Country Background

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+

August Air Quality Analysis

Son Tay, Ha Noi, Vietnam

2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
3rd Aug 2025
56AQI
Lowest AQI recorded on
14th Aug 2024
28AQI


Same Day Analysis (16th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 44 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 17th Aug - 18th Aug 2025

Son Tay, Ha Noi, Vietnam

AQI
Day
Night
.

5 AM17th Aug 2025

6 PM

4 AM18th Aug 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
3AM18th Aug

53AQI

Avg. Lowest Time
3PM17th Aug

24AQI

In the last 24 hours,

Son Tay's AQI reached its highest point of 53 at 3 AM during the Night, while the lowest point, 24, was recorded at 3 PM during the Night between 17th Aug and 18th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Son Tay, Ha Noi, Vietnam

JulAug
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th
Day
Night
19th Jul 2025605 AMAQI
19th Jul 2025606 AMAQI
19th Jul 2025707 AMAQI
19th Jul 2025748 AMAQI
19th Jul 2025799 AMAQI
19th Jul 20258110 AMAQI
19th Jul 20257511 AMAQI
19th Jul 20257212 PMAQI
19th Jul 2025761 PMAQI
19th Jul 2025682 PMAQI
19th Jul 2025653 PMAQI
19th Jul 2025664 PMAQI
19th Jul 2025615 PMAQI
19th Jul 2025586 PMAQI
19th Jul 2025607 PMAQI
19th Jul 2025588 PMAQI
19th Jul 2025579 PMAQI
19th Jul 20255710 PMAQI
19th Jul 20255711 PMAQI
20th Jul 20255912 AMAQI
20th Jul 2025611 AMAQI
20th Jul 2025622 AMAQI
20th Jul 2025633 AMAQI
20th Jul 2025644 AMAQI

30°C24/36°C

20th Jul 2025645 AMAQI
20th Jul 2025636 AMAQI
20th Jul 2025597 AMAQI
20th Jul 2025538 AMAQI
20th Jul 2025529 AMAQI
20th Jul 20255310 AMAQI
20th Jul 20255411 AMAQI
20th Jul 20255412 PMAQI
20th Jul 2025551 PMAQI
20th Jul 2025572 PMAQI
20th Jul 2025563 PMAQI
20th Jul 2025574 PMAQI
20th Jul 2025605 PMAQI
20th Jul 2025576 PMAQI
20th Jul 2025567 PMAQI
20th Jul 2025588 PMAQI
20th Jul 2025589 PMAQI
20th Jul 20255910 PMAQI
20th Jul 20255711 PMAQI
21st Jul 20256312 AMAQI
21st Jul 2025641 AMAQI
21st Jul 2025612 AMAQI
21st Jul 2025603 AMAQI
21st Jul 2025604 AMAQI

27°C24/32°C

21st Jul 2025605 AMAQI
21st Jul 2025606 AMAQI
21st Jul 2025597 AMAQI
21st Jul 2025548 AMAQI
21st Jul 2025579 AMAQI
21st Jul 20255810 AMAQI
21st Jul 20255511 AMAQI
21st Jul 20255412 PMAQI
21st Jul 2025541 PMAQI
21st Jul 2025532 PMAQI
21st Jul 2025543 PMAQI
21st Jul 2025544 PMAQI
21st Jul 2025535 PMAQI
21st Jul 2025546 PMAQI
21st Jul 2025557 PMAQI
21st Jul 2025558 PMAQI
21st Jul 2025549 PMAQI
21st Jul 20255410 PMAQI
21st Jul 20255411 PMAQI
22nd Jul 20255712 AMAQI
22nd Jul 2025581 AMAQI
22nd Jul 2025592 AMAQI
22nd Jul 2025583 AMAQI
22nd Jul 2025584 AMAQI

26°C25/28°C

22nd Jul 2025585 AMAQI
22nd Jul 2025586 AMAQI
22nd Jul 2025457 AMAQI
22nd Jul 2025408 AMAQI
22nd Jul 2025409 AMAQI
22nd Jul 20253710 AMAQI
22nd Jul 20253411 AMAQI
22nd Jul 20253812 PMAQI
22nd Jul 2025381 PMAQI
22nd Jul 2025372 PMAQI
22nd Jul 2025433 PMAQI
22nd Jul 2025394 PMAQI
22nd Jul 2025405 PMAQI
22nd Jul 2025436 PMAQI
22nd Jul 2025487 PMAQI
22nd Jul 2025508 PMAQI
22nd Jul 2025509 PMAQI
22nd Jul 20255010 PMAQI
22nd Jul 20255011 PMAQI
23rd Jul 20255012 AMAQI
23rd Jul 2025561 AMAQI
23rd Jul 2025562 AMAQI
23rd Jul 2025543 AMAQI
23rd Jul 2025544 AMAQI

