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7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sylvan Lake Resort, SD
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May
Average Temperature
High
13°
Feels 12
Low
3°
Feels -1
Average Precipitation
14 Days
Rain amount
83.7mm
Snow amount
14.7cm
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
14°
21
16°
22
8°
23
18°
24
23°
25
25°
26
24°
27
16°
28
17°
29
19°
30
19°
31
19°
Forecast
Wednesday, May 20, 2026
Day
14°
Feels 13
Wind
20 km/h S
Gust
30 km/h
Humidity
38%
P.O.P
40%
Rain
~1 mm
Night
4°
Feels 0
Wind
24 km/h SW
Gust
36 km/h
Humidity
93%
P.O.P
30%
Historical Averages
May 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.