 PMAQI
8th Sep 2026292 PMAQI
8th Sep 2026403 PMAQI
8th Sep 2026484 PMAQI
8th Sep 2026415 PMAQI
8th Sep 2026606 PMAQI
8th Sep 2026677 PMAQI
8th Sep 2026678 PMAQI
8th Sep 2026619 PMAQI
8th Sep 20266210 PMAQI
8th Sep 20266611 PMAQI
9th Sep 20266412 AMAQI
9th Sep 2026561 AMAQI
9th Sep 2026472 AMAQI
9th Sep 2026383 AMAQI
9th Sep 2026544 AMAQI

25°C23/29°C

9th Sep 2026565 AMAQI
9th Sep 2026426 AMAQI
9th Sep 2026647 AMAQI
9th Sep 2026608 AMAQI
9th Sep 2026589 AMAQI
9th Sep 20264410 AMAQI
9th Sep 20264211 AMAQI
9th Sep 20264812 PMAQI
9th Sep 2026431 PMAQI
9th Sep 2026402 PMAQI
9th Sep 2026303 PMAQI
9th Sep 2026284 PMAQI
9th Sep 2026495 PMAQI
9th Sep 2026446 PMAQI
9th Sep 2026537 PMAQI
9th Sep 2026588 PMAQI
9th Sep 2026389 PMAQI
9th Sep 20263010 PMAQI
9th Sep 20263711 PMAQI
10th Sep 20265412 AMAQI
10th Sep 2026461 AMAQI
10th Sep 2026392 AMAQI
10th Sep 2026303 AMAQI
10th Sep 2026254 AMAQI

26°C24/29°C

10th Sep 2026225 AMAQI
10th Sep 2026216 AMAQI
10th Sep 2026277 AMAQI
10th Sep 2026268 AMAQI
10th Sep 2026249 AMAQI
10th Sep 20262210 AMAQI
10th Sep 20262611 AMAQI
10th Sep 20263812 PMAQI
10th Sep 2026511 PMAQI
10th Sep 2026572 PMAQI
10th Sep 2026613 PMAQI
10th Sep 2026604 PMAQI
10th Sep 2026555 PMAQI
10th Sep 2026536 PMAQI
10th Sep 2026537 PMAQI
10th Sep 2026548 PMAQI
10th Sep 2026489 PMAQI
10th Sep 20264910 PMAQI
10th Sep 20265011 PMAQI
11th Sep 20265412 AMAQI
11th Sep 2026561 AMAQI
11th Sep 2026542 AMAQI
11th Sep 2026543 AMAQI
11th Sep 2026544 AMAQI

26°C23/30°C

11th Sep 2026585 AMAQI
11th Sep 2026566 AMAQI
11th Sep 2026627 AMAQI
11th Sep 2026628 AMAQI
11th Sep 2026579 AMAQI
11th Sep 20265510 AMAQI
11th Sep 20265411 AMAQI
11th Sep 20265212 PMAQI
11th Sep 2026451 PMAQI
11th Sep 2026442 PMAQI
11th Sep 2026463 PMAQI
11th Sep 2026424 PMAQI
11th Sep 2026495 PMAQI
11th Sep 2026516 PMAQI
11th Sep 2026537 PMAQI
11th Sep 2026638 PMAQI
11th Sep 2026609 PMAQI
11th Sep 20267210 PMAQI
11th Sep 20267211 PMAQI
12th Sep 20267312 AMAQI
12th Sep 2026661 AMAQI
12th Sep 2026692 AMAQI
12th Sep 2026713 AMAQI
12th Sep 2026704 AMAQI

26°C22/30°C

12th Sep 2026675 AMAQI
12th Sep 2026686 AMAQI
12th Sep 2026767 AMAQI
12th Sep 2026758 AMAQI
12th Sep 2026689 AMAQI
12th Sep 20266310 AMAQI
12th Sep 20266411 AMAQI
12th Sep 20265912 PMAQI
12th Sep 2026561 PMAQI
12th Sep 2026552 PMAQI
12th Sep 2026553 PMAQI
12th Sep 2026554 PMAQI
12th Sep 2026545 PMAQI
12th Sep 2026536 PMAQI
12th Sep 2026537 PMAQI
12th Sep 2026608 PMAQI
12th Sep 2026659 PMAQI
12th Sep 20266210 PMAQI
12th Sep 20266711 PMAQI
13th Sep 20266912 AMAQI
13th Sep 2026681 AMAQI
13th Sep 2026672 AMAQI
13th Sep 2026704 AMAQI

