Causeway Bay, Hong Kong Island, Hong Kong, China 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
Causeway Bay, Hong Kong Island, Hong Kong, China
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
12th Sep 2022
135AQILowest AQI recorded on
8th Sep 2023
32AQISame Day Analysis (16th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 44 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Causeway Bay, Hong Kong Island, Hong Kong, China
AQI
Day
Night
.
6 AM17th Sep 2025
6 PM
5 AM18th Sep 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
12PM17th Sep
64AQI
Avg. Lowest Time
8AM17th Sep
30AQI
In the last 24 hours,
Causeway Bay's AQI reached its highest point of 64 at 12 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Causeway Bay, Hong Kong Island, Hong Kong, China
AugSep
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 Aug 2025386 AMAQI
19th Aug 2025387 AMAQI
19th Aug 2025258 AMAQI
19th Aug 2025259 AMAQI
19th Aug 20253410 AMAQI
19th Aug 20252911 AMAQI
19th Aug 20253212 PMAQI
19th Aug 2025361 PMAQI
19th Aug 2025382 PMAQI
19th Aug 2025403 PMAQI
19th Aug 2025484 PMAQI
19th Aug 2025425 PMAQI
19th Aug 2025366 PMAQI
19th Aug 2025407 PMAQI
19th Aug 2025438 PMAQI
19th Aug 2025379 PMAQI
19th Aug 20254410 PMAQI
19th Aug 20254011 PMAQI
20th Aug 20254112 AMAQI
20th Aug 2025401 AMAQI
20th Aug 2025422 AMAQI
20th Aug 2025433 AMAQI
20th Aug 2025404 AMAQI
20th Aug 2025405 AMAQI
27°C27/28°C
20th Aug 2025406 AMAQI
20th Aug 2025417 AMAQI
20th Aug 2025368 AMAQI
20th Aug 2025369 AMAQI
20th Aug 20254410 AMAQI
20th Aug 20254011 AMAQI
20th Aug 20253612 PMAQI
20th Aug 2025361 PMAQI
20th Aug 2025302 PMAQI
20th Aug 2025363 PMAQI
20th Aug 2025314 PMAQI
20th Aug 2025365 PMAQI
20th Aug 2025336 PMAQI
20th Aug 2025377 PMAQI
20th Aug 2025408 PMAQI
20th Aug 2025449 PMAQI
20th Aug 20254010 PMAQI
20th Aug 20253811 PMAQI
21st Aug 20254212 AMAQI
21st Aug 2025411 AMAQI
21st Aug 2025432 AMAQI
21st Aug 2025423 AMAQI
21st Aug 2025394 AMAQI
21st Aug 2025385 AMAQI
28°C27/29°C
21st Aug 2025406 AMAQI
21st Aug 2025407 AMAQI
21st Aug 2025318 AMAQI
21st Aug 2025369 AMAQI
21st Aug 20253510 AMAQI
21st Aug 20253811 AMAQI
21st Aug 20254112 PMAQI
21st Aug 2025361 PMAQI
21st Aug 2025362 PMAQI
21st Aug 2025403 PMAQI
21st Aug 2025364 PMAQI
21st Aug 2025355 PMAQI
21st Aug 2025326 PMAQI
21st Aug 2025417 PMAQI
21st Aug 2025388 PMAQI
21st Aug 2025409 PMAQI
21st Aug 20254110 PMAQI
21st Aug 20253911 PMAQI
22nd Aug 20254312 AMAQI
22nd Aug 2025441 AMAQI
22nd Aug 2025422 AMAQI
22nd Aug 2025423 AMAQI
22nd Aug 2025404 AMAQI
22nd Aug 2025415 AMAQI
28°C27/29°C
22nd Aug 2025406 AMAQI
22nd Aug 2025407 AMAQI
22nd Aug 2025398 AMAQI
22nd Aug 2025309 AMAQI
22nd Aug 20253510 AMAQI
22nd Aug 20254011 AMAQI
22nd Aug 20253912 PMAQI
22nd Aug 2025341 PMAQI
22nd Aug 2025302 PMAQI
22nd Aug 2025363 PMAQI
22nd Aug 2025364 PMAQI
22nd Aug 2025475 PMAQI
22nd Aug 2025416 PMAQI
22nd Aug 2025407 PMAQI
22nd Aug 2025488 PMAQI
22nd Aug 2025469 PMAQI
22nd Aug 20254410 PMAQI
22nd Aug 20254611 PMAQI
23rd Aug 20254312 AMAQI
23rd Aug 2025431 AMAQI
23rd Aug 2025422 AMAQI
23rd Aug 2025423 AMAQI
23rd Aug 2025424 AMAQI
23rd Aug 2025425 AMAQI
29°C28/30°C
23rd Aug 2025426 AMAQI
23rd Aug 2025427 AMAQI
23rd Aug 2025488 AMAQI
23rd Aug 2025499 AMAQI
23rd Aug 20255010 AMAQI
23rd Aug 20255811 AMAQI
23rd Aug 20256012 PMAQI
23rd Aug 2025601 PMAQI
23rd Aug 2025532 PMAQI
23rd Aug 2025443 PMAQI
23rd Aug 2025444 PMAQI
23rd Aug 2025405 PMAQI
23rd Aug 2025366 PMAQI
