Annual mean 8°C · wettest around April · prevailing wind NW
Warmest
27.1 °C
Coldest
-2.6 °C
Wettest
74%
Windiest
5.8 m/s
Prevailing
NW
4.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Spearfish over the whole year is 8°C. July is the hottest month, with highs of about 27°C; February is the coldest, with lows of about -7°C. The rainy (wet) season in Spearfish runs from January to September, peaking in April with a 73% chance of rain on a given day. The dry season is October to December; December is the driest month, at 21%. Winds in Spearfish are highest in April, averaging 4.4 m/s (16 km/h), and lightest in August, at 3.2 m/s (12 km/h). The prevailing wind is from the NW. The clearest skies in Spearfish come in July, when the sky is typically 15% covered; February is the cloudiest month, at 43%.
Month by month Spearfish climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-1°C
-5°C
-6°C
70%
40%
4.0 m/s
0
0
4
February
-2°C
-7°C
-8°C
67%
43%
4.0 m/s
0
0
7
March
5°C
-2°C
-1°C
62%
41%
3.9 m/s
2
0
20
April
9°C
2°C
3°C
73%
41%
4.4 m/s
10
0
34
May
15°C
9°C
11°C
68%
38%
3.9 m/s
32
2
61
June
23°C
15°C
20°C
66%
22%
3.6 m/s
65
23
57
July
27°C
18°C
25°C
69%
15%
3.3 m/s
61
53
30
August
26°C
16°C
23°C
68%
16%
3.2 m/s
65
42
41
September
21°C
12°C
18°C
68%
23%
3.4 m/s
58
19
58
October
12°C
4°C
7°C
28%
30%
3.8 m/s
23
1
48
November
7°C
0°C
1°C
22%
32%
4.0 m/s
5
0
26
December
1°C
-4°C
-5°C
21%
34%
4.2 m/s
0
0
9
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Spearfish weather by season
Year round, Spearfish has days of about -2°C at their warmest in February, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -7°C to 18°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around April and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Spearfish weather in winterDecember to February
High -1°CLow -5°CRain 52%
Winter in Spearfish has typical daily highs of about -1°C and lows of about -5°C, with a 52% chance of rain on a given day.
Spearfish weather in springMarch to May
High 10°CLow 3°CRain 68%
Spring in Spearfish has typical daily highs of about 10°C and lows of about 3°C, with a 68% chance of rain on a given day.
Spearfish weather in summerJune to August
High 25°CLow 16°CRain 68%
Summer in Spearfish has typical daily highs of about 25°C and lows of about 16°C, with a 68% chance of rain on a given day.
Spearfish weather in autumnSeptember to November
High 13°CLow 5°CRain 39%
Autumn in Spearfish has typical daily highs of about 13°C and lows of about 5°C, with a 39% chance of rain on a given day.
When is the rainy season in Spearfish?
The rainy (wet) season in Spearfish runs from January to September, peaking in April with a 73% chance of rain on a given day. The dry season is October to December; December is the driest month, at 21%.
What time of year is Spearfish windiest?
Winds in Spearfish are highest in April, averaging 4.4 m/s (16 km/h), and lightest in August, at 3.2 m/s (12 km/h). The prevailing wind is from the NW.
What is the average temperature in Spearfish year round?
The average temperature in Spearfish over the whole year is 8°C. July is the hottest month, with highs of about 27°C; February is the coldest, with lows of about -7°C.