Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Hilsea, Portsmouth, United Kingdom 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

Hilsea, Portsmouth, United Kingdom

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
19th Aug 2024
98AQI
Lowest AQI recorded on
8th Aug 2023
20AQI

Same Day Analysis (18th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 28 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 17th Aug - 18th Aug 2026

Hilsea, Portsmouth, United Kingdom

AQI
Day
Night
.

5 AM17th Aug 2026

8 PM

4 AM18th Aug 2026

Day time
Avg. Highest Time
2PM17th Aug

38AQI

Avg. Lowest Time
5AM17th Aug

23AQI

Night time
Avg. Highest Time
9PM17th Aug

36AQI

Avg. Lowest Time
3AM18th Aug

21AQI

In the last 24 hours,

Hilsea's AQI reached its highest point of 38 at 2 PM during the Day, while the lowest point, 21, was recorded at 3 AM during the Night between 17th Aug and 18th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Hilsea, Portsmouth, United Kingdom

JulAug
20th - 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
20th Jul 2026215 AMAQI
20th Jul 2026216 AMAQI
20th Jul 2026237 AMAQI
20th Jul 2026218 AMAQI
20th Jul 2026239 AMAQI
20th Jul 20262910 AMAQI
20th Jul 20262911 AMAQI
20th Jul 20262512 PMAQI
20th Jul 2026251 PMAQI
20th Jul 2026252 PMAQI
20th Jul 2026293 PMAQI
20th Jul 2026294 PMAQI
20th Jul 2026255 PMAQI
20th Jul 2026256 PMAQI
20th Jul 2026257 PMAQI
20th Jul 2026258 PMAQI
20th Jul 2026259 PMAQI
20th Jul 20262510 PMAQI
20th Jul 20262711 PMAQI
21st Jul 20262712 AMAQI
21st Jul 2026271 AMAQI
21st Jul 2026402 AMAQI
21st Jul 2026343 AMAQI

18°C13/22°C

21st Jul 2026275 AMAQI
21st Jul 2026296 AMAQI
21st Jul 2026317 AMAQI
21st Jul 2026368 AMAQI
21st Jul 2026369 AMAQI
21st Jul 20262910 AMAQI
21st Jul 20263811 AMAQI
21st Jul 20262912 PMAQI
21st Jul 2026291 PMAQI
21st Jul 2026292 PMAQI
21st Jul 2026363 PMAQI
21st Jul 2026254 PMAQI
21st Jul 2026315 PMAQI
21st Jul 2026336 PMAQI
21st Jul 2026277 PMAQI
21st Jul 2026238 PMAQI
21st Jul 2026369 PMAQI
21st Jul 20263810 PMAQI
21st Jul 20262911 PMAQI
22nd Jul 20262912 AMAQI
22nd Jul 2026271 AMAQI
22nd Jul 2026232 AMAQI
22nd Jul 2026233 AMAQI
22nd Jul 2026294 AMAQI

19°C14/24°C

22nd Jul 2026295 AMAQI
22nd Jul 2026236 AMAQI
22nd Jul 2026257 AMAQI
22nd Jul 2026258 AMAQI
22nd Jul 2026259 AMAQI
22nd Jul 20262110 AMAQI
22nd Jul 20262111 AMAQI
22nd Jul 20262112 PMAQI
22nd Jul 2026211 PMAQI
22nd Jul 2026252 PMAQI
22nd Jul 2026273 PMAQI
22nd Jul 2026284 PMAQI
22nd Jul 2026305 PMAQI
22nd Jul 2026296 PMAQI
22nd Jul 2026297 PMAQI
22nd Jul 2026298 PMAQI
22nd Jul 2026279 PMAQI
22nd Jul 20262910 PMAQI
22nd Jul 20262711 PMAQI
23rd Jul 20262712 AMAQI
23rd Jul 2026271 AMAQI
23rd Jul 2026252 AMAQI
23rd Jul 2026253 AMAQI
23rd Jul 2026254 AMAQI

20°C17/23°C

23rd Jul 2026255 AMAQI
23rd Jul 2026256 AMAQI
23rd Jul 2026257 AMAQI
23rd Jul 2026258 AMAQI
23rd Jul 2026259 AMAQI
23rd Jul 20262110 AMAQI
23rd Jul 20262111 AMAQI
23rd Jul 20262112 PMAQI
23rd Jul 2026251 PMAQI
23rd Jul 2026212 PMAQI
23rd Jul 2026213 PMAQI
23rd Jul 2026274 PMAQI
23rd Jul 2026215 PMAQI
23rd Jul 2026216 PMAQI
23rd Jul 2026217 PMAQI
23rd Jul 2026238 PMAQI
23rd Jul 2026429 PMAQI
23rd Jul 20264410 PMAQI
23rd Jul 20263111 PMAQI
24th Jul 20262912 AMAQI
24th Jul 2026271 AMAQI
24th Jul 2026252 AMAQI
24th Jul 2026233 AMAQI
24th Jul 2026234 AMAQI