23rd Aug 2025417 PMAQI
23rd Aug 2025448 PMAQI
23rd Aug 2025489 PMAQI
23rd Aug 20254510 PMAQI
23rd Aug 20254411 PMAQI
24th Aug 20254212 AMAQI
24th Aug 2025421 AMAQI
24th Aug 2025432 AMAQI
24th Aug 2025463 AMAQI
24th Aug 2025474 AMAQI
24th Aug 2025495 AMAQI
29°C28/30°C
24th Aug 2025486 AMAQI
24th Aug 2025487 AMAQI
24th Aug 2025358 AMAQI
24th Aug 2025329 AMAQI
24th Aug 20253410 AMAQI
24th Aug 20254311 AMAQI
24th Aug 20253812 PMAQI
24th Aug 2025401 PMAQI
24th Aug 2025302 PMAQI
24th Aug 2025373 PMAQI
24th Aug 2025364 PMAQI
24th Aug 2025355 PMAQI
24th Aug 2025366 PMAQI
24th Aug 2025417 PMAQI
24th Aug 2025498 PMAQI
24th Aug 2025469 PMAQI
24th Aug 20254510 PMAQI
24th Aug 20254311 PMAQI
25th Aug 20254412 AMAQI
25th Aug 2025461 AMAQI
25th Aug 2025442 AMAQI
25th Aug 2025453 AMAQI
25th Aug 2025434 AMAQI
25th Aug 2025445 AMAQI
28°C27/29°C
25th Aug 2025436 AMAQI
25th Aug 2025427 AMAQI
25th Aug 2025368 AMAQI
25th Aug 2025289 AMAQI
25th Aug 20252910 AMAQI
25th Aug 20253311 AMAQI
25th Aug 20252812 PMAQI
25th Aug 2025391 PMAQI
25th Aug 2025332 PMAQI
25th Aug 2025363 PMAQI
25th Aug 2025404 PMAQI
25th Aug 2025365 PMAQI
25th Aug 2025456 PMAQI
25th Aug 2025397 PMAQI
25th Aug 2025448 PMAQI
25th Aug 2025399 PMAQI
25th Aug 20253610 PMAQI
25th Aug 20253911 PMAQI
26th Aug 20253912 AMAQI
26th Aug 2025471 AMAQI
26th Aug 2025452 AMAQI
26th Aug 2025433 AMAQI
26th Aug 2025424 AMAQI
26th Aug 2025435 AMAQI
28°C28/29°C
26th Aug 2025446 AMAQI
26th Aug 2025457 AMAQI
26th Aug 2025308 AMAQI
26th Aug 2025389 AMAQI
26th Aug 20253810 AMAQI
26th Aug 20253711 AMAQI
26th Aug 20253912 PMAQI
26th Aug 2025361 PMAQI
26th Aug 2025432 PMAQI
26th Aug 2025403 PMAQI
26th Aug 2025414 PMAQI
26th Aug 2025415 PMAQI
26th Aug 2025396 PMAQI
26th Aug 2025517 PMAQI
26th Aug 2025488 PMAQI
26th Aug 2025529 PMAQI
26th Aug 20254910 PMAQI
26th Aug 20254511 PMAQI
27th Aug 20255212 AMAQI
27th Aug 2025441 AMAQI
27th Aug 2025442 AMAQI
27th Aug 2025433 AMAQI
27th Aug 2025424 AMAQI
27th Aug 2025435 AMAQI
28°C28/29°C
27th Aug 2025426 AMAQI
27th Aug 2025427 AMAQI
27th Aug 2025398 AMAQI
27th Aug 2025409 AMAQI
27th Aug 20255010 AMAQI
27th Aug 20254311 AMAQI
27th Aug 20254412 PMAQI
27th Aug 2025311 PMAQI
27th Aug 2025492 PMAQI
27th Aug 2025493 PMAQI
27th Aug 2025524 PMAQI
27th Aug 2025495 PMAQI
27th Aug 2025416 PMAQI
27th Aug 2025407 PMAQI
27th Aug 2025478 PMAQI
27th Aug 2025489 PMAQI
27th Aug 20254610 PMAQI
27th Aug 20254811 PMAQI
28th Aug 20254612 AMAQI
28th Aug 2025441 AMAQI
28th Aug 2025442 AMAQI
28th Aug 2025453 AMAQI
28th Aug 2025454 AMAQI
28th Aug 2025455 AMAQI
28°C27/29°C
28th Aug 2025466 AMAQI
28th Aug 2025457 AMAQI
28th Aug 2025508 AMAQI
28th Aug 2025539 AMAQI
28th Aug 20255610 AMAQI
28th Aug 20255211 AMAQI
28th Aug 20255212 PMAQI
28th Aug 2025491 PMAQI
28th Aug 2025562 PMAQI
28th Aug 2025553 PMAQI
28th Aug 2025564 PMAQI
28th Aug 2025565 PMAQI
28th Aug 2025576 PMAQI
28th Aug 2025527 PMAQI
28th Aug 2025518 PMAQI
28th Aug 2025499 PMAQI
28th Aug 20254910 PMAQI
28th Aug 20255011 PMAQI
29th Aug 20254312 AMAQI
29th Aug 2025481 AMAQI
29th Aug 2025482 AMAQI
29th Aug 2025503 AMAQI
29th Aug 2025504 AMAQI
29th Aug 2025505 AMAQI
28°C27/29°C
29th Aug 2025516 AMAQI
29th Aug 2025507 AMAQI
29th Aug 2025338 AMAQI
29th Aug 2025359 AMAQI
29th Aug 20254010 AMAQI
29th Aug 20254611 AMAQI
29th Aug 20254112 PMAQI
29th Aug 2025431 PMAQI
29th Aug 2025502 PMAQI
29th Aug 2025453 PMAQI
29th Aug 2025474 PMAQI
29th Aug 2025445 PMAQI
29th Aug 2025436 PMAQI
