Watertown, South Dakota, United States 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
Watertown, South Dakota, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Aug 2025
132AQILowest AQI recorded on
14th Aug 2023
18AQISame Day Analysis (11th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 88 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 11th Aug - 12th Aug 2025
Watertown, South Dakota, United States
AQI
Day
Night
.
6 AM11th Aug 2025
9 PM
5 AM12th Aug 2025
Day time
Avg. Highest Time
2PM11th Aug
101AQI
Avg. Lowest Time
6AM11th Aug
67AQI
Night time
Avg. Highest Time
10PM11th Aug
70AQI
Avg. Lowest Time
1AM12th Aug
57AQI
In the last 24 hours,
Watertown's AQI reached its highest point of 101 at 2 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Watertown, South Dakota, United States
JulAug
13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th
Day
Night
13th Jul 2025766 AMAQI
13th Jul 2025727 AMAQI
13th Jul 2025718 AMAQI
13th Jul 2025659 AMAQI
13th Jul 20256510 AMAQI
13th Jul 20256011 AMAQI
13th Jul 20255412 PMAQI
13th Jul 2025531 PMAQI
13th Jul 2025552 PMAQI
13th Jul 2025603 PMAQI
13th Jul 2025594 PMAQI
13th Jul 2025595 PMAQI
13th Jul 2025606 PMAQI
13th Jul 2025697 PMAQI
13th Jul 2025688 PMAQI
13th Jul 2025609 PMAQI
13th Jul 20256110 PMAQI
13th Jul 20255811 PMAQI
14th Jul 20255412 AMAQI
14th Jul 2025531 AMAQI
14th Jul 2025312 AMAQI
14th Jul 2025283 AMAQI
14th Jul 2025224 AMAQI
14th Jul 2025255 AMAQI
23°C14/32°C
14th Jul 2025306 AMAQI
14th Jul 2025367 AMAQI
14th Jul 2025398 AMAQI
14th Jul 2025439 AMAQI
14th Jul 20254410 AMAQI
14th Jul 20254411 AMAQI
14th Jul 20254112 PMAQI
14th Jul 2025441 PMAQI
14th Jul 2025482 PMAQI
14th Jul 2025493 PMAQI
14th Jul 2025484 PMAQI
14th Jul 2025495 PMAQI
14th Jul 2025506 PMAQI
14th Jul 2025457 PMAQI
14th Jul 2025458 PMAQI
14th Jul 2025459 PMAQI
14th Jul 20254710 PMAQI
14th Jul 20254311 PMAQI
15th Jul 20254512 AMAQI
15th Jul 2025451 AMAQI
15th Jul 2025362 AMAQI
15th Jul 2025343 AMAQI
15th Jul 2025344 AMAQI
15th Jul 2025355 AMAQI
26°C17/34°C
15th Jul 2025376 AMAQI
15th Jul 2025407 AMAQI
15th Jul 2025408 AMAQI
15th Jul 2025449 AMAQI
15th Jul 20254410 AMAQI
15th Jul 20254811 AMAQI
15th Jul 20254612 PMAQI
15th Jul 2025451 PMAQI
15th Jul 2025442 PMAQI
15th Jul 2025433 PMAQI
15th Jul 2025434 PMAQI
15th Jul 2025445 PMAQI
15th Jul 2025456 PMAQI
15th Jul 2025457 PMAQI
15th Jul 2025478 PMAQI
15th Jul 2025469 PMAQI
15th Jul 20254710 PMAQI
15th Jul 20254911 PMAQI
16th Jul 20255112 AMAQI
16th Jul 2025541 AMAQI
16th Jul 2025622 AMAQI
16th Jul 2025613 AMAQI
16th Jul 2025644 AMAQI
16th Jul 2025635 AMAQI
24°C16/34°C
16th Jul 2025606 AMAQI
16th Jul 2025577 AMAQI
16th Jul 2025548 AMAQI
16th Jul 2025489 AMAQI
16th Jul 20254410 AMAQI
16th Jul 20254311 AMAQI
16th Jul 20254412 PMAQI
16th Jul 2025441 PMAQI
16th Jul 2025442 PMAQI
16th Jul 2025493 PMAQI
16th Jul 2025494 PMAQI
16th Jul 2025505 PMAQI
16th Jul 2025496 PMAQI
16th Jul 2025507 PMAQI
16th Jul 2025488 PMAQI
16th Jul 2025479 PMAQI
16th Jul 20254810 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254612 AMAQI
