Chi, Chur, Graubunden, Switzerland 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
Chi, Chur, Graubunden, Switzerland
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
25th Aug 2023
38AQILowest AQI recorded on
3rd Aug 2021
13AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 23 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025
Chi, Chur, Graubunden, Switzerland
AQI
Day
Night
.
5 AM2nd Aug 2025
9 PM
4 AM3rd Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
11PM2nd Aug
29AQI
Avg. Lowest Time
10AM2nd Aug
17AQI
In the last 24 hours,
Chi's AQI reached its highest point of 29 at 11 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 2nd Aug and 3rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Chi, Chur, Graubunden, Switzerland
JulAug
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Jul 2025415 AMAQI
4th Jul 2025356 AMAQI
4th Jul 2025407 AMAQI
4th Jul 2025408 AMAQI
4th Jul 2025409 AMAQI
4th Jul 20253810 AMAQI
4th Jul 20253811 AMAQI
4th Jul 20253912 PMAQI
4th Jul 2025381 PMAQI
4th Jul 2025362 PMAQI
4th Jul 2025363 PMAQI
4th Jul 2025344 PMAQI
4th Jul 2025355 PMAQI
4th Jul 2025356 PMAQI
4th Jul 2025357 PMAQI
4th Jul 2025378 PMAQI
4th Jul 2025389 PMAQI
4th Jul 20253610 PMAQI
4th Jul 20253611 PMAQI
5th Jul 20253612 AMAQI
5th Jul 2025361 AMAQI
5th Jul 2025382 AMAQI
5th Jul 2025443 AMAQI
5th Jul 2025434 AMAQI
15°C11/20°C
5th Jul 2025425 AMAQI
5th Jul 2025396 AMAQI
5th Jul 2025397 AMAQI
5th Jul 2025408 AMAQI
5th Jul 2025439 AMAQI
5th Jul 20254410 AMAQI
5th Jul 20254411 AMAQI
5th Jul 20254412 PMAQI
5th Jul 2025361 PMAQI
5th Jul 2025352 PMAQI
5th Jul 2025353 PMAQI
5th Jul 2025354 PMAQI
5th Jul 2025355 PMAQI
5th Jul 2025346 PMAQI
5th Jul 2025347 PMAQI
5th Jul 2025348 PMAQI
5th Jul 2025349 PMAQI
5th Jul 20253410 PMAQI
5th Jul 20253411 PMAQI
6th Jul 20253512 AMAQI
6th Jul 2025361 AMAQI
6th Jul 2025442 AMAQI
6th Jul 2025473 AMAQI
6th Jul 2025514 AMAQI
16°C11/21°C
6th Jul 2025545 AMAQI
6th Jul 2025556 AMAQI
6th Jul 2025597 AMAQI
6th Jul 2025588 AMAQI
6th Jul 2025629 AMAQI
6th Jul 20256210 AMAQI
6th Jul 20255711 AMAQI
6th Jul 20254712 PMAQI
6th Jul 2025291 PMAQI
6th Jul 2025362 PMAQI
6th Jul 2025343 PMAQI
6th Jul 2025334 PMAQI
6th Jul 2025345 PMAQI
6th Jul 2025386 PMAQI
6th Jul 2025417 PMAQI
6th Jul 2025378 PMAQI
6th Jul 2025349 PMAQI
6th Jul 20253410 PMAQI
6th Jul 20253411 PMAQI
7th Jul 20253512 AMAQI
7th Jul 2025351 AMAQI
7th Jul 2025282 AMAQI
7th Jul 2025303 AMAQI
7th Jul 2025274 AMAQI
13°C9/19°C
7th Jul 2025275 AMAQI
7th Jul 2025296 AMAQI
7th Jul 2025297 AMAQI
7th Jul 2025278 AMAQI
7th Jul 2025319 AMAQI
7th Jul 20253110 AMAQI
7th Jul 20253011 AMAQI
7th Jul 20252712 PMAQI
7th Jul 2025241 PMAQI
7th Jul 2025262 PMAQI
7th Jul 2025263 PMAQI
7th Jul 2025284 PMAQI
7th Jul 2025265 PMAQI
7th Jul 2025266 PMAQI
7th Jul 2025277 PMAQI
7th Jul 2025268 PMAQI
7th Jul 2025259 PMAQI
7th Jul 20252510 PMAQI
7th Jul 20252511 PMAQI
8th Jul 20252712 AMAQI
8th Jul 2025281 AMAQI
8th Jul 2025222 AMAQI
8th Jul 2025173 AMAQI
8th Jul 2025164 AMAQI
10°C5/15°C
8th Jul 2025175 AMAQI
8th Jul 2025206 AMAQI
8th Jul 2025217 AMAQI
