Weather in Spearfish: December
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Average day temperature: | 36.7°F |
| Average night temperature: | 28.2°F | |
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Number of sunny days: | 16 days |
| Day length: | 8.8 - 9.1 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.3 in. | |
| more information | ||
14 days
forecast
forecast
| Spearfish |
weather in
January
January
| Spearfish |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 68°F. At the same time the lowest night temperature was 5°F. Daily and nightly averages during December were 43.6°F and 34.1°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Spearfish in December is 0.3 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 9.3 mph It makes December one of the most windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 5.9.
Best time for vacation in Spearfish
Spearfish on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Spearfish
Local time: 04:08
September 19, saturday
0600
59°F
NW
8 mph
8 mph
0900
63°F
NW
5 mph
5 mph
1200
66°F
W
10 mph
10 mph
1500
66°F
W
14 mph
14 mph
1800
61°F
NW
15 mph
15 mph
2100
57°F
NW
13 mph
13 mph
September 20, sunday
0000
55°F
NW
11 mph
11 mph
0300
55°F
W
11 mph
11 mph