26°C22/31°C

13th Sep 2026685 AMAQI
13th Sep 2026706 AMAQI
13th Sep 2026707 AMAQI
13th Sep 2026738 AMAQI
13th Sep 2026769 AMAQI
13th Sep 20267110 AMAQI
13th Sep 20266511 AMAQI
13th Sep 20266212 PMAQI
13th Sep 2026581 PMAQI
13th Sep 2026532 PMAQI
13th Sep 2026453 PMAQI
13th Sep 2026514 PMAQI
13th Sep 2026545 PMAQI
13th Sep 2026556 PMAQI
13th Sep 2026627 PMAQI
13th Sep 2026758 PMAQI
13th Sep 2026819 PMAQI
13th Sep 20267510 PMAQI
13th Sep 20267311 PMAQI
14th Sep 20267012 AMAQI
14th Sep 2026671 AMAQI
14th Sep 2026662 AMAQI
14th Sep 2026543 AMAQI
14th Sep 2026534 AMAQI

25°C22/31°C

14th Sep 2026565 AMAQI
14th Sep 2026576 AMAQI
14th Sep 2026607 AMAQI
14th Sep 2026568 AMAQI
14th Sep 2026589 AMAQI
14th Sep 20265710 AMAQI
14th Sep 20265611 AMAQI
14th Sep 20265712 PMAQI
14th Sep 2026481 PMAQI
14th Sep 2026522 PMAQI
14th Sep 2026523 PMAQI
14th Sep 2026464 PMAQI
14th Sep 2026505 PMAQI
14th Sep 2026506 PMAQI
14th Sep 2026417 PMAQI
14th Sep 2026428 PMAQI
14th Sep 2026269 PMAQI
14th Sep 20263010 PMAQI
14th Sep 20262311 PMAQI
15th Sep 20263312 AMAQI
15th Sep 2026291 AMAQI
15th Sep 2026282 AMAQI
15th Sep 2026343 AMAQI
15th Sep 2026264 AMAQI

22°C21/24°C

15th Sep 2026315 AMAQI
15th Sep 2026286 AMAQI
15th Sep 2026237 AMAQI
15th Sep 2026268 AMAQI
15th Sep 2026249 AMAQI
15th Sep 20262110 AMAQI
15th Sep 20262211 AMAQI
15th Sep 20262612 PMAQI
15th Sep 2026241 PMAQI
15th Sep 2026262 PMAQI
15th Sep 2026283 PMAQI
15th Sep 2026244 PMAQI
15th Sep 2026245 PMAQI
15th Sep 2026286 PMAQI
15th Sep 2026257 PMAQI
15th Sep 2026248 PMAQI
15th Sep 2026249 PMAQI
15th Sep 20262410 PMAQI
15th Sep 20262411 PMAQI
16th Sep 20262412 AMAQI
16th Sep 2026211 AMAQI
16th Sep 2026222 AMAQI
16th Sep 2026223 AMAQI
16th Sep 2026224 AMAQI

22°C21/25°C

16th Sep 2026265 AMAQI
16th Sep 2026226 AMAQI
16th Sep 2026267 AMAQI
16th Sep 2026218 AMAQI
16th Sep 2026259 AMAQI
16th Sep 20262210 AMAQI
16th Sep 20262211 AMAQI
16th Sep 20262412 PMAQI
16th Sep 2026231 PMAQI
16th Sep 2026232 PMAQI
16th Sep 2026243 PMAQI
16th Sep 2026214 PMAQI
16th Sep 2026355 PMAQI
16th Sep 2026626 PMAQI
16th Sep 2026647 PMAQI
16th Sep 2026628 PMAQI
16th Sep 2026649 PMAQI
16th Sep 20266210 PMAQI
16th Sep 20266011 PMAQI
17th Sep 20265612 AMAQI
17th Sep 2026591 AMAQI
17th Sep 2026532 AMAQI
17th Sep 2026513 AMAQI
17th Sep 2026284 AMAQI