29th Aug 2025497 PMAQI
29th Aug 2025508 PMAQI
29th Aug 2025529 PMAQI
29th Aug 20255010 PMAQI
29th Aug 20255111 PMAQI
30th Aug 20254812 AMAQI
30th Aug 2025491 AMAQI
30th Aug 2025512 AMAQI
30th Aug 2025513 AMAQI
30th Aug 2025494 AMAQI
30th Aug 2025505 AMAQI
28°C28/30°C
30th Aug 2025476 AMAQI
30th Aug 2025487 AMAQI
30th Aug 2025428 AMAQI
30th Aug 2025469 AMAQI
30th Aug 20254610 AMAQI
30th Aug 20254011 AMAQI
30th Aug 20254512 PMAQI
30th Aug 2025371 PMAQI
30th Aug 2025382 PMAQI
30th Aug 2025363 PMAQI
30th Aug 2025384 PMAQI
30th Aug 2025385 PMAQI
30th Aug 2025396 PMAQI
30th Aug 2025477 PMAQI
30th Aug 2025478 PMAQI
30th Aug 2025489 PMAQI
30th Aug 20254310 PMAQI
30th Aug 20254211 PMAQI
31st Aug 20254212 AMAQI
31st Aug 2025501 AMAQI
31st Aug 2025522 AMAQI
31st Aug 2025473 AMAQI
31st Aug 2025464 AMAQI
31st Aug 2025505 AMAQI
28°C27/29°C
31st Aug 2025486 AMAQI
31st Aug 2025497 AMAQI
31st Aug 2025328 AMAQI
31st Aug 2025349 AMAQI
31st Aug 20253410 AMAQI
31st Aug 20253111 AMAQI
31st Aug 20253712 PMAQI
31st Aug 2025281 PMAQI
31st Aug 2025382 PMAQI
31st Aug 2025413 PMAQI
31st Aug 2025474 PMAQI
31st Aug 2025415 PMAQI
31st Aug 2025476 PMAQI
31st Aug 2025527 PMAQI
31st Aug 2025438 PMAQI
31st Aug 2025459 PMAQI
31st Aug 20254310 PMAQI
31st Aug 20254711 PMAQI
1st Sep 20253912 AMAQI
1st Sep 2025451 AMAQI
1st Sep 2025482 AMAQI
1st Sep 2025483 AMAQI
1st Sep 2025484 AMAQI
1st Sep 2025485 AMAQI
28°C28/29°C
1st Sep 2025496 AMAQI
1st Sep 2025497 AMAQI
1st Sep 2025288 AMAQI
1st Sep 2025329 AMAQI
1st Sep 20253610 AMAQI
1st Sep 20253811 AMAQI
1st Sep 20253512 PMAQI
1st Sep 2025401 PMAQI
1st Sep 2025312 PMAQI
1st Sep 2025373 PMAQI
1st Sep 2025344 PMAQI
1st Sep 2025415 PMAQI
1st Sep 2025366 PMAQI
1st Sep 2025437 PMAQI
1st Sep 2025438 PMAQI
1st Sep 2025419 PMAQI
1st Sep 20254510 PMAQI
1st Sep 20254711 PMAQI
2nd Sep 20254712 AMAQI
2nd Sep 2025481 AMAQI
2nd Sep 2025442 AMAQI
2nd Sep 2025483 AMAQI
2nd Sep 2025454 AMAQI
2nd Sep 2025455 AMAQI
28°C27/29°C
2nd Sep 2025466 AMAQI
2nd Sep 2025457 AMAQI
2nd Sep 2025288 AMAQI
2nd Sep 2025329 AMAQI
2nd Sep 20253410 AMAQI
2nd Sep 20252711 AMAQI
2nd Sep 20252212 PMAQI
2nd Sep 2025351 PMAQI
2nd Sep 2025372 PMAQI
2nd Sep 2025253 PMAQI
2nd Sep 2025354 PMAQI
2nd Sep 2025305 PMAQI
2nd Sep 2025296 PMAQI
2nd Sep 2025407 PMAQI
2nd Sep 2025458 PMAQI
2nd Sep 2025489 PMAQI
2nd Sep 20254510 PMAQI
2nd Sep 20255111 PMAQI
3rd Sep 20254612 AMAQI
3rd Sep 2025471 AMAQI
3rd Sep 2025502 AMAQI
3rd Sep 2025463 AMAQI
3rd Sep 2025444 AMAQI
3rd Sep 2025445 AMAQI
28°C28/29°C
3rd Sep 2025456 AMAQI
3rd Sep 2025427 AMAQI
3rd Sep 2025338 AMAQI
3rd Sep 2025369 AMAQI
3rd Sep 20253610 AMAQI
3rd Sep 20254511 AMAQI
3rd Sep 20254312 PMAQI
3rd Sep 2025391 PMAQI
3rd Sep 2025422 PMAQI
3rd Sep 2025343 PMAQI
3rd Sep 2025354 PMAQI
3rd Sep 2025295 PMAQI
3rd Sep 2025376 PMAQI
3rd Sep 2025387 PMAQI
3rd Sep 2025428 PMAQI
3rd Sep 2025489 PMAQI
3rd Sep 20254810 PMAQI
3rd Sep 20253911 PMAQI
4th Sep 20254312 AMAQI
4th Sep 2025501 AMAQI
4th Sep 2025482 AMAQI
4th Sep 2025473 AMAQI
4th Sep 2025454 AMAQI
4th Sep 2025455 AMAQI
29°C27/30°C
4th Sep 2025456 AMAQI
4th Sep 2025447 AMAQI
4th Sep 2025488 AMAQI
4th Sep 2025449 AMAQI
4th Sep 20253910 AMAQI
4th Sep 20254111 AMAQI
4th Sep 20253412 PMAQI
4th Sep 2025381 PMAQI
4th Sep 2025362 PMAQI
4th Sep 2025343 PMAQI
4th Sep 2025484 PMAQI
4th Sep 2025515 PMAQI
4th Sep 2025546 PMAQI
4th Sep 2025607 PMAQI
4th Sep 2025628 PMAQI
4th Sep 2025589 PMAQI
4th Sep 20255610 PMAQI
4th Sep 20256311 PMAQI
5th Sep 20256912 AMAQI
5th Sep 2025471 AMAQI
5th Sep 2025462 AMAQI
5th Sep 2025443 AMAQI
5th Sep 2025444 AMAQI
5th Sep 2025455 AMAQI
29°C28/30°C
5th Sep 2025446 AMAQI
5th Sep 2025447 AMAQI
5th Sep 2025378 AMAQI
5th Sep 2025419 AMAQI
5th Sep 20252710 AMAQI
5th Sep 20252711 AMAQI
5th Sep 20253512 PMAQI
5th Sep 2025331 PMAQI
5th Sep 2025332 PMAQI
5th Sep 2025293 PMAQI
5th Sep 2025294 PMAQI
5th Sep 2025345 PMAQI
5th Sep 2025326 PMAQI
5th Sep 2025447 PMAQI
5th Sep 2025428 PMAQI
5th Sep 2025449 PMAQI
5th Sep 20255010 PMAQI
5th Sep 20253611 PMAQI
6th Sep 20253412 AMAQI
6th Sep 2025411 AMAQI
6th Sep 2025422 AMAQI
6th Sep 2025383 AMAQI
6th Sep 2025414 AMAQI
6th Sep 2025395 AMAQI
29°C28/30°C
6th Sep 2025376 AMAQI
6th Sep 2025387 AMAQI
6th Sep 2025328 AMAQI
6th Sep 2025429 AMAQI
6th Sep 20253410 AMAQI
6th Sep 20254411 AMAQI
6th Sep 20254612 PMAQI
6th Sep 2025501 PMAQI
6th Sep 2025372 PMAQI
6th Sep 2025443 PMAQI
6th Sep 2025504 PMAQI
6th Sep 2025545 PMAQI
6th Sep 2025546 PMAQI
6th Sep 2025527 PMAQI
6th Sep 2025538 PMAQI
6th Sep 2025549 PMAQI
6th Sep 20255110 PMAQI
6th Sep 20254811 PMAQI
7th Sep 20255012 AMAQI
7th Sep 2025391 AMAQI
7th Sep 2025382 AMAQI
7th Sep 2025453 AMAQI
7th Sep 2025404 AMAQI
7th Sep 2025415 AMAQI
29°C29/30°C
7th Sep 2025426 AMAQI
7th Sep 2025417 AMAQI
7th Sep 2025388 AMAQI
7th Sep 2025519 AMAQI
7th Sep 20253710 AMAQI
7th Sep 20253611 AMAQI
7th Sep 20254012 PMAQI
7th Sep 2025431 PMAQI
7th Sep 2025412 PMAQI
7th Sep 2025453 PMAQI
7th Sep 2025384 PMAQI
7th Sep 2025375 PMAQI
7th Sep 2025466 PMAQI
7th Sep 2025467 PMAQI
7th Sep 2025468 PMAQI
7th Sep 2025389 PMAQI
7th Sep 20254010 PMAQI
7th Sep 20253511 PMAQI
8th Sep 20253812 AMAQI
8th Sep 2025421 AMAQI
8th Sep 2025402 AMAQI
8th Sep 2025393 AMAQI
8th Sep 2025404 AMAQI
8th Sep 2025405 AMAQI
28°C26/29°C
8th Sep 2025406 AMAQI
8th Sep 2025387 AMAQI
8th Sep 2025218 AMAQI
8th Sep 2025249 AMAQI
8th Sep 20252410 AMAQI
8th Sep 20252211 AMAQI
8th Sep 20252012 PMAQI
8th Sep 2025231 PMAQI
8th Sep 2025242 PMAQI
8th Sep 2025223 PMAQI
8th Sep 2025244 PMAQI
8th Sep 2025245 PMAQI
8th Sep 2025256 PMAQI
8th Sep 2025347 PMAQI
8th Sep 2025448 PMAQI
8th Sep 2025449 PMAQI
8th Sep 20255010 PMAQI
8th Sep 20254011 PMAQI
9th Sep 20253712 AMAQI
9th Sep 2025431 AMAQI
9th Sep 2025422 AMAQI
9th Sep 2025393 AMAQI
9th Sep 2025414 AMAQI
9th Sep 2025385 AMAQI
28°C27/28°C
9th Sep 2025376 AMAQI
9th Sep 2025407 AMAQI
9th Sep 2025308 AMAQI
9th Sep 2025329 AMAQI
9th Sep 20253410 AMAQI
9th Sep 20253411 AMAQI
9th Sep 20253512 PMAQI
9th Sep 2025341 PMAQI
9th Sep 2025312 PMAQI
9th Sep 2025293 PMAQI
9th Sep 2025384 PMAQI
9th Sep 2025365 PMAQI
9th Sep 2025356 PMAQI
9th Sep 2025427 PMAQI
9th Sep 2025468 PMAQI
9th Sep 2025409 PMAQI
9th Sep 20254110 PMAQI
9th Sep 20253811 PMAQI
10th Sep 20254012 AMAQI
10th Sep 2025421 AMAQI
10th Sep 2025412 AMAQI
10th Sep 2025423 AMAQI
10th Sep 2025384 AMAQI
10th Sep 2025395 AMAQI
28°C28/28°C
10th Sep 2025386 AMAQI
10th Sep 2025387 AMAQI
10th Sep 2025288 AMAQI
10th Sep 2025339 AMAQI
10th Sep 20253810 AMAQI
10th Sep 20254111 AMAQI
10th Sep 20253412 PMAQI
10th Sep 2025341 PMAQI
10th Sep 2025352 PMAQI
10th Sep 2025303 PMAQI
10th Sep 2025284 PMAQI
10th Sep 2025335 PMAQI
10th Sep 2025276 PMAQI
10th Sep 2025377 PMAQI
10th Sep 2025398 PMAQI
10th Sep 2025389 PMAQI
10th Sep 20254010 PMAQI
10th Sep 20253511 PMAQI
11th Sep 20254212 AMAQI
11th Sep 2025401 AMAQI
11th Sep 2025422 AMAQI
11th Sep 2025403 AMAQI