17th Jul 2025401 AMAQI
17th Jul 2025272 AMAQI
17th Jul 2025253 AMAQI
17th Jul 2025224 AMAQI
17th Jul 2025205 AMAQI
16°C12/19°C
17th Jul 2025236 AMAQI
17th Jul 2025247 AMAQI
17th Jul 2025298 AMAQI
17th Jul 2025269 AMAQI
17th Jul 20252910 AMAQI
17th Jul 20253311 AMAQI
17th Jul 20252812 PMAQI
17th Jul 2025251 PMAQI
17th Jul 2025262 PMAQI
17th Jul 2025283 PMAQI
17th Jul 2025274 PMAQI
17th Jul 2025285 PMAQI
17th Jul 2025286 PMAQI
17th Jul 2025297 PMAQI
17th Jul 2025298 PMAQI
17th Jul 2025279 PMAQI
17th Jul 20252510 PMAQI
17th Jul 20252611 PMAQI
18th Jul 20252112 AMAQI
18th Jul 2025201 AMAQI
18th Jul 2025182 AMAQI
18th Jul 2025173 AMAQI
18th Jul 2025194 AMAQI
18th Jul 2025185 AMAQI
17°C9/22°C
18th Jul 2025206 AMAQI
18th Jul 2025207 AMAQI
18th Jul 2025198 AMAQI
18th Jul 2025209 AMAQI
18th Jul 20252010 AMAQI
18th Jul 20252011 AMAQI
18th Jul 20251912 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025202 PMAQI
18th Jul 2025233 PMAQI
18th Jul 2025244 PMAQI
18th Jul 2025245 PMAQI
18th Jul 2025216 PMAQI
18th Jul 2025207 PMAQI
18th Jul 2025218 PMAQI
18th Jul 2025239 PMAQI
18th Jul 20252310 PMAQI
18th Jul 20252411 PMAQI
19th Jul 20252412 AMAQI
19th Jul 2025241 AMAQI
19th Jul 2025202 AMAQI
19th Jul 2025213 AMAQI
19th Jul 2025194 AMAQI
19th Jul 2025225 AMAQI
20°C13/26°C
19th Jul 2025266 AMAQI
19th Jul 2025247 AMAQI
19th Jul 2025228 AMAQI
19th Jul 2025229 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252011 AMAQI
19th Jul 20251912 PMAQI
19th Jul 2025191 PMAQI
19th Jul 2025202 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025234 PMAQI
19th Jul 2025225 PMAQI
19th Jul 2025236 PMAQI
19th Jul 2025237 PMAQI
19th Jul 2025228 PMAQI
19th Jul 2025239 PMAQI
19th Jul 20252310 PMAQI
19th Jul 20252211 PMAQI
20th Jul 20252212 AMAQI
20th Jul 2025211 AMAQI
20th Jul 2025192 AMAQI
20th Jul 2025183 AMAQI
20th Jul 2025174 AMAQI
20th Jul 2025195 AMAQI
19°C15/24°C
20th Jul 2025186 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025208 AMAQI
20th Jul 2025219 AMAQI
20th Jul 20252010 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252112 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025242 PMAQI
20th Jul 2025233 PMAQI
20th Jul 2025234 PMAQI
20th Jul 2025235 PMAQI
20th Jul 2025236 PMAQI
20th Jul 2025207 PMAQI
20th Jul 2025228 PMAQI
20th Jul 2025269 PMAQI
20th Jul 20252510 PMAQI
20th Jul 20252711 PMAQI
21st Jul 20253212 AMAQI
21st Jul 2025341 AMAQI
21st Jul 2025342 AMAQI
21st Jul 2025293 AMAQI
21st Jul 2025304 AMAQI
21st Jul 2025345 AMAQI
20°C13/28°C
21st Jul 2025316 AMAQI
21st Jul 2025307 AMAQI
21st Jul 2025278 AMAQI
21st Jul 2025259 AMAQI
21st Jul 20252410 AMAQI
21st Jul 20252411 AMAQI
21st Jul 20252812 PMAQI
21st Jul 2025231 PMAQI
21st Jul 2025242 PMAQI
21st Jul 2025273 PMAQI
21st Jul 2025284 PMAQI
21st Jul 2025275 PMAQI
21st Jul 2025276 PMAQI
21st Jul 2025277 PMAQI
21st Jul 2025278 PMAQI
21st Jul 2025269 PMAQI
21st Jul 20252810 PMAQI
21st Jul 20252711 PMAQI
22nd Jul 20252712 AMAQI
22nd Jul 2025251 AMAQI
22nd Jul 2025262 AMAQI
22nd Jul 2025263 AMAQI
22nd Jul 2025264 AMAQI
22nd Jul 2025215 AMAQI
24°C20/30°C