23°C22/24°C

17th Sep 2026355 AMAQI
17th Sep 2026446 AMAQI
17th Sep 2026497 AMAQI
17th Sep 2026738 AMAQI
17th Sep 2026679 AMAQI
17th Sep 20266410 AMAQI
17th Sep 20266011 AMAQI
17th Sep 20266312 PMAQI
17th Sep 2026331 PMAQI
17th Sep 2026322 PMAQI
17th Sep 2026333 PMAQI
17th Sep 2026294 PMAQI
17th Sep 2026325 PMAQI
17th Sep 2026616 PMAQI
17th Sep 2026617 PMAQI
17th Sep 2026708 PMAQI
17th Sep 2026779 PMAQI
17th Sep 20266410 PMAQI
17th Sep 20265411 PMAQI
18th Sep 20265412 AMAQI
18th Sep 2026481 AMAQI
18th Sep 2026502 AMAQI
18th Sep 2026453 AMAQI
18th Sep 2026444 AMAQI

23°C22/25°C

18th Sep 2026545 AMAQI
18th Sep 2026526 AMAQI
18th Sep 2026587 AMAQI
18th Sep 2026648 AMAQI
18th Sep 2026689 AMAQI
18th Sep 20267410 AMAQI
18th Sep 20267311 AMAQI
18th Sep 20266412 PMAQI
18th Sep 2026661 PMAQI
18th Sep 2026602 PMAQI
18th Sep 2026703 PMAQI
18th Sep 2026284 PMAQI
18th Sep 2026295 PMAQI
18th Sep 2026366 PMAQI
18th Sep 2026487 PMAQI
18th Sep 2026778 PMAQI
18th Sep 2026439 PMAQI
18th Sep 20262910 PMAQI
18th Sep 20262411 PMAQI
19th Sep 20263212 AMAQI
19th Sep 2026231 AMAQI
19th Sep 2026212 AMAQI
19th Sep 2026223 AMAQI
19th Sep 2026214 AMAQI

24°C22/27°C

19th Sep 2026395 AMAQI
19th Sep 2026266 AMAQI
19th Sep 2026587 AMAQI
19th Sep 2026328 AMAQI
19th Sep 2026269 AMAQI
19th Sep 20262510 AMAQI
19th Sep 20263811 AMAQI
19th Sep 20263812 PMAQI
19th Sep 2026371 PMAQI
19th Sep 2026282 PMAQI
19th Sep 2026293 PMAQI
19th Sep 2026634 PMAQI
19th Sep 2026575 PMAQI
19th Sep 2026786 PMAQI
19th Sep 2026387 PMAQI
19th Sep 2026448 PMAQI
19th Sep 2026509 PMAQI
19th Sep 20265610 PMAQI
19th Sep 20265311 PMAQI
20th Sep 20264912 AMAQI
20th Sep 2026441 AMAQI
20th Sep 2026422 AMAQI
20th Sep 2026413 AMAQI
20th Sep 2026304 AMAQI

26°C23/31°C

20th Sep 2026345 AMAQI
20th Sep 2026426 AMAQI
20th Sep 2026447 AMAQI
20th Sep 2026508 AMAQI
20th Sep 2026439 AMAQI
20th Sep 20262710 AMAQI
20th Sep 20262211 AMAQI
20th Sep 20262612 PMAQI
20th Sep 2026181 PMAQI
20th Sep 2026172 PMAQI
20th Sep 2026173 PMAQI
20th Sep 2026164 PMAQI
20th Sep 2026185 PMAQI
20th Sep 2026196 PMAQI
20th Sep 2026267 PMAQI
20th Sep 2026358 PMAQI
20th Sep 2026469 PMAQI
20th Sep 20264210 PMAQI
20th Sep 20264011 PMAQI
21st Sep 20262212 AMAQI
21st Sep 2026221 AMAQI
21st Sep 2026222 AMAQI
21st Sep 2026183 AMAQI
21st Sep 2026204 AMAQI

27°C23/31°C

21st Sep 2026225 AMAQI
21st Sep 2026286 AMAQI
21st Sep 2026307 AMAQI
21st Sep 2026298 AMAQI
21st Sep 2026369 AMAQI
21st Sep 20262210 AMAQI
21st Sep 20262111 AMAQI
21st Sep 20262612 PMAQI
21st Sep 2026361 PMAQI
21st Sep 2026362 PMAQI
21st Sep 2026363 PMAQI
21st Sep 2026444 PMAQI
21st Sep 2026375 PMAQI
21st Sep 2026426 PMAQI
21st Sep 2026657 PMAQI
21st Sep 2026548 PMAQI
21st Sep 2026699 PMAQI
21st Sep 20267310 PMAQI
21st Sep 20268311 PMAQI
22nd Sep 20267212 AMAQI
22nd Sep 2026651 AMAQI
22nd Sep 2026652 AMAQI
22nd Sep 2026613 AMAQI
22nd Sep 2026634 AMAQI

