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!
August Air Quality Analysis
Watertown, South Dakota, United States
AQI Trends: Highest and Lowest
Same Day Analysis (16th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 33 of Good air quality on the same day.
Day & Night AQI Trend: 16th Aug - 17th Aug 2026
Watertown, South Dakota, United States
6 AM16th Aug 2026
8 PM
5 AM17th Aug 2026
52AQI
23AQI
46AQI
10AQI
In the last 24 hours,
Watertown's AQI reached its highest point of 52 at 10 AM during the Day, while the lowest point, 10, was recorded at 10 PM during the Night between 16th Aug and 17th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Watertown, South Dakota, United States
24°C16/32°C
27°C22/32°C
21°C16/25°C
19°C12/27°C
20°C12/27°C
23°C19/28°C
28°C18/39°C
29°C21/38°C
29°C21/35°C
27°C20/35°C
27°C21/35°C
24°C22/29°C
21°C18/25°C
21°C15/28°C
23°C16/31°C
24°C19/31°C
17°C12/21°C
18°C9/27°C
21°C13/28°C
21°C17/26°C
20°C11/28°C
22°C17/28°C
21°C13/29°C
23°C18/29°C
24°C18/31°C
22°C19/26°C
20°C17/25°C
24°C20/30°C
23°C15/30°C
21°C12/30°C
52AQI
48AQI
52AQI
47AQI
2026 Days Vs Air Quality
Watertown, South Dakota, United States
81%
183
19%
42
Total number of days with different AQI categories in last 229 days in 2026 (136 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2026, 81% of 229 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 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI (US)
25AQI (US)
32AQI (US)
34AQI (US)
28AQI (US)
27AQI (US)
29AQI (US)
23AQI (US)
31AQI (US)
28AQI (US)
18AQI (US)
27AQI (US)
22AQI (US)
16AQI (US)
17AQI (US)
27AQI (US)
24AQI (US)
30AQI (US)
20AQI (US)
24AQI (US)
37AQI (US)
42AQI (US)
35AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
29AQI (US)
22AQI (US)
26AQI (US)
40AQI (US)
34AQI (US)
34AQI (US)
31AQI (US)
36AQI (US)
41AQI (US)
44AQI (US)
42AQI (US)
32AQI (US)
30AQI (US)
40AQI (US)
46AQI (US)
53AQI (US)
76AQI (US)
52AQI (US)
49AQI (US)
50AQI (US)
45AQI (US)
32AQI (US)
36AQI (US)
33AQI (US)
27AQI (US)
26AQI (US)
33AQI (US)
29AQI (US)
39AQI (US)
26AQI (US)
38AQI (US)
26AQI (US)
27AQI (US)
35AQI (US)
45AQI (US)
64AQI (US)
55AQI (US)
67AQI (US)
36AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
24AQI (US)
43AQI (US)
44AQI (US)
26AQI (US)
34AQI (US)
21AQI (US)
21AQI (US)
27AQI (US)
46AQI (US)
46AQI (US)
60AQI (US)
44AQI (US)
30AQI (US)
28AQI (US)
50AQI (US)
80AQI (US)
30AQI (US)
24AQI (US)
51AQI (US)
48AQI (US)
40AQI (US)
28AQI (US)
26AQI (US)
32AQI (US)
27AQI (US)
30AQI (US)
29AQI (US)
26AQI (US)
37AQI (US)
40AQI (US)
23AQI (US)
40AQI (US)
41AQI (US)
47AQI (US)
42AQI (US)
37AQI (US)
40AQI (US)
50AQI (US)
17AQI (US)
27AQI (US)
40AQI (US)
44AQI (US)
54AQI (US)
21AQI (US)
22AQI (US)
28AQI (US)
24AQI (US)
17AQI (US)
22AQI (US)
22AQI (US)
20AQI (US)
22AQI (US)
26AQI (US)
33AQI (US)
28AQI (US)
22AQI (US)
30AQI (US)
53AQI (US)
25AQI (US)
53AQI (US)
62AQI (US)
57AQI (US)
74AQI (US)
62AQI (US)
55AQI (US)
57AQI (US)
41AQI (US)
52AQI (US)
48AQI (US)
54AQI (US)
44AQI (US)
48AQI (US)
44AQI (US)
46AQI (US)
43AQI (US)
21AQI (US)
27AQI (US)
54AQI (US)
38AQI (US)
34AQI (US)
50AQI (US)
49AQI (US)
32AQI (US)
29AQI (US)
39AQI (US)
32AQI (US)
28AQI (US)
20AQI (US)
35AQI (US)
19AQI (US)
16AQI (US)
18AQI (US)
11AQI (US)
16AQI (US)
20AQI (US)
18AQI (US)
21AQI (US)
19AQI (US)
22AQI (US)
19AQI (US)
16AQI (US)
14AQI (US)
16AQI (US)
16AQI (US)
30AQI (US)
29AQI (US)
36AQI (US)
29AQI (US)
50AQI (US)
39AQI (US)
42AQI (US)
76AQI (US)
46AQI (US)
46AQI (US)
39AQI (US)
48AQI (US)
32AQI (US)
28AQI (US)
42AQI (US)
50AQI (US)
45AQI (US)
36AQI (US)
47AQI (US)
49AQI (US)
74AQI (US)
96AQI (US)
70AQI (US)
68AQI (US)
50AQI (US)
52AQI (US)
54AQI (US)
51AQI (US)
52AQI (US)
50AQI (US)
51AQI (US)
42AQI (US)
62AQI (US)
59AQI (US)
57AQI (US)
55AQI (US)
48AQI (US)
46AQI (US)
51AQI (US)
60AQI (US)
55AQI (US)
37AQI (US)
51AQI (US)
46AQI (US)
57AQI (US)
40AQI (US)
36AQI (US)
41AQI (US)
47AQI (US)
48AQI (US)
52AQI (US)
51AQI (US)
33AQI (US)
28AQI (US)
38AQI (US)
40AQI (US)
32AQI (US)
42AQI (US)
26AQI (US)
52AQI (US)
47AQI (US)
No. of days
202638AQI (US)
Highest AQI (US) recorded in
July52AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
October48AQI (US)
Lowest AQI (US) recorded in
March28AQI (US)
202434AQI (US)
Highest AQI (US) recorded in
September50AQI (US)
Lowest AQI (US) recorded in
November22AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
June58AQI (US)
Lowest AQI (US) recorded in
October26AQI (US)
202236AQI (US)
Highest AQI (US) recorded in
June45AQI (US)
Lowest AQI (US) recorded in
December32AQI (US)
202140AQI (US)
Highest AQI (US) recorded in
July72AQI (US)
Lowest AQI (US) recorded in
December29AQI (US)
202037AQI (US)
Highest AQI (US) recorded in
June45AQI (US)
Lowest AQI (US) recorded in
March32AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Watertown's annual 2026 AQI (US) (38) shows an average percentage change of 1.3% (worsened AQI (US)) compared to previous years: 2020 (37), 2021 (40), 2022 (36), 2023 (42), 2024 (34), 2025 (37).