Son Tay, Ha Noi, Vietnam 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
Son Tay, Ha Noi, Vietnam
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Oct 2024
161AQILowest AQI recorded on
28th Oct 2024
23AQISame Day Analysis (3rd October ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 72 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Son Tay, Ha Noi, Vietnam
AQI
Day
Night
.
5 AM4th Oct 2025
5 PM
4 AM5th Oct 2025
Day time
Avg. Highest Time
10AM4th Oct
123AQI
Avg. Lowest Time
5AM4th Oct
87AQI
Night time
Avg. Highest Time
4AM5th Oct
123AQI
Avg. Lowest Time
1AM5th Oct
98AQI
In the last 24 hours,
Son Tay's AQI reached its highest point of 123 at 10 AM during the Day, while the lowest point, 87, was recorded at 5 AM during the Day between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Son Tay, Ha Noi, Vietnam
SepOct
05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
5th Sep 2025445 AMAQI
5th Sep 2025446 AMAQI
5th Sep 2025427 AMAQI
5th Sep 2025438 AMAQI
5th Sep 2025309 AMAQI
5th Sep 20254110 AMAQI
5th Sep 20253011 AMAQI
5th Sep 20253612 PMAQI
5th Sep 2025301 PMAQI
5th Sep 2025402 PMAQI
5th Sep 2025313 PMAQI
5th Sep 2025274 PMAQI
5th Sep 2025295 PMAQI
5th Sep 2025366 PMAQI
5th Sep 2025487 PMAQI
5th Sep 2025468 PMAQI
5th Sep 2025489 PMAQI
5th Sep 20254510 PMAQI
5th Sep 20254611 PMAQI
6th Sep 20254412 AMAQI
6th Sep 2025441 AMAQI
6th Sep 2025452 AMAQI
6th Sep 2025443 AMAQI
6th Sep 2025444 AMAQI
29°C25/33°C
6th Sep 2025455 AMAQI
6th Sep 2025426 AMAQI
6th Sep 2025187 AMAQI
6th Sep 2025328 AMAQI
6th Sep 2025269 AMAQI
6th Sep 20254410 AMAQI
6th Sep 20254011 AMAQI
6th Sep 20253012 PMAQI
6th Sep 2025361 PMAQI
6th Sep 2025402 PMAQI
6th Sep 2025293 PMAQI
6th Sep 2025314 PMAQI
6th Sep 2025285 PMAQI
6th Sep 2025346 PMAQI
6th Sep 2025437 PMAQI
6th Sep 2025488 PMAQI
6th Sep 2025479 PMAQI
6th Sep 20254110 PMAQI
6th Sep 20254111 PMAQI
7th Sep 20254212 AMAQI
7th Sep 2025451 AMAQI
7th Sep 2025442 AMAQI
7th Sep 2025433 AMAQI
7th Sep 2025424 AMAQI
29°C24/33°C
7th Sep 2025445 AMAQI
7th Sep 2025446 AMAQI
7th Sep 2025337 AMAQI
7th Sep 2025548 AMAQI
7th Sep 2025579 AMAQI
7th Sep 20255710 AMAQI
7th Sep 20254811 AMAQI
7th Sep 20255512 PMAQI
7th Sep 2025571 PMAQI
7th Sep 2025542 PMAQI
7th Sep 2025533 PMAQI
7th Sep 2025484 PMAQI
7th Sep 2025495 PMAQI
7th Sep 2025466 PMAQI
7th Sep 2025507 PMAQI
7th Sep 2025558 PMAQI
7th Sep 2025599 PMAQI
7th Sep 20256010 PMAQI
7th Sep 20256211 PMAQI
8th Sep 20255712 AMAQI
8th Sep 2025611 AMAQI
8th Sep 2025542 AMAQI
8th Sep 2025493 AMAQI
8th Sep 2025474 AMAQI
29°C25/34°C
8th Sep 2025445 AMAQI
8th Sep 2025476 AMAQI
8th Sep 2025607 AMAQI
8th Sep 2025658 AMAQI
8th Sep 2025629 AMAQI
8th Sep 20256510 AMAQI
8th Sep 20256011 AMAQI
8th Sep 20256412 PMAQI
8th Sep 2025591 PMAQI
8th Sep 2025512 PMAQI
8th Sep 2025493 PMAQI
8th Sep 2025504 PMAQI
8th Sep 2025535 PMAQI
8th Sep 2025506 PMAQI
8th Sep 2025537 PMAQI
8th Sep 2025588 PMAQI
8th Sep 2025609 PMAQI
8th Sep 20255810 PMAQI
8th Sep 20256511 PMAQI
9th Sep 20255812 AMAQI
9th Sep 2025531 AMAQI
9th Sep 2025532 AMAQI
9th Sep 2025533 AMAQI
9th Sep 2025524 AMAQI
30°C25/35°C
9th Sep 2025545 AMAQI
9th Sep 2025546 AMAQI
9th Sep 2025507 AMAQI
9th Sep 2025528 AMAQI
9th Sep 2025569 AMAQI
9th Sep 20254810 AMAQI
9th Sep 20253911 AMAQI
9th Sep 20253912 PMAQI
9th Sep 2025331 PMAQI
9th Sep 2025372 PMAQI
9th Sep 2025323 PMAQI
9th Sep 2025344 PMAQI
9th Sep 2025365 PMAQI
9th Sep 2025406 PMAQI
9th Sep 2025467 PMAQI
9th Sep 2025448 PMAQI
9th Sep 2025539 PMAQI
9th Sep 20255010 PMAQI