22nd Jul 2025226 AMAQI
22nd Jul 2025237 AMAQI
22nd Jul 2025228 AMAQI
22nd Jul 2025239 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20252112 PMAQI
22nd Jul 2025211 PMAQI
22nd Jul 2025242 PMAQI
22nd Jul 2025243 PMAQI
22nd Jul 2025224 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025237 PMAQI
22nd Jul 2025238 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252611 PMAQI
23rd Jul 20252812 AMAQI
23rd Jul 2025291 AMAQI
23rd Jul 2025262 AMAQI
23rd Jul 2025283 AMAQI
23rd Jul 2025314 AMAQI
23rd Jul 2025255 AMAQI
27°C22/33°C
23rd Jul 2025236 AMAQI
23rd Jul 2025257 AMAQI
23rd Jul 2025278 AMAQI
23rd Jul 2025289 AMAQI
23rd Jul 20253010 AMAQI
23rd Jul 20253411 AMAQI
23rd Jul 20252912 PMAQI
23rd Jul 2025231 PMAQI
23rd Jul 2025232 PMAQI
23rd Jul 2025263 PMAQI
23rd Jul 2025284 PMAQI
23rd Jul 2025255 PMAQI
23rd Jul 2025266 PMAQI
23rd Jul 2025267 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252311 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025202 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025324 AMAQI
24th Jul 2025355 AMAQI
24°C19/27°C
24th Jul 2025346 AMAQI
24th Jul 2025357 AMAQI
24th Jul 2025398 AMAQI
24th Jul 2025589 AMAQI
24th Jul 20256810 AMAQI
24th Jul 20256911 AMAQI
24th Jul 20256012 PMAQI
24th Jul 2025621 PMAQI
24th Jul 2025572 PMAQI
24th Jul 2025533 PMAQI
24th Jul 2025514 PMAQI
24th Jul 2025525 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025457 PMAQI
24th Jul 2025488 PMAQI
24th Jul 2025519 PMAQI
24th Jul 20255210 PMAQI
24th Jul 20255211 PMAQI
25th Jul 20255012 AMAQI
25th Jul 2025511 AMAQI
25th Jul 2025582 AMAQI
25th Jul 2025583 AMAQI
25th Jul 2025544 AMAQI
25th Jul 2025535 AMAQI
23°C17/29°C
25th Jul 2025496 AMAQI
25th Jul 2025507 AMAQI
25th Jul 2025508 AMAQI
25th Jul 2025479 AMAQI
25th Jul 20254510 AMAQI
25th Jul 20254311 AMAQI
25th Jul 20254312 PMAQI
25th Jul 2025441 PMAQI
25th Jul 2025442 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025454 PMAQI
25th Jul 2025465 PMAQI
25th Jul 2025456 PMAQI
25th Jul 2025487 PMAQI
25th Jul 2025498 PMAQI
25th Jul 2025469 PMAQI
25th Jul 20254410 PMAQI
25th Jul 20254311 PMAQI
26th Jul 20254712 AMAQI
26th Jul 2025511 AMAQI
26th Jul 2025332 AMAQI
26th Jul 2025323 AMAQI
26th Jul 2025334 AMAQI
26th Jul 2025305 AMAQI
24°C17/30°C
26th Jul 2025346 AMAQI
26th Jul 2025407 AMAQI
26th Jul 2025368 AMAQI
26th Jul 2025359 AMAQI
26th Jul 20253510 AMAQI
26th Jul 20253311 AMAQI
26th Jul 20253912 PMAQI
26th Jul 2025351 PMAQI
26th Jul 2025332 PMAQI
26th Jul 2025353 PMAQI
26th Jul 2025364 PMAQI
26th Jul 2025375 PMAQI
26th Jul 2025386 PMAQI
26th Jul 2025377 PMAQI
26th Jul 2025338 PMAQI
26th Jul 2025339 PMAQI
26th Jul 20253510 PMAQI
26th Jul 20253611 PMAQI
27th Jul 20253412 AMAQI
27th Jul 2025321 AMAQI
27th Jul 2025282 AMAQI
27th Jul 2025283 AMAQI
27th Jul 2025284 AMAQI
27th Jul 2025295 AMAQI
26°C21/33°C
27th Jul 2025286 AMAQI
27th Jul 2025317 AMAQI
27th Jul 2025298 AMAQI
27th Jul 2025309 AMAQI
27th Jul 20253010 AMAQI
27th Jul 20252911 AMAQI
27th Jul 20252812 PMAQI
27th Jul 2025291 PMAQI
27th Jul 2025302 PMAQI
27th Jul 2025323 PMAQI
27th Jul 2025314 PMAQI
