Autumn (September–November): Avg. 48–65°F, cool climate, decreasing rainfall. Common activities: Viewing autumn leaves (if the area has deciduous trees), hiking. Recommended clothing: Long-sleeved shirt, light jacket.
Winter (December–February): Avg. -2.7–-34.0°F, cold climate, possibility of snowfall or rainfall. Common activities: Skiing, snowshoeing (if sufficient snow). Recommended clothing: Heavy coat, hat, scarf, gloves.
Weather in Spearfish
Annual average temperature: approx. 47.7°F / Annual rainfall: approx. 647 mm / Summer humidity: 60%–70% / Rainiest month: May
Spearfish weather by month
Month
Temperature (°F)
Rainfall (mm)
January
27.1°F
25.2
February
29.3°F
30.3
March
32.2°F
29.6
April
41.9°F
96.1
May
54.3°F
133.2
June
64.2°F
89.4
July
72°F
38.5
August
71.1°F
69.7
September
65.1°F
44.5
October
48.7°F
35.3
November
35.4°F
14.7
December
30°F
41.4
7-day weather forecast for Spearfish
11/3
Tuesday
Sunny
52°F/33.5°F
11/4
Wednesday
Overcast
52.7°F/35.1°F
11/5
Thursday
Sunny
60.1°F/36.9°F
11/6
Friday
Overcast
55°F/38.4°F
11/7
Saturday
Sunny
58.8°F/39.5°F
11/8
Sunday
Sunny
60.7°F/39.6°F
11/9
Monday
Partly Cloudy
55.9°F/38.5°F
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