11th Sep 2025394 AMAQI
11th Sep 2025375 AMAQI
28°C28/29°C
11th Sep 2025386 AMAQI
11th Sep 2025387 AMAQI
11th Sep 2025308 AMAQI
11th Sep 2025369 AMAQI
11th Sep 20253610 AMAQI
11th Sep 20253411 AMAQI
11th Sep 20253612 PMAQI
11th Sep 2025341 PMAQI
11th Sep 2025342 PMAQI
11th Sep 2025313 PMAQI
11th Sep 2025334 PMAQI
11th Sep 2025345 PMAQI
11th Sep 2025366 PMAQI
11th Sep 2025377 PMAQI
11th Sep 2025388 PMAQI
11th Sep 2025389 PMAQI
11th Sep 20253810 PMAQI
11th Sep 20253611 PMAQI
12th Sep 20253612 AMAQI
12th Sep 2025421 AMAQI
12th Sep 2025422 AMAQI
12th Sep 2025393 AMAQI
12th Sep 2025404 AMAQI
12th Sep 2025405 AMAQI
28°C28/29°C
12th Sep 2025396 AMAQI
12th Sep 2025387 AMAQI
12th Sep 2025328 AMAQI
12th Sep 2025369 AMAQI
12th Sep 20254110 AMAQI
12th Sep 20254111 AMAQI
12th Sep 20254012 PMAQI
12th Sep 2025441 PMAQI
12th Sep 2025382 PMAQI
12th Sep 2025393 PMAQI
12th Sep 2025414 PMAQI
12th Sep 2025415 PMAQI
12th Sep 2025406 PMAQI
12th Sep 2025367 PMAQI
12th Sep 2025428 PMAQI
12th Sep 2025419 PMAQI
12th Sep 20253410 PMAQI
12th Sep 20253611 PMAQI
13th Sep 20254012 AMAQI
13th Sep 2025441 AMAQI
13th Sep 2025392 AMAQI
13th Sep 2025393 AMAQI
13th Sep 2025404 AMAQI
13th Sep 2025395 AMAQI
29°C28/30°C
13th Sep 2025396 AMAQI
13th Sep 2025397 AMAQI
13th Sep 2025238 AMAQI
13th Sep 2025319 AMAQI
13th Sep 20253110 AMAQI
13th Sep 20253411 AMAQI
13th Sep 20253612 PMAQI
13th Sep 2025361 PMAQI
13th Sep 2025372 PMAQI
13th Sep 2025393 PMAQI
13th Sep 2025304 PMAQI
13th Sep 2025305 PMAQI
13th Sep 2025396 PMAQI
13th Sep 2025467 PMAQI
13th Sep 2025428 PMAQI
13th Sep 2025409 PMAQI
13th Sep 20254210 PMAQI
13th Sep 20253611 PMAQI
14th Sep 20253812 AMAQI
14th Sep 2025401 AMAQI
14th Sep 2025412 AMAQI
14th Sep 2025383 AMAQI
14th Sep 2025374 AMAQI
14th Sep 2025375 AMAQI
29°C28/30°C
14th Sep 2025366 AMAQI
14th Sep 2025387 AMAQI
14th Sep 2025308 AMAQI
14th Sep 2025329 AMAQI
14th Sep 20253510 AMAQI
14th Sep 20253811 AMAQI
14th Sep 20253012 PMAQI
14th Sep 2025361 PMAQI
14th Sep 2025332 PMAQI
14th Sep 2025243 PMAQI
14th Sep 2025274 PMAQI
14th Sep 2025385 PMAQI
14th Sep 2025316 PMAQI
14th Sep 2025347 PMAQI
14th Sep 2025398 PMAQI
14th Sep 2025429 PMAQI
14th Sep 20253310 PMAQI
14th Sep 20253811 PMAQI
15th Sep 20253612 AMAQI
15th Sep 2025401 AMAQI
15th Sep 2025412 AMAQI
15th Sep 2025383 AMAQI
15th Sep 2025384 AMAQI
15th Sep 2025385 AMAQI
29°C28/29°C
15th Sep 2025386 AMAQI
15th Sep 2025387 AMAQI
15th Sep 2025298 AMAQI
15th Sep 2025349 AMAQI
15th Sep 20254210 AMAQI
15th Sep 20254111 AMAQI
15th Sep 20252412 PMAQI
15th Sep 2025391 PMAQI
15th Sep 2025382 PMAQI
15th Sep 2025493 PMAQI
15th Sep 2025464 PMAQI
15th Sep 2025495 PMAQI
15th Sep 2025366 PMAQI
15th Sep 2025427 PMAQI
15th Sep 2025398 PMAQI
15th Sep 2025449 PMAQI
15th Sep 20253610 PMAQI
15th Sep 20253511 PMAQI
16th Sep 20253712 AMAQI
16th Sep 2025401 AMAQI
16th Sep 2025382 AMAQI
16th Sep 2025383 AMAQI
16th Sep 2025384 AMAQI
16th Sep 2025385 AMAQI
29°C28/30°C
16th Sep 2025386 AMAQI
16th Sep 2025387 AMAQI
16th Sep 2025278 AMAQI
16th Sep 2025439 AMAQI
16th Sep 20254610 AMAQI
16th Sep 20255311 AMAQI
16th Sep 20255312 PMAQI
16th Sep 2025391 PMAQI
16th Sep 2025562 PMAQI
16th Sep 2025503 PMAQI
16th Sep 2025484 PMAQI
16th Sep 2025485 PMAQI
16th Sep 2025476 PMAQI
16th Sep 2025487 PMAQI
16th Sep 2025548 PMAQI
16th Sep 2025499 PMAQI
16th Sep 20255510 PMAQI
16th Sep 20255411 PMAQI
17th Sep 20254512 AMAQI
17th Sep 2025381 AMAQI
17th Sep 2025382 AMAQI
17th Sep 2025403 AMAQI