27°C24/31°C

22nd Sep 2026675 AMAQI
22nd Sep 2026656 AMAQI
22nd Sep 2026657 AMAQI
22nd Sep 2026668 AMAQI
22nd Sep 2026629 AMAQI
22nd Sep 20265610 AMAQI
22nd Sep 20265011 AMAQI
22nd Sep 20264612 PMAQI
22nd Sep 2026461 PMAQI
22nd Sep 2026382 PMAQI
22nd Sep 2026413 PMAQI
22nd Sep 2026424 PMAQI
22nd Sep 2026425 PMAQI
22nd Sep 2026406 PMAQI
22nd Sep 2026467 PMAQI
22nd Sep 2026668 PMAQI
22nd Sep 2026799 PMAQI
22nd Sep 20267410 PMAQI
22nd Sep 20266911 PMAQI
23rd Sep 20267212 AMAQI
23rd Sep 2026711 AMAQI
23rd Sep 2026842 AMAQI
23rd Sep 2026663 AMAQI
23rd Sep 2026614 AMAQI

27°C23/31°C

23rd Sep 2026565 AMAQI
23rd Sep 2026686 AMAQI
23rd Sep 2026747 AMAQI
23rd Sep 2026598 AMAQI
23rd Sep 2026599 AMAQI
23rd Sep 20266010 AMAQI
23rd Sep 20266311 AMAQI
23rd Sep 20266012 PMAQI
23rd Sep 2026571 PMAQI
23rd Sep 2026572 PMAQI
23rd Sep 2026563 PMAQI
23rd Sep 2026564 PMAQI
23rd Sep 2026565 PMAQI
23rd Sep 2026566 PMAQI
23rd Sep 2026587 PMAQI
23rd Sep 2026798 PMAQI
23rd Sep 2026799 PMAQI
23rd Sep 20267410 PMAQI
23rd Sep 20266811 PMAQI
24th Sep 20266612 AMAQI
24th Sep 2026571 AMAQI
24th Sep 2026502 AMAQI
24th Sep 2026423 AMAQI
24th Sep 2026444 AMAQI

27°C23/31°C

24th Sep 2026465 AMAQI
24th Sep 2026436 AMAQI
24th Sep 2026387 AMAQI
24th Sep 2026478 AMAQI
24th Sep 2026649 AMAQI
24th Sep 20266610 AMAQI
24th Sep 20265611 AMAQI
24th Sep 20265612 PMAQI
24th Sep 2026531 PMAQI
24th Sep 2026492 PMAQI
24th Sep 2026413 PMAQI
24th Sep 2026404 PMAQI
24th Sep 2026385 PMAQI
24th Sep 2026386 PMAQI
24th Sep 2026387 PMAQI
24th Sep 2026498 PMAQI
24th Sep 2026499 PMAQI
24th Sep 20263610 PMAQI
24th Sep 20264111 PMAQI
25th Sep 20263812 AMAQI
25th Sep 2026321 AMAQI
25th Sep 2026312 AMAQI
25th Sep 2026293 AMAQI
25th Sep 2026324 AMAQI

26°C23/30°C

25th Sep 2026345 AMAQI
25th Sep 2026276 AMAQI
25th Sep 2026277 AMAQI
25th Sep 2026288 AMAQI
25th Sep 2026279 AMAQI
25th Sep 20262610 AMAQI
25th Sep 20262611 AMAQI
25th Sep 20262112 PMAQI
25th Sep 2026211 PMAQI
25th Sep 2026222 PMAQI
25th Sep 2026223 PMAQI
25th Sep 2026244 PMAQI
25th Sep 2026255 PMAQI
25th Sep 2026266 PMAQI
25th Sep 2026297 PMAQI
25th Sep 2026288 PMAQI
25th Sep 2026289 PMAQI
25th Sep 20262410 PMAQI
25th Sep 20262411 PMAQI
26th Sep 20261712 AMAQI
26th Sep 2026201 AMAQI
26th Sep 2026182 AMAQI
26th Sep 2026163 AMAQI
26th Sep 2026214 AMAQI