19°C17/22°C

24th Jul 2026275 AMAQI
24th Jul 2026276 AMAQI
24th Jul 2026317 AMAQI
24th Jul 2026298 AMAQI
24th Jul 2026299 AMAQI
24th Jul 20263110 AMAQI
24th Jul 20262911 AMAQI
24th Jul 20263312 PMAQI
24th Jul 2026331 PMAQI
24th Jul 2026312 PMAQI
24th Jul 2026333 PMAQI
24th Jul 2026334 PMAQI
24th Jul 2026335 PMAQI
24th Jul 2026336 PMAQI
24th Jul 2026317 PMAQI
24th Jul 2026318 PMAQI
24th Jul 2026299 PMAQI
24th Jul 20262510 PMAQI
24th Jul 20262511 PMAQI
25th Jul 20262712 AMAQI
25th Jul 2026251 AMAQI
25th Jul 2026212 AMAQI
25th Jul 2026233 AMAQI
25th Jul 2026254 AMAQI

20°C17/24°C

25th Jul 2026315 AMAQI
25th Jul 2026446 AMAQI
25th Jul 2026457 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026279 AMAQI
25th Jul 20262510 AMAQI
25th Jul 20262511 AMAQI
25th Jul 20262712 PMAQI
25th Jul 2026251 PMAQI
25th Jul 2026252 PMAQI
25th Jul 2026253 PMAQI
25th Jul 2026254 PMAQI
25th Jul 2026255 PMAQI
25th Jul 2026256 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026258 PMAQI
25th Jul 2026219 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262912 AMAQI
26th Jul 2026311 AMAQI
26th Jul 2026322 AMAQI
26th Jul 2026383 AMAQI
26th Jul 2026324 AMAQI

20°C15/25°C

26th Jul 2026275 AMAQI
26th Jul 2026296 AMAQI
26th Jul 2026317 AMAQI
26th Jul 2026348 AMAQI
26th Jul 2026339 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20262711 AMAQI
26th Jul 20262512 PMAQI
26th Jul 2026291 PMAQI
26th Jul 2026272 PMAQI
26th Jul 2026273 PMAQI
26th Jul 2026234 PMAQI
26th Jul 2026255 PMAQI
26th Jul 2026236 PMAQI
26th Jul 2026277 PMAQI
26th Jul 2026278 PMAQI
26th Jul 2026259 PMAQI
26th Jul 20262510 PMAQI
26th Jul 20262511 PMAQI
27th Jul 20262512 AMAQI
27th Jul 2026231 AMAQI
27th Jul 2026312 AMAQI
27th Jul 2026363 AMAQI
27th Jul 2026424 AMAQI

20°C16/26°C

27th Jul 2026305 AMAQI
27th Jul 2026256 AMAQI
27th Jul 2026257 AMAQI
27th Jul 2026278 AMAQI
27th Jul 2026259 AMAQI
27th Jul 20263110 AMAQI
27th Jul 20263611 AMAQI
27th Jul 20263112 PMAQI
27th Jul 2026311 PMAQI
27th Jul 2026272 PMAQI
27th Jul 2026253 PMAQI
27th Jul 2026344 PMAQI
27th Jul 2026345 PMAQI
27th Jul 2026386 PMAQI
27th Jul 2026407 PMAQI
27th Jul 2026338 PMAQI
27th Jul 2026369 PMAQI
27th Jul 20263310 PMAQI
27th Jul 20263611 PMAQI
28th Jul 20263312 AMAQI
28th Jul 2026291 AMAQI
28th Jul 2026342 AMAQI
28th Jul 2026313 AMAQI
28th Jul 2026274 AMAQI

19°C14/23°C

28th Jul 2026255 AMAQI
28th Jul 2026276 AMAQI
28th Jul 2026277 AMAQI
28th Jul 2026278 AMAQI
28th Jul 2026299 AMAQI
28th Jul 20262710 AMAQI
28th Jul 20262711 AMAQI
28th Jul 20262912 PMAQI
28th Jul 2026291 PMAQI
28th Jul 2026332 PMAQI
28th Jul 2026313 PMAQI
28th Jul 2026314 PMAQI
28th Jul 2026215 PMAQI
28th Jul 2026216 PMAQI
28th Jul 2026217 PMAQI
28th Jul 2026218 PMAQI
28th Jul 2026219 PMAQI
28th Jul 20262110 PMAQI
28th Jul 20262511 PMAQI
29th Jul 20262312 AMAQI
29th Jul 2026251 AMAQI
29th Jul 2026212 AMAQI
29th Jul 2026233 AMAQI
29th Jul 2026254 AMAQI

20°C17/24°C

29th Jul 2026275 AMAQI
29th Jul 2026216 AMAQI
29th Jul 2026257 AMAQI
29th Jul 2026278 AMAQI
29th Jul 2026239 AMAQI
29th Jul 20262710 AMAQI
29th Jul 20262511 AMAQI
29th Jul 20262912 PMAQI
29th Jul 2026271 PMAQI
29th Jul 2026292 PMAQI
29th Jul 2026333 PMAQI
29th Jul 2026314 PMAQI
29th Jul 2026335 PMAQI
29th Jul 2026386 PMAQI
29th Jul 2026387 PMAQI
29th Jul 2026338 PMAQI
29th Jul 2026299 PMAQI
29th Jul 20262510 PMAQI
29th Jul 20262511 PMAQI
30th Jul 20262912 AMAQI
30th Jul 2026331 AMAQI
30th Jul 2026332 AMAQI
30th Jul 2026363 AMAQI
30th Jul 2026254 AMAQI