17th Sep 2025404 AMAQI
17th Sep 2025405 AMAQI
29°C28/30°C
17th Sep 2025396 AMAQI
17th Sep 2025407 AMAQI
17th Sep 2025308 AMAQI
17th Sep 2025369 AMAQI
17th Sep 20255810 AMAQI
17th Sep 20255811 AMAQI
17th Sep 20256412 PMAQI
17th Sep 2025491 PMAQI
17th Sep 2025542 PMAQI
17th Sep 2025563 PMAQI
17th Sep 2025534 PMAQI
17th Sep 2025395 PMAQI
17th Sep 2025376 PMAQI
17th Sep 2025427 PMAQI
17th Sep 2025498 PMAQI
17th Sep 2025569 PMAQI
17th Sep 20255110 PMAQI
17th Sep 20254511 PMAQI
18th Sep 20254412 AMAQI
18th Sep 2025421 AMAQI
18th Sep 2025402 AMAQI
18th Sep 2025403 AMAQI
--°C/°C
6 AM
12 PM
6 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 7 AM
42AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
8 AM
33AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 42), while the lowest AQI was between 8 AM to 8 AM (Avg. 33).
Night time
Avg. Highest Time
8 PM - 11 PM
44AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
12 AM - 7 PM
43AQI
7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 11 PM (Avg. 44), while the lowest AQI was between 12 AM to 7 PM (Avg. 43).
2025 Days Vs Air Quality
Causeway Bay, Hong Kong Island, Hong Kong, China
2025
25%
66
68%
176
7%
17
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Good
66 DaysModerate
176 DaysPoor
17 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 25%
Health Risk Level:
Very high
In 2025, 25% of 260 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Causeway Bay, Hong Kong Island, Hong Kong, China
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
117AQI
117AQI
2nd January 2025
145AQI
145AQI
3rd January 2025
112AQI
112AQI
4th January 2025
114AQI
114AQI
5th January 2025
110AQI
110AQI
6th January 2025
110AQI
110AQI
7th January 2025
98AQI
98AQI
8th January 2025
108AQI
108AQI
9th January 2025
113AQI
113AQI
10th January 2025
91AQI
91AQI
11th January 2025
102AQI
102AQI
12th January 2025
77AQI
77AQI
13th January 2025
82AQI
82AQI
14th January 2025
76AQI
76AQI
15th January 2025
87AQI
87AQI
16th January 2025
118AQI
118AQI
17th January 2025
95AQI
95AQI
18th January 2025
107AQI
107AQI
19th January 2025
100AQI
100AQI
20th January 2025
98AQI
98AQI
21st January 2025
92AQI
92AQI
22nd January 2025
94AQI
94AQI
23rd January 2025
84AQI
84AQI
24th January 2025
73AQI
73AQI
25th January 2025
67AQI
67AQI
26th January 2025
59AQI
59AQI
27th January 2025
63AQI
63AQI
28th January 2025
62AQI
62AQI
29th January 2025
88AQI
88AQI
30th January 2025
65AQI
65AQI
31st January 2025
68AQI
68AQI
1st February 2025
59AQI
59AQI
2nd February 2025
64AQI
64AQI
3rd February 2025
49AQI
49AQI
4th February 2025
57AQI
57AQI
5th February 2025
79AQI
79AQI
6th February 2025
69AQI
69AQI
7th February 2025
67AQI
67AQI
8th February 2025
70AQI
70AQI
9th February 2025
61AQI
61AQI
10th February 2025
65AQI
65AQI
11th February 2025
64AQI
64AQI
12th February 2025
64AQI
64AQI
13th February 2025
91AQI
91AQI
14th February 2025
90AQI
90AQI
15th February 2025
85AQI
85AQI
16th February 2025
127AQI
127AQI
17th February 2025
95AQI
95AQI
18th February 2025
130AQI
130AQI
19th February 2025
80AQI
80AQI
20th February 2025
93AQI
93AQI
21st February 2025
86AQI
86AQI
22nd February 2025
79AQI
79AQI
23rd February 2025
63AQI
63AQI
24th February 2025
63AQI
63AQI
25th February 2025
91AQI
91AQI
26th February 2025
98AQI
98AQI
27th February 2025
82AQI
82AQI
28th February 2025
80AQI
80AQI
1st March 2025
79AQI
79AQI
2nd March 2025
73AQI
73AQI
3rd March 2025
70AQI
70AQI
4th March 2025
67AQI
