Monthly Historical AveragesCastlewood, SD
Average Temperature
High
20°
Feels 19
Low
8°
Feels 5
Average Precipitation
11 Days
96.1mm
0.1cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, May 23, 2026
Day
22°Feels 22
Wind
21 km/h W
Gust
32 km/h
Humidity
41%
P.O.P
40%
Night
10°Feels 8
Wind
13 km/h SE
Gust
20 km/h
Humidity
82%
P.O.P
10%
Historical AveragesMay 23
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity