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Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Spearfish, SD
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May
Average Temperature
High
18°
Feels 17
Low
6°
Feels 4
Average Precipitation
14 Days
Rain amount
151.2mm
Snow amount
8.3cm
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
7°
6
12°
7
14°
8
18°
9
15°
10
16°
11
25°
12
21°
13
19°
14
19°
15
22°
16
20°
17
20°
18
21°
19
21°
20
21
22
23
24
25
26
27
28
29
30
31
Forecast
Tuesday, May 5, 2026
Day
7°
Feels 3
Wind
27 km/h NW
Gust
41 km/h
Humidity
33%
P.O.P
30%
Night
-4°
Feels -7
Wind
22 km/h N
Gust
33 km/h
Humidity
68%
P.O.P
20%
Historical Averages
May 5
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.