26°C25/30°C

23rd Jul 2025555 AMAQI
23rd Jul 2025556 AMAQI
23rd Jul 2025517 AMAQI
23rd Jul 2025488 AMAQI
23rd Jul 2025509 AMAQI
23rd Jul 20254810 AMAQI
23rd Jul 20254411 AMAQI
23rd Jul 20254212 PMAQI
23rd Jul 2025411 PMAQI
23rd Jul 2025372 PMAQI
23rd Jul 2025373 PMAQI
23rd Jul 2025404 PMAQI
23rd Jul 2025435 PMAQI
23rd Jul 2025526 PMAQI
23rd Jul 2025527 PMAQI
23rd Jul 2025528 PMAQI
23rd Jul 2025529 PMAQI
23rd Jul 20255110 PMAQI
23rd Jul 20255011 PMAQI
24th Jul 20255112 AMAQI
24th Jul 2025531 AMAQI
24th Jul 2025532 AMAQI
24th Jul 2025533 AMAQI
24th Jul 2025534 AMAQI

27°C25/31°C

24th Jul 2025535 AMAQI
24th Jul 2025536 AMAQI
24th Jul 2025467 AMAQI
24th Jul 2025528 AMAQI
24th Jul 2025539 AMAQI
24th Jul 20255010 AMAQI
24th Jul 20254111 AMAQI
24th Jul 20253612 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025392 PMAQI
24th Jul 2025403 PMAQI
24th Jul 2025394 PMAQI
24th Jul 2025445 PMAQI
24th Jul 2025466 PMAQI
24th Jul 2025517 PMAQI
24th Jul 2025538 PMAQI
24th Jul 2025529 PMAQI
24th Jul 20255310 PMAQI
24th Jul 20255211 PMAQI
25th Jul 20255312 AMAQI
25th Jul 2025531 AMAQI
25th Jul 2025522 AMAQI
25th Jul 2025523 AMAQI
25th Jul 2025524 AMAQI

27°C25/32°C

25th Jul 2025525 AMAQI
25th Jul 2025526 AMAQI
25th Jul 2025567 AMAQI
25th Jul 2025588 AMAQI
25th Jul 2025619 AMAQI
25th Jul 20255810 AMAQI
25th Jul 20256011 AMAQI
25th Jul 20255512 PMAQI
25th Jul 2025551 PMAQI
25th Jul 2025532 PMAQI
25th Jul 2025603 PMAQI
25th Jul 2025574 PMAQI
25th Jul 2025595 PMAQI
25th Jul 2025526 PMAQI
25th Jul 2025547 PMAQI
25th Jul 2025578 PMAQI
25th Jul 2025569 PMAQI
25th Jul 20255410 PMAQI
25th Jul 20254911 PMAQI
26th Jul 20255512 AMAQI
26th Jul 2025541 AMAQI
26th Jul 2025532 AMAQI
26th Jul 2025543 AMAQI
26th Jul 2025544 AMAQI

28°C25/34°C

26th Jul 2025545 AMAQI
26th Jul 2025546 AMAQI
26th Jul 2025567 AMAQI
26th Jul 2025568 AMAQI
26th Jul 2025559 AMAQI
26th Jul 20255910 AMAQI
26th Jul 20256711 AMAQI
26th Jul 20255912 PMAQI
26th Jul 2025581 PMAQI
26th Jul 2025602 PMAQI
26th Jul 2025603 PMAQI
26th Jul 2025634 PMAQI
26th Jul 2025555 PMAQI
26th Jul 2025536 PMAQI
26th Jul 2025527 PMAQI
26th Jul 2025548 PMAQI
26th Jul 2025519 PMAQI
26th Jul 20255110 PMAQI
26th Jul 20255311 PMAQI
27th Jul 20255412 AMAQI
27th Jul 2025551 AMAQI
27th Jul 2025542 AMAQI
27th Jul 2025543 AMAQI
27th Jul 2025554 AMAQI

29°C25/34°C

27th Jul 2025565 AMAQI
27th Jul 2025556 AMAQI
27th Jul 2025577 AMAQI
27th Jul 2025638 AMAQI
27th Jul 2025639 AMAQI
27th Jul 20256210 AMAQI
27th Jul 20255811 AMAQI
27th Jul 20255312 PMAQI
27th Jul 2025511 PMAQI
27th Jul 2025512 PMAQI
27th Jul 2025553 PMAQI
27th Jul 2025554 PMAQI
27th Jul 2025545 PMAQI
27th Jul 2025646 PMAQI
27th Jul 2025597 PMAQI
27th Jul 2025638 PMAQI
27th Jul 2025619 PMAQI
27th Jul 20256110 PMAQI
27th Jul 20256211 PMAQI
28th Jul 20256212 AMAQI
28th Jul 2025581 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025573 AMAQI
28th Jul 2025574 AMAQI