21°C18/26°C

30th Jul 2026255 AMAQI
30th Jul 2026256 AMAQI
30th Jul 2026297 AMAQI
30th Jul 2026298 AMAQI
30th Jul 2026299 AMAQI
30th Jul 20263110 AMAQI
30th Jul 20263311 AMAQI
30th Jul 20263112 PMAQI
30th Jul 2026291 PMAQI
30th Jul 2026272 PMAQI
30th Jul 2026253 PMAQI
30th Jul 2026254 PMAQI
30th Jul 2026275 PMAQI
30th Jul 2026296 PMAQI
30th Jul 2026277 PMAQI
30th Jul 2026278 PMAQI
30th Jul 2026259 PMAQI
30th Jul 20262510 PMAQI
30th Jul 20262511 PMAQI
31st Jul 20262712 AMAQI
31st Jul 2026211 AMAQI
31st Jul 2026252 AMAQI
31st Jul 2026253 AMAQI
31st Jul 2026254 AMAQI

19°C16/23°C

31st Jul 2026255 AMAQI
31st Jul 2026256 AMAQI
31st Jul 2026237 AMAQI
31st Jul 2026258 AMAQI
31st Jul 2026239 AMAQI
31st Jul 20262510 AMAQI
31st Jul 20262111 AMAQI
31st Jul 20262512 PMAQI
31st Jul 2026231 PMAQI
31st Jul 2026252 PMAQI
31st Jul 2026253 PMAQI
31st Jul 2026274 PMAQI
31st Jul 2026255 PMAQI
31st Jul 2026256 PMAQI
31st Jul 2026257 PMAQI
31st Jul 2026278 PMAQI
31st Jul 2026299 PMAQI
31st Jul 20262710 PMAQI
31st Jul 20263111 PMAQI
1st Aug 20263812 AMAQI
1st Aug 2026361 AMAQI
1st Aug 2026342 AMAQI
1st Aug 2026253 AMAQI
1st Aug 2026294 AMAQI

19°C14/24°C

1st Aug 2026275 AMAQI
1st Aug 2026256 AMAQI
1st Aug 2026257 AMAQI
1st Aug 2026318 AMAQI
1st Aug 2026299 AMAQI
1st Aug 20263110 AMAQI
1st Aug 20263111 AMAQI
1st Aug 20262712 PMAQI
1st Aug 2026231 PMAQI
1st Aug 2026292 PMAQI
1st Aug 2026313 PMAQI
1st Aug 2026314 PMAQI
1st Aug 2026295 PMAQI
1st Aug 2026296 PMAQI
1st Aug 2026317 PMAQI
1st Aug 2026298 PMAQI
1st Aug 2026339 PMAQI
1st Aug 20263310 PMAQI
1st Aug 20263311 PMAQI
2nd Aug 20262512 AMAQI
2nd Aug 2026291 AMAQI
2nd Aug 2026312 AMAQI
2nd Aug 2026313 AMAQI
2nd Aug 2026294 AMAQI

18°C13/23°C

2nd Aug 2026295 AMAQI
2nd Aug 2026316 AMAQI
2nd Aug 2026297 AMAQI
2nd Aug 2026298 AMAQI
2nd Aug 2026319 AMAQI
2nd Aug 20263410 AMAQI
2nd Aug 20263111 AMAQI
2nd Aug 20262912 PMAQI
2nd Aug 2026291 PMAQI
2nd Aug 2026292 PMAQI
2nd Aug 2026233 PMAQI
2nd Aug 2026234 PMAQI
2nd Aug 2026215 PMAQI
2nd Aug 2026236 PMAQI
2nd Aug 2026317 PMAQI
2nd Aug 2026298 PMAQI
2nd Aug 2026299 PMAQI
2nd Aug 20262910 PMAQI
2nd Aug 20263311 PMAQI
3rd Aug 20263312 AMAQI
3rd Aug 2026291 AMAQI
3rd Aug 2026292 AMAQI
3rd Aug 2026293 AMAQI
3rd Aug 2026334 AMAQI

20°C14/24°C

3rd Aug 2026335 AMAQI
3rd Aug 2026336 AMAQI
3rd Aug 2026337 AMAQI
3rd Aug 2026298 AMAQI
3rd Aug 2026239 AMAQI
3rd Aug 20263210 AMAQI
3rd Aug 20264411 AMAQI
3rd Aug 20263212 PMAQI
3rd Aug 2026251 PMAQI
3rd Aug 2026272 PMAQI
3rd Aug 2026253 PMAQI
3rd Aug 2026234 PMAQI
3rd Aug 2026215 PMAQI
3rd Aug 2026256 PMAQI
3rd Aug 2026257 PMAQI
3rd Aug 2026258 PMAQI
3rd Aug 2026259 PMAQI
3rd Aug 20262510 PMAQI
3rd Aug 20262911 PMAQI
4th Aug 20262112 AMAQI
4th Aug 2026211 AMAQI
4th Aug 2026212 AMAQI
4th Aug 2026213 AMAQI
4th Aug 2026214 AMAQI

21°C16/25°C

4th Aug 2026215 AMAQI
4th Aug 2026216 AMAQI
4th Aug 2026217 AMAQI
4th Aug 2026258 AMAQI
4th Aug 2026219 AMAQI
4th Aug 20262310 AMAQI
4th Aug 20262111 AMAQI
4th Aug 20262112 PMAQI
4th Aug 2026251 PMAQI
4th Aug 2026252 PMAQI
4th Aug 2026253 PMAQI
4th Aug 2026254 PMAQI
4th Aug 2026255 PMAQI
4th Aug 2026256 PMAQI
4th Aug 2026257 PMAQI
4th Aug 2026238 PMAQI
4th Aug 2026239 PMAQI
4th Aug 20262110 PMAQI
4th Aug 20262511 PMAQI
5th Aug 20262712 AMAQI
5th Aug 2026231 AMAQI
5th Aug 2026252 AMAQI
5th Aug 2026253 AMAQI
5th Aug 2026274 AMAQI

20°C18/23°C

5th Aug 2026235 AMAQI
5th Aug 2026256 AMAQI
5th Aug 2026257 AMAQI
5th Aug 2026238 AMAQI
5th Aug 2026239 AMAQI
5th Aug 20262110 AMAQI
5th Aug 20262511 AMAQI
5th Aug 20262512 PMAQI
5th Aug 2026231 PMAQI
5th Aug 2026252 PMAQI
5th Aug 2026253 PMAQI
5th Aug 2026334 PMAQI
5th Aug 2026275 PMAQI
5th Aug 2026236 PMAQI
5th Aug 2026257 PMAQI
5th Aug 2026258 PMAQI
5th Aug 2026259 PMAQI
5th Aug 20262510 PMAQI
5th Aug 20262511 PMAQI
6th Aug 20262512 AMAQI
6th Aug 2026291 AMAQI
6th Aug 2026332 AMAQI
6th Aug 2026253 AMAQI
6th Aug 2026254 AMAQI

20°C16/23°C

6th Aug 2026255 AMAQI
6th Aug 2026216 AMAQI
6th Aug 2026237 AMAQI
6th Aug 2026258 AMAQI
6th Aug 2026259 AMAQI
6th Aug 20262710 AMAQI
6th Aug 20262511 AMAQI
6th Aug 20262912 PMAQI
6th Aug 2026331 PMAQI
6th Aug 2026212 PMAQI
6th Aug 2026213 PMAQI
6th Aug 2026234 PMAQI
6th Aug 2026255 PMAQI
6th Aug 2026256 PMAQI
6th Aug 2026217 PMAQI
6th Aug 2026218 PMAQI
6th Aug 2026299 PMAQI
6th Aug 20262710 PMAQI
6th Aug 20262911 PMAQI
7th Aug 20263112 AMAQI
7th Aug 2026291 AMAQI
7th Aug 2026292 AMAQI
7th Aug 2026293 AMAQI
7th Aug 2026214 AMAQI

18°C12/22°C

7th Aug 2026235 AMAQI
7th Aug 2026256 AMAQI
7th Aug 2026257 AMAQI
7th Aug 2026298 AMAQI
7th Aug 2026299 AMAQI
7th Aug 20262910 AMAQI
7th Aug 20262911 AMAQI
7th Aug 20262712 PMAQI
7th Aug 2026251 PMAQI
7th Aug 2026232 PMAQI
7th Aug 2026293 PMAQI
7th Aug 2026294 PMAQI
7th Aug 2026275 PMAQI
7th Aug 2026256 PMAQI
7th Aug 2026277 PMAQI
7th Aug 2026278 PMAQI
7th Aug 2026349 PMAQI
7th Aug 20262510 PMAQI
7th Aug 20262711 PMAQI
8th Aug 20263112 AMAQI
8th Aug 2026271 AMAQI
8th Aug 2026272 AMAQI
8th Aug 2026293 AMAQI
8th Aug 2026294 AMAQI

17°C13/22°C

8th Aug 2026295 AMAQI
8th Aug 2026256 AMAQI
8th Aug 2026257 AMAQI
8th Aug 2026298 AMAQI
8th Aug 2026259 AMAQI
8th Aug 20262310 AMAQI
8th Aug 20262511 AMAQI
8th Aug 20262512 PMAQI
8th Aug 2026251 PMAQI
8th Aug 2026272 PMAQI
8th Aug 2026293 PMAQI
8th Aug 2026254 PMAQI
8th Aug 2026235 PMAQI
8th Aug 2026296 PMAQI
8th Aug 2026317 PMAQI
8th Aug 2026368 PMAQI
8th Aug 2026389 PMAQI
8th Aug 20262710 PMAQI
8th Aug 20263611 PMAQI
9th Aug 20263412 AMAQI
9th Aug 2026291 AMAQI
9th Aug 2026272 AMAQI
9th Aug 2026273 AMAQI
9th Aug 2026294 AMAQI

