Casper weather by month

Check out Casper weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Casper (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	34	39	46	57	66	79	88	84	73	61	46	36
Min temperature (night-time)	12	16	21	30	37	46	54	50	41	32	23	14
Heat & Humidity	0	0	0	0	0	L	M	M	0	0	0	0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Casper

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	6	7	8	9	9	11	11	10	9	7	6	5
Daily hours of daylight	9	11	12	13	15	15	15	14	12	11	10	9
UV Index (Maximum)	2	2	4	6	8	9	10	9	7	4	2	1

Rainfall in Casper

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	8	8	9	10	11	9	9	6	7	7	7	8
Average monthly rainfall (inches)	0.5	0.6	0.9	1.6	2.2	1.6	1.3	0.7	0.9	0.9	0.7	0.6

More about Casper

Casper by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Wyoming (Casper) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Casper?

Casper has a cold semi arid climate with hot summers.

Casper weather in January

Expect daytime maximum temperatures of 34°F in Casper, Wyoming in January based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

34
34°F max day temperature
6
6 hours of sunshine per day
8
8 days with some rainfall
12
12°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.5
0.5 inches of monthly rainfall
2
2 (Low) UV index

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Casper weather in February

Expect daytime maximum temperatures of 39°F in Casper, Wyoming in February based on long-term weather averages. There are 7 hours of sunshine per day on average, which might fall as snow.

39
39°F max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
16
16°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
0.6
0.6 inches of monthly rainfall
2
2 (Low) UV index

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Casper weather in March

Expect daytime maximum temperatures of 46°F in Casper, Wyoming in March based on long-term weather averages. There are 8 hours of sunshine per day on average, which might fall as snow.

46
46°F max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
21
21°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
4
4 (Moderate) UV index

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Casper weather in April

Expect daytime maximum temperatures of 57°F in Casper, Wyoming in April based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 1.6 inches of rainfall in the month.

57
57°F max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
30
30°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
1.6
1.6 inches of monthly rainfall
6
6 (High) UV index

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Casper weather in May

Expect daytime maximum temperatures of 66°F in Casper, Wyoming in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 2.2 inches of rainfall in the month.

66
66°F max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
37
37°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
2.2
2.2 inches of monthly rainfall
8
8 (Very High) UV index

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Casper weather in June

Expect daytime maximum temperatures of 79°F in Casper, Wyoming in June based on long-term weather averages. There are 11 hours of sunshine per day on average with typically 1.6 inches of rainfall in the month.

79
79°F max day temperature
11
11 hours of sunshine per day
9
9 days with some rainfall
46
46°F min night temperature
15
15 hours of daylight per day
L
Low heat & humidity
1.6
1.6 inches of monthly rainfall
9
9 (Very High) UV index

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Casper weather in July

Expect daytime maximum temperatures of 88°F in Casper, Wyoming in July based on long-term weather averages. There are 11 hours of sunshine per day on average.

88
88°F max day temperature
11
11 hours of sunshine per day
9
9 days with some rainfall
54
54°F min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
1.3
1.3 inches of monthly rainfall
10
10 (Very High) UV index

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Casper weather in August

Expect daytime maximum temperatures of 84°F in Casper, Wyoming in August based on long-term weather averages. There are 10 hours of sunshine per day on average.

84
84°F max day temperature
10
10 hours of sunshine per day
6
6 days with some rainfall
50
50°F min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
0.7
0.7 inches of monthly rainfall
9
9 (Very High) UV index

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Casper weather in September

Expect daytime maximum temperatures of 73°F in Casper, Wyoming in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

73
73°F max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
41
41°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
7
7 (High) UV index

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Casper weather in October

Expect daytime maximum temperatures of 61°F in Casper, Wyoming in October based on long-term weather averages. There are 7 hours of sunshine per day on average.

61
61°F max day temperature
7
7 hours of sunshine per day
7
7 days with some rainfall
32
32°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
4
4 (Moderate) UV index

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Casper weather in November

Expect daytime maximum temperatures of 46°F in Casper, Wyoming in November based on long-term weather averages. There are 6 hours of sunshine per day on average.

46
46°F max day temperature
6
6 hours of sunshine per day
7
7 days with some rainfall
23
23°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
2
2 (Low) UV index

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Casper weather in December

Expect daytime maximum temperatures of 36°F in Casper, Wyoming in December based on long-term weather averages. There are 5 hours of sunshine per day on average, which might fall as snow.