29°C25/34°C

28th Jul 2025565 AMAQI
28th Jul 2025576 AMAQI
28th Jul 2025647 AMAQI
28th Jul 2025668 AMAQI
28th Jul 2025769 AMAQI
28th Jul 20257510 AMAQI
28th Jul 20256811 AMAQI
28th Jul 20256312 PMAQI
28th Jul 2025641 PMAQI
28th Jul 2025642 PMAQI
28th Jul 2025623 PMAQI
28th Jul 2025624 PMAQI
28th Jul 2025615 PMAQI
28th Jul 2025616 PMAQI
28th Jul 2025617 PMAQI
28th Jul 2025618 PMAQI
28th Jul 2025739 PMAQI
28th Jul 20257510 PMAQI
28th Jul 20256811 PMAQI
29th Jul 20256212 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025592 AMAQI
29th Jul 2025603 AMAQI
29th Jul 2025614 AMAQI

30°C26/35°C

29th Jul 2025605 AMAQI
29th Jul 2025616 AMAQI
29th Jul 2025707 AMAQI
29th Jul 2025868 AMAQI
29th Jul 2025959 AMAQI
29th Jul 20258910 AMAQI
29th Jul 20257611 AMAQI
29th Jul 20257812 PMAQI
29th Jul 2025781 PMAQI
29th Jul 2025732 PMAQI
29th Jul 2025603 PMAQI
29th Jul 2025584 PMAQI
29th Jul 2025625 PMAQI
29th Jul 2025606 PMAQI
29th Jul 2025667 PMAQI
29th Jul 2025688 PMAQI
29th Jul 2025679 PMAQI
29th Jul 20256610 PMAQI
29th Jul 20256611 PMAQI
30th Jul 20256612 AMAQI
30th Jul 2025641 AMAQI
30th Jul 2025622 AMAQI
30th Jul 2025653 AMAQI
30th Jul 2025644 AMAQI

31°C27/36°C

30th Jul 2025645 AMAQI
30th Jul 2025656 AMAQI
30th Jul 2025707 AMAQI
30th Jul 2025808 AMAQI
30th Jul 2025829 AMAQI
30th Jul 20258010 AMAQI
30th Jul 20256611 AMAQI
30th Jul 20256112 PMAQI
30th Jul 2025661 PMAQI
30th Jul 2025702 PMAQI
30th Jul 2025683 PMAQI
30th Jul 2025684 PMAQI
30th Jul 2025665 PMAQI
30th Jul 2025666 PMAQI
30th Jul 2025647 PMAQI
30th Jul 2025608 PMAQI
30th Jul 2025609 PMAQI
30th Jul 20255810 PMAQI
30th Jul 20255811 PMAQI
31st Jul 20255812 AMAQI
31st Jul 2025581 AMAQI
31st Jul 2025652 AMAQI
31st Jul 2025653 AMAQI
31st Jul 2025654 AMAQI

31°C27/36°C

31st Jul 2025655 AMAQI
31st Jul 2025656 AMAQI
31st Jul 2025657 AMAQI
31st Jul 2025658 AMAQI
31st Jul 2025609 AMAQI
31st Jul 20255810 AMAQI
31st Jul 20255611 AMAQI
31st Jul 20255512 PMAQI
31st Jul 2025531 PMAQI
31st Jul 2025562 PMAQI
31st Jul 2025463 PMAQI
31st Jul 2025514 PMAQI
31st Jul 2025545 PMAQI
31st Jul 2025576 PMAQI
31st Jul 2025607 PMAQI
31st Jul 2025608 PMAQI
31st Jul 2025619 PMAQI
31st Jul 20256010 PMAQI
31st Jul 20256211 PMAQI
1st Aug 20255712 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025552 AMAQI
1st Aug 2025543 AMAQI
1st Aug 2025544 AMAQI

31°C27/36°C

1st Aug 2025555 AMAQI
1st Aug 2025566 AMAQI
1st Aug 2025597 AMAQI
1st Aug 2025568 AMAQI
1st Aug 2025569 AMAQI
1st Aug 20255610 AMAQI
1st Aug 20255211 AMAQI
1st Aug 20255012 PMAQI
1st Aug 2025371 PMAQI
1st Aug 2025502 PMAQI
1st Aug 2025413 PMAQI
1st Aug 2025404 PMAQI
1st Aug 2025495 PMAQI
1st Aug 2025476 PMAQI
1st Aug 2025517 PMAQI
1st Aug 2025508 PMAQI
1st Aug 2025539 PMAQI
1st Aug 20255610 PMAQI
1st Aug 20255311 PMAQI
2nd Aug 20255412 AMAQI
2nd Aug 2025561 AMAQI
2nd Aug 2025562 AMAQI
2nd Aug 2025563 AMAQI
2nd Aug 2025564 AMAQI