9th Sep 20255411 PMAQI
10th Sep 20255312 AMAQI
10th Sep 2025531 AMAQI
10th Sep 2025522 AMAQI
10th Sep 2025523 AMAQI
10th Sep 2025524 AMAQI
27°C25/31°C
10th Sep 2025525 AMAQI
10th Sep 2025526 AMAQI
10th Sep 2025477 AMAQI
10th Sep 2025418 AMAQI
10th Sep 2025509 AMAQI
10th Sep 20254710 AMAQI
10th Sep 20254411 AMAQI
10th Sep 20254812 PMAQI
10th Sep 2025431 PMAQI
10th Sep 2025542 PMAQI
10th Sep 2025513 PMAQI
10th Sep 2025494 PMAQI
10th Sep 2025525 PMAQI
10th Sep 2025566 PMAQI
10th Sep 2025467 PMAQI
10th Sep 2025558 PMAQI
10th Sep 2025559 PMAQI
10th Sep 20254610 PMAQI
10th Sep 20254511 PMAQI
11th Sep 20255212 AMAQI
11th Sep 2025501 AMAQI
11th Sep 2025502 AMAQI
11th Sep 2025503 AMAQI
11th Sep 2025524 AMAQI
26°C24/30°C
11th Sep 2025525 AMAQI
11th Sep 2025526 AMAQI
11th Sep 2025317 AMAQI
11th Sep 2025348 AMAQI
11th Sep 2025459 AMAQI
11th Sep 20253810 AMAQI
11th Sep 20255011 AMAQI
11th Sep 20254212 PMAQI
11th Sep 2025321 PMAQI
11th Sep 2025432 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025424 PMAQI
11th Sep 2025405 PMAQI
11th Sep 2025446 PMAQI
11th Sep 2025517 PMAQI
11th Sep 2025458 PMAQI
11th Sep 2025499 PMAQI
11th Sep 20254910 PMAQI
11th Sep 20254611 PMAQI
12th Sep 20255112 AMAQI
12th Sep 2025521 AMAQI
12th Sep 2025492 AMAQI
12th Sep 2025483 AMAQI
12th Sep 2025504 AMAQI
28°C24/32°C
12th Sep 2025515 AMAQI
12th Sep 2025526 AMAQI
12th Sep 2025317 AMAQI
12th Sep 2025308 AMAQI
12th Sep 2025269 AMAQI
12th Sep 20253410 AMAQI
12th Sep 20252611 AMAQI
12th Sep 20253412 PMAQI
12th Sep 2025321 PMAQI
12th Sep 2025302 PMAQI
12th Sep 2025283 PMAQI
12th Sep 2025304 PMAQI
12th Sep 2025355 PMAQI
12th Sep 2025446 PMAQI
12th Sep 2025427 PMAQI
12th Sep 2025458 PMAQI
12th Sep 2025409 PMAQI
12th Sep 20254510 PMAQI
12th Sep 20254911 PMAQI
13th Sep 20255012 AMAQI
13th Sep 2025501 AMAQI
13th Sep 2025492 AMAQI
13th Sep 2025493 AMAQI
13th Sep 2025484 AMAQI
27°C24/32°C
13th Sep 2025475 AMAQI
13th Sep 2025486 AMAQI
13th Sep 2025317 AMAQI
13th Sep 2025378 AMAQI
13th Sep 2025329 AMAQI
13th Sep 20254410 AMAQI
13th Sep 20253111 AMAQI
13th Sep 20252812 PMAQI
13th Sep 2025311 PMAQI
13th Sep 2025362 PMAQI
13th Sep 2025223 PMAQI
13th Sep 2025254 PMAQI
13th Sep 2025205 PMAQI
13th Sep 2025406 PMAQI
13th Sep 2025397 PMAQI
13th Sep 2025448 PMAQI
13th Sep 2025439 PMAQI
13th Sep 20253610 PMAQI
13th Sep 20253911 PMAQI
14th Sep 20255012 AMAQI
14th Sep 2025481 AMAQI
14th Sep 2025452 AMAQI
14th Sep 2025433 AMAQI
14th Sep 2025434 AMAQI
28°C24/32°C
14th Sep 2025445 AMAQI
14th Sep 2025446 AMAQI
14th Sep 2025327 AMAQI
14th Sep 2025348 AMAQI
14th Sep 2025339 AMAQI
14th Sep 20253210 AMAQI
14th Sep 20253411 AMAQI
14th Sep 20253812 PMAQI
14th Sep 2025401 PMAQI
14th Sep 2025332 PMAQI
14th Sep 2025373 PMAQI
14th Sep 2025344 PMAQI
14th Sep 2025295 PMAQI
14th Sep 2025366 PMAQI
14th Sep 2025427 PMAQI
14th Sep 2025518 PMAQI
14th Sep 2025539 PMAQI
14th Sep 20255210 PMAQI
14th Sep 20255011 PMAQI
15th Sep 20255412 AMAQI
15th Sep 2025491 AMAQI
15th Sep 2025462 AMAQI
15th Sep 2025423 AMAQI
15th Sep 2025444 AMAQI
28°C24/32°C
15th Sep 2025435 AMAQI
15th Sep 2025436 AMAQI
15th Sep 2025327 AMAQI
15th Sep 2025358 AMAQI
15th Sep 2025409 AMAQI
15th Sep 20254310 AMAQI
15th Sep 20254411 AMAQI
15th Sep 20253912 PMAQI
15th Sep 2025311 PMAQI
15th Sep 2025452 PMAQI
15th Sep 2025363 PMAQI
15th Sep 2025424 PMAQI
15th Sep 2025445 PMAQI
15th Sep 2025486 PMAQI
15th Sep 2025447 PMAQI
15th Sep 2025428 PMAQI
15th Sep 2025429 PMAQI
15th Sep 20254810 PMAQI
15th Sep 20254411 PMAQI
16th Sep 20254712 AMAQI
16th Sep 2025461 AMAQI
16th Sep 2025452 AMAQI
16th Sep 2025413 AMAQI
16th Sep 2025434 AMAQI
27°C24/31°C
16th Sep 2025435 AMAQI
16th Sep 2025446 AMAQI
16th Sep 2025487 AMAQI
16th Sep 2025548 AMAQI
16th Sep 2025589 AMAQI
16th Sep 20254610 AMAQI
16th Sep 20255211 AMAQI
16th Sep 20254412 PMAQI
16th Sep 2025381 PMAQI
16th Sep 2025402 PMAQI
16th Sep 2025373 PMAQI
16th Sep 2025514 PMAQI
16th Sep 2025485 PMAQI
16th Sep 2025486 PMAQI
16th Sep 2025447 PMAQI
16th Sep 2025538 PMAQI
16th Sep 2025549 PMAQI
16th Sep 20255410 PMAQI
16th Sep 20255411 PMAQI
17th Sep 20255212 AMAQI
17th Sep 2025461 AMAQI
17th Sep 2025462 AMAQI
17th Sep 2025443 AMAQI
17th Sep 2025474 AMAQI
28°C24/33°C
17th Sep 2025475 AMAQI
17th Sep 2025486 AMAQI
17th Sep 2025567 AMAQI
17th Sep 2025598 AMAQI
17th Sep 2025559 AMAQI
17th Sep 20255710 AMAQI
17th Sep 20255311 AMAQI
17th Sep 20254012 PMAQI
17th Sep 2025421 PMAQI
17th Sep 2025522 PMAQI
17th Sep 2025423 PMAQI
17th Sep 2025384 PMAQI
17th Sep 2025405 PMAQI
17th Sep 2025426 PMAQI
17th Sep 2025407 PMAQI
17th Sep 2025498 PMAQI
17th Sep 2025559 PMAQI
17th Sep 20255610 PMAQI
17th Sep 20255611 PMAQI
18th Sep 20255412 AMAQI
18th Sep 2025471 AMAQI
18th Sep 2025462 AMAQI
18th Sep 2025473 AMAQI
18th Sep 2025464 AMAQI
27°C24/31°C
18th Sep 2025485 AMAQI
18th Sep 2025526 AMAQI
18th Sep 2025567 AMAQI
18th Sep 2025618 AMAQI
18th Sep 2025649 AMAQI
18th Sep 20256010 AMAQI
18th Sep 20254611 AMAQI
18th Sep 20254212 PMAQI
18th Sep 2025431 PMAQI
18th Sep 2025442 PMAQI
18th Sep 2025383 PMAQI
18th Sep 2025304 PMAQI
18th Sep 2025305 PMAQI
18th Sep 2025436 PMAQI
18th Sep 2025537 PMAQI
18th Sep 2025538 PMAQI
18th Sep 2025549 PMAQI
18th Sep 20255610 PMAQI
18th Sep 20255611 PMAQI
19th Sep 20255412 AMAQI
19th Sep 2025491 AMAQI
19th Sep 2025502 AMAQI
19th Sep 2025513 AMAQI
19th Sep 2025524 AMAQI
27°C24/30°C
19th Sep 2025525 AMAQI
19th Sep 2025536 AMAQI
19th Sep 2025647 AMAQI
19th Sep 2025628 AMAQI
19th Sep 2025629 AMAQI
19th Sep 20255910 AMAQI
19th Sep 20255711 AMAQI
19th Sep 20255512 PMAQI
19th Sep 2025491 PMAQI
19th Sep 2025442 PMAQI
19th Sep 2025383 PMAQI
19th Sep 2025384 PMAQI
19th Sep 2025405 PMAQI
19th Sep 2025516 PMAQI
19th Sep 2025527 PMAQI
19th Sep 2025548 PMAQI
19th Sep 2025569 PMAQI
19th Sep 20256010 PMAQI
19th Sep 20255611 PMAQI
20th Sep 20255412 AMAQI
20th Sep 2025521 AMAQI
20th Sep 2025532 AMAQI
20th Sep 2025523 AMAQI
20th Sep 2025524 AMAQI
28°C24/33°C
20th Sep 2025535 AMAQI
20th Sep 2025556 AMAQI
20th Sep 2025667 AMAQI
20th Sep 2025648 AMAQI
20th Sep 2025689 AMAQI
20th Sep 20258010 AMAQI
20th Sep 20256711 AMAQI
20th Sep 20256212 PMAQI
20th Sep 2025601 PMAQI
20th Sep 2025562 PMAQI
20th Sep 2025533 PMAQI
20th Sep 2025564 PMAQI
20th Sep 2025545 PMAQI
20th Sep 2025586 PMAQI
20th Sep 2025607 PMAQI
20th Sep 2025698 PMAQI
20th Sep 2025779 PMAQI
20th Sep 20258110 PMAQI
20th Sep 20257011 PMAQI
21st Sep 20256612 AMAQI
21st Sep 2025571 AMAQI
21st Sep 2025552 AMAQI
21st Sep 2025593 AMAQI
21st Sep 2025594 AMAQI
29°C24/34°C
21st Sep 2025625 AMAQI
21st Sep 2025616 AMAQI
21st Sep 2025747 AMAQI
21st Sep 2025848 AMAQI
21st Sep 2025789 AMAQI
21st Sep 20257910 AMAQI
21st Sep 20256611 AMAQI
21st Sep 20256912 PMAQI
21st Sep 2025641 PMAQI
21st Sep 2025722 PMAQI
21st Sep 2025603 PMAQI
21st Sep 2025584 PMAQI
21st Sep 2025595 PMAQI
21st Sep 2025666 PMAQI
21st Sep 2025707 PMAQI
21st Sep 2025658 PMAQI
21st Sep 2025679 PMAQI
21st Sep 20256610 PMAQI
21st Sep 20256311 PMAQI
22nd Sep 20256012 AMAQI
22nd Sep 2025561 AMAQI
22nd Sep 2025582 AMAQI