27th Jul 2025325 PMAQI
27th Jul 2025326 PMAQI
27th Jul 2025297 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025319 PMAQI
27th Jul 20253110 PMAQI
27th Jul 20253211 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025291 AMAQI
28th Jul 2025272 AMAQI
28th Jul 2025293 AMAQI
28th Jul 2025314 AMAQI
28th Jul 2025295 AMAQI
28°C21/36°C
28th Jul 2025296 AMAQI
28th Jul 2025317 AMAQI
28th Jul 2025308 AMAQI
28th Jul 2025319 AMAQI
28th Jul 20253110 AMAQI
28th Jul 20253111 AMAQI
28th Jul 20253112 PMAQI
28th Jul 2025311 PMAQI
28th Jul 2025312 PMAQI
28th Jul 2025333 PMAQI
28th Jul 2025324 PMAQI
28th Jul 2025335 PMAQI
28th Jul 2025336 PMAQI
28th Jul 2025317 PMAQI
28th Jul 2025318 PMAQI
28th Jul 2025339 PMAQI
28th Jul 20253410 PMAQI
28th Jul 20253411 PMAQI
29th Jul 20253312 AMAQI
29th Jul 2025331 AMAQI
29th Jul 2025282 AMAQI
29th Jul 2025273 AMAQI
29th Jul 2025274 AMAQI
29th Jul 2025275 AMAQI
25°C19/34°C
29th Jul 2025286 AMAQI
29th Jul 2025277 AMAQI
29th Jul 2025298 AMAQI
29th Jul 2025299 AMAQI
29th Jul 20252910 AMAQI
29th Jul 20252811 AMAQI
29th Jul 20252912 PMAQI
29th Jul 2025331 PMAQI
29th Jul 2025322 PMAQI
29th Jul 2025333 PMAQI
29th Jul 2025334 PMAQI
29th Jul 2025335 PMAQI
29th Jul 2025336 PMAQI
29th Jul 2025327 PMAQI
29th Jul 2025318 PMAQI
29th Jul 2025349 PMAQI
29th Jul 20253310 PMAQI
29th Jul 20253311 PMAQI
30th Jul 20253112 AMAQI
30th Jul 2025331 AMAQI
30th Jul 2025392 AMAQI
30th Jul 2025383 AMAQI
30th Jul 2025394 AMAQI
30th Jul 2025445 AMAQI
22°C18/27°C
30th Jul 2025506 AMAQI
30th Jul 2025587 AMAQI
30th Jul 2025668 AMAQI
30th Jul 2025729 AMAQI
30th Jul 20257810 AMAQI
30th Jul 20257611 AMAQI
30th Jul 20257012 PMAQI
30th Jul 2025681 PMAQI
30th Jul 2025752 PMAQI
30th Jul 2025763 PMAQI
30th Jul 2025764 PMAQI
30th Jul 2025765 PMAQI
30th Jul 2025766 PMAQI
30th Jul 2025767 PMAQI
30th Jul 2025768 PMAQI
30th Jul 2025759 PMAQI
30th Jul 20257710 PMAQI
30th Jul 20257511 PMAQI
31st Jul 20258312 AMAQI
31st Jul 2025781 AMAQI
31st Jul 2025912 AMAQI
31st Jul 2025903 AMAQI
31st Jul 2025924 AMAQI
31st Jul 2025935 AMAQI
21°C17/26°C
31st Jul 20251026 AMAQI
31st Jul 2025997 AMAQI
31st Jul 20251008 AMAQI
31st Jul 2025989 AMAQI
31st Jul 202510710 AMAQI
31st Jul 202510711 AMAQI
31st Jul 202510012 PMAQI
31st Jul 20251091 PMAQI
31st Jul 20251022 PMAQI
31st Jul 20251003 PMAQI
31st Jul 20251014 PMAQI
31st Jul 20251025 PMAQI
31st Jul 2025966 PMAQI
31st Jul 20251037 PMAQI
31st Jul 20251028 PMAQI
31st Jul 2025939 PMAQI
31st Jul 20259210 PMAQI
31st Jul 20259011 PMAQI
1st Aug 20259412 AMAQI
1st Aug 2025961 AMAQI
1st Aug 2025992 AMAQI
1st Aug 2025943 AMAQI
1st Aug 2025914 AMAQI
1st Aug 2025845 AMAQI
18°C12/24°C
1st Aug 2025956 AMAQI
1st Aug 2025957 AMAQI
1st Aug 20251028 AMAQI
1st Aug 20251039 AMAQI
1st Aug 202510110 AMAQI
1st Aug 202510911 AMAQI
1st Aug 202511012 PMAQI
1st Aug 20251121 PMAQI
1st Aug 20251062 PMAQI
1st Aug 20251083 PMAQI
1st Aug 20251004 PMAQI
1st Aug 20251035 PMAQI
1st Aug 2025986 PMAQI
1st Aug 2025997 PMAQI
1st Aug 20251008 PMAQI
1st Aug 20251009 PMAQI
1st Aug 20259410 PMAQI
1st Aug 202510411 PMAQI