27°C25/31°C

2nd Aug 2025565 AMAQI
2nd Aug 2025566 AMAQI
2nd Aug 2025467 AMAQI
2nd Aug 2025478 AMAQI
2nd Aug 2025469 AMAQI
2nd Aug 20255210 AMAQI
2nd Aug 20255011 AMAQI
2nd Aug 20255212 PMAQI
2nd Aug 2025541 PMAQI
2nd Aug 2025492 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025564 PMAQI
2nd Aug 2025595 PMAQI
2nd Aug 2025606 PMAQI
2nd Aug 2025527 PMAQI
2nd Aug 2025578 PMAQI
2nd Aug 2025599 PMAQI
2nd Aug 20255610 PMAQI
2nd Aug 20255411 PMAQI
3rd Aug 20255612 AMAQI
3rd Aug 2025561 AMAQI
3rd Aug 2025562 AMAQI
3rd Aug 2025553 AMAQI
3rd Aug 2025564 AMAQI

30°C25/36°C

3rd Aug 2025555 AMAQI
3rd Aug 2025566 AMAQI
3rd Aug 2025567 AMAQI
3rd Aug 2025588 AMAQI
3rd Aug 2025619 AMAQI
3rd Aug 20256210 AMAQI
3rd Aug 20256211 AMAQI
3rd Aug 20257012 PMAQI
3rd Aug 2025551 PMAQI
3rd Aug 2025562 PMAQI
3rd Aug 2025543 PMAQI
3rd Aug 2025584 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025466 PMAQI
3rd Aug 2025537 PMAQI
3rd Aug 2025568 PMAQI
3rd Aug 2025599 PMAQI
3rd Aug 20255610 PMAQI
3rd Aug 20255811 PMAQI
4th Aug 20255512 AMAQI
4th Aug 2025551 AMAQI
4th Aug 2025562 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025564 AMAQI

31°C26/37°C

4th Aug 2025555 AMAQI
4th Aug 2025566 AMAQI
4th Aug 2025607 AMAQI
4th Aug 2025558 AMAQI
4th Aug 2025559 AMAQI
4th Aug 20255210 AMAQI
4th Aug 20255211 AMAQI
4th Aug 20255412 PMAQI
4th Aug 2025551 PMAQI
4th Aug 2025522 PMAQI
4th Aug 2025543 PMAQI
4th Aug 2025544 PMAQI
4th Aug 2025545 PMAQI
4th Aug 2025566 PMAQI
4th Aug 2025577 PMAQI
4th Aug 2025588 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255710 PMAQI
4th Aug 20255611 PMAQI
5th Aug 20255712 AMAQI
5th Aug 2025561 AMAQI
5th Aug 2025562 AMAQI
5th Aug 2025563 AMAQI
5th Aug 2025564 AMAQI

30°C27/34°C

5th Aug 2025565 AMAQI
5th Aug 2025566 AMAQI
5th Aug 2025527 AMAQI
5th Aug 2025508 AMAQI
5th Aug 2025529 AMAQI
5th Aug 20255010 AMAQI
5th Aug 20255211 AMAQI
5th Aug 20255712 PMAQI
5th Aug 2025521 PMAQI
5th Aug 2025562 PMAQI
5th Aug 2025583 PMAQI
5th Aug 2025504 PMAQI
5th Aug 2025545 PMAQI
5th Aug 2025566 PMAQI
5th Aug 2025547 PMAQI
5th Aug 2025538 PMAQI
5th Aug 2025529 PMAQI
5th Aug 20255210 PMAQI
5th Aug 20255311 PMAQI
6th Aug 20255612 AMAQI
6th Aug 2025561 AMAQI
6th Aug 2025562 AMAQI
6th Aug 2025563 AMAQI
6th Aug 2025564 AMAQI

27°C25/28°C

6th Aug 2025565 AMAQI
6th Aug 2025556 AMAQI
6th Aug 2025437 AMAQI
6th Aug 2025378 AMAQI
6th Aug 2025429 AMAQI
6th Aug 20254810 AMAQI
6th Aug 20255211 AMAQI
6th Aug 20255312 PMAQI
6th Aug 2025471 PMAQI
6th Aug 2025522 PMAQI
6th Aug 2025433 PMAQI
6th Aug 2025474 PMAQI
6th Aug 2025545 PMAQI
6th Aug 2025546 PMAQI
6th Aug 2025547 PMAQI
6th Aug 2025548 PMAQI
6th Aug 2025569 PMAQI
6th Aug 20255410 PMAQI
6th Aug 20255511 PMAQI
7th Aug 20255512 AMAQI
7th Aug 2025551 AMAQI
7th Aug 2025542 AMAQI
7th Aug 2025543 AMAQI
7th Aug 2025544 AMAQI