19°C15/23°C

9th Aug 2026365 AMAQI
9th Aug 2026426 AMAQI
9th Aug 2026367 AMAQI
9th Aug 2026388 AMAQI
9th Aug 2026319 AMAQI
9th Aug 20263610 AMAQI
9th Aug 20263111 AMAQI
9th Aug 20262912 PMAQI
9th Aug 2026271 PMAQI
9th Aug 2026272 PMAQI
9th Aug 2026253 PMAQI
9th Aug 2026424 PMAQI
9th Aug 2026445 PMAQI
9th Aug 2026386 PMAQI
9th Aug 2026367 PMAQI
9th Aug 2026388 PMAQI
9th Aug 2026449 PMAQI
9th Aug 20263810 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20262112 AMAQI
10th Aug 2026271 AMAQI
10th Aug 2026332 AMAQI
10th Aug 2026363 AMAQI
10th Aug 2026234 AMAQI

21°C17/26°C

10th Aug 2026255 AMAQI
10th Aug 2026256 AMAQI
10th Aug 2026387 AMAQI
10th Aug 2026448 AMAQI
10th Aug 2026409 AMAQI
10th Aug 20262510 AMAQI
10th Aug 20263411 AMAQI
10th Aug 20263412 PMAQI
10th Aug 2026211 PMAQI
10th Aug 2026252 PMAQI
10th Aug 2026343 PMAQI
10th Aug 2026474 PMAQI
10th Aug 2026515 PMAQI
10th Aug 2026446 PMAQI
10th Aug 2026527 PMAQI
10th Aug 2026528 PMAQI
10th Aug 2026279 PMAQI
10th Aug 20265110 PMAQI
10th Aug 20265111 PMAQI
11th Aug 20265812 AMAQI
11th Aug 2026561 AMAQI
11th Aug 2026502 AMAQI
11th Aug 2026403 AMAQI
11th Aug 2026274 AMAQI

20°C16/25°C

11th Aug 2026275 AMAQI
11th Aug 2026296 AMAQI
11th Aug 2026237 AMAQI
11th Aug 2026238 AMAQI
11th Aug 2026239 AMAQI
11th Aug 20262710 AMAQI
11th Aug 20262911 AMAQI
11th Aug 20262712 PMAQI
11th Aug 2026271 PMAQI
11th Aug 2026252 PMAQI
11th Aug 2026293 PMAQI
11th Aug 2026254 PMAQI
11th Aug 2026295 PMAQI
11th Aug 2026386 PMAQI
11th Aug 2026237 PMAQI
11th Aug 2026238 PMAQI
11th Aug 2026259 PMAQI
11th Aug 20262110 PMAQI
11th Aug 20262311 PMAQI
12th Aug 20262712 AMAQI
12th Aug 2026361 AMAQI
12th Aug 2026212 AMAQI
12th Aug 2026273 AMAQI
12th Aug 2026324 AMAQI

20°C17/24°C

12th Aug 2026345 AMAQI
12th Aug 2026326 AMAQI
12th Aug 2026367 AMAQI
12th Aug 2026338 AMAQI
12th Aug 2026369 AMAQI
12th Aug 20263610 AMAQI
12th Aug 20263311 AMAQI
12th Aug 20262912 PMAQI
12th Aug 2026231 PMAQI
12th Aug 2026272 PMAQI
12th Aug 2026273 PMAQI
12th Aug 2026294 PMAQI
12th Aug 2026235 PMAQI
12th Aug 2026256 PMAQI
12th Aug 2026277 PMAQI
12th Aug 2026298 PMAQI
12th Aug 2026449 PMAQI
12th Aug 20264010 PMAQI
12th Aug 20264411 PMAQI
13th Aug 20263812 AMAQI
13th Aug 2026291 AMAQI
13th Aug 2026292 AMAQI
13th Aug 2026273 AMAQI
13th Aug 2026294 AMAQI

22°C17/26°C

13th Aug 2026255 AMAQI
13th Aug 2026256 AMAQI
13th Aug 2026277 AMAQI
13th Aug 2026328 AMAQI
13th Aug 2026369 AMAQI
13th Aug 20264010 AMAQI
13th Aug 20262711 AMAQI
13th Aug 20262712 PMAQI
13th Aug 2026291 PMAQI
13th Aug 2026292 PMAQI
13th Aug 2026363 PMAQI
13th Aug 2026294 PMAQI
13th Aug 2026295 PMAQI
13th Aug 2026296 PMAQI
13th Aug 2026337 PMAQI
13th Aug 2026338 PMAQI
13th Aug 2026339 PMAQI
13th Aug 20263610 PMAQI
13th Aug 20263011 PMAQI
14th Aug 20262112 AMAQI
14th Aug 2026211 AMAQI
14th Aug 2026212 AMAQI
14th Aug 2026213 AMAQI
14th Aug 2026214 AMAQI