22nd Sep 2025583 AMAQI
22nd Sep 2025604 AMAQI
29°C25/35°C
22nd Sep 2025615 AMAQI
22nd Sep 2025666 AMAQI
22nd Sep 2025567 AMAQI
22nd Sep 2025578 AMAQI
22nd Sep 2025559 AMAQI
22nd Sep 20255410 AMAQI
22nd Sep 20254911 AMAQI
22nd Sep 20254912 PMAQI
22nd Sep 2025521 PMAQI
22nd Sep 2025582 PMAQI
22nd Sep 2025683 PMAQI
22nd Sep 2025594 PMAQI
22nd Sep 2025575 PMAQI
22nd Sep 2025586 PMAQI
22nd Sep 2025597 PMAQI
22nd Sep 2025598 PMAQI
22nd Sep 2025589 PMAQI
22nd Sep 20255910 PMAQI
22nd Sep 20256111 PMAQI
23rd Sep 20256112 AMAQI
23rd Sep 2025581 AMAQI
23rd Sep 2025562 AMAQI
23rd Sep 2025563 AMAQI
23rd Sep 2025564 AMAQI
28°C25/32°C
23rd Sep 2025575 AMAQI
23rd Sep 2025606 AMAQI
23rd Sep 2025597 AMAQI
23rd Sep 2025588 AMAQI
23rd Sep 2025609 AMAQI
23rd Sep 20256110 AMAQI
23rd Sep 20256011 AMAQI
23rd Sep 20255512 PMAQI
23rd Sep 2025591 PMAQI
23rd Sep 2025572 PMAQI
23rd Sep 2025483 PMAQI
23rd Sep 2025544 PMAQI
23rd Sep 2025545 PMAQI
23rd Sep 2025566 PMAQI
23rd Sep 2025767 PMAQI
23rd Sep 2025718 PMAQI
23rd Sep 2025649 PMAQI
23rd Sep 20256310 PMAQI
23rd Sep 20256711 PMAQI
24th Sep 20256012 AMAQI
24th Sep 2025561 AMAQI
24th Sep 2025542 AMAQI
24th Sep 2025533 AMAQI
24th Sep 2025524 AMAQI
27°C24/32°C
24th Sep 2025545 AMAQI
24th Sep 2025596 AMAQI
24th Sep 2025567 AMAQI
24th Sep 2025518 AMAQI
24th Sep 2025519 AMAQI
24th Sep 20255410 AMAQI
24th Sep 20255311 AMAQI
24th Sep 20255112 PMAQI
24th Sep 2025481 PMAQI
24th Sep 2025462 PMAQI
24th Sep 2025313 PMAQI
24th Sep 2025364 PMAQI
24th Sep 2025535 PMAQI
24th Sep 2025516 PMAQI
24th Sep 2025547 PMAQI
24th Sep 2025558 PMAQI
24th Sep 2025599 PMAQI
24th Sep 20256510 PMAQI
24th Sep 20255511 PMAQI
25th Sep 20256112 AMAQI
25th Sep 2025521 AMAQI
25th Sep 2025542 AMAQI
25th Sep 2025523 AMAQI
25th Sep 2025534 AMAQI
28°C23/34°C
25th Sep 2025545 AMAQI
25th Sep 2025586 AMAQI
25th Sep 2025527 AMAQI
25th Sep 2025528 AMAQI
25th Sep 2025479 AMAQI
25th Sep 20254810 AMAQI
25th Sep 20254611 AMAQI
25th Sep 20255512 PMAQI
25th Sep 2025571 PMAQI
25th Sep 2025552 PMAQI
25th Sep 2025523 PMAQI
25th Sep 2025524 PMAQI
25th Sep 2025535 PMAQI
25th Sep 2025506 PMAQI
25th Sep 2025557 PMAQI
25th Sep 2025518 PMAQI
25th Sep 2025459 PMAQI
25th Sep 20254210 PMAQI
25th Sep 20254711 PMAQI
26th Sep 20255112 AMAQI
26th Sep 2025501 AMAQI
26th Sep 2025522 AMAQI
26th Sep 2025553 AMAQI
26th Sep 2025574 AMAQI
24°C23/24°C
26th Sep 2025575 AMAQI
26th Sep 2025576 AMAQI
26th Sep 2025597 AMAQI
26th Sep 2025598 AMAQI
26th Sep 2025629 AMAQI
26th Sep 20256410 AMAQI
26th Sep 20256611 AMAQI
26th Sep 20256812 PMAQI
26th Sep 2025681 PMAQI
26th Sep 2025702 PMAQI
26th Sep 2025683 PMAQI
26th Sep 2025684 PMAQI
26th Sep 2025685 PMAQI
26th Sep 2025686 PMAQI
26th Sep 2025677 PMAQI
26th Sep 2025668 PMAQI
26th Sep 2025659 PMAQI
26th Sep 20256710 PMAQI
26th Sep 20257111 PMAQI
27th Sep 20256612 AMAQI
27th Sep 2025601 AMAQI
27th Sep 2025562 AMAQI
27th Sep 2025523 AMAQI
27th Sep 2025534 AMAQI
24°C23/28°C
27th Sep 2025545 AMAQI
27th Sep 2025566 AMAQI
27th Sep 2025547 AMAQI
27th Sep 2025518 AMAQI
27th Sep 2025539 AMAQI
27th Sep 20255410 AMAQI
27th Sep 20255411 AMAQI
27th Sep 20255412 PMAQI
27th Sep 2025461 PMAQI
27th Sep 2025382 PMAQI
27th Sep 2025373 PMAQI
27th Sep 2025304 PMAQI
27th Sep 2025325 PMAQI
27th Sep 2025356 PMAQI
27th Sep 2025387 PMAQI
27th Sep 2025428 PMAQI
27th Sep 2025549 PMAQI
27th Sep 20255510 PMAQI
27th Sep 20256211 PMAQI
28th Sep 20256312 AMAQI
28th Sep 2025621 AMAQI
28th Sep 2025652 AMAQI
28th Sep 2025653 AMAQI
28th Sep 2025594 AMAQI
26°C23/30°C