25°C23/29°C

26th Sep 2026205 AMAQI
26th Sep 2026196 AMAQI
26th Sep 2026257 AMAQI
26th Sep 2026278 AMAQI
26th Sep 2026299 AMAQI
26th Sep 20261410 AMAQI
26th Sep 20262211 AMAQI
26th Sep 20261512 PMAQI
26th Sep 2026151 PMAQI
26th Sep 2026182 PMAQI
26th Sep 2026163 PMAQI
26th Sep 2026164 PMAQI
26th Sep 2026155 PMAQI
26th Sep 2026186 PMAQI
26th Sep 2026227 PMAQI
26th Sep 2026208 PMAQI
26th Sep 2026189 PMAQI
26th Sep 20266810 PMAQI
26th Sep 20265511 PMAQI
27th Sep 20265712 AMAQI
27th Sep 2026551 AMAQI
27th Sep 2026482 AMAQI
27th Sep 2026343 AMAQI
27th Sep 2026404 AMAQI

25°C23/27°C

27th Sep 2026445 AMAQI
27th Sep 2026476 AMAQI
27th Sep 2026627 AMAQI
27th Sep 2026748 AMAQI
27th Sep 2026749 AMAQI
27th Sep 20267010 AMAQI
27th Sep 20266011 AMAQI
27th Sep 20265812 PMAQI
27th Sep 2026451 PMAQI
27th Sep 2026452 PMAQI
27th Sep 2026453 PMAQI
27th Sep 2026564 PMAQI
27th Sep 2026575 PMAQI
27th Sep 2026556 PMAQI
27th Sep 2026587 PMAQI
27th Sep 2026528 PMAQI
27th Sep 2026189 PMAQI
27th Sep 20265810 PMAQI
27th Sep 20264411 PMAQI
28th Sep 20265012 AMAQI
28th Sep 2026241 AMAQI
28th Sep 2026262 AMAQI
28th Sep 2026243 AMAQI
28th Sep 2026204 AMAQI

24°C22/28°C

28th Sep 2026265 AMAQI
28th Sep 2026266 AMAQI
28th Sep 2026267 AMAQI
28th Sep 2026228 AMAQI
28th Sep 2026209 AMAQI
28th Sep 20261710 AMAQI
28th Sep 20261811 AMAQI
28th Sep 20261812 PMAQI
28th Sep 2026291 PMAQI
28th Sep 2026382 PMAQI
28th Sep 2026573 PMAQI
28th Sep 2026514 PMAQI
28th Sep 2026435 PMAQI
28th Sep 2026436 PMAQI
28th Sep 2026567 PMAQI
28th Sep 2026568 PMAQI
28th Sep 2026209 PMAQI
28th Sep 20266010 PMAQI
28th Sep 20263611 PMAQI
29th Sep 20263912 AMAQI
29th Sep 2026301 AMAQI
29th Sep 2026362 AMAQI
29th Sep 2026413 AMAQI
29th Sep 2026444 AMAQI

23°C22/26°C

29th Sep 2026465 AMAQI
29th Sep 2026446 AMAQI
29th Sep 2026507 AMAQI
29th Sep 2026668 AMAQI
29th Sep 2026689 AMAQI
29th Sep 20267210 AMAQI
29th Sep 20267011 AMAQI
29th Sep 20266712 PMAQI
29th Sep 2026691 PMAQI
29th Sep 2026612 PMAQI
29th Sep 2026673 PMAQI
29th Sep 2026624 PMAQI
29th Sep 2026655 PMAQI
29th Sep 2026606 PMAQI
29th Sep 2026647 PMAQI
29th Sep 2026628 PMAQI
29th Sep 2026669 PMAQI
29th Sep 20266010 PMAQI
29th Sep 20265411 PMAQI
30th Sep 20265112 AMAQI
30th Sep 2026501 AMAQI
30th Sep 2026432 AMAQI
30th Sep 2026403 AMAQI
30th Sep 2026534 AMAQI

25°C22/29°C

30th Sep 2026545 AMAQI
5 AM
30th Sep 2026586 AMAQI
30th Sep 2026607 AMAQI
30th Sep 2026628 AMAQI
30th Sep 2026639 AMAQI
30th Sep 20266310 AMAQI
30th Sep 20265211 AMAQI
11 AM
30th Sep 20263812 PMAQI
30th Sep 2026271 PMAQI
30th Sep 2026252 PMAQI
30th Sep 2026283 PMAQI
30th Sep 2026294 PMAQI
30th Sep 2026395 PMAQI
30th Sep 2026476 PMAQI
6 PM
30th Sep 2026237 PMAQI
30th Sep 2026248 PMAQI
30th Sep 2026349 PMAQI
30th Sep 20264310 PMAQI
30th Sep 20266411 PMAQI
11 PM
4 AM

27°C23/31°C

Day time
Avg. Highest Time
8 AM - 9 AM

49AQI

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

40AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 9 AM (Avg. 49), while the lowest AQI was between 1 PM to 2 PM (Avg. 40).
Night time
Avg. Highest Time
10 PM

52AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
3 AM - 4 AM

39AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 PM to 10 PM (Avg. 52), while the lowest AQI was between 3 AM to 4 AM (Avg. 39).

