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14 Days
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Monthly
Precipitation
Temperature
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°Celsius
°Fahrenheit
Monthly Historical Averages
Watertown, SD
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September
Average Temperature
High
22°
Feels 22
Low
10°
Feels 9
Average Precipitation
9 Days
Rain amount
58.1mm
Snow amount
0.1cm
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
23°
15
20°
16
18°
17
22°
18
22°
19
21°
20
19°
21
19°
22
23°
23
22°
24
21°
25
21°
26
21°
27
20°
28
20°
29
30
Forecast
Monday, September 14, 2026
Day
23°
Feels 23
Wind
37 km/h SE
Gust
56 km/h
Humidity
69%
P.O.P
90%
Rain
~10 mm
Night
10°
Feels 6
Wind
37 km/h W
Gust
56 km/h
Humidity
82%
P.O.P
60%
Rain
<1 mm
Historical Averages
Sep 14
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.