28th Sep 2025565 AMAQI
28th Sep 2025566 AMAQI
28th Sep 2025577 AMAQI
28th Sep 2025578 AMAQI
28th Sep 2025579 AMAQI
28th Sep 20255710 AMAQI
28th Sep 20255711 AMAQI
28th Sep 20255512 PMAQI
28th Sep 2025551 PMAQI
28th Sep 2025532 PMAQI
28th Sep 2025473 PMAQI
28th Sep 2025434 PMAQI
28th Sep 2025515 PMAQI
28th Sep 2025466 PMAQI
28th Sep 2025397 PMAQI
28th Sep 2025378 PMAQI
28th Sep 2025359 PMAQI
28th Sep 20254110 PMAQI
28th Sep 20254311 PMAQI
29th Sep 20254812 AMAQI
29th Sep 2025581 AMAQI
29th Sep 2025582 AMAQI
29th Sep 2025583 AMAQI
29th Sep 2025574 AMAQI
25°C23/31°C
29th Sep 2025565 AMAQI
29th Sep 2025556 AMAQI
29th Sep 2025537 AMAQI
29th Sep 2025538 AMAQI
29th Sep 2025539 AMAQI
29th Sep 20255210 AMAQI
29th Sep 20255011 AMAQI
29th Sep 20255012 PMAQI
29th Sep 2025511 PMAQI
29th Sep 2025532 PMAQI
29th Sep 2025543 PMAQI
29th Sep 2025554 PMAQI
29th Sep 2025555 PMAQI
29th Sep 2025556 PMAQI
29th Sep 2025557 PMAQI
29th Sep 2025488 PMAQI
29th Sep 2025579 PMAQI
29th Sep 20255510 PMAQI
29th Sep 20255111 PMAQI
30th Sep 20254912 AMAQI
30th Sep 2025541 AMAQI
30th Sep 2025532 AMAQI
30th Sep 2025483 AMAQI
30th Sep 2025384 AMAQI
24°C23/25°C
30th Sep 2025525 AMAQI
30th Sep 2025466 AMAQI
30th Sep 2025477 AMAQI
30th Sep 2025448 AMAQI
30th Sep 2025519 AMAQI
30th Sep 20254810 AMAQI
30th Sep 20255911 AMAQI
30th Sep 20256312 PMAQI
30th Sep 2025621 PMAQI
30th Sep 2025582 PMAQI
30th Sep 2025633 PMAQI
30th Sep 2025674 PMAQI
30th Sep 2025765 PMAQI
30th Sep 2025646 PMAQI
30th Sep 2025627 PMAQI
30th Sep 2025678 PMAQI
30th Sep 2025679 PMAQI
30th Sep 20256810 PMAQI
30th Sep 20256411 PMAQI
1st Oct 20257512 AMAQI
1st Oct 2025751 AMAQI
1st Oct 2025822 AMAQI
1st Oct 2025903 AMAQI
1st Oct 2025914 AMAQI
26°C24/28°C
1st Oct 2025875 AMAQI
1st Oct 2025826 AMAQI
1st Oct 2025887 AMAQI
1st Oct 2025808 AMAQI
1st Oct 2025779 AMAQI
1st Oct 20258310 AMAQI
1st Oct 20257611 AMAQI
1st Oct 20257512 PMAQI
1st Oct 2025711 PMAQI
1st Oct 2025662 PMAQI
1st Oct 2025663 PMAQI
1st Oct 2025634 PMAQI
1st Oct 2025665 PMAQI
1st Oct 2025676 PMAQI
1st Oct 2025657 PMAQI
1st Oct 2025658 PMAQI
1st Oct 2025779 PMAQI
1st Oct 20258410 PMAQI
1st Oct 20258911 PMAQI
2nd Oct 20258312 AMAQI
2nd Oct 2025841 AMAQI
2nd Oct 2025822 AMAQI
2nd Oct 2025913 AMAQI
2nd Oct 20251144 AMAQI
26°C23/30°C
2nd Oct 20251215 AMAQI
2nd Oct 2025986 AMAQI
2nd Oct 20251137 AMAQI
2nd Oct 20251098 AMAQI
2nd Oct 20251159 AMAQI
2nd Oct 202511510 AMAQI
2nd Oct 20258711 AMAQI
2nd Oct 20257212 PMAQI
2nd Oct 2025681 PMAQI
2nd Oct 2025682 PMAQI
2nd Oct 2025643 PMAQI
2nd Oct 2025624 PMAQI
2nd Oct 2025635 PMAQI
2nd Oct 2025626 PMAQI
2nd Oct 2025637 PMAQI
2nd Oct 2025638 PMAQI
2nd Oct 2025739 PMAQI
2nd Oct 20258210 PMAQI
2nd Oct 20257011 PMAQI
3rd Oct 20257212 AMAQI
3rd Oct 2025691 AMAQI
3rd Oct 2025692 AMAQI
3rd Oct 2025693 AMAQI
3rd Oct 2025734 AMAQI
27°C23/31°C
3rd Oct 2025825 AMAQI
3rd Oct 2025776 AMAQI
3rd Oct 2025717 AMAQI
3rd Oct 2025738 AMAQI
3rd Oct 2025749 AMAQI
3rd Oct 20257410 AMAQI
3rd Oct 20257011 AMAQI
3rd Oct 20256512 PMAQI
3rd Oct 2025641 PMAQI
3rd Oct 2025642 PMAQI
3rd Oct 2025593 PMAQI
3rd Oct 2025574 PMAQI
3rd Oct 2025595 PMAQI
3rd Oct 2025556 PMAQI
3rd Oct 2025717 PMAQI
3rd Oct 2025788 PMAQI
3rd Oct 2025849 PMAQI
3rd Oct 20258710 PMAQI
3rd Oct 20259811 PMAQI
4th Oct 20259712 AMAQI
4th Oct 2025961 AMAQI
4th Oct 2025842 AMAQI
4th Oct 2025853 AMAQI
4th Oct 2025834 AMAQI
27°C23/32°C
4th Oct 2025875 AMAQI
4th Oct 2025926 AMAQI
4th Oct 20251087 AMAQI
4th Oct 20251148 AMAQI
4th Oct 20251129 AMAQI