2026 Days Vs Air Quality

Vientiane, Viangchan, Laos

2026

43%

116

36%

96

17%

46

4%

11

Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)

Good
116 Days
Moderate
96 Days
Poor
46 Days
Unhealthy
11 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 43%

Health Risk Level:

Significant

In 2026, 43% of 273 days were within WHO’s safe air quality limits, and 57% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Vientiane, Viangchan, Laos

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
103AQI (US)
2nd January 2026
68AQI (US)
3rd January 2026
45AQI (US)
4th January 2026
59AQI (US)
5th January 2026
111AQI (US)
6th January 2026
60AQI (US)
7th January 2026
51AQI (US)
8th January 2026
68AQI (US)
9th January 2026
96AQI (US)
10th January 2026
114AQI (US)
11th January 2026
106AQI (US)
12th January 2026
142AQI (US)
13th January 2026
124AQI (US)
14th January 2026
124AQI (US)
15th January 2026
140AQI (US)
16th January 2026
133AQI (US)
17th January 2026
131AQI (US)
18th January 2026
127AQI (US)
19th January 2026
115AQI (US)
20th January 2026
119AQI (US)
21st January 2026
100AQI (US)
22nd January 2026
71AQI (US)
23rd January 2026
51AQI (US)
24th January 2026
79AQI (US)
25th January 2026
100AQI (US)
26th January 2026
106AQI (US)
27th January 2026
88AQI (US)
28th January 2026
84AQI (US)
29th January 2026
97AQI (US)
30th January 2026
118AQI (US)
31st January 2026
108AQI (US)
1st February 2026
80AQI (US)
2nd February 2026
72AQI (US)
3rd February 2026
58AQI (US)
4th February 2026
79AQI (US)
5th February 2026
97AQI (US)
6th February 2026
98AQI (US)
7th February 2026
108AQI (US)
8th February 2026
74AQI (US)
9th February 2026
25AQI (US)
10th February 2026
66AQI (US)
11th February 2026
77AQI (US)
12th February 2026
75AQI (US)
13th February 2026
88AQI (US)
14th February 2026
90AQI (US)
15th February 2026
93AQI (US)
16th February 2026
107AQI (US)
17th February 2026
80AQI (US)
18th February 2026
50AQI (US)
19th February 2026
32AQI (US)
20th February 2026
39AQI (US)
21st February 2026
81AQI (US)
22nd February 2026
128AQI (US)
23rd February 2026
124AQI (US)
24th February 2026
108AQI (US)
25th February 2026
65AQI (US)
26th February 2026
61AQI (US)
27th February 2026
69AQI (US)
28th February 2026
65AQI (US)
1st March 2026
81AQI (US)
2nd March 2026
92AQI (US)
3rd March 2026
108AQI (US)
4th March 2026
88AQI (US)
5th March 2026
58AQI (US)
6th March 2026
52AQI (US)
7th March 2026
50AQI (US)
8th March 2026
53AQI (US)
9th March 2026
75AQI (US)
10th March 2026
38AQI (US)
11th March 2026
88AQI (US)
12th March 2026
72AQI (US)
13th March 2026
96AQI (US)
14th March 2026
74AQI (US)
15th March 2026
62AQI (US)
16th March 2026
73AQI (US)
17th March 2026
84AQI (US)
18th March 2026
112AQI (US)
19th March 2026
115AQI (US)
20th March 2026
114AQI (US)
21st March 2026
107AQI (US)
22nd March 2026
115AQI (US)
23rd March 2026
104AQI (US)
24th March 2026
120AQI (US)
25th March 2026
112AQI (US)
26th March 2026
109AQI (US)
27th March 2026
143AQI (US)
28th March 2026
139AQI (US)
29th March 2026
117AQI (US)
30th March 2026
135AQI (US)
31st March 2026
144AQI (US)
1st April 2026
160AQI (US)
2nd April 2026
159AQI (US)
3rd April 2026
157AQI (US)
4th April 2026
160AQI (US)
5th April 2026
165AQI (US)
6th April 2026
164AQI (US)
7th April 2026
161AQI (US)
8th April 2026
154AQI (US)
9th April 2026
151AQI (US)
10th April 2026
147AQI (US)
11th April 2026
143AQI (US)
12th April 2026
148AQI (US)
13th April 2026
156AQI (US)
14th April 2026
152AQI (US)
15th April 2026
149AQI (US)
16th April 2026
150AQI (US)
17th April 2026
18th April 2026
133AQI (US)
19th April 2026
121AQI (US)
20th April 2026
104AQI (US)
21st April 2026
127AQI (US)
22nd April 2026
23rd April 2026
135AQI (US)
24th April 2026
83AQI (US)
25th April 2026
67AQI (US)
26th April 2026
75AQI (US)
27th April 2026
92AQI (US)
28th April 2026
88AQI (US)
29th April 2026
76AQI (US)
30th April 2026
66AQI (US)
1st May 2026
76AQI (US)
2nd May 2026
55AQI (US)
3rd May 2026
85AQI (US)
4th May 2026
61AQI (US)
5th May 2026
56AQI (US)