27°C25/31°C

7th Aug 2025545 AMAQI
7th Aug 2025546 AMAQI
7th Aug 2025367 AMAQI
7th Aug 2025488 AMAQI
7th Aug 2025509 AMAQI
7th Aug 20255610 AMAQI
7th Aug 20254511 AMAQI
7th Aug 20255012 PMAQI
7th Aug 2025521 PMAQI
7th Aug 2025562 PMAQI
7th Aug 2025553 PMAQI
7th Aug 2025564 PMAQI
7th Aug 2025515 PMAQI
7th Aug 2025566 PMAQI
7th Aug 2025597 PMAQI
7th Aug 2025578 PMAQI
7th Aug 2025609 PMAQI
7th Aug 20255910 PMAQI
7th Aug 20255911 PMAQI
8th Aug 20255712 AMAQI
8th Aug 2025541 AMAQI
8th Aug 2025532 AMAQI
8th Aug 2025543 AMAQI
8th Aug 2025544 AMAQI

28°C25/33°C

8th Aug 2025545 AMAQI
8th Aug 2025546 AMAQI
8th Aug 2025617 AMAQI
8th Aug 2025658 AMAQI
8th Aug 2025689 AMAQI
8th Aug 20256910 AMAQI
8th Aug 20255611 AMAQI
8th Aug 20255212 PMAQI
8th Aug 2025521 PMAQI
8th Aug 2025492 PMAQI
8th Aug 2025433 PMAQI
8th Aug 2025364 PMAQI
8th Aug 2025375 PMAQI
8th Aug 2025416 PMAQI
8th Aug 2025527 PMAQI
8th Aug 2025548 PMAQI
8th Aug 2025549 PMAQI
8th Aug 20255510 PMAQI
8th Aug 20255511 PMAQI
9th Aug 20255812 AMAQI
9th Aug 2025561 AMAQI
9th Aug 2025562 AMAQI
9th Aug 2025563 AMAQI
9th Aug 2025564 AMAQI

29°C25/35°C

9th Aug 2025565 AMAQI
9th Aug 2025566 AMAQI
9th Aug 2025537 AMAQI
9th Aug 2025528 AMAQI
9th Aug 2025529 AMAQI
9th Aug 20254510 AMAQI
9th Aug 20255011 AMAQI
9th Aug 20254412 PMAQI
9th Aug 2025361 PMAQI
9th Aug 2025392 PMAQI
9th Aug 2025383 PMAQI
9th Aug 2025404 PMAQI
9th Aug 2025345 PMAQI
9th Aug 2025426 PMAQI
9th Aug 2025507 PMAQI
9th Aug 2025548 PMAQI
9th Aug 2025589 PMAQI
9th Aug 20255610 PMAQI
9th Aug 20255411 PMAQI
10th Aug 20255812 AMAQI
10th Aug 2025581 AMAQI
10th Aug 2025572 AMAQI
10th Aug 2025563 AMAQI
10th Aug 2025564 AMAQI

30°C25/35°C

10th Aug 2025565 AMAQI
10th Aug 2025566 AMAQI
10th Aug 2025567 AMAQI
10th Aug 2025548 AMAQI
10th Aug 2025529 AMAQI
10th Aug 20255010 AMAQI
10th Aug 20255411 AMAQI
10th Aug 20255412 PMAQI
10th Aug 2025551 PMAQI
10th Aug 2025562 PMAQI
10th Aug 2025413 PMAQI
10th Aug 2025334 PMAQI
10th Aug 2025355 PMAQI
10th Aug 2025386 PMAQI
10th Aug 2025537 PMAQI
10th Aug 2025528 PMAQI
10th Aug 2025559 PMAQI
10th Aug 20255610 PMAQI
10th Aug 20256011 PMAQI
11th Aug 20256212 AMAQI
11th Aug 2025581 AMAQI
11th Aug 2025572 AMAQI
11th Aug 2025563 AMAQI
11th Aug 2025564 AMAQI

29°C25/34°C

11th Aug 2025565 AMAQI
11th Aug 2025566 AMAQI
11th Aug 2025617 AMAQI
11th Aug 2025668 AMAQI
11th Aug 2025609 AMAQI
11th Aug 20256310 AMAQI
11th Aug 20255511 AMAQI
11th Aug 20255212 PMAQI
11th Aug 2025501 PMAQI
11th Aug 2025512 PMAQI
11th Aug 2025353 PMAQI
11th Aug 2025544 PMAQI
11th Aug 2025505 PMAQI
11th Aug 2025486 PMAQI
11th Aug 2025517 PMAQI
11th Aug 2025528 PMAQI
11th Aug 2025549 PMAQI
11th Aug 20255210 PMAQI
11th Aug 20255311 PMAQI
12th Aug 20255212 AMAQI
12th Aug 2025561 AMAQI
12th Aug 2025542 AMAQI
12th Aug 2025543 AMAQI
12th Aug 2025544 AMAQI

