Casper
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Casper, WY

The calm North Platte River flowing through downtown Casper in Wyoming, with a dramatic dark and cloudy sky and a yellow sunset part of the sky
The calm North Platte River flowing through downtown Casper in Wyoming, with a dramatic dark and cloudy sky and a yellow sunset part of the sky
January, the same as December, is a wintry winter month in Casper, Wyoming, with temperature in the range of an average high of 35.2°F (1.8°C) and an average low of 14.4°F (-9.8°C). In January, the average high-temperature is almost the same as in December - a still wintry 35.2°F (1.8°C). Weather in January »
February, the last month of the winter, in Casper, is another cold month, with average temperature fluctuating between 37.8°F (3.2°C) and 15.6°F (-9.1°C). In Casper, the average high-temperature is relatively the same as in January - a still wintry 37.8°F (3.2°C). Weather in February »

The first month of the spring, March, is a frosty month in Casper, Wyoming, with average temperature fluctuating between 47.8°F (8.8°C) and 22.5°F (-5.3°C). In Casper, the average high-temperature rises, from a cold 37.8°F (3.2°C) in February, to a chilly 47.8°F (8.8°C). Weather in March »

April in Casper, Wyoming, is a mild spring month, with average temperature fluctuating between 56.8°F (13.8°C) and 28.6°F (-1.9°C). In April, the average high-temperature increases, from a frosty 47.8°F (8.8°C) in March, to a mild 56.8°F (13.8°C). Weather in April »

May, the last month of the spring, in Casper, is a comfortable month, with average temperature ranging between min 37.2°F (2.9°C) and max 67.1°F (19.5°C). In Casper, the average high-temperature rises, from a mild 56.8°F (13.8°C) in April, to an enjoyable 67.1°F (19.5°C). Weather in May »

June, the first month of the summer, in Casper, is a warm month, with average temperature varying between 45.7°F (7.6°C) and 78.8°F (26°C). In Casper, Wyoming, the average high-temperature rises, from a comfortable 67.1°F (19.5°C) in May, to a moderately hot 78.8°F (26°C). Weather in June »

July in Casper, Wyoming, is a hot summer month, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 88.2°F (31.2°C). July is the warmest month, with an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 53.1°F (11.7°C). Weather in July »

The last month of the summer, August, is also a hot month in Casper, Wyoming, with average temperature varying between 51.4°F (10.8°C) and 86.4°F (30.2°C). In Casper, the average high-temperature in August is practically the same as in July - a still hot 86.4°F (30.2°C). Weather in August »

The first month of the autumn, September, is still a warm month in Casper, Wyoming, with average temperature fluctuating between 41.4°F (5.2°C) and 74.3°F (23.5°C). In Casper, the average high-temperature decreases, from a hot 86.4°F (30.2°C) in August, to a moderately hot 74.3°F (23.5°C). Weather in September »

October, the same as September, in Casper, Wyoming, is another mild autumn month, with average temperature fluctuating between 59.4°F (15.2°C) and 30.9°F (-0.6°C). In Casper, the average high-temperature in October plummets, from a warm 74.3°F (23.5°C) in September, to a mild 59.4°F (15.2°C). Weather in October »

The last month of the autumn, November, is another chilly month in Casper, Wyoming, with average temperature fluctuating between 44.8°F (7.1°C) and 21.6°F (-5.8°C). In Casper, the average high-temperature declines considerably, from a moderate 59.4°F (15.2°C) in October, to a frosty 44.8°F (7.1°C). Weather in November »

December, the first month of the winter, in Casper, is also a wintry month, with average temperature varying between 34.2°F (1.2°C) and 13.5°F (-10.3°C). The coldest month is December, with an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 13.5°F (-10.3°C). Weather in December »

How much does it rain in Casper?

In Casper, Wyoming, during the entire year, the rain falls for 94.8 days and collects up to 12.6" (319.5mm) of precipitation.

What is the driest month in Casper?

The month with the least rainfall in Casper is January when the rain falls for 6.1 days and typically collects 0.5" (12.4mm) of precipitation.

When does it snow in Casper?

Months with snowfall are January through June, September through December.

How much does it snow in Casper?

In Casper, Wyoming, during the entire year, snow falls for 48.6 days, and aggregates up to 75.8" (1925.3mm) of snow.

What is the snowiest month in Casper?

The month with the most snowfall is April when snow falls for 6.4 days and typically aggregates up to 11.5" (292.1mm) of snow.

What is the wettest month in Casper?

The month with the most rainfall is May when the rain falls for 11.2 days and typically aggregates up to 2" (51.1mm) of precipitation.

When are the longest days in Casper?

With an average of 15.3h of daylight, June has the longest days of the year.

What is the month with the most sunshine in Casper?

June and July, with an average of 11h of sunshine, are months with the most sunshine.

What is the warmest month in Casper?

With an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 53.1°F (11.7°C), July is the warmest month in Casper.

When is the highest UV index in Casper?

July is the month with the highest UV index, with an average maximum UV index of 10.

What is the coldest month in Casper?

With an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 13.5°F (-10.3°C), December is the coldest month in Casper.

What is the month with the shortest days in Casper?

With an average of 9.1h of daylight, December has the shortest days of the year in Casper.

What is the month with the least sunshine in Casper?

The month with the least sunshine in Casper, Wyoming, is December, with an average of 5h of sunshine.

What is the month with the lowest UV index in Casper?

December is the month with the lowest UV index in Casper, Wyoming, with an average maximum UV index of 1.
Average temperature - Casper, WY
Average rainfall - Casper, WY
Average rainfall days - Casper, WY

The month with the highest number of rainy days is May (11.2 days).
The month with the lowest number of rainy days is January (6.1 days).

Average snowfall days - Casper, WY

The month with the highest number of snowfall days is March (7.7 days).
Months with the lowest number of snowfall days are July and August (0 days).

Average daylight / Average sunshine - Casper, WY