6th May 2026
60AQI (US)
7th May 2026
86AQI (US)
8th May 2026
68AQI (US)
9th May 2026
10th May 2026
57AQI (US)
11th May 2026
77AQI (US)
12th May 2026
79AQI (US)
13th May 2026
57AQI (US)
14th May 2026
52AQI (US)
15th May 2026
39AQI (US)
16th May 2026
87AQI (US)
17th May 2026
83AQI (US)
18th May 2026
74AQI (US)
19th May 2026
59AQI (US)
20th May 2026
70AQI (US)
21st May 2026
75AQI (US)
22nd May 2026
63AQI (US)
23rd May 2026
47AQI (US)
24th May 2026
55AQI (US)
25th May 2026
56AQI (US)
26th May 2026
45AQI (US)
27th May 2026
38AQI (US)
28th May 2026
57AQI (US)
29th May 2026
41AQI (US)
30th May 2026
43AQI (US)
31st May 2026
48AQI (US)
1st June 2026
70AQI (US)
2nd June 2026
70AQI (US)
3rd June 2026
74AQI (US)
4th June 2026
63AQI (US)
5th June 2026
39AQI (US)
6th June 2026
32AQI (US)
7th June 2026
29AQI (US)
8th June 2026
28AQI (US)
9th June 2026
22AQI (US)
10th June 2026
32AQI (US)
11th June 2026
33AQI (US)
12th June 2026
34AQI (US)
13th June 2026
38AQI (US)
14th June 2026
36AQI (US)
15th June 2026
24AQI (US)
16th June 2026
32AQI (US)
17th June 2026
36AQI (US)
18th June 2026
38AQI (US)
19th June 2026
33AQI (US)
20th June 2026
32AQI (US)
21st June 2026
27AQI (US)
22nd June 2026
31AQI (US)
23rd June 2026
39AQI (US)
24th June 2026
41AQI (US)
25th June 2026
26AQI (US)
26th June 2026
34AQI (US)
27th June 2026
33AQI (US)
28th June 2026
33AQI (US)
29th June 2026
35AQI (US)
30th June 2026
30AQI (US)
1st July 2026
29AQI (US)
2nd July 2026
28AQI (US)
3rd July 2026
32AQI (US)
4th July 2026
32AQI (US)
5th July 2026
32AQI (US)
6th July 2026
26AQI (US)
7th July 2026
34AQI (US)
8th July 2026
32AQI (US)
9th July 2026
36AQI (US)
10th July 2026
36AQI (US)
11th July 2026
40AQI (US)
12th July 2026
43AQI (US)
13th July 2026
33AQI (US)
14th July 2026
45AQI (US)
15th July 2026
34AQI (US)
16th July 2026
43AQI (US)
17th July 2026
43AQI (US)
18th July 2026
46AQI (US)
19th July 2026
56AQI (US)
20th July 2026
56AQI (US)
21st July 2026
42AQI (US)
22nd July 2026
26AQI (US)
23rd July 2026
34AQI (US)
24th July 2026
29AQI (US)
25th July 2026
28AQI (US)
26th July 2026
40AQI (US)
27th July 2026
44AQI (US)
28th July 2026
34AQI (US)
29th July 2026
30AQI (US)
30th July 2026
44AQI (US)
31st July 2026
33AQI (US)
1st August 2026
38AQI (US)
2nd August 2026
34AQI (US)
3rd August 2026
34AQI (US)
4th August 2026
42AQI (US)
5th August 2026
44AQI (US)
6th August 2026
38AQI (US)
7th August 2026
42AQI (US)
8th August 2026
38AQI (US)
9th August 2026
33AQI (US)
10th August 2026
36AQI (US)
11th August 2026
49AQI (US)
12th August 2026
44AQI (US)
13th August 2026
45AQI (US)
14th August 2026
46AQI (US)
15th August 2026
44AQI (US)
16th August 2026
44AQI (US)
17th August 2026
42AQI (US)
18th August 2026
42AQI (US)
19th August 2026
34AQI (US)
20th August 2026
27AQI (US)
21st August 2026
49AQI (US)
22nd August 2026
45AQI (US)
23rd August 2026
44AQI (US)
24th August 2026
44AQI (US)
25th August 2026
52AQI (US)
26th August 2026
35AQI (US)
27th August 2026
42AQI (US)
28th August 2026
36AQI (US)
29th August 2026
49AQI (US)
30th August 2026
40AQI (US)
31st August 2026
36AQI (US)
1st September 2026
31AQI (US)
2nd September 2026
36AQI (US)
3rd September 2026
45AQI (US)
4th September 2026
54AQI (US)
5th September 2026
52AQI (US)
6th September 2026
36AQI (US)
7th September 2026
23AQI (US)
8th September 2026
46AQI (US)
9th September 2026
47AQI (US)
10th September 2026
41AQI (US)
11th September 2026
55AQI (US)
12th September 2026
64AQI (US)
13th September 2026
66AQI (US)
14th September 2026
51AQI (US)
15th September 2026
26AQI (US)
16th September 2026
33AQI (US)
17th September 2026
52AQI (US)
18th September 2026
52AQI (US)
19th September 2026
39AQI (US)
20th September 2026
33AQI (US)
21st September 2026
38AQI (US)
22nd September 2026
58AQI (US)
23rd September 2026
64AQI (US)
24th September 2026
48AQI (US)
25th September 2026
27AQI (US)
26th September 2026
22AQI (US)
27th September 2026
52AQI (US)
28th September 2026
34AQI (US)
29th September 2026
57AQI (US)
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