67AQI
5th March 2025
56AQI
56AQI
6th March 2025
52AQI
52AQI
7th March 2025
59AQI
59AQI
8th March 2025
68AQI
68AQI
9th March 2025
66AQI
66AQI
10th March 2025
72AQI
72AQI
11th March 2025
72AQI
72AQI
12th March 2025
70AQI
70AQI
13th March 2025
81AQI
81AQI
14th March 2025
70AQI
70AQI
15th March 2025
63AQI
63AQI
16th March 2025
50AQI
50AQI
17th March 2025
76AQI
76AQI
18th March 2025
71AQI
71AQI
19th March 2025
78AQI
78AQI
20th March 2025
81AQI
81AQI
21st March 2025
83AQI
83AQI
22nd March 2025
79AQI
79AQI
23rd March 2025
82AQI
82AQI
24th March 2025
86AQI
86AQI
25th March 2025
80AQI
80AQI
26th March 2025
68AQI
68AQI
27th March 2025
68AQI
68AQI
28th March 2025
74AQI
74AQI
29th March 2025
55AQI
55AQI
30th March 2025
51AQI
51AQI
31st March 2025
51AQI
51AQI
1st April 2025
58AQI
58AQI
2nd April 2025
58AQI
58AQI
3rd April 2025
65AQI
65AQI
4th April 2025
67AQI
67AQI
5th April 2025
70AQI
70AQI
6th April 2025
80AQI
80AQI
7th April 2025
80AQI
80AQI
8th April 2025
88AQI
88AQI
9th April 2025
78AQI
78AQI
10th April 2025
75AQI
75AQI
11th April 2025
69AQI
69AQI
12th April 2025
68AQI
68AQI
13th April 2025
128AQI
128AQI
14th April 2025
134AQI
134AQI
15th April 2025
134AQI
134AQI
16th April 2025
107AQI
107AQI
17th April 2025
93AQI
93AQI
18th April 2025
81AQI
81AQI
19th April 2025
73AQI
73AQI
20th April 2025
68AQI
68AQI
21st April 2025
63AQI
63AQI
22nd April 2025
67AQI
67AQI
23rd April 2025
60AQI
60AQI
24th April 2025
58AQI
58AQI
25th April 2025
65AQI
65AQI
26th April 2025
58AQI
58AQI
27th April 2025
70AQI
70AQI
28th April 2025
83AQI
83AQI
29th April 2025
70AQI
70AQI
30th April 2025
80AQI
80AQI
1st May 2025
76AQI
76AQI
2nd May 2025
85AQI
85AQI
3rd May 2025
90AQI
90AQI
4th May 2025
71AQI
71AQI
5th May 2025
66AQI
66AQI
6th May 2025
60AQI
60AQI
7th May 2025
60AQI
60AQI
8th May 2025
68AQI
68AQI
9th May 2025
60AQI
60AQI
10th May 2025
71AQI
71AQI
11th May 2025
63AQI
63AQI
12th May 2025
66AQI
66AQI
13th May 2025
70AQI
70AQI
14th May 2025
64AQI
64AQI
15th May 2025
59AQI
59AQI
16th May 2025
55AQI
55AQI
17th May 2025
50AQI
50AQI
18th May 2025
51AQI
51AQI
19th May 2025
53AQI
53AQI
20th May 2025
51AQI
51AQI
21st May 2025
54AQI
54AQI
22nd May 2025
48AQI
48AQI
23rd May 2025
52AQI
52AQI
24th May 2025
55AQI
55AQI
25th May 2025
74AQI
74AQI
26th May 2025
71AQI
71AQI
27th May 2025
77AQI
77AQI
28th May 2025
67AQI
67AQI
29th May 2025
65AQI
65AQI
30th May 2025
55AQI
55AQI
31st May 2025
67AQI
67AQI
1st June 2025
69AQI
69AQI
2nd June 2025
62AQI
62AQI
3rd June 2025
69AQI
69AQI
4th June 2025
55AQI
55AQI
5th June 2025
62AQI
62AQI
6th June 2025
60AQI
60AQI
7th June 2025
56AQI
56AQI
8th June 2025
53AQI
53AQI
9th June 2025
55AQI
55AQI
10th June 2025
48AQI
48AQI
11th June 2025
44AQI
44AQI
12th June 2025
47AQI
47AQI
13th June 2025
49AQI
49AQI
14th June 2025
51AQI
51AQI
15th June 2025
48AQI
48AQI
16th June 2025
51AQI
51AQI
17th June 2025
50AQI
50AQI
18th June 2025
50AQI
50AQI
19th June 2025
48AQI
48AQI
20th June 2025
44AQI
44AQI
21st June 2025
38AQI
38AQI
22nd June 2025
33AQI
33AQI
23rd June 2025
38AQI
38AQI
24th June 2025
39AQI
39AQI
25th June 2025
42AQI
42AQI
26th June 2025
41AQI
41AQI
27th June 2025
44AQI
44AQI
28th June 2025
42AQI
42AQI
29th June 2025
42AQI
42AQI
30th June 2025
38AQI
38AQI
1st July 2025
40AQI
40AQI
2nd July 2025
42AQI
42AQI
3rd July 2025
45AQI
45AQI
4th July 2025
51AQI
51AQI
5th July 2025
54AQI
54AQI
6th July 2025
53AQI
53AQI
7th July 2025
58AQI
58AQI
8th July 2025
48AQI
48AQI
9th July 2025
54AQI