2nd Aug 202510012 AMAQI
2nd Aug 20251081 AMAQI
2nd Aug 2025932 AMAQI
2nd Aug 2025923 AMAQI
2nd Aug 2025974 AMAQI
2nd Aug 2025925 AMAQI
19°C12/24°C
2nd Aug 2025986 AMAQI
2nd Aug 2025927 AMAQI
2nd Aug 2025928 AMAQI
2nd Aug 2025929 AMAQI
2nd Aug 20258810 AMAQI
2nd Aug 20258411 AMAQI
2nd Aug 20258212 PMAQI
2nd Aug 2025821 PMAQI
2nd Aug 2025792 PMAQI
2nd Aug 2025763 PMAQI
2nd Aug 2025754 PMAQI
2nd Aug 2025795 PMAQI
2nd Aug 2025726 PMAQI
2nd Aug 2025937 PMAQI
2nd Aug 2025858 PMAQI
2nd Aug 2025799 PMAQI
2nd Aug 20257610 PMAQI
2nd Aug 20257611 PMAQI
3rd Aug 20257812 AMAQI
3rd Aug 2025801 AMAQI
3rd Aug 2025822 AMAQI
3rd Aug 2025803 AMAQI
3rd Aug 2025804 AMAQI
3rd Aug 2025775 AMAQI
18°C11/25°C
3rd Aug 2025786 AMAQI
3rd Aug 2025877 AMAQI
3rd Aug 2025858 AMAQI
3rd Aug 2025749 AMAQI
3rd Aug 20257210 AMAQI
3rd Aug 20257411 AMAQI
3rd Aug 20257212 PMAQI
3rd Aug 2025711 PMAQI
3rd Aug 2025712 PMAQI
3rd Aug 2025723 PMAQI
3rd Aug 2025764 PMAQI
3rd Aug 2025755 PMAQI
3rd Aug 2025746 PMAQI
3rd Aug 2025737 PMAQI
3rd Aug 2025748 PMAQI
3rd Aug 2025849 PMAQI
3rd Aug 20258110 PMAQI
3rd Aug 20258011 PMAQI
4th Aug 20257812 AMAQI
4th Aug 2025761 AMAQI
4th Aug 2025732 AMAQI
4th Aug 2025743 AMAQI
4th Aug 2025764 AMAQI
4th Aug 2025755 AMAQI
18°C16/21°C
4th Aug 2025726 AMAQI
4th Aug 2025727 AMAQI
4th Aug 2025748 AMAQI
4th Aug 2025729 AMAQI
4th Aug 20257610 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20257912 PMAQI
4th Aug 2025741 PMAQI
4th Aug 2025742 PMAQI
4th Aug 2025753 PMAQI
4th Aug 2025744 PMAQI
4th Aug 2025705 PMAQI
4th Aug 2025706 PMAQI
4th Aug 2025777 PMAQI
4th Aug 2025748 PMAQI
4th Aug 2025719 PMAQI
4th Aug 20257410 PMAQI
4th Aug 20256911 PMAQI
5th Aug 20256912 AMAQI
5th Aug 2025691 AMAQI
5th Aug 2025642 AMAQI
5th Aug 2025603 AMAQI
5th Aug 2025614 AMAQI
5th Aug 2025605 AMAQI
19°C16/22°C
5th Aug 2025626 AMAQI
5th Aug 2025617 AMAQI
5th Aug 2025638 AMAQI
5th Aug 2025669 AMAQI
5th Aug 20256510 AMAQI
5th Aug 20256411 AMAQI
5th Aug 20256512 PMAQI
5th Aug 2025671 PMAQI
5th Aug 2025682 PMAQI
5th Aug 2025683 PMAQI
5th Aug 2025694 PMAQI
5th Aug 2025685 PMAQI
5th Aug 2025626 PMAQI
5th Aug 2025697 PMAQI
5th Aug 2025628 PMAQI
5th Aug 2025589 PMAQI
5th Aug 20255610 PMAQI
5th Aug 20255111 PMAQI
6th Aug 20254812 AMAQI
6th Aug 2025441 AMAQI
6th Aug 2025372 AMAQI
6th Aug 2025323 AMAQI
6th Aug 2025314 AMAQI
6th Aug 2025325 AMAQI
22°C16/28°C
6th Aug 2025316 AMAQI
6th Aug 2025307 AMAQI
6th Aug 2025298 AMAQI
6th Aug 2025299 AMAQI
6th Aug 20253310 AMAQI
6th Aug 20253411 AMAQI
6th Aug 20253612 PMAQI
6th Aug 2025361 PMAQI
6th Aug 2025382 PMAQI
6th Aug 2025373 PMAQI
6th Aug 2025354 PMAQI
6th Aug 2025345 PMAQI
6th Aug 2025326 PMAQI
6th Aug 2025337 PMAQI
6th Aug 2025338 PMAQI
6th Aug 2025349 PMAQI
6th Aug 20253710 PMAQI
6th Aug 20253711 PMAQI
7th Aug 20253712 AMAQI
7th Aug 2025421 AMAQI
7th Aug 2025402 AMAQI
7th Aug 2025373 AMAQI
7th Aug 2025344 AMAQI
7th Aug 2025345 AMAQI
23°C19/27°C
7th Aug 2025366 AMAQI
7th Aug 2025397 AMAQI
7th Aug 2025368 AMAQI
7th Aug 2025379 AMAQI
7th Aug 20253710 AMAQI
7th Aug 20253811 AMAQI
7th Aug 20254012 PMAQI
7th Aug 2025461 PMAQI
7th Aug 2025482 PMAQI
7th Aug 2025463 PMAQI
7th Aug 2025494 PMAQI
7th Aug 2025515 PMAQI
7th Aug 2025526 PMAQI
7th Aug 2025427 PMAQI
7th Aug 2025438 PMAQI
7th Aug 2025509 PMAQI
7th Aug 20255210 PMAQI
7th Aug 20255211 PMAQI
8th Aug 20255012 AMAQI
8th Aug 2025501 AMAQI
8th Aug 2025462 AMAQI
8th Aug 2025543 AMAQI
8th Aug 2025494 AMAQI
8th Aug 2025455 AMAQI
25°C19/31°C
8th Aug 2025486 AMAQI
8th Aug 2025527 AMAQI
8th Aug 2025568 AMAQI
8th Aug 2025479 AMAQI
8th Aug 20254510 AMAQI
8th Aug 20254411 AMAQI
8th Aug 20254112 PMAQI
8th Aug 2025411 PMAQI
8th Aug 2025452 PMAQI
8th Aug 2025483 PMAQI
8th Aug 2025484 PMAQI
8th Aug 2025475 PMAQI
8th Aug 2025506 PMAQI
8th Aug 2025547 PMAQI
8th Aug 2025538 PMAQI
8th Aug 2025519 PMAQI
8th Aug 20255210 PMAQI
8th Aug 20254811 PMAQI
9th Aug 20254612 AMAQI
9th Aug 2025441 AMAQI
9th Aug 2025392 AMAQI
9th Aug 2025333 AMAQI
9th Aug 2025334 AMAQI
9th Aug 2025325 AMAQI
25°C22/27°C
9th Aug 2025336 AMAQI
9th Aug 2025367 AMAQI
9th Aug 2025348 AMAQI
9th Aug 2025349 AMAQI
9th Aug 20253510 AMAQI
9th Aug 20253411 AMAQI
9th Aug 20253312 PMAQI
9th Aug 2025331 PMAQI
9th Aug 2025342 PMAQI
9th Aug 2025363 PMAQI
9th Aug 2025364 PMAQI
9th Aug 2025355 PMAQI
9th Aug 2025356 PMAQI
9th Aug 2025347 PMAQI
9th Aug 2025328 PMAQI
9th Aug 2025329 PMAQI
9th Aug 20253310 PMAQI
9th Aug 20253411 PMAQI
10th Aug 20253312 AMAQI
10th Aug 2025331 AMAQI
10th Aug 2025342 AMAQI
10th Aug 2025333 AMAQI
10th Aug 2025334 AMAQI
10th Aug 2025335 AMAQI
23°C17/29°C
10th Aug 2025346 AMAQI
10th Aug 2025367 AMAQI
10th Aug 2025408 AMAQI
10th Aug 2025459 AMAQI
10th Aug 20254710 AMAQI
10th Aug 20254711 AMAQI
10th Aug 20254612 PMAQI
10th Aug 2025431 PMAQI
10th Aug 2025402 PMAQI
10th Aug 2025403 PMAQI
10th Aug 2025444 PMAQI
10th Aug 2025505 PMAQI
10th Aug 2025536 PMAQI
10th Aug 2025427 PMAQI
10th Aug 2025428 PMAQI
10th Aug 2025539 PMAQI
10th Aug 20254310 PMAQI
10th Aug 20255411 PMAQI
11th Aug 20255912 AMAQI
11th Aug 2025781 AMAQI
11th Aug 2025982 AMAQI
11th Aug 2025753 AMAQI
11th Aug 2025724 AMAQI
11th Aug 2025675 AMAQI
21°C15/27°C
11th Aug 2025676 AMAQI
11th Aug 2025767 AMAQI
11th Aug 2025808 AMAQI
11th Aug 2025719 AMAQI
11th Aug 20257610 AMAQI
11th Aug 20258411 AMAQI
11th Aug 20258312 PMAQI
11th Aug 2025901 PMAQI
11th Aug 20251012 PMAQI
11th Aug 20251013 PMAQI
11th Aug 2025854 PMAQI
11th Aug 2025805 PMAQI
11th Aug 2025696 PMAQI
11th Aug 2025787 PMAQI
11th Aug 2025698 PMAQI
11th Aug 2025659 PMAQI
11th Aug 20257010 PMAQI
11th Aug 20255811 PMAQI
12th Aug 20255812 AMAQI
12th Aug 2025571 AMAQI
12th Aug 2025602 AMAQI
12th Aug 2025623 AMAQI
23°C14/30°C
6 AM
1 PM
9 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 9 PM
48AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
6 AM - 9 PM
48AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 9 PM (Avg. 48), while the lowest AQI was between 6 AM to 9 PM (Avg. 48).
Night time
Avg. Highest Time
12 AM - 11 PM
47AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 5 AM
47AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 47), while the lowest AQI was between 12 AM to 5 AM (Avg. 47).
