Casper, WY weather and climate in 2025
Day
3 °C
Night
-9 °C
Sea
0 °C
Precipitation
18 mm
in month
Rainy days
8 days
in month
Daylight
9 hours
average
Sunshine
5 hours
average
Humidity
64 %
Day
3 °C
Night
-9 °C
Sea
0 °C
Precipitation
18 mm
in month
Rainy days
8 days
in month
Daylight
9 hours
average
Sunshine
5 hours
average
Humidity
64 %
Overview: Casper, WY
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Weather overview for Casper, WY
Weather overview
Casper, WY (United States of America) is a place with a mild continental climate. Temperatures during the day are in the range from 3 °C (37 °F) in December to 31 °C (89 °F) in July. The least rainy month in Casper, WY is August with its 7 days of rain, the rainiest month is May, when it rains 12 days. Temperatures during the night go from -9 °C (17 °F) in December to 12 °C (54 °F) in July.
January weather
The beginning of the descent of the number of rainy days could be noticed, with its value being 7 days in Casper, WY, while the rainfall amount is on its minimum, its value is 14 mm (0.56 in). The day temperature rise's start could be observed, its value is 4 °C (39 °F). The number of sun hours (without clouds) starts to rise, with its value being 6 hours.
February weather
The day temperature rises similarly to the previous month, its value is 4 °C (40 °F) in Casper, WY. The rise of the number of sun hours (without clouds) can be observed. The number of rainy days rise's start could be observed in February. The humidity reaches its maximum in February.
March weather
The rise of the number of rainy days can be observed, with its value of 10 days in Casper, WY, while the rainfall amount rise's start could be observed in March. The day temperature continues to rise, the value of this measure is 9 °C (49 °F), while the night temperature starts to rise in this month. The number of sun hours (without clouds) rises similarly to the previous month, its value is 8 hours.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.April weather
The day temperature rises similarly to the previous month, with its value being 14 °C (57 °F) in Casper, WY, and the rise of the night temperature can be observed as well, its value is -1 °C (30 °F). The rise of the number of rainy days can be observed, its value is 11 days, and the rise of the rainfall amount can be observed too, with its value of 39 mm (1.55 in). The wind speed reaches its maximum. The number of sun hours (without clouds) continues to rise, with its value being 9 hours.
May weather
The day temperature rises similarly to the previous month, the value of this measure is 20 °C (68 °F) in Casper, WY, and the night temperature rises similarly to the previous month too, the value of this measure is 4 °C (39 °F). The maximum of the number of rainy days can be noticed, the value of this measure is 12 days, and the rainfall amount is on its maximum too in May. The rise of the number of sun hours (without clouds) can be observed, with its value of 9 hours.
June weather
The rise of the day temperature can be observed, with its value of 26 °C (79 °F) in Casper, WY, and the night temperature continues to rise as well, with its value being 8 °C (46 °F). The tourist season is at its beginning this month. The beginning of the descent of the rainfall amount could be noticed, its value is 40 mm (1.57 in), and the number of rainy days descent's start could be observed as well, the value of this measure is 9 days. The maximum of the day length can be noticed, with its value of 15 hours.
July weather
The maximum of the day temperature is observable, the value of this measure is 31 °C (89 °F) in Casper, WY, and the maximum of the night temperature is observable too, with its value being 12 °C (54 °F). The number of rainy days continues to descent, and the descent of the rainfall amount can be observed too, with its value of 32 mm (1.25 in). The tourist season continues this month. The maximum of the number of sun hours (without clouds) can be noticed, with its value of 11 hours.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.August weather
The tourist season is close to its peak in Casper, WY. The day temperature starts to descent, with its value being 30 °C (87 °F), and the night temperature starts to descent as well in August. The number of rainy days reaches its minimum, while the rainfall amount continues to descent, the value of this measure is 19 mm (0.74 in). The beginning of the descent of the number of sun hours (without clouds) could be noticed, with its value being 10 hours.
September weather
The day temperature descents similarly to the previous month, the value of this measure is 25 °C (76 °F) in Casper, WY, and the descent of the night temperature can be observed too, the value of this measure is 6 °C (44 °F). The tourist season continues. The number of rainy days rise's start could be observed, and the beginning of the rise of the rainfall amount could be noticed too, its value is 27 mm (1.04 in). The number of sun hours (without clouds) descents similarly to the previous month, its value is 9 hours.
October weather
The night temperature descents similarly to the previous month in Casper, WY, and the day temperature continues to descent as well, with its value being 16 °C (61 °F). The number of sun hours (without clouds) continues to descent, with its value being 7 hours.
November weather
The descent of the day temperature can be observed, with its value being 8 °C (47 °F) in Casper, WY, and the night temperature descents similarly to the previous month too, its value is -5 °C (24 °F). The rainfall amount descent's start could be observed. The number of sun hours (without clouds) descents similarly to the previous month, with its value of 5 hours.
December weather
The minimum of the day temperature can be noticed, with its value of 3 °C (37 °F) in Casper, WY, and the night temperature reaches its minimum as well. The number of rainy days rise's start could be observed, with its value of 8 days. The number of sun hours (without clouds) is on its minimum, its value is 5 hours. The minimum of the day length can be noticed in this month.
FAQs
How windy is Casper, WY in April?
In April in Casper, WY, there will be an average wind scale of 5.
How many sunny hours can I expect in Casper, WY in May?
There is an average length of sunshine of 9 hours per day in May in Casper, WY.
What is the temperature in Casper, WY during the day in June?
In Casper, WY in June, the average daily temperatures will be 26 °C (79 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
Are there good conditions to visit in Casper, WY in July?
In July in Casper, WY, there are ideal conditions for a vacation. The temperature during the day will be nice 31 °C (89 °F). There are only 9 days of rain in the whole month, so you can leave your umbrella at home. The temperature of 12 °C (54 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.Is it hot in August in Casper, WY?
In August in Casper, WY, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
Is there a wet season in September in Casper, WY?
No, there is no wet season in September in Casper, WY - you can expect 7 days of rain during the month.
How many days of precipitation on average can I expect in Casper, WY in October?
There are 8 days, which are rainy in Casper, WY in October, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.8 days of the week, or in general - 25 % days.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.