54AQI
10th July 2025
56AQI
56AQI
11th July 2025
56AQI
56AQI
12th July 2025
55AQI
55AQI
13th July 2025
55AQI
55AQI
14th July 2025
56AQI
56AQI
15th July 2025
55AQI
55AQI
16th July 2025
55AQI
55AQI
17th July 2025
60AQI
60AQI
18th July 2025
63AQI
63AQI
19th July 2025
68AQI
68AQI
20th July 2025
42AQI
42AQI
21st July 2025
56AQI
56AQI
22nd July 2025
55AQI
55AQI
23rd July 2025
54AQI
54AQI
24th July 2025
62AQI
62AQI
25th July 2025
66AQI
66AQI
26th July 2025
68AQI
68AQI
27th July 2025
61AQI
61AQI
28th July 2025
63AQI
63AQI
29th July 2025
59AQI
59AQI
30th July 2025
67AQI
67AQI
31st July 2025
57AQI
57AQI
1st August 2025
55AQI
55AQI
2nd August 2025
53AQI
53AQI
3rd August 2025
54AQI
54AQI
4th August 2025
54AQI
54AQI
5th August 2025
49AQI
49AQI
6th August 2025
45AQI
45AQI
7th August 2025
56AQI
56AQI
8th August 2025
60AQI
60AQI
9th August 2025
61AQI
61AQI
10th August 2025
52AQI
52AQI
11th August 2025
49AQI
49AQI
12th August 2025
48AQI
48AQI
13th August 2025
51AQI
51AQI
14th August 2025
43AQI
43AQI
15th August 2025
38AQI
38AQI
16th August 2025
40AQI
40AQI
17th August 2025
36AQI
36AQI
18th August 2025
34AQI
34AQI
19th August 2025
38AQI
38AQI
20th August 2025
39AQI
39AQI
21st August 2025
39AQI
39AQI
22nd August 2025
41AQI
41AQI
23rd August 2025
45AQI
45AQI
24th August 2025
42AQI
42AQI
25th August 2025
39AQI
39AQI
26th August 2025
43AQI
43AQI
27th August 2025
44AQI
44AQI
28th August 2025
50AQI
50AQI
29th August 2025
47AQI
47AQI
30th August 2025
45AQI
45AQI
31st August 2025
43AQI
43AQI
1st September 2025
42AQI
42AQI
2nd September 2025
40AQI
40AQI
3rd September 2025
42AQI
42AQI
4th September 2025
50AQI
50AQI
5th September 2025
49AQI
49AQI
6th September 2025
45AQI
45AQI
7th September 2025
41AQI
41AQI
8th September 2025
34AQI
34AQI
9th September 2025
38AQI
38AQI
10th September 2025
36AQI
36AQI
11th September 2025
37AQI
37AQI
12th September 2025
39AQI
39AQI
13th September 2025
38AQI
38AQI
14th September 2025
36AQI
36AQI
15th September 2025
39AQI
39AQI
16th September 2025
44AQI
44AQI
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
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
93AQI
79AQI
69AQI
78AQI
64AQI
49AQI
56AQI
46AQI
41AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202565AQI
20
11
1
25
2
1
30
26
4
2
29
19
11
5
26
22
9
16
66
176
17
Highest AQI recorded in
January93AQI
Lowest AQI recorded in
September41AQI
202470AQI
17
14
1
28
1
22
8
2
27
1
31
28
1
29
2
4
27
2
26
2
31
3
27
16
15
70
255
40
Highest AQI recorded in
December99AQI
Lowest AQI recorded in
July30AQI
202374AQI
2
27
2
22
6
25
6
28
2
27
4
7
22
1
11
19
1
2
29
6
23
1
4
24
3
26
3
25
6
32
297
35
Highest AQI recorded in
December90AQI
Lowest AQI recorded in
July56AQI
202269AQI
2
19
10
7
13
1
6
18
7
1
28
1
9
22
16
14
14
8
1
1
18
9
1
30
3
27
2
24
5
62
221
34
Highest AQI recorded in
August141AQI
Lowest AQI recorded in
July49AQI
202173AQI
21
9
1
2
26
26
5
28
2
9
22
7
22
1
12
18
1
6
25
5
23
2
7
21
3
1
28
1
1
19
10
1
50
279
34
2
Highest AQI recorded in
January98AQI
Lowest AQI recorded in
July59AQI
202068AQI
12
1
1
20
2
16
25
5
24
7
18
11
2
1
25
4
30
1
1
23
6
16
15
72
165
29
Highest AQI recorded in
December99AQI
Lowest AQI recorded in
July44AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
74AQILeast Polluted Year Recorded
2025(Avg.)
65AQICauseway Bay's annual 2025 AQI (65) shows an average percentage change of -8.3% (improved AQI) compared to previous years: 2020 (68), 2021 (73), 2022 (69), 2023 (74), 2024 (70).