2025 Days Vs Air Quality
Watertown, South Dakota, United States
2025
84%
187
12%
27
4%
9
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Good
187 DaysModerate
27 DaysPoor
9 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 224 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
Watertown, South Dakota, United States
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
42AQI
42AQI
2nd January 2025
42AQI
42AQI
3rd January 2025
21AQI
21AQI
4th January 2025
19AQI
19AQI
5th January 2025
21AQI
21AQI
6th January 2025
25AQI
25AQI
7th January 2025
25AQI
25AQI
8th January 2025
31AQI
31AQI
9th January 2025
31AQI
31AQI
10th January 2025
21AQI
21AQI
11th January 2025
21AQI
21AQI
12th January 2025
24AQI
24AQI
13th January 2025
23AQI
23AQI
14th January 2025
25AQI
25AQI
15th January 2025
21AQI
21AQI
16th January 2025
36AQI
36AQI
17th January 2025
127AQI
127AQI
18th January 2025
139AQI
139AQI
19th January 2025
120AQI
120AQI
20th January 2025
127AQI
127AQI
21st January 2025
136AQI
136AQI
22nd January 2025
96AQI
96AQI
23rd January 2025
25AQI
25AQI
24th January 2025
23AQI
23AQI
25th January 2025
23AQI
23AQI
26th January 2025
22AQI
22AQI
27th January 2025
22AQI
22AQI
28th January 2025
23AQI
23AQI
29th January 2025
23AQI
23AQI
30th January 2025
24AQI
24AQI
31st January 2025
31AQI
31AQI
1st February 2025
32AQI
32AQI
2nd February 2025
31AQI
31AQI
3rd February 2025
23AQI
23AQI
4th February 2025
22AQI
22AQI
5th February 2025
31AQI
31AQI
6th February 2025
27AQI
27AQI
7th February 2025
25AQI
25AQI
8th February 2025
29AQI
29AQI
9th February 2025
30AQI
30AQI
10th February 2025
36AQI
36AQI
11th February 2025
26AQI
26AQI
12th February 2025
35AQI
35AQI
13th February 2025
36AQI
36AQI
14th February 2025
51AQI
51AQI
15th February 2025
38AQI
38AQI
16th February 2025
25AQI
25AQI
17th February 2025
21AQI
21AQI
18th February 2025
20AQI
20AQI
19th February 2025
20AQI
20AQI
20th February 2025
24AQI
24AQI
21st February 2025
31AQI
31AQI
22nd February 2025
35AQI
35AQI
23rd February 2025
27AQI
27AQI
24th February 2025
21AQI
21AQI
25th February 2025
21AQI
21AQI
26th February 2025
25AQI
25AQI
27th February 2025
23AQI
23AQI
28th February 2025
24AQI
24AQI
1st March 2025
25AQI
25AQI
2nd March 2025
29AQI
29AQI
3rd March 2025
42AQI
42AQI
4th March 2025
34AQI
34AQI
5th March 2025
25AQI
25AQI
6th March 2025
22AQI
22AQI
7th March 2025
26AQI
26AQI
8th March 2025
25AQI
25AQI
9th March 2025
23AQI
23AQI
10th March 2025
24AQI
24AQI
11th March 2025
23AQI
23AQI
12th March 2025
27AQI
27AQI
13th March 2025
42AQI
42AQI
14th March 2025
55AQI
55AQI
15th March 2025
22AQI
22AQI
16th March 2025
17AQI
17AQI
17th March 2025
22AQI
22AQI
18th March 2025
25AQI
25AQI
19th March 2025
24AQI
24AQI
20th March 2025
33AQI
33AQI
21st March 2025
20AQI
20AQI
22nd March 2025
25AQI
25AQI
23rd March 2025
25AQI
25AQI
24th March 2025
26AQI
26AQI
25th March 2025
36AQI
36AQI
26th March 2025
35AQI
35AQI
27th March 2025
31AQI
31AQI
28th March 2025
54AQI
54AQI
29th March 2025
23AQI
23AQI
30th March 2025
19AQI
19AQI
31st March 2025
22AQI
22AQI
1st April 2025
26AQI
26AQI
2nd April 2025
24AQI
24AQI
3rd April 2025
21AQI
21AQI
4th April 2025
30AQI
30AQI
5th April 2025
29AQI
29AQI
6th April 2025
29AQI
29AQI
7th April 2025
21AQI
21AQI
8th April 2025
28AQI
28AQI
9th April 2025
43AQI
43AQI
10th April 2025
28AQI
28AQI
11th April 2025
36AQI
36AQI
12th April 2025
63AQI
63AQI
13th April 2025
49AQI
49AQI
14th April 2025
22AQI
22AQI
15th April 2025
20AQI
20AQI
16th April 2025
43AQI
43AQI
17th April 2025
56AQI
56AQI
18th April 2025
23AQI
23AQI
19th April 2025
28AQI
28AQI
20th April 2025
41AQI
41AQI
21st April 2025
43AQI
43AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
20AQI
20AQI
24th April 2025
26AQI
26AQI
25th April 2025
24AQI
24AQI
26th April 2025
32AQI
32AQI
27th April 2025
30AQI
30AQI
28th April 2025
28AQI
28AQI
29th April 2025
22AQI
22AQI
30th April 2025
36AQI
36AQI
1st May 2025
23AQI
23AQI
2nd May 2025
21AQI
21AQI
3rd May 2025
29AQI
29AQI