8th Jul 2025208 AMAQI
8th Jul 2025209 AMAQI
8th Jul 20252010 AMAQI
8th Jul 20252011 AMAQI
8th Jul 20252112 PMAQI
8th Jul 2025221 PMAQI
8th Jul 2025242 PMAQI
8th Jul 2025243 PMAQI
8th Jul 2025244 PMAQI
8th Jul 2025225 PMAQI
8th Jul 2025226 PMAQI
8th Jul 2025207 PMAQI
8th Jul 2025208 PMAQI
8th Jul 2025219 PMAQI
8th Jul 20252010 PMAQI
8th Jul 20252011 PMAQI
9th Jul 20252212 AMAQI
9th Jul 2025231 AMAQI
9th Jul 2025202 AMAQI
9th Jul 2025183 AMAQI
9th Jul 2025194 AMAQI
6°C4/7°C
9th Jul 2025185 AMAQI
9th Jul 2025206 AMAQI
9th Jul 2025227 AMAQI
9th Jul 2025228 AMAQI
9th Jul 2025249 AMAQI
9th Jul 20252310 AMAQI
9th Jul 20252011 AMAQI
9th Jul 20252212 PMAQI
9th Jul 2025201 PMAQI
9th Jul 2025192 PMAQI
9th Jul 2025203 PMAQI
9th Jul 2025204 PMAQI
9th Jul 2025205 PMAQI
9th Jul 2025206 PMAQI
9th Jul 2025207 PMAQI
9th Jul 2025208 PMAQI
9th Jul 2025209 PMAQI
9th Jul 20252010 PMAQI
9th Jul 20252011 PMAQI
10th Jul 20252212 AMAQI
10th Jul 2025231 AMAQI
10th Jul 2025342 AMAQI
10th Jul 2025393 AMAQI
10th Jul 2025384 AMAQI
8°C4/14°C
10th Jul 2025365 AMAQI
10th Jul 2025346 AMAQI
10th Jul 2025337 AMAQI
10th Jul 2025288 AMAQI
10th Jul 2025419 AMAQI
10th Jul 20253610 AMAQI
10th Jul 20254111 AMAQI
10th Jul 20253312 PMAQI
10th Jul 2025321 PMAQI
10th Jul 2025282 PMAQI
10th Jul 2025223 PMAQI
10th Jul 2025224 PMAQI
10th Jul 2025225 PMAQI
10th Jul 2025226 PMAQI
10th Jul 2025217 PMAQI
10th Jul 2025228 PMAQI
10th Jul 2025249 PMAQI
10th Jul 20252410 PMAQI
10th Jul 20252411 PMAQI
11th Jul 20252412 AMAQI
11th Jul 2025241 AMAQI
11th Jul 2025282 AMAQI
11th Jul 2025363 AMAQI
11th Jul 2025414 AMAQI
10°C3/16°C
11th Jul 2025385 AMAQI
11th Jul 2025366 AMAQI
11th Jul 2025327 AMAQI
11th Jul 2025328 AMAQI
11th Jul 2025439 AMAQI
11th Jul 20253510 AMAQI
11th Jul 20253311 AMAQI
11th Jul 20253912 PMAQI
11th Jul 2025341 PMAQI
11th Jul 2025302 PMAQI
11th Jul 2025273 PMAQI
11th Jul 2025264 PMAQI
11th Jul 2025285 PMAQI
11th Jul 2025286 PMAQI
11th Jul 2025277 PMAQI
11th Jul 2025258 PMAQI
11th Jul 2025269 PMAQI
11th Jul 20252710 PMAQI
11th Jul 20252511 PMAQI
12th Jul 20252612 AMAQI
12th Jul 2025291 AMAQI
12th Jul 2025282 AMAQI
12th Jul 2025333 AMAQI
12th Jul 2025364 AMAQI
11°C5/17°C
12th Jul 2025325 AMAQI
12th Jul 2025316 AMAQI
12th Jul 2025297 AMAQI
12th Jul 2025348 AMAQI
12th Jul 2025469 AMAQI
12th Jul 20254410 AMAQI
12th Jul 20254211 AMAQI
12th Jul 20254012 PMAQI
12th Jul 2025331 PMAQI
12th Jul 2025372 PMAQI
12th Jul 2025393 PMAQI
12th Jul 2025364 PMAQI
12th Jul 2025375 PMAQI
12th Jul 2025306 PMAQI
12th Jul 2025297 PMAQI
12th Jul 2025328 PMAQI
12th Jul 2025349 PMAQI
12th Jul 20253410 PMAQI
12th Jul 20253611 PMAQI
13th Jul 20253912 AMAQI
13th Jul 2025431 AMAQI
13th Jul 2025462 AMAQI
13th Jul 2025543 AMAQI
13th Jul 2025554 AMAQI
12°C7/19°C
13th Jul 2025545 AMAQI
13th Jul 2025536 AMAQI
13th Jul 2025527 AMAQI
13th Jul 2025558 AMAQI
13th Jul 2025609 AMAQI
13th Jul 20255810 AMAQI
13th Jul 20255511 AMAQI
13th Jul 20254812 PMAQI
13th Jul 2025441 PMAQI
13th Jul 2025462 PMAQI
13th Jul 2025453 PMAQI
13th Jul 2025444 PMAQI