24°C20/27°C

14th Aug 2026215 AMAQI
14th Aug 2026216 AMAQI
14th Aug 2026217 AMAQI
14th Aug 2026238 AMAQI
14th Aug 2026239 AMAQI
14th Aug 20262510 AMAQI
14th Aug 20262511 AMAQI
14th Aug 20262512 PMAQI
14th Aug 2026251 PMAQI
14th Aug 2026312 PMAQI
14th Aug 2026293 PMAQI
14th Aug 2026314 PMAQI
14th Aug 2026335 PMAQI
14th Aug 2026316 PMAQI
14th Aug 2026317 PMAQI
14th Aug 2026318 PMAQI
14th Aug 2026319 PMAQI
14th Aug 20263110 PMAQI
14th Aug 20264211 PMAQI
15th Aug 20264712 AMAQI
15th Aug 2026271 AMAQI
15th Aug 2026292 AMAQI
15th Aug 2026253 AMAQI
15th Aug 2026274 AMAQI

24°C19/29°C

15th Aug 2026315 AMAQI
15th Aug 2026316 AMAQI
15th Aug 2026317 AMAQI
15th Aug 2026278 AMAQI
15th Aug 2026259 AMAQI
15th Aug 20263110 AMAQI
15th Aug 20263311 AMAQI
15th Aug 20262512 PMAQI
15th Aug 2026211 PMAQI
15th Aug 2026272 PMAQI
15th Aug 2026213 PMAQI
15th Aug 2026254 PMAQI
15th Aug 2026235 PMAQI
15th Aug 2026256 PMAQI
15th Aug 2026257 PMAQI
15th Aug 2026258 PMAQI
15th Aug 2026299 PMAQI
15th Aug 20263410 PMAQI
15th Aug 20262711 PMAQI
16th Aug 20262512 AMAQI
16th Aug 2026251 AMAQI
16th Aug 2026252 AMAQI
16th Aug 2026253 AMAQI
16th Aug 2026254 AMAQI

22°C18/28°C

16th Aug 2026215 AMAQI
16th Aug 2026316 AMAQI
16th Aug 2026297 AMAQI
16th Aug 2026318 AMAQI
16th Aug 2026509 AMAQI
16th Aug 20265010 AMAQI
16th Aug 20264611 AMAQI
16th Aug 20264012 PMAQI
16th Aug 2026361 PMAQI
16th Aug 2026312 PMAQI
16th Aug 2026253 PMAQI
16th Aug 2026234 PMAQI
16th Aug 2026315 PMAQI
16th Aug 2026276 PMAQI
16th Aug 2026297 PMAQI
16th Aug 2026298 PMAQI
16th Aug 2026319 PMAQI
16th Aug 20262510 PMAQI
16th Aug 20262711 PMAQI
17th Aug 20263412 AMAQI
17th Aug 2026291 AMAQI
17th Aug 2026272 AMAQI
17th Aug 2026273 AMAQI
17th Aug 2026254 AMAQI

19°C14/25°C

17th Aug 2026235 AMAQI
17th Aug 2026256 AMAQI
17th Aug 2026277 AMAQI
17th Aug 2026258 AMAQI
17th Aug 2026259 AMAQI
17th Aug 20262710 AMAQI
17th Aug 20263111 AMAQI
17th Aug 20263312 PMAQI
17th Aug 2026361 PMAQI
17th Aug 2026382 PMAQI
17th Aug 2026363 PMAQI
17th Aug 2026274 PMAQI
17th Aug 2026255 PMAQI
17th Aug 2026256 PMAQI
17th Aug 2026277 PMAQI
17th Aug 2026298 PMAQI
17th Aug 2026369 PMAQI
17th Aug 20263410 PMAQI
17th Aug 20262911 PMAQI
18th Aug 20263112 AMAQI
18th Aug 2026291 AMAQI
18th Aug 2026272 AMAQI
18th Aug 2026213 AMAQI
18th Aug 2026254 AMAQI

12°C-2/23°C

18th Aug 2026235 AMAQI
5 AM
18th Aug 2026256 AMAQI
18th Aug 2026347 AMAQI
18th Aug 2026278 AMAQI
18th Aug 2026299 AMAQI
18th Aug 20262510 AMAQI
18th Aug 20263111 AMAQI
18th Aug 20262912 PMAQI
12 PM
18th Aug 2026231 PMAQI
18th Aug 2026252 PMAQI
18th Aug 2026253 PMAQI
18th Aug 2026254 PMAQI
18th Aug 2026255 PMAQI
18th Aug 2026276 PMAQI
18th Aug 2026317 PMAQI
18th Aug 2026408 PMAQI
8 PM
18th Aug 2026369 PMAQI
18th Aug 20262710 PMAQI
18th Aug 20262511 PMAQI
12 AM
4 AM

20°C17/24°C

Day time
Avg. Highest Time
8 AM

29AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM - 6 AM

27AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 8 AM (Avg. 29), while the lowest AQI was between 5 AM to 6 AM (Avg. 27).
Night time
Avg. Highest Time
9 PM

31AQI

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

27AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 9 PM (Avg. 31), while the lowest AQI was between 4 AM to 4 AM (Avg. 27).

2026 Days Vs Air Quality

Hilsea, Portsmouth, United Kingdom

2026

95%

216

5%

11

Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)

Good
216 Days
Moderate
11 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 95%

Health Risk Level:

Very Low

In 2026, 95% of 230 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.