4th May 2025
43AQI
43AQI
5th May 2025
47AQI
47AQI
6th May 2025
45AQI
45AQI
7th May 2025
30AQI
30AQI
8th May 2025
47AQI
47AQI
9th May 2025
52AQI
52AQI
10th May 2025
41AQI
41AQI
11th May 2025
60AQI
60AQI
12th May 2025
53AQI
53AQI
13th May 2025
55AQI
55AQI
14th May 2025
52AQI
52AQI
15th May 2025
27AQI
27AQI
16th May 2025
20AQI
20AQI
17th May 2025
17AQI
17AQI
18th May 2025
18AQI
18AQI
19th May 2025
18AQI
18AQI
20th May 2025
14AQI
14AQI
21st May 2025
14AQI
14AQI
22nd May 2025
13AQI
13AQI
23rd May 2025
15AQI
15AQI
24th May 2025
14AQI
14AQI
25th May 2025
16AQI
16AQI
26th May 2025
18AQI
18AQI
27th May 2025
15AQI
15AQI
28th May 2025
24AQI
24AQI
29th May 2025
31AQI
31AQI
30th May 2025
28AQI
28AQI
31st May 2025
95AQI
95AQI
1st June 2025
129AQI
129AQI
2nd June 2025
72AQI
72AQI
3rd June 2025
73AQI
73AQI
4th June 2025
62AQI
62AQI
5th June 2025
53AQI
53AQI
6th June 2025
33AQI
33AQI
7th June 2025
40AQI
40AQI
8th June 2025
61AQI
61AQI
9th June 2025
50AQI
50AQI
10th June 2025
66AQI
66AQI
11th June 2025
77AQI
77AQI
12th June 2025
73AQI
73AQI
13th June 2025
50AQI
50AQI
14th June 2025
23AQI
23AQI
15th June 2025
20AQI
20AQI
16th June 2025
22AQI
22AQI
17th June 2025
23AQI
23AQI
18th June 2025
27AQI
27AQI
19th June 2025
27AQI
27AQI
20th June 2025
26AQI
26AQI
21st June 2025
37AQI
37AQI
22nd June 2025
38AQI
38AQI
23rd June 2025
24AQI
24AQI
24th June 2025
37AQI
37AQI
25th June 2025
33AQI
33AQI
26th June 2025
17AQI
17AQI
27th June 2025
15AQI
15AQI
28th June 2025
15AQI
15AQI
29th June 2025
17AQI
17AQI
30th June 2025
20AQI
20AQI
1st July 2025
22AQI
22AQI
2nd July 2025
25AQI
25AQI
3rd July 2025
30AQI
30AQI
4th July 2025
40AQI
40AQI
5th July 2025
22AQI
22AQI
6th July 2025
36AQI
36AQI
7th July 2025
37AQI
37AQI
8th July 2025
24AQI
24AQI
9th July 2025
30AQI
30AQI
10th July 2025
19AQI
19AQI
11th July 2025
29AQI
29AQI
12th July 2025
49AQI
49AQI
13th July 2025
79AQI
79AQI
14th July 2025
44AQI
44AQI
15th July 2025
39AQI
39AQI
16th July 2025
49AQI
49AQI
17th July 2025
25AQI
25AQI
18th July 2025
21AQI
21AQI
19th July 2025
20AQI
20AQI
20th July 2025
19AQI
19AQI
21st July 2025
24AQI
24AQI
22nd July 2025
26AQI
26AQI
23rd July 2025
29AQI
29AQI
24th July 2025
47AQI
47AQI
25th July 2025
56AQI
56AQI
26th July 2025
26AQI
26AQI
27th July 2025
19AQI
19AQI
28th July 2025
20AQI
20AQI
29th July 2025
22AQI
22AQI
30th July 2025
65AQI
65AQI
31st July 2025
111AQI
111AQI
1st August 2025
132AQI
132AQI
2nd August 2025
115AQI
115AQI
3rd August 2025
80AQI
80AQI
4th August 2025
64AQI
64AQI
5th August 2025
54AQI
54AQI
6th August 2025
23AQI
23AQI
7th August 2025
27AQI
27AQI
8th August 2025
38AQI
38AQI
9th August 2025
19AQI
19AQI
10th August 2025
32AQI
32AQI
11th August 2025
88AQI
88AQI
45AQI
28AQI
28AQI
31AQI
32AQI
42AQI
36AQI
61AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202536AQI
25
1
5
27
1
29
2
28
2
25
6
21
8
1
27
3
1
5
4
2
187
27
9
Highest AQI recorded in
August61AQI
Lowest AQI recorded in
February28AQI
202434AQI
27
27
2
30
1
29
1
26
5
25
3
25
6
26
5
17
13
19
11
1
30
31
312
47
1
Highest AQI recorded in
September50AQI
Lowest AQI recorded in
November22AQI
202342AQI
27
4
28
30
1
20
5
15
14
1
8
22
19
11
1
19
12
12
13
1
29
2
27
2
31
265
86
3
Highest AQI recorded in
June58AQI
Lowest AQI recorded in
October26AQI
202236AQI
30
1
13
3
30
1
28
1
30
1
24
5
1
18
4
1
24
5
24
7
27
3
29
2
278
33
1
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
November32AQI
202140AQI
23
7
23
5
28
3
26
4
27
3
22
8
9
19
1
2
20
9
2
27
3
24
5
28
2
31
288
68
3
2
Highest AQI recorded in
July72AQI
Lowest AQI recorded in
December29AQI
202037AQI
12
1
20
1
18
20
6
1
31
29
2
21
9
27
4
24
6
26
3
2
228
32
3
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
March32AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
42AQILeast Polluted Year Recorded
2024(Avg.)
34AQIWatertown's annual 2025 AQI (36) shows an average percentage change of -4.6% (improved AQI) compared to previous years: 2020 (37), 2021 (40), 2022 (36), 2023 (42), 2024 (34).
