Annual mean 8°C · wettest around May · prevailing wind W
Warmest
29.6 °C
Coldest
-1.6 °C
Wettest
16%
Windiest
8.4 m/s
Prevailing
W
6.4 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 Casper over the whole year is 8°C. July is the hottest month, with highs of about 29°C; February is the coldest, with lows of about -7°C. Casper has no sharply defined rainy season: the chance of rain on a given day runs from 8% in January, the driest month, to 18% in May, the wettest. Winds in Casper are highest in February, averaging 6.3 m/s (23 km/h), and lightest in July, at 3.8 m/s (14 km/h). The prevailing wind is from the W. The clearest skies in Casper come in July, when the sky is typically 12% covered; April is the cloudiest month, at 40%.
Month by month Casper 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
-6°C
-10°C
8%
32%
6.2 m/s
0
0
1
February
-1°C
-7°C
-9°C
10%
35%
6.3 m/s
0
0
2
March
6°C
-3°C
-2°C
14%
36%
5.4 m/s
1
0
13
April
10°C
0°C
3°C
15%
40%
5.1 m/s
7
0
35
May
16°C
6°C
11°C
18%
39%
4.5 m/s
34
1
64
June
24°C
13°C
19°C
13%
19%
4.3 m/s
74
21
65
July
29°C
16°C
25°C
11%
12%
3.8 m/s
68
61
31
August
27°C
13°C
23°C
12%
14%
3.8 m/s
78
45
46
September
23°C
9°C
17°C
12%
19%
4.2 m/s
64
13
68
October
13°C
3°C
6°C
12%
27%
4.7 m/s
17
0
49
November
6°C
-1°C
-2°C
11%
28%
5.6 m/s
1
0
14
December
1°C
-5°C
-8°C
9%
28%
6.3 m/s
0
0
2
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 Casper weather by season
Year round, Casper has days of about -1°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -7°C to 16°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around May and least likely around January. 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.
Casper weather in winterDecember to February
High -0°CLow -6°CRain 9%
Winter in Casper has typical daily highs of about -0°C and lows of about -6°C, with a 9% chance of rain on a given day.
Casper weather in springMarch to May
High 11°CLow 1°CRain 15%
Spring in Casper has typical daily highs of about 11°C and lows of about 1°C, with a 15% chance of rain on a given day.
Casper weather in summerJune to August
High 27°CLow 14°CRain 12%
Summer in Casper has typical daily highs of about 27°C and lows of about 14°C, with a 12% chance of rain on a given day.
Casper weather in autumnSeptember to November
High 14°CLow 3°CRain 12%
Autumn in Casper has typical daily highs of about 14°C and lows of about 3°C, with a 12% chance of rain on a given day.
When is the rainy season in Casper?
Casper has no sharply defined rainy season: the chance of rain on a given day runs from 8% in January, the driest month, to 18% in May, the wettest.
What time of year is Casper windiest?
Winds in Casper are highest in February, averaging 6.3 m/s (23 km/h), and lightest in July, at 3.8 m/s (14 km/h). The prevailing wind is from the W.
What is the average temperature in Casper year round?
The average temperature in Casper over the whole year is 8°C. July is the hottest month, with highs of about 29°C; February is the coldest, with lows of about -7°C.