98AQI (US)

78AQI (US)

95AQI (US)

130AQI (US)

62AQI (US)

37AQI (US)

37AQI (US)

41AQI (US)

44AQI (US)

No. of days

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

202669AQI (US)

1
14
16
4
19
5
2
14
15
7
10
11
7
23
26
4
29
2
30
1
17
12
116
96
46
11

Highest AQI (US) recorded in

April

130AQI (US)

Lowest AQI (US) recorded in

July

37AQI (US)

202574AQI (US)

10
21
21
7
14
10
7
24
6
13
18
22
8
25
6
16
15
26
4
4
27
6
19
5
1
13
17
113
179
66
7

Highest AQI (US) recorded in

January

110AQI (US)

Lowest AQI (US) recorded in

September

43AQI (US)

202476AQI (US)

16
15
2
21
6
1
9
3
22
8
7
24
7
23
14
17
24
7
4
5
17
1
27
3
2
26
3
64
190
54
6

Highest AQI (US) recorded in

February

135AQI (US)

Lowest AQI (US) recorded in

September

39AQI (US)

2023108AQI (US)

5
18
7
1
9
16
3
3
20
8
1
9
15
4
1
12
19
7
23
14
16
1
31
15
15
4
18
9
9
20
8
22
1
40
138
110
59
16
1

Highest AQI (US) recorded in

March

186AQI (US)

Lowest AQI (US) recorded in

September

52AQI (US)

2022123AQI (US)

3
1
7
22
1
1
4
18
8
1
11
43
10

Highest AQI (US) recorded in

October

133AQI (US)

Lowest AQI (US) recorded in

November

113AQI (US)

202055AQI (US)

1
1

Highest AQI (US) recorded in

October

55AQI (US)

Lowest AQI (US) recorded in

October

55AQI (US)

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2022(Avg.)
123AQI (US)
Least Polluted Year Recorded
2020(Avg.)
55AQI (US)

Vientiane's annual 2026 AQI (US) (69) shows an average percentage change of -14.1% (improved AQI (US)) compared to previous years: 2020 (55), 2022 (123), 2023 (108), 2024 (76), 2025 (74).