13th Jul 2025435 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025417 PMAQI
13th Jul 2025438 PMAQI
13th Jul 2025409 PMAQI
13th Jul 20253410 PMAQI
13th Jul 20253811 PMAQI
14th Jul 20253912 AMAQI
14th Jul 2025411 AMAQI
14th Jul 2025402 AMAQI
14th Jul 2025463 AMAQI
14th Jul 2025424 AMAQI
14°C9/20°C
14th Jul 2025415 AMAQI
14th Jul 2025386 AMAQI
14th Jul 2025387 AMAQI
14th Jul 2025398 AMAQI
14th Jul 2025399 AMAQI
14th Jul 20253410 AMAQI
14th Jul 20252911 AMAQI
14th Jul 20252912 PMAQI
14th Jul 2025291 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025293 PMAQI
14th Jul 2025294 PMAQI
14th Jul 2025325 PMAQI
14th Jul 2025306 PMAQI
14th Jul 2025347 PMAQI
14th Jul 2025318 PMAQI
14th Jul 2025309 PMAQI
14th Jul 20253410 PMAQI
14th Jul 20253411 PMAQI
15th Jul 20253812 AMAQI
15th Jul 2025401 AMAQI
15th Jul 2025272 AMAQI
15th Jul 2025223 AMAQI
15th Jul 2025244 AMAQI
13°C10/19°C
15th Jul 2025225 AMAQI
15th Jul 2025326 AMAQI
15th Jul 2025307 AMAQI
15th Jul 2025268 AMAQI
15th Jul 2025269 AMAQI
15th Jul 20252410 AMAQI
15th Jul 20252611 AMAQI
15th Jul 20252712 PMAQI
15th Jul 2025241 PMAQI
15th Jul 2025252 PMAQI
15th Jul 2025263 PMAQI
15th Jul 2025254 PMAQI
15th Jul 2025275 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025297 PMAQI
15th Jul 2025288 PMAQI
15th Jul 2025309 PMAQI
15th Jul 20253110 PMAQI
15th Jul 20253011 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025311 AMAQI
16th Jul 2025302 AMAQI
16th Jul 2025283 AMAQI
16th Jul 2025274 AMAQI
13°C9/20°C
16th Jul 2025275 AMAQI
16th Jul 2025306 AMAQI
16th Jul 2025287 AMAQI
16th Jul 2025278 AMAQI
16th Jul 2025289 AMAQI
16th Jul 20252710 AMAQI
16th Jul 20252811 AMAQI
16th Jul 20252812 PMAQI
16th Jul 2025281 PMAQI
16th Jul 2025332 PMAQI
16th Jul 2025313 PMAQI
16th Jul 2025304 PMAQI
16th Jul 2025275 PMAQI
16th Jul 2025266 PMAQI
16th Jul 2025267 PMAQI
16th Jul 2025268 PMAQI
16th Jul 2025279 PMAQI
16th Jul 20252810 PMAQI
16th Jul 20252811 PMAQI
17th Jul 20252812 AMAQI
17th Jul 2025281 AMAQI
17th Jul 2025232 AMAQI
17th Jul 2025203 AMAQI
17th Jul 2025224 AMAQI
11°C9/14°C
17th Jul 2025235 AMAQI
17th Jul 2025266 AMAQI
17th Jul 2025247 AMAQI
17th Jul 2025248 AMAQI
17th Jul 2025229 AMAQI
17th Jul 20252310 AMAQI
17th Jul 20252211 AMAQI
17th Jul 20252012 PMAQI
17th Jul 2025211 PMAQI
17th Jul 2025222 PMAQI
17th Jul 2025233 PMAQI
17th Jul 2025244 PMAQI
17th Jul 2025245 PMAQI
17th Jul 2025236 PMAQI
17th Jul 2025217 PMAQI
17th Jul 2025228 PMAQI
17th Jul 2025239 PMAQI
17th Jul 20252310 PMAQI
17th Jul 20252311 PMAQI
18th Jul 20252312 AMAQI
18th Jul 2025231 AMAQI
18th Jul 2025202 AMAQI
18th Jul 2025183 AMAQI
18th Jul 2025204 AMAQI
12°C9/18°C
18th Jul 2025205 AMAQI
18th Jul 2025206 AMAQI
18th Jul 2025217 AMAQI
18th Jul 2025228 AMAQI
18th Jul 2025229 AMAQI
18th Jul 20252210 AMAQI
18th Jul 20252111 AMAQI
18th Jul 20252212 PMAQI
18th Jul 2025221 PMAQI
18th Jul 2025202 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025214 PMAQI
18th Jul 2025225 PMAQI
18th Jul 2025226 PMAQI
18th Jul 2025227 PMAQI
18th Jul 2025228 PMAQI
18th Jul 2025229 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252111 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025211 AMAQI