Annual Air Quality Insights

Hilsea, Portsmouth, United Kingdom

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
36AQI (US)
2nd January 2026
24AQI (US)
3rd January 2026
28AQI (US)
4th January 2026
32AQI (US)
5th January 2026
36AQI (US)
6th January 2026
35AQI (US)
7th January 2026
23AQI (US)
8th January 2026
32AQI (US)
9th January 2026
20AQI (US)
10th January 2026
32AQI (US)
11th January 2026
37AQI (US)
12th January 2026
28AQI (US)
13th January 2026
19AQI (US)
14th January 2026
26AQI (US)
15th January 2026
19AQI (US)
16th January 2026
24AQI (US)
17th January 2026
21AQI (US)
18th January 2026
53AQI (US)
19th January 2026
50AQI (US)
20th January 2026
23AQI (US)
21st January 2026
17AQI (US)
22nd January 2026
34AQI (US)
23rd January 2026
49AQI (US)
24th January 2026
45AQI (US)
25th January 2026
46AQI (US)
26th January 2026
42AQI (US)
27th January 2026
23AQI (US)
28th January 2026
20AQI (US)
29th January 2026
43AQI (US)
30th January 2026
37AQI (US)
31st January 2026
33AQI (US)
1st February 2026
42AQI (US)
2nd February 2026
44AQI (US)
3rd February 2026
43AQI (US)
4th February 2026
30AQI (US)
5th February 2026
30AQI (US)
6th February 2026
33AQI (US)
7th February 2026
34AQI (US)
8th February 2026
38AQI (US)
9th February 2026
40AQI (US)
10th February 2026
35AQI (US)
11th February 2026
41AQI (US)
12th February 2026
33AQI (US)
13th February 2026
43AQI (US)
14th February 2026
40AQI (US)
15th February 2026
32AQI (US)
16th February 2026
37AQI (US)
17th February 2026
40AQI (US)
18th February 2026
35AQI (US)
19th February 2026
35AQI (US)
20th February 2026
39AQI (US)
21st February 2026
36AQI (US)
22nd February 2026
29AQI (US)
23rd February 2026
31AQI (US)
24th February 2026
26AQI (US)
25th February 2026
34AQI (US)
26th February 2026
31AQI (US)
27th February 2026
29AQI (US)
28th February 2026
27AQI (US)
1st March 2026
33AQI (US)
2nd March 2026
38AQI (US)
3rd March 2026
50AQI (US)
4th March 2026
52AQI (US)
5th March 2026
58AQI (US)
6th March 2026
65AQI (US)
7th March 2026
37AQI (US)
8th March 2026
75AQI (US)
9th March 2026
95AQI (US)
10th March 2026
32AQI (US)
11th March 2026
21AQI (US)
12th March 2026
34AQI (US)
13th March 2026
32AQI (US)
14th March 2026
31AQI (US)
15th March 2026
24AQI (US)
16th March 2026
21AQI (US)
17th March 2026
31AQI (US)
18th March 2026
30AQI (US)
19th March 2026
40AQI (US)
20th March 2026
74AQI (US)
21st March 2026
26AQI (US)
22nd March 2026
28AQI (US)
23rd March 2026
64AQI (US)
24th March 2026
41AQI (US)
25th March 2026
10AQI (US)
26th March 2026
16AQI (US)
27th March 2026
24AQI (US)
28th March 2026
27AQI (US)
29th March 2026
26AQI (US)
30th March 2026
23AQI (US)
31st March 2026
23AQI (US)
1st April 2026
26AQI (US)
2nd April 2026
25AQI (US)
3rd April 2026
27AQI (US)
4th April 2026
25AQI (US)
5th April 2026
28AQI (US)
6th April 2026
24AQI (US)
7th April 2026
20AQI (US)
8th April 2026
36AQI (US)
9th April 2026
27AQI (US)
10th April 2026
27AQI (US)
11th April 2026
31AQI (US)
12th April 2026
29AQI (US)
13th April 2026
26AQI (US)
14th April 2026
27AQI (US)
15th April 2026
29AQI (US)
16th April 2026
30AQI (US)
17th April 2026
18th April 2026
25AQI (US)
19th April 2026
27AQI (US)
20th April 2026
20AQI (US)
21st April 2026
26AQI (US)
22nd April 2026
23rd April 2026
22AQI (US)
24th April 2026
22AQI (US)
25th April 2026
28AQI (US)
26th April 2026
31AQI (US)
27th April 2026
28AQI (US)
28th April 2026
23AQI (US)
29th April 2026
21AQI (US)
30th April 2026
23AQI (US)
1st May 2026
20AQI (US)
2nd May 2026
33AQI (US)
3rd May 2026
34AQI (US)
4th May 2026
41AQI (US)
5th May 2026
45AQI (US)
6th May 2026
21AQI (US)
7th May 2026
23AQI (US)
8th May 2026
25AQI (US)
9th May 2026
10th May 2026
22AQI (US)
11th May 2026
16AQI (US)
12th May 2026
24AQI (US)
13th May 2026
23AQI (US)
14th May 2026
18AQI (US)
15th May 2026
29AQI (US)
16th May 2026
34AQI (US)
17th May 2026
37AQI (US)
18th May 2026
34AQI (US)
19th May 2026
33AQI (US)
20th May 2026
31AQI (US)
21st May 2026
37AQI (US)
22nd May 2026
30AQI (US)
23rd May 2026
42AQI (US)
24th May 2026
57AQI (US)
25th May 2026
38AQI (US)
26th May 2026
35AQI (US)
27th May 2026
26AQI (US)
28th May 2026
27AQI (US)
29th May 2026
25AQI (US)
30th May 2026
15AQI (US)
31st May 2026
21AQI (US)
1st June 2026
22AQI (US)
2nd June 2026
20AQI (US)
3rd June 2026
18AQI (US)
4th June 2026
22AQI (US)
5th June 2026
21AQI (US)
6th June 2026
20AQI (US)
7th June 2026
21AQI (US)
8th June 2026
19AQI (US)
9th June 2026
16AQI (US)
10th June 2026
21AQI (US)
11th June 2026
21AQI (US)
12th June 2026
20AQI (US)
13th June 2026
20AQI (US)
14th June 2026
20AQI (US)
15th June 2026
17AQI (US)
16th June 2026
22AQI (US)
17th June 2026
21AQI (US)
18th June 2026
21AQI (US)
19th June 2026
21AQI (US)
20th June 2026
18AQI (US)
21st June 2026
18AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
23AQI (US)
24th June 2026
31AQI (US)
25th June 2026
57AQI (US)
26th June 2026
76AQI (US)
27th June 2026
33AQI (US)
28th June 2026
13AQI (US)
29th June 2026
21AQI (US)
30th June 2026
16AQI (US)
1st July 2026
17AQI (US)
2nd July 2026
18AQI (US)
3rd July 2026
29AQI (US)
4th July 2026
16AQI (US)
5th July 2026
9AQI (US)
6th July 2026
16AQI (US)
7th July 2026
19AQI (US)
8th July 2026
35AQI (US)
9th July 2026
44AQI (US)
10th July 2026
29AQI (US)
11th July 2026
28AQI (US)
12th July 2026
26AQI (US)
13th July 2026
28AQI (US)
14th July 2026
28AQI (US)
15th July 2026
25AQI (US)
16th July 2026
26AQI (US)
17th July 2026
33AQI (US)
18th July 2026
50AQI (US)
19th July 2026
34AQI (US)
20th July 2026
26AQI (US)
21st July 2026
31AQI (US)
22nd July 2026
26AQI (US)
23rd July 2026
26AQI (US)
24th July 2026
29AQI (US)
25th July 2026
27AQI (US)
26th July 2026
28AQI (US)
27th July 2026
31AQI (US)
28th July 2026
27AQI (US)
29th July 2026
28AQI (US)
30th July 2026
28AQI (US)
31st July 2026
25AQI (US)
1st August 2026
30AQI (US)
2nd August 2026
29AQI (US)
3rd August 2026
29AQI (US)
4th August 2026
23AQI (US)
5th August 2026
25AQI (US)
6th August 2026
26AQI (US)
7th August 2026
27AQI (US)
8th August 2026
28AQI (US)
9th August 2026
34AQI (US)
10th August 2026
36AQI (US)
11th August 2026
30AQI (US)
12th August 2026
31AQI (US)
13th August 2026
31AQI (US)
14th August 2026
26AQI (US)
15th August 2026
28AQI (US)
16th August 2026
31AQI (US)
17th August 2026
29AQI (US)
18th August 2026
28AQI (US)
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
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

