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Monthly
Precipitation
Temperature
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Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Mount Vernon, SD
Content continues below
May
Average Temperature
High
21°
Feels 21
Low
9°
Feels 7
Average Precipitation
12 Days
Rain amount
96.1mm
Snow amount
0.1cm
Content continues below
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
21
22
17°
23
21°
24
27°
25
30°
26
29°
27
29°
28
27°
29
26°
30
26°
31
26°
Forecast
Friday, May 22, 2026
Day
17°
Feels 16
Wind
28 km/h E
Gust
42 km/h
Humidity
55%
P.O.P
100%
Rain
~10 mm
Night
9°
Feels 6
Wind
28 km/h W
Gust
42 km/h
Humidity
94%
P.O.P
20%
Historical Averages
May 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.