19th Jul 2025242 AMAQI
19th Jul 2025263 AMAQI
19th Jul 2025264 AMAQI
14°C7/21°C
19th Jul 2025265 AMAQI
19th Jul 2025256 AMAQI
19th Jul 2025247 AMAQI
19th Jul 2025258 AMAQI
19th Jul 2025249 AMAQI
19th Jul 20252610 AMAQI
19th Jul 20252511 AMAQI
19th Jul 20252612 PMAQI
19th Jul 2025271 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025243 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025235 PMAQI
19th Jul 2025236 PMAQI
19th Jul 2025237 PMAQI
19th Jul 2025248 PMAQI
19th Jul 2025249 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252411 PMAQI
20th Jul 20252412 AMAQI
20th Jul 2025251 AMAQI
20th Jul 2025272 AMAQI
20th Jul 2025283 AMAQI
20th Jul 2025254 AMAQI
16°C11/25°C
20th Jul 2025245 AMAQI
20th Jul 2025246 AMAQI
20th Jul 2025247 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025259 AMAQI
20th Jul 20252510 AMAQI
20th Jul 20252711 AMAQI
20th Jul 20252712 PMAQI
20th Jul 2025251 PMAQI
20th Jul 2025262 PMAQI
20th Jul 2025263 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025266 PMAQI
20th Jul 2025267 PMAQI
20th Jul 2025268 PMAQI
20th Jul 2025269 PMAQI
20th Jul 20252610 PMAQI
20th Jul 20252611 PMAQI
21st Jul 20252612 AMAQI
21st Jul 2025291 AMAQI
21st Jul 2025252 AMAQI
21st Jul 2025203 AMAQI
21st Jul 2025204 AMAQI
16°C10/23°C
21st Jul 2025205 AMAQI
21st Jul 2025226 AMAQI
21st Jul 2025227 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025209 AMAQI
21st Jul 20251910 AMAQI
21st Jul 20251911 AMAQI
21st Jul 20252112 PMAQI
21st Jul 2025201 PMAQI
21st Jul 2025242 PMAQI
21st Jul 2025233 PMAQI
21st Jul 2025224 PMAQI
21st Jul 2025205 PMAQI
21st Jul 2025206 PMAQI
21st Jul 2025207 PMAQI
21st Jul 2025208 PMAQI
21st Jul 2025219 PMAQI
21st Jul 20252110 PMAQI
21st Jul 20252111 PMAQI
22nd Jul 20252212 AMAQI
22nd Jul 2025221 AMAQI
22nd Jul 2025172 AMAQI
22nd Jul 2025153 AMAQI
22nd Jul 2025154 AMAQI
10°C8/13°C
22nd Jul 2025145 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025169 AMAQI
22nd Jul 20251610 AMAQI
22nd Jul 20251711 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025173 PMAQI
22nd Jul 2025164 PMAQI
22nd Jul 2025165 PMAQI
22nd Jul 2025176 PMAQI
22nd Jul 2025177 PMAQI
22nd Jul 2025168 PMAQI
22nd Jul 2025179 PMAQI
22nd Jul 20251710 PMAQI
22nd Jul 20251711 PMAQI
23rd Jul 20251712 AMAQI
23rd Jul 2025181 AMAQI
23rd Jul 2025162 AMAQI
23rd Jul 2025143 AMAQI
23rd Jul 2025174 AMAQI
12°C7/17°C
23rd Jul 2025175 AMAQI
23rd Jul 2025176 AMAQI
23rd Jul 2025177 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025199 AMAQI
23rd Jul 20251810 AMAQI
23rd Jul 20251711 AMAQI
23rd Jul 20251712 PMAQI
23rd Jul 2025171 PMAQI
23rd Jul 2025182 PMAQI
23rd Jul 2025163 PMAQI
23rd Jul 2025174 PMAQI
23rd Jul 2025175 PMAQI
23rd Jul 2025176 PMAQI
23rd Jul 2025177 PMAQI
23rd Jul 2025188 PMAQI
23rd Jul 2025189 PMAQI
23rd Jul 20251610 PMAQI
23rd Jul 20251711 PMAQI
24th Jul 20251812 AMAQI
24th Jul 2025181 AMAQI
24th Jul 2025172 AMAQI
24th Jul 2025153 AMAQI
24th Jul 2025154 AMAQI
12°C7/17°C
24th Jul 2025165 AMAQI
24th Jul 2025176 AMAQI
24th Jul 2025177 AMAQI
24th Jul 2025168 AMAQI
24th Jul 2025179 AMAQI
24th Jul 20251710 AMAQI
24th Jul 20251811 AMAQI
24th Jul 20251812 PMAQI
24th Jul 2025171 PMAQI
24th Jul 2025182 PMAQI
24th Jul 2025183 PMAQI
24th Jul 2025184 PMAQI
24th Jul 2025175 PMAQI
24th Jul 2025166 PMAQI
24th Jul 2025177 PMAQI
24th Jul 2025198 PMAQI
24th Jul 2025179 PMAQI
24th Jul 20251810 PMAQI
24th Jul 20251711 PMAQI
25th Jul 20251712 AMAQI
25th Jul 2025181 AMAQI
25th Jul 2025162 AMAQI
25th Jul 2025163 AMAQI
25th Jul 2025164 AMAQI
10°C9/12°C
25th Jul 2025165 AMAQI
25th Jul 2025176 AMAQI
25th Jul 2025187 AMAQI
25th Jul 2025188 AMAQI
25th Jul 2025179 AMAQI
25th Jul 20251710 AMAQI
25th Jul 20251611 AMAQI
25th Jul 20251612 PMAQI
25th Jul 2025161 PMAQI
25th Jul 2025162 PMAQI
25th Jul 2025163 PMAQI
25th Jul 2025164 PMAQI
25th Jul 2025155 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025167 PMAQI
25th Jul 2025188 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20251710 PMAQI
25th Jul 20251711 PMAQI
26th Jul 20251812 AMAQI
26th Jul 2025181 AMAQI
26th Jul 2025172 AMAQI
26th Jul 2025173 AMAQI
26th Jul 2025184 AMAQI
10°C7/14°C
26th Jul 2025185 AMAQI
26th Jul 2025186 AMAQI
26th Jul 2025207 AMAQI
26th Jul 2025188 AMAQI
26th Jul 2025229 AMAQI
26th Jul 20252110 AMAQI
26th Jul 20252111 AMAQI
26th Jul 20252212 PMAQI
26th Jul 2025221 PMAQI
26th Jul 2025222 PMAQI
26th Jul 2025223 PMAQI
26th Jul 2025224 PMAQI
26th Jul 2025205 PMAQI
26th Jul 2025216 PMAQI
26th Jul 2025207 PMAQI
26th Jul 2025228 PMAQI
26th Jul 2025219 PMAQI
26th Jul 20252010 PMAQI
26th Jul 20252011 PMAQI
27th Jul 20252012 AMAQI
27th Jul 2025201 AMAQI
27th Jul 2025202 AMAQI
27th Jul 2025193 AMAQI
27th Jul 2025214 AMAQI
8°C7/10°C
27th Jul 2025205 AMAQI
27th Jul 2025206 AMAQI
27th Jul 2025207 AMAQI
27th Jul 2025198 AMAQI
27th Jul 2025209 AMAQI
27th Jul 20252110 AMAQI
27th Jul 20251911 AMAQI
27th Jul 20252112 PMAQI
27th Jul 2025191 PMAQI
27th Jul 2025202 PMAQI
27th Jul 2025203 PMAQI
27th Jul 2025214 PMAQI
27th Jul 2025215 PMAQI
27th Jul 2025206 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025198 PMAQI
27th Jul 2025209 PMAQI
27th Jul 20252010 PMAQI
27th Jul 20252011 PMAQI
28th Jul 20252112 AMAQI
28th Jul 2025211 AMAQI
28th Jul 2025182 AMAQI
28th Jul 2025193 AMAQI
28th Jul 2025164 AMAQI
10°C8/14°C
28th Jul 2025265 AMAQI
28th Jul 2025186 AMAQI
28th Jul 2025187 AMAQI
28th Jul 2025188 AMAQI
28th Jul 2025179 AMAQI
28th Jul 20251610 AMAQI
28th Jul 20251811 AMAQI
28th Jul 20251612 PMAQI
28th Jul 2025171 PMAQI
28th Jul 2025182 PMAQI
28th Jul 2025183 PMAQI
28th Jul 2025194 PMAQI
28th Jul 2025195 PMAQI
28th Jul 2025196 PMAQI
28th Jul 2025187 PMAQI
28th Jul 2025188 PMAQI
28th Jul 2025209 PMAQI
28th Jul 20252110 PMAQI
28th Jul 20251911 PMAQI
29th Jul 20251912 AMAQI
29th Jul 2025191 AMAQI
29th Jul 2025192 AMAQI
29th Jul 2025183 AMAQI
29th Jul 2025184 AMAQI
7°C7/8°C
29th Jul 2025185 AMAQI
29th Jul 2025206 AMAQI
29th Jul 2025217 AMAQI
29th Jul 2025218 AMAQI
29th Jul 2025219 AMAQI
29th Jul 20252010 AMAQI
29th Jul 20252211 AMAQI
29th Jul 20252112 PMAQI
29th Jul 2025211 PMAQI
29th Jul 2025202 PMAQI
29th Jul 2025203 PMAQI
29th Jul 2025194 PMAQI
29th Jul 2025205 PMAQI
29th Jul 2025206 PMAQI
29th Jul 2025207 PMAQI
29th Jul 2025218 PMAQI
29th Jul 2025209 PMAQI
29th Jul 20252010 PMAQI
29th Jul 20252011 PMAQI
30th Jul 20252012 AMAQI
30th Jul 2025211 AMAQI
30th Jul 2025222 AMAQI
30th Jul 2025213 AMAQI
30th Jul 2025214 AMAQI
9°C6/14°C
30th Jul 2025205 AMAQI
30th Jul 2025216 AMAQI
30th Jul 2025217 AMAQI
30th Jul 2025208 AMAQI
30th Jul 2025239 AMAQI
30th Jul 20252210 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252312 PMAQI
30th Jul 2025221 PMAQI
30th Jul 2025212 PMAQI
30th Jul 2025213 PMAQI
30th Jul 2025204 PMAQI
30th Jul 2025215 PMAQI
30th Jul 2025226 PMAQI
30th Jul 2025227 PMAQI
30th Jul 2025228 PMAQI
30th Jul 2025239 PMAQI
30th Jul 20252310 PMAQI
30th Jul 20252311 PMAQI
31st Jul 20252312 AMAQI
31st Jul 2025231 AMAQI
31st Jul 2025232 AMAQI
31st Jul 2025233 AMAQI
31st Jul 2025224 AMAQI
10°C4/16°C
31st Jul 2025215 AMAQI
31st Jul 2025206 AMAQI
31st Jul 2025217 AMAQI
31st Jul 2025228 AMAQI
31st Jul 2025229 AMAQI
31st Jul 20252210 AMAQI
31st Jul 20252211 AMAQI
31st Jul 20252012 PMAQI
31st Jul 2025201 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025234 PMAQI
31st Jul 2025235 PMAQI
31st Jul 2025226 PMAQI
31st Jul 2025237 PMAQI
31st Jul 2025248 PMAQI
31st Jul 2025249 PMAQI
31st Jul 20252410 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252212 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025252 AMAQI
1st Aug 2025223 AMAQI
1st Aug 2025204 AMAQI
11°C5/16°C
1st Aug 2025225 AMAQI
1st Aug 2025226 AMAQI
1st Aug 2025217 AMAQI
1st Aug 2025228 AMAQI
1st Aug 2025219 AMAQI
1st Aug 20252210 AMAQI
1st Aug 20252211 AMAQI
1st Aug 20252212 PMAQI
1st Aug 2025231 PMAQI
1st Aug 2025242 PMAQI
1st Aug 2025243 PMAQI
1st Aug 2025244 PMAQI
1st Aug 2025235 PMAQI
1st Aug 2025246 PMAQI
1st Aug 2025257 PMAQI
1st Aug 2025258 PMAQI
1st Aug 2025249 PMAQI
1st Aug 20252210 PMAQI
1st Aug 20252311 PMAQI
2nd Aug 20252412 AMAQI
2nd Aug 2025231 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025233 AMAQI
2nd Aug 2025244 AMAQI
11°C7/16°C
2nd Aug 2025225 AMAQI
2nd Aug 2025236 AMAQI
2nd Aug 2025227 AMAQI
2nd Aug 2025188 AMAQI
2nd Aug 2025199 AMAQI
2nd Aug 20251710 AMAQI
2nd Aug 20252011 AMAQI
2nd Aug 20252012 PMAQI
2nd Aug 2025221 PMAQI
2nd Aug 2025222 PMAQI
2nd Aug 2025223 PMAQI
2nd Aug 2025224 PMAQI
2nd Aug 2025225 PMAQI
2nd Aug 2025226 PMAQI
2nd Aug 2025247 PMAQI
2nd Aug 2025218 PMAQI
2nd Aug 2025219 PMAQI
2nd Aug 20252410 PMAQI
2nd Aug 20252911 PMAQI
3rd Aug 20252412 AMAQI
--°C/°C
5 AM
1 PM
9 PM
1 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
9 AM - 9 PM
26AQI
13 hours / Day
390 hours / Month
Avg. Lowest Time
5 AM - 9 PM
26AQI
17 hours / Day
510 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 9 PM (Avg. 26), while the lowest AQI was between 5 AM to 9 PM (Avg. 26).
Night time
Avg. Highest Time
12 AM - 4 AM
26AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
10 PM - 11 PM
25AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 4 AM (Avg. 26), while the lowest AQI was between 10 PM to 11 PM (Avg. 25).
2025 Days Vs Air Quality
Chi, Chur, Graubunden, Switzerland
2025
75%
159
25%
54
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
159 DaysModerate
54 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 214 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Chi, Chur, Graubunden, Switzerland
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
67AQI
67AQI
2nd January 2025
67AQI
67AQI
3rd January 2025
60AQI
60AQI
4th January 2025
59AQI
59AQI
5th January 2025
58AQI
58AQI
6th January 2025
53AQI
53AQI
7th January 2025
47AQI
47AQI
8th January 2025
42AQI
42AQI
9th January 2025
35AQI
35AQI
10th January 2025
32AQI
32AQI
11th January 2025
35AQI
35AQI
12th January 2025
36AQI
36AQI
13th January 2025
43AQI
43AQI
14th January 2025
51AQI
51AQI
15th January 2025
56AQI
56AQI
16th January 2025
56AQI
56AQI
17th January 2025
58AQI
58AQI
18th January 2025
59AQI
59AQI
19th January 2025
61AQI
61AQI
20th January 2025
61AQI
61AQI
21st January 2025
61AQI
61AQI
22nd January 2025
60AQI
60AQI
23rd January 2025
57AQI
57AQI
24th January 2025
55AQI
55AQI
25th January 2025
51AQI
51AQI
26th January 2025
45AQI
45AQI
27th January 2025
39AQI
39AQI
28th January 2025
36AQI
36AQI
29th January 2025
32AQI
32AQI
30th January 2025
33AQI
33AQI
31st January 2025
33AQI
33AQI
1st February 2025
39AQI
39AQI
2nd February 2025
46AQI
46AQI
3rd February 2025
48AQI
48AQI
4th February 2025
53AQI
53AQI
5th February 2025
57AQI
57AQI
6th February 2025
59AQI
59AQI
7th February 2025
58AQI
58AQI
8th February 2025
58AQI
58AQI
9th February 2025
58AQI
58AQI
10th February 2025
62AQI
62AQI
11th February 2025
65AQI
65AQI
12th February 2025
64AQI
64AQI
13th February 2025
61AQI
61AQI
14th February 2025
58AQI
58AQI
15th February 2025
60AQI
60AQI
16th February 2025
61AQI
61AQI
17th February 2025
61AQI
61AQI
18th February 2025
63AQI
63AQI
19th February 2025
65AQI
65AQI
20th February 2025
66AQI
66AQI
21st February 2025
63AQI
63AQI
22nd February 2025
60AQI
60AQI
23rd February 2025
59AQI
59AQI
24th February 2025
57AQI
57AQI
25th February 2025
55AQI
55AQI
26th February 2025
52AQI
52AQI
27th February 2025
47AQI
47AQI
28th February 2025
42AQI
42AQI
1st March 2025
42AQI
42AQI
2nd March 2025
44AQI
44AQI
3rd March 2025
45AQI
45AQI
4th March 2025
48AQI
48AQI
5th March 2025
51AQI
51AQI
6th March 2025
51AQI
51AQI
7th March 2025
52AQI
52AQI
8th March 2025
52AQI
52AQI
9th March 2025
51AQI
51AQI
10th March 2025
49AQI
49AQI
11th March 2025
47AQI
47AQI
12th March 2025
44AQI
44AQI
13th March 2025
40AQI
40AQI
14th March 2025
37AQI
37AQI
15th March 2025
36AQI
36AQI
16th March 2025
34AQI
34AQI
17th March 2025
34AQI
34AQI
18th March 2025
36AQI
36AQI
19th March 2025
38AQI
38AQI
20th March 2025
39AQI
39AQI
21st March 2025
38AQI
38AQI
22nd March 2025
38AQI
38AQI
23rd March 2025
35AQI
35AQI
24th March 2025
33AQI
33AQI
25th March 2025
31AQI
31AQI
26th March 2025
34AQI
34AQI
27th March 2025
35AQI
35AQI
28th March 2025
35AQI
35AQI
29th March 2025
38AQI
38AQI
30th March 2025
35AQI
35AQI
31st March 2025
32AQI
32AQI
1st April 2025
31AQI
31AQI
2nd April 2025
31AQI
31AQI
3rd April 2025
33AQI
33AQI
4th April 2025
34AQI
34AQI
5th April 2025
30AQI
30AQI
6th April 2025
26AQI
26AQI
7th April 2025
24AQI
24AQI
8th April 2025
27AQI
27AQI
9th April 2025
31AQI
31AQI
10th April 2025
33AQI
33AQI
11th April 2025
32AQI
32AQI
12th April 2025
29AQI
29AQI
13th April 2025
32AQI
32AQI
14th April 2025
28AQI
28AQI
15th April 2025
28AQI
28AQI
16th April 2025
23AQI
23AQI
17th April 2025
21AQI
21AQI
18th April 2025
17AQI
17AQI
19th April 2025
19AQI
19AQI
20th April 2025
19AQI
19AQI
21st April 2025
16AQI
16AQI
22nd April 2025
16AQI
16AQI
23rd April 2025
20AQI
20AQI
24th April 2025
16AQI
16AQI
25th April 2025
16AQI
16AQI
26th April 2025