29°C25/33°C

12th Aug 2025545 AMAQI
12th Aug 2025536 AMAQI
12th Aug 2025407 AMAQI
12th Aug 2025408 AMAQI
12th Aug 2025469 AMAQI
12th Aug 20255210 AMAQI
12th Aug 20255111 AMAQI
12th Aug 20254912 PMAQI
12th Aug 2025431 PMAQI
12th Aug 2025442 PMAQI
12th Aug 2025483 PMAQI
12th Aug 2025534 PMAQI
12th Aug 2025445 PMAQI
12th Aug 2025486 PMAQI
12th Aug 2025527 PMAQI
12th Aug 2025528 PMAQI
12th Aug 2025529 PMAQI
12th Aug 20255410 PMAQI
12th Aug 20255211 PMAQI
13th Aug 20255312 AMAQI
13th Aug 2025521 AMAQI
13th Aug 2025522 AMAQI
13th Aug 2025533 AMAQI
13th Aug 2025534 AMAQI

29°C25/33°C

13th Aug 2025525 AMAQI
13th Aug 2025526 AMAQI
13th Aug 2025547 AMAQI
13th Aug 2025508 AMAQI
13th Aug 2025649 AMAQI
13th Aug 20256010 AMAQI
13th Aug 20255611 AMAQI
13th Aug 20255212 PMAQI
13th Aug 2025491 PMAQI
13th Aug 2025482 PMAQI
13th Aug 2025423 PMAQI
13th Aug 2025504 PMAQI
13th Aug 2025445 PMAQI
13th Aug 2025446 PMAQI
13th Aug 2025497 PMAQI
13th Aug 2025518 PMAQI
13th Aug 2025539 PMAQI
13th Aug 20255210 PMAQI
13th Aug 20255811 PMAQI
14th Aug 20255312 AMAQI
14th Aug 2025521 AMAQI
14th Aug 2025532 AMAQI
14th Aug 2025523 AMAQI
14th Aug 2025524 AMAQI

29°C25/33°C

14th Aug 2025525 AMAQI
14th Aug 2025526 AMAQI
14th Aug 2025517 AMAQI
14th Aug 2025528 AMAQI
14th Aug 2025499 AMAQI
14th Aug 20254710 AMAQI
14th Aug 20256011 AMAQI
14th Aug 20255712 PMAQI
14th Aug 2025531 PMAQI
14th Aug 2025412 PMAQI
14th Aug 2025483 PMAQI
14th Aug 2025534 PMAQI
14th Aug 2025585 PMAQI
14th Aug 2025576 PMAQI
14th Aug 2025597 PMAQI
14th Aug 2025638 PMAQI
14th Aug 2025569 PMAQI
14th Aug 20255310 PMAQI
14th Aug 20256011 PMAQI
15th Aug 20255312 AMAQI
15th Aug 2025511 AMAQI
15th Aug 2025532 AMAQI
15th Aug 2025523 AMAQI
15th Aug 2025544 AMAQI

30°C26/36°C

15th Aug 2025535 AMAQI
15th Aug 2025526 AMAQI
15th Aug 2025367 AMAQI
15th Aug 2025258 AMAQI
15th Aug 2025359 AMAQI
15th Aug 20253210 AMAQI
15th Aug 20254011 AMAQI
15th Aug 20253612 PMAQI
15th Aug 2025411 PMAQI
15th Aug 2025412 PMAQI
15th Aug 2025403 PMAQI
15th Aug 2025344 PMAQI
15th Aug 2025345 PMAQI
15th Aug 2025396 PMAQI
15th Aug 2025457 PMAQI
15th Aug 2025488 PMAQI
15th Aug 2025489 PMAQI
15th Aug 20254610 PMAQI
15th Aug 20254611 PMAQI
16th Aug 20255112 AMAQI
16th Aug 2025521 AMAQI
16th Aug 2025522 AMAQI
16th Aug 2025523 AMAQI
16th Aug 2025514 AMAQI

25°C24/26°C

16th Aug 2025525 AMAQI
16th Aug 2025526 AMAQI
16th Aug 2025377 AMAQI
16th Aug 2025318 AMAQI
16th Aug 2025329 AMAQI
16th Aug 20252810 AMAQI
16th Aug 20254311 AMAQI
16th Aug 20253912 PMAQI
16th Aug 2025301 PMAQI
16th Aug 2025302 PMAQI
16th Aug 2025343 PMAQI
16th Aug 2025344 PMAQI
16th Aug 2025305 PMAQI
16th Aug 2025346 PMAQI
16th Aug 2025387 PMAQI
16th Aug 2025428 PMAQI
16th Aug 2025459 PMAQI
16th Aug 20254210 PMAQI
16th Aug 20254311 PMAQI
17th Aug 20254912 AMAQI
17th Aug 2025501 AMAQI
17th Aug 2025522 AMAQI
17th Aug 2025523 AMAQI
17th Aug 2025524 AMAQI

26°C24/29°C

17th Aug 2025515 AMAQI
17th Aug 2025526 AMAQI
17th Aug 2025317 AMAQI
17th Aug 2025398 AMAQI
17th Aug 2025329 AMAQI
17th Aug 20252410 AMAQI
17th Aug 20253311 AMAQI
17th Aug 20253112 PMAQI
17th Aug 2025261 PMAQI
17th Aug 2025262 PMAQI
17th Aug 2025243 PMAQI
17th Aug 2025254 PMAQI
17th Aug 2025275 PMAQI
17th Aug 2025336 PMAQI
17th Aug 2025387 PMAQI
17th Aug 2025408 PMAQI
17th Aug 2025419 PMAQI
17th Aug 20254210 PMAQI
17th Aug 20254811 PMAQI
18th Aug 20255212 AMAQI
18th Aug 2025521 AMAQI
18th Aug 2025522 AMAQI
18th Aug 2025533 AMAQI
18th Aug 2025424 AMAQI

--°C/°C

5 AM
11 AM
6 PM
11 PM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 6 AM

56AQI

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

52AQI

12 hours / Day
360 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 6 AM (Avg. 56), while the lowest AQI was between 7 AM to 6 PM (Avg. 52).
Night time
Avg. Highest Time
12 AM - 11 PM

56AQI

10 hours / Day
300 hours / Month
Avg. Lowest Time
12 AM - 11 PM

56AQI

10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 56), while the lowest AQI was between 12 AM to 11 PM (Avg. 56).

2025 Days Vs Air Quality

Son Tay, Ha Noi, Vietnam

2025

4%

9

68%

156

22%

50

6%

13

Total number of days with different AQI categories in last 229 days in 2025 (136 days remaining)

Good
9 Days
Moderate
156 Days
Poor
50 Days
Unhealthy
13 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 4%

Health Risk Level:

Extreme

In 2025, 4% of 229 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.

1st January 2025
162AQI
2nd January 2025
198AQI
3rd January 2025
164AQI
4th January 2025
145AQI
5th January 2025
144AQI
6th January 2025
151AQI
7th January 2025
155AQI
8th January 2025
147AQI
9th January 2025
152AQI
10th January 2025
103AQI
11th January 2025
115AQI
12th January 2025
121AQI
13th January 2025
144AQI
14th January 2025
144AQI
15th January 2025
146AQI
16th January 2025
143AQI
17th January 2025
148AQI
18th January 2025
159AQI
19th January 2025
152AQI
20th January 2025
168AQI
21st January 2025
148AQI
22nd January 2025
151AQI
23rd January 2025
130AQI
24th January 2025
117AQI
25th January 2025
108AQI
26th January 2025
70AQI
27th January 2025
87AQI
28th January 2025
77AQI
29th January 2025
106AQI
30th January 2025
98AQI
31st January 2025
81AQI
1st February 2025
79AQI
2nd February 2025
69AQI
3rd February 2025
60AQI
4th February 2025
65AQI
5th February 2025
91AQI
6th February 2025
113AQI
7th February 2025
58AQI
8th February 2025
76AQI
9th February 2025
97AQI
10th February 2025
138AQI
11th February 2025
151AQI
12th February 2025
167AQI
13th February 2025
148AQI
14th February 2025
146AQI
15th February 2025
151AQI
16th February 2025
102AQI
17th February 2025
122AQI
18th February 2025
90AQI
19th February 2025
117AQI
20th February 2025
130AQI
21st February 2025
122AQI
22nd February 2025
132AQI
23rd February 2025
80AQI
24th February 2025
84AQI
25th February 2025
93AQI
26th February 2025
86AQI
27th February 2025
136AQI
28th February 2025
108AQI
1st March 2025
111AQI
2nd March 2025
92AQI
3rd March 2025
94AQI
4th March 2025
96AQI
5th March 2025
95AQI
6th March 2025
76AQI
7th March 2025
80AQI
8th March 2025
101AQI
9th March 2025
128AQI
10th March 2025
142AQI
11th March 2025
127AQI
12th March 2025
111AQI
13th March 2025
95AQI
14th March 2025
97AQI
15th March 2025
89AQI
16th March 2025
73AQI
17th March 2025
89AQI
18th March 2025
88AQI
19th March 2025
84AQI
20th March 2025
99AQI
21st March 2025
117AQI
22nd March 2025
118AQI
23rd March 2025
121AQI
24th March 2025
126AQI
25th March 2025
131AQI
26th March 2025
114AQI
27th March 2025
112AQI
28th March 2025
112AQI
29th March 2025
82AQI
30th March 2025
67AQI
31st March 2025
75AQI
1st April 2025
94AQI
2nd April 2025
120AQI
3rd April 2025
110AQI
4th April 2025
133AQI
5th April 2025
106AQI
6th April 2025
123AQI
7th April 2025
111AQI
8th April 2025
114AQI
9th April 2025
93AQI
10th April 2025
98AQI
11th April 2025
97AQI
12th April 2025
102AQI
13th April 2025
83AQI
14th April 2025
93AQI
15th April 2025
98AQI
16th April 2025
100AQI
17th April 2025
98AQI
18th April 2025
100AQI
19th April 2025
95AQI
20th April 2025
81AQI
21st April 2025
82AQI
22nd April 2025
91AQI
23rd April 2025
93AQI
24th April 2025
83AQI
25th April 2025
77AQI
26th April 2025
77AQI
27th April 2025
69AQI
28th April 2025
66AQI
29th April 2025
73AQI
30th April 2025
73AQI
1st May 2025
60AQI
2nd May 2025
74AQI
3rd May 2025
75AQI
4th May 2025
74AQI
5th May 2025
77AQI
6th May 2025
73AQI
7th May 2025
75AQI
8th May 2025
75AQI
9th May 2025
78AQI
10th May 2025
79AQI
11th May 2025
53AQI
12th May 2025
67AQI
13th May 2025
67AQI
14th May 2025
65AQI
15th May 2025
60AQI
16th May 2025
59AQI
17th May 2025
56AQI
18th May 2025
55AQI
19th May 2025
57AQI
20th May 2025
58AQI
21st May 2025
56AQI
22nd May 2025
56AQI
23rd May 2025
56AQI
24th May 2025
54AQI
25th May 2025
55AQI
26th May 2025
60AQI
27th May 2025
83AQI
28th May 2025
81AQI
29th May 2025
64AQI
30th May 2025
63AQI
31st May 2025
59AQI
1st June 2025
54AQI
2nd June 2025
54AQI
3rd June 2025
55AQI
4th June 2025
58AQI
5th June 2025
64AQI
6th June 2025
59AQI
7th June 2025
58AQI
8th June 2025
58AQI
9th June 2025
62AQI
10th June 2025
57AQI
11th June 2025
62AQI
12th June 2025
61AQI
13th June 2025
56AQI
14th June 2025
64AQI
15th June 2025
69AQI
16th June 2025
67AQI
17th June 2025
62AQI
18th June 2025
54AQI
19th June 2025
61AQI
20th June 2025
66AQI
21st June 2025
55AQI
22nd June 2025
54AQI
23rd June 2025
59AQI
24th June 2025
62AQI
25th June 2025
58AQI
26th June 2025
57AQI
27th June 2025
58AQI
28th June 2025
53AQI
29th June 2025
53AQI
30th June 2025
53AQI
1st July 2025
47AQI
2nd July 2025
47AQI
3rd July 2025
53AQI
4th July 2025
58AQI
5th July 2025
60AQI
6th July 2025
58AQI
7th July 2025
61AQI
8th July 2025
58AQI
9th July 2025
61AQI
10th July 2025
54AQI
11th July 2025
54AQI
12th July 2025
53AQI
13th July 2025
54AQI
14th July 2025
61AQI
15th July 2025
67AQI
16th July 2025
58AQI
17th July 2025
57AQI
18th July 2025
58AQI
19th July 2025
63AQI
20th July 2025
58AQI
21st July 2025
57AQI
22nd July 2025
48AQI
23rd July 2025
49AQI
24th July 2025
49AQI
25th July 2025
55AQI
26th July 2025
55AQI
27th July 2025
57AQI
28th July 2025
63AQI
29th July 2025
67AQI
30th July 2025
66AQI
31st July 2025
59AQI
1st August 2025
52AQI
2nd August 2025
54AQI
3rd August 2025
56AQI
4th August 2025
56AQI
5th August 2025
54AQI
6th August 2025
52AQI
7th August 2025
54AQI
8th August 2025
53AQI
9th August 2025
50AQI
10th August 2025
52AQI
11th August 2025
54AQI
12th August 2025
50AQI
13th August 2025
52AQI
14th August 2025
54AQI
15th August 2025
44AQI
16th August 2025
44AQI

133AQI

108AQI

101AQI

94AQI

65AQI

59AQI

57AQI

52AQI


No. of days

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

202586AQI

5
16
10
13
12
3
17
14
22
8
31
30
5
26
4
12
9
156
50
13

Highest AQI recorded in

January

133AQI


Lowest AQI recorded in

August

52AQI


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

December

115AQI


Lowest AQI recorded in

April

2AQI


202334AQI

2
1
25
6
27
7

Highest AQI recorded in

November

43AQI


Lowest AQI recorded in

December

33AQI


20219AQI

2
2
12
16

Highest AQI recorded in

July

9AQI


Lowest AQI recorded in

May

7AQI


Most & Least Polluted Years Over the Last 4 Years

Most Polluted Year Recorded
2025(Avg.)
86AQI
Least Polluted Year Recorded
2021(Avg.)
9AQI


Son Tay's annual 2025 AQI (86) shows an average percentage change of 348.5% (worsened AQI) compared to previous years: 2021 (9), 2023 (34), 2024 (71).