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Monthly
Forecasts
Current
Hourly
7 Days
14 Days
Monthly
°C
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Watertown, SD
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Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
-7°
2
-8°
3
-3°
4
3°
5
5°
6
2°
7
3°
8
5°
9
2°
10
-6°
11
-6°
12
-6°
13
-7°
14
-6°
15
-8°
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Forecast
Thursday, January 1, 2026
Day
-7°
Feels -11
Wind
10 km/h S
Gust
15 km/h
Humidity
62%
P.O.P
20%
Night
-16°
Feels -22
Wind
10 km/h N
Gust
15 km/h
Humidity
100%
P.O.P
20%
Historical Averages
Jan 1
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
January
Average Temperature
High
-6°
Feels -11
Low
-16°
Feels -23
Average Precipitation
4 Days
Rain amount
0mm
Snow amount
19.5cm