19AQI
19AQI
27th April 2025
24AQI
24AQI
28th April 2025
26AQI
26AQI
29th April 2025
27AQI
27AQI
30th April 2025
27AQI
27AQI
1st May 2025
32AQI
32AQI
2nd May 2025
44AQI
44AQI
3rd May 2025
40AQI
40AQI
4th May 2025
36AQI
36AQI
5th May 2025
22AQI
22AQI
6th May 2025
21AQI
21AQI
7th May 2025
25AQI
25AQI
8th May 2025
33AQI
33AQI
9th May 2025
40AQI
40AQI
10th May 2025
30AQI
30AQI
11th May 2025
26AQI
26AQI
12th May 2025
24AQI
24AQI
13th May 2025
25AQI
25AQI
14th May 2025
28AQI
28AQI
15th May 2025
32AQI
32AQI
16th May 2025
25AQI
25AQI
17th May 2025
23AQI
23AQI
18th May 2025
28AQI
28AQI
19th May 2025
29AQI
29AQI
20th May 2025
36AQI
36AQI
21st May 2025
36AQI
36AQI
22nd May 2025
28AQI
28AQI
23rd May 2025
23AQI
23AQI
24th May 2025
22AQI
22AQI
25th May 2025
21AQI
21AQI
26th May 2025
21AQI
21AQI
27th May 2025
20AQI
20AQI
28th May 2025
21AQI
21AQI
29th May 2025
23AQI
23AQI
30th May 2025
40AQI
40AQI
31st May 2025
32AQI
32AQI
1st June 2025
35AQI
35AQI
2nd June 2025
37AQI
37AQI
3rd June 2025
36AQI
36AQI
4th June 2025
39AQI
39AQI
5th June 2025
41AQI
41AQI
6th June 2025
41AQI
41AQI
7th June 2025
34AQI
34AQI
8th June 2025
42AQI
42AQI
9th June 2025
58AQI
58AQI
10th June 2025
61AQI
61AQI
11th June 2025
65AQI
65AQI
12th June 2025
63AQI
63AQI
13th June 2025
58AQI
58AQI
14th June 2025
55AQI
55AQI
15th June 2025
54AQI
54AQI
16th June 2025
47AQI
47AQI
17th June 2025
38AQI
38AQI
18th June 2025
42AQI
42AQI
19th June 2025
45AQI
45AQI
20th June 2025
51AQI
51AQI
21st June 2025
46AQI
46AQI
22nd June 2025
48AQI
48AQI
23rd June 2025
44AQI
44AQI
24th June 2025
42AQI
42AQI
25th June 2025
46AQI
46AQI
26th June 2025
48AQI
48AQI
27th June 2025
37AQI
37AQI
28th June 2025
37AQI
37AQI
29th June 2025
39AQI
39AQI
30th June 2025
41AQI
41AQI
1st July 2025
37AQI
37AQI
2nd July 2025
33AQI
33AQI
3rd July 2025
35AQI
35AQI
4th July 2025
38AQI
38AQI
5th July 2025
38AQI
38AQI
6th July 2025
43AQI
43AQI
7th July 2025
28AQI
28AQI
8th July 2025
21AQI
21AQI
9th July 2025
20AQI
20AQI
10th July 2025
29AQI
29AQI
11th July 2025
31AQI
31AQI
12th July 2025
34AQI
34AQI
13th July 2025
47AQI
47AQI
14th July 2025
35AQI
35AQI
15th July 2025
28AQI
28AQI
16th July 2025
28AQI
28AQI
17th July 2025
23AQI
23AQI
18th July 2025
21AQI
21AQI
19th July 2025
24AQI
24AQI
20th July 2025
26AQI
26AQI
21st July 2025
22AQI
22AQI
22nd July 2025
17AQI
17AQI
23rd July 2025
17AQI
17AQI
24th July 2025
17AQI
17AQI
25th July 2025
17AQI
17AQI
26th July 2025
20AQI
20AQI
27th July 2025
20AQI
20AQI
28th July 2025
19AQI
19AQI
29th July 2025
20AQI
20AQI
30th July 2025
22AQI
22AQI
31st July 2025
22AQI
22AQI
1st August 2025
23AQI
23AQI
50AQI
57AQI
40AQI
25AQI
29AQI
46AQI
27AQI
23AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202539AQI
13
18
5
23
26
5
30
31
22
8
31
1
159
54
Highest AQI recorded in
February57AQI
Lowest AQI recorded in
August23AQI
202426AQI
31
29
29
2
30
30
1
29
1
31
31
30
31
30
21
10
352
14
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
October18AQI
202323AQI
31
28
31
30
31
30
31
31
30
29
29
31
362
Highest AQI recorded in
June36AQI
Lowest AQI recorded in
November16AQI
202224AQI
31
21
28
3
30
31
30
23
2
29
31
30
31
317
3
Highest AQI recorded in
March36AQI
Lowest AQI recorded in
November17AQI
202123AQI
30
25
2
1
31
30
31
29
1
31
31
30
31
30
31
360
3
1
Highest AQI recorded in
June30AQI
Lowest AQI recorded in
November16AQI
202022AQI
13
21
18
30
31
31
30
30
28
31
263
Highest AQI recorded in
April31AQI
Lowest AQI recorded in
October14AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
39AQILeast Polluted Year Recorded
2020(Avg.)
22AQIChi's annual 2025 AQI (39) shows an average percentage change of 64.6% (worsened AQI) compared to previous years: 2020 (22), 2021 (23), 2022 (24), 2023 (23), 2024 (26).