4th Oct 202512310 AMAQI
4th Oct 202511411 AMAQI
4th Oct 202510212 PMAQI
4th Oct 20251091 PMAQI
4th Oct 20251072 PMAQI
4th Oct 20251043 PMAQI
4th Oct 20251064 PMAQI
4th Oct 2025985 PMAQI
4th Oct 20251076 PMAQI
4th Oct 20251067 PMAQI
4th Oct 20251138 PMAQI
4th Oct 20251129 PMAQI
4th Oct 202511010 PMAQI
4th Oct 202512011 PMAQI
5th Oct 202510812 AMAQI
5th Oct 2025981 AMAQI
5th Oct 20251112 AMAQI
5th Oct 20251163 AMAQI
5th Oct 20251234 AMAQI
27°C23/32°C
5th Oct 20251325 AMAQI
5 AM5th Oct 20251466 AMAQI
5th Oct 20251557 AMAQI
5th Oct 20251528 AMAQI
5th Oct 20251489 AMAQI
5th Oct 202513910 AMAQI
5th Oct 202514011 AMAQI
11 AM5th Oct 202514512 PMAQI
5 PM
11 PM
4 AM
--°C/°C
Day time
Avg. Highest Time
8 AM - 10 AM
60AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
3 PM - 5 PM
48AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 10 AM (Avg. 60), while the lowest AQI was between 3 PM to 5 PM (Avg. 48).
Night time
Avg. Highest Time
9 PM - 11 PM
59AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
6 PM
52AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 59), while the lowest AQI was between 6 PM to 6 PM (Avg. 52).
2025 Days Vs Air Quality
Son Tay, Ha Noi, Vietnam
2025
15%
42
62%
171
18%
50
5%
13
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Good
42 DaysModerate
171 DaysPoor
50 DaysUnhealthy
13 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 15%
Health Risk Level:
Extreme
In 2025, 15% of 278 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Son Tay, Ha Noi, Vietnam
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
162AQI
162AQI
2nd January 2025
198AQI
198AQI
3rd January 2025
164AQI
164AQI
4th January 2025
145AQI
145AQI
5th January 2025
144AQI
144AQI
6th January 2025
151AQI
151AQI
7th January 2025
155AQI
155AQI
8th January 2025
147AQI
147AQI
9th January 2025
152AQI
152AQI
10th January 2025
103AQI
103AQI
11th January 2025
115AQI
115AQI
12th January 2025
121AQI
121AQI
13th January 2025
144AQI
144AQI
14th January 2025
144AQI
144AQI
15th January 2025
146AQI
146AQI
16th January 2025
143AQI
143AQI
17th January 2025
148AQI
148AQI
18th January 2025
159AQI
159AQI
19th January 2025
152AQI
152AQI
20th January 2025
168AQI
168AQI
21st January 2025
148AQI
148AQI
22nd January 2025
151AQI
151AQI
23rd January 2025
130AQI
130AQI
24th January 2025
117AQI
117AQI
25th January 2025
108AQI
108AQI
26th January 2025
70AQI
70AQI
27th January 2025
87AQI
87AQI
28th January 2025
77AQI
77AQI
29th January 2025
106AQI
106AQI
30th January 2025
98AQI
98AQI
31st January 2025
81AQI
81AQI
1st February 2025
79AQI
79AQI
2nd February 2025
69AQI
69AQI
3rd February 2025
60AQI
60AQI
4th February 2025
65AQI
65AQI
5th February 2025
91AQI
91AQI
6th February 2025
113AQI
113AQI
7th February 2025
58AQI
58AQI
8th February 2025
76AQI
76AQI
9th February 2025
97AQI
97AQI
10th February 2025
138AQI
138AQI
11th February 2025
151AQI
151AQI
12th February 2025
167AQI
167AQI
13th February 2025
148AQI
148AQI
14th February 2025
146AQI
146AQI
15th February 2025
151AQI
151AQI
16th February 2025
102AQI
102AQI
17th February 2025
122AQI
122AQI
18th February 2025
90AQI
90AQI
19th February 2025
117AQI
117AQI
20th February 2025
130AQI
130AQI
21st February 2025
122AQI
122AQI
22nd February 2025
132AQI
132AQI
23rd February 2025
80AQI
80AQI
24th February 2025
84AQI
84AQI
25th February 2025
93AQI
93AQI
26th February 2025
86AQI
86AQI
27th February 2025
136AQI
136AQI
28th February 2025
108AQI
108AQI
1st March 2025
111AQI
111AQI
2nd March 2025
92AQI
92AQI
3rd March 2025
94AQI
94AQI
