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Monthly
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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Allen, SD
Content continues below
May
Average Temperature
High
18°
Feels 18
Low
6°
Feels 3
Average Precipitation
13 Days
Rain amount
99mm
Snow amount
5cm
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
18°
23
25°
24
30°
25
32°
26
29°
27
26°
28
22°
29
22°
30
23°
31
24°
Forecast
Friday, May 22, 2026
Day
18°
Feels 18
Wind
38 km/h W
Gust
57 km/h
Humidity
37%
P.O.P
40%
Rain
~1 mm
Night
3°
Feels 0
Wind
27 km/h SW
Gust
41 km/h
Humidity
87%
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.