32AQI (US)

35AQI (US)

38AQI (US)

26AQI (US)

30AQI (US)

24AQI (US)

27AQI (US)

29AQI (US)

No. of days

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

202630AQI (US)

30
1
28
24
7
28
29
1
28
2
31
18
216
11

Highest AQI (US) recorded in

March

38AQI (US)

Lowest AQI (US) recorded in

June

24AQI (US)

202537AQI (US)

20
11
16
12
15
14
2
19
11
29
2
29
1
31
28
3
30
27
4
30
23
8
297
66
2

Highest AQI (US) recorded in

March

54AQI (US)

Lowest AQI (US) recorded in

September

23AQI (US)

202436AQI (US)

24
6
28
1
28
3
30
24
7
29
1
28
2
1
23
8
25
5
30
1
17
13
29
2
315
49
1

Highest AQI (US) recorded in

November

46AQI (US)

Lowest AQI (US) recorded in

October

29AQI (US)

202337AQI (US)

24
6
19
7
2
26
5
21
9
29
2
21
9
31
30
1
24
5
28
3
29
29
2
311
49
2

Highest AQI (US) recorded in

February

46AQI (US)

Lowest AQI (US) recorded in

August

26AQI (US)

202239AQI (US)

15
6
14
17
25
5
29
2
29
1
23
2
3
27
1
31
25
5
18
13
239
52

Highest AQI (US) recorded in

March

61AQI (US)

Lowest AQI (US) recorded in

September

28AQI (US)

Most & Least Polluted Years Over the Last 5 Years

Most Polluted Year Recorded
2022(Avg.)
39AQI (US)
Least Polluted Year Recorded
2026(Avg.)
30AQI (US)

Hilsea's annual 2026 AQI (US) (30) shows an average percentage change of -19.3% (improved AQI (US)) compared to previous years: 2022 (39), 2023 (37), 2024 (36), 2025 (37).