Monthly Historical AveragesSylvan Lake Resort, SD
Average Temperature
High
13°
Feels 12
Low
3°
Feels -1
Average Precipitation
14 Days
83.7mm
14.7cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastWednesday, May 20, 2026
Day
15°Feels 14
Wind
23 km/h S
Gust
35 km/h
Humidity
38%
P.O.P
40%
Rain
~1 mm
Night
4°Feels 1
Wind
24 km/h S
Gust
36 km/h
Humidity
81%
P.O.P
20%
Historical AveragesMay 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity