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

December weather forecast and climate
Cheyenne, WY

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 an excellent 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.

What is the coldest month in Cheyenne?

The coldest month in Cheyenne, Wyoming, is December, with an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 17.2°F (-8.2°C).

What is the temperature in December in Cheyenne?

The average high-temperature, in December, in Cheyenne, is 38.1°F (3.4°C), while the average low-temperature is 17.2°F (-8.2°C).

What is the average humidity in December in Cheyenne?

The average relative humidity in December is 54%.

How much does it rain in Cheyenne in December?

In December, in Cheyenne, Wyoming, the rain falls for 6.2 days. Throughout December, 0.5" (12.4mm) of precipitation is accumulated.

How many days does it snow in December in Cheyenne?

In Cheyenne, in December, snow falls for 6.8 days, with typically accumulated 8.4" (213.4mm) of snow.

What is the month with the shortest days in Cheyenne?

The month with the shortest days in Cheyenne is December, with an average of 9.3h of daylight.

What is the average length of the day in December in Cheyenne?

The average length of the day in December is 9.3h.

What is the month with the least sunshine in Cheyenne?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Cheyenne.

How many hours of sunshine does Cheyenne have in December?

In December, the average sunshine is 5.7h.

When is the lowest UV index in Cheyenne?

With an average maximum UV index of 1, December is the month with the lowest UV index.

What is the UV index intensity in December in Cheyenne?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Cheyenne, WY
  • 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).

  • 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).

Average humidity in December - Cheyenne, WY
  • 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%).

Average rainfall in December - Cheyenne, WY
  • 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").

Average rainfall days in December - Cheyenne, WY
  • 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).

Average snowfall in December - Cheyenne, WY
  • 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").

Average snowfall days in December - Cheyenne, WY
  • 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).

Average daylight in December / Average sunshine in December - Cheyenne, WY
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • 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).

Average UV index in December - Cheyenne, WY
  • 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).