4th March 2025
96AQI
96AQI
5th March 2025
95AQI
95AQI
6th March 2025
76AQI
76AQI
7th March 2025
80AQI
80AQI
8th March 2025
101AQI
101AQI
9th March 2025
128AQI
128AQI
10th March 2025
142AQI
142AQI
11th March 2025
127AQI
127AQI
12th March 2025
111AQI
111AQI
13th March 2025
95AQI
95AQI
14th March 2025
97AQI
97AQI
15th March 2025
89AQI
89AQI
16th March 2025
73AQI
73AQI
17th March 2025
89AQI
89AQI
18th March 2025
88AQI
88AQI
19th March 2025
84AQI
84AQI
20th March 2025
99AQI
99AQI
21st March 2025
117AQI
117AQI
22nd March 2025
118AQI
118AQI
23rd March 2025
121AQI
121AQI
24th March 2025
126AQI
126AQI
25th March 2025
131AQI
131AQI
26th March 2025
114AQI
114AQI
27th March 2025
112AQI
112AQI
28th March 2025
112AQI
112AQI
29th March 2025
82AQI
82AQI
30th March 2025
67AQI
67AQI
31st March 2025
75AQI
75AQI
1st April 2025
94AQI
94AQI
2nd April 2025
120AQI
120AQI
3rd April 2025
110AQI
110AQI
4th April 2025
133AQI
133AQI
5th April 2025
106AQI
106AQI
6th April 2025
123AQI
123AQI
7th April 2025
111AQI
111AQI
8th April 2025
114AQI
114AQI
9th April 2025
93AQI
93AQI
10th April 2025
98AQI
98AQI
11th April 2025
97AQI
97AQI
12th April 2025
102AQI
102AQI
13th April 2025
83AQI
83AQI
14th April 2025
93AQI
93AQI
15th April 2025
98AQI
98AQI
16th April 2025
100AQI
100AQI
17th April 2025
98AQI
98AQI
18th April 2025
100AQI
100AQI
19th April 2025
95AQI
95AQI
20th April 2025
81AQI
81AQI
21st April 2025
82AQI
82AQI
22nd April 2025
91AQI
91AQI
23rd April 2025
93AQI
93AQI
24th April 2025
83AQI
83AQI
25th April 2025
77AQI
77AQI
26th April 2025
77AQI
77AQI
27th April 2025
69AQI
69AQI
28th April 2025
66AQI
66AQI
29th April 2025
73AQI
73AQI
30th April 2025
73AQI
73AQI
1st May 2025
60AQI
60AQI
2nd May 2025
74AQI
74AQI
3rd May 2025
75AQI
75AQI
4th May 2025
74AQI
74AQI
5th May 2025
77AQI
77AQI
6th May 2025
73AQI
73AQI
7th May 2025
75AQI
75AQI
8th May 2025
75AQI
75AQI
9th May 2025
78AQI
78AQI
10th May 2025
79AQI
79AQI
11th May 2025
53AQI
53AQI
12th May 2025
67AQI
67AQI
13th May 2025
67AQI
67AQI
14th May 2025
65AQI
65AQI
15th May 2025
60AQI
60AQI
16th May 2025
59AQI
59AQI
17th May 2025
56AQI
56AQI
18th May 2025
55AQI
55AQI
19th May 2025
57AQI
57AQI
20th May 2025
58AQI
58AQI
21st May 2025
56AQI
56AQI
22nd May 2025
56AQI
56AQI
23rd May 2025
56AQI
56AQI
24th May 2025
54AQI
54AQI
25th May 2025
55AQI
55AQI
26th May 2025
60AQI
60AQI
27th May 2025
83AQI
83AQI
28th May 2025
81AQI
81AQI
29th May 2025
64AQI
64AQI
30th May 2025
63AQI
63AQI
31st May 2025
59AQI
59AQI
1st June 2025
54AQI
54AQI
2nd June 2025
54AQI
54AQI
3rd June 2025
55AQI
55AQI
4th June 2025
58AQI
58AQI
5th June 2025
64AQI
64AQI
6th June 2025
59AQI
59AQI
7th June 2025
58AQI
58AQI
8th June 2025
58AQI
58AQI
9th June 2025
62AQI
62AQI
10th June 2025
57AQI
57AQI
11th June 2025
62AQI
62AQI
12th June 2025
61AQI
61AQI
13th June 2025
56AQI
56AQI
14th June 2025
64AQI
64AQI
15th June 2025
69AQI
69AQI
16th June 2025
67AQI
67AQI
17th June 2025
62AQI
62AQI
18th June 2025
54AQI
54AQI
19th June 2025
61AQI
61AQI
20th June 2025
66AQI
66AQI
21st June 2025
55AQI
55AQI
22nd June 2025
54AQI
54AQI
23rd June 2025
59AQI
59AQI
24th June 2025
62AQI
62AQI
25th June 2025
58AQI
58AQI
26th June 2025
57AQI
57AQI
27th June 2025
58AQI
58AQI
28th June 2025
53AQI
53AQI
29th June 2025
53AQI
53AQI
30th June 2025
53AQI
53AQI
1st July 2025
47AQI
47AQI
2nd July 2025
47AQI
47AQI
3rd July 2025
53AQI
53AQI
4th July 2025
58AQI
58AQI
5th July 2025
60AQI
60AQI
6th July 2025
58AQI
58AQI
7th July 2025
61AQI
61AQI
8th July 2025
58AQI
58AQI
9th July 2025
61AQI
61AQI
10th July 2025
54AQI
54AQI
11th July 2025
54AQI
54AQI
12th July 2025
53AQI
53AQI
13th July 2025
54AQI
54AQI
14th July 2025
61AQI
61AQI
15th July 2025
67AQI
67AQI
16th July 2025
58AQI
58AQI
17th July 2025
57AQI
57AQI
18th July 2025
58AQI
58AQI
19th July 2025
63AQI
63AQI
20th July 2025
58AQI
58AQI
21st July 2025
57AQI
57AQI
22nd July 2025
48AQI
48AQI
23rd July 2025
49AQI
49AQI
24th July 2025
49AQI
49AQI
25th July 2025
55AQI
55AQI
26th July 2025
55AQI
55AQI
27th July 2025
57AQI
57AQI
28th July 2025
63AQI
63AQI
29th July 2025
67AQI
67AQI
30th July 2025
66AQI
66AQI
31st July 2025
59AQI
59AQI
1st August 2025
52AQI
52AQI
2nd August 2025
54AQI
54AQI
3rd August 2025
56AQI
56AQI
4th August 2025
56AQI
56AQI
5th August 2025
54AQI
54AQI
6th August 2025
52AQI
52AQI
7th August 2025
54AQI
54AQI
8th August 2025
53AQI
53AQI
9th August 2025
50AQI
50AQI
10th August 2025
52AQI
52AQI
11th August 2025
54AQI
54AQI
12th August 2025
50AQI
50AQI
13th August 2025
52AQI
52AQI
14th August 2025
54AQI
54AQI
15th August 2025
44AQI
44AQI
16th August 2025
41AQI
41AQI
17th August 2025
39AQI
39AQI
18th August 2025
39AQI
39AQI
19th August 2025
42AQI
42AQI
20th August 2025
45AQI
45AQI
21st August 2025
48AQI
48AQI
22nd August 2025
46AQI
46AQI
23rd August 2025
45AQI
45AQI
24th August 2025
44AQI
44AQI
25th August 2025
35AQI
35AQI
26th August 2025
34AQI
34AQI
27th August 2025
40AQI
40AQI
28th August 2025
46AQI
46AQI
29th August 2025
46AQI
46AQI
30th August 2025
40AQI
40AQI
31st August 2025
40AQI
40AQI
1st September 2025
42AQI
42AQI
2nd September 2025
41AQI
41AQI
3rd September 2025
40AQI
40AQI
4th September 2025
49AQI
49AQI
5th September 2025
41AQI
41AQI
6th September 2025
40AQI
40AQI
7th September 2025
50AQI
50AQI
8th September 2025
56AQI
56AQI
9th September 2025
47AQI
47AQI
10th September 2025
50AQI
50AQI
11th September 2025
45AQI
45AQI
12th September 2025
41AQI
41AQI
13th September 2025
39AQI
39AQI
14th September 2025
42AQI
42AQI
15th September 2025
43AQI
43AQI
16th September 2025
47AQI
47AQI
17th September 2025
48AQI
48AQI
18th September 2025
49AQI
49AQI
19th September 2025
52AQI
52AQI
20th September 2025
61AQI
61AQI
21st September 2025
65AQI
65AQI
22nd September 2025
58AQI
58AQI
23rd September 2025
60AQI
60AQI
24th September 2025
53AQI
53AQI
25th September 2025
52AQI
52AQI
26th September 2025
62AQI
62AQI
27th September 2025
50AQI
50AQI
28th September 2025
52AQI
52AQI
29th September 2025
54AQI
54AQI
30th September 2025
58AQI
58AQI
1st October 2025
77AQI
77AQI
2nd October 2025
84AQI
84AQI
3rd October 2025
72AQI
72AQI
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
133AQI
108AQI
101AQI
94AQI
65AQI
59AQI
57AQI
47AQI
50AQI
78AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202579AQI
5
16
10
13
12
3
17
14
22
8
31
30
5
26
19
12
18
12
3
42
171
50
13
Highest AQI recorded in
January133AQI
Lowest AQI recorded in
August47AQI
202471AQI
4
12
1
1
1
3
9
2
28
21
10
29
6
15
5
3
7
8
14
2
1
25
4
15
13
3
76
122
36
8
Highest AQI recorded in
December115AQI
Lowest AQI recorded in
April2AQI
202334AQI
2
1
25
6
27
7
Highest AQI recorded in
November43AQI
Lowest AQI recorded in
December33AQI
20219AQI
2
2
12
16
Highest AQI recorded in
July9AQI
Lowest AQI recorded in
May7AQI
Most & Least Polluted Years Over the Last 4 Years
Most Polluted Year Recorded
2025(Avg.)
79AQILeast Polluted Year Recorded
2021(Avg.)
9AQISon Tay's annual 2025 AQI (79) shows an average percentage change of 315.08% (worsened AQI) compared to previous years: 2021 (9), 2023 (34), 2024 (71).
