Cheyenne
Wyoming, USA
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Cheyenne, WY

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A sunny day in the front of the State Capitol building in Cheyenne, Wyoming
A sunny day in the front of the State Capitol building in Cheyenne, Wyoming
December in Cheyenne is quite dry and extremely cold with the temperature in the cold range between 17.6°F (-8°C) and 42.8°F (6°C).
Most days receive seven hours of sunshine that help most tourists to bask and wade off the cold.
Considering that the winter is at its peak in December, expect the snowfall for approximately seven and a half days with a mildly high accumulation of 8.5" (215.9mm).
The Chinooks, dominant during winter, return to make December feel warmer than registered. December is a mildly dry month and only has six rainfall days with light showers that collect at 0.5" (12.7mm) precipitation.
With the winter in place, crowds die off and provide a good opportunity to enjoy the cold side of Cheyenne without congestion. The main activities for fans of winter weather are skating and skiing, while the rest retreat indoors due to freezing weather.
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  • The average high temperature in December: 38.2°F

The warmest month (with the highest average high temperature) is July (83.4°F).
The month with the lowest average high temperature is December (38.2°F).

  • The average low temperature in December: 17.3°F

The month with the highest average low temperature is July (55.5°F).
The coldest month (with the lowest average low temperature) is December (17.3°F).

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  • The average humidity in December: 54%

The month with the highest relative humidity is March (56.1%).
The month with the lowest relative humidity is October (50%).

  • The average rainfall in December: 0.5"

Wettest months (with the highest rainfall) are May and June (2.3").
The driest month (with the lowest rainfall) is January (0.3").

  • The average rainfall days in December: 6.2 days

The month with the highest number of rainy days is May (12.4 days).
The month with the lowest number of rainy days is January (4.9 days).

  • The average snowfall in December: 8.4"

The month with the highest snowfall is March (11.3").
Months with the lowest snowfall are June, July and August (0").

  • The average snowfall days in December: 6.8 days

The month with the highest number of snowfall days is March (7.8 days).
Months with the lowest number of snowfall days are July and August (0 days).

  • The average daylight in December: 9h

Months with the longest days are May, June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in December: 5.7h

The month with most sunshine is July (Average sunshine: 10.2h).
The month with least sunshine is December (Average sunshine: 5.7h).

  • The average UV index in December: 1

Months with the highest UV index are June and July (UV index 10).
The month with the lowest UV index is December (UV index 1).

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