December weather forecast
Arapahoe, WY

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Weather in December

The first month of the winter, December, is still a freezing cold month in Arapahoe, Wyoming, with temperature in the range of an average high of 30.9°F (-0.6°C) and an average low of 14.7°F (-9.6°C).

Temperature

Arapahoe reaches its lowest average temperatures in December, measuring 30.9°F (-0.6°C) at the peak and 14.7°F (-9.6°C) at the lowest.

Humidity

In December, the average relative humidity in Arapahoe is 72%.

Rainfall

In Arapahoe, Wyoming, in December, during 3.1 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Arapahoe, during the entire year, the rain falls for 67.6 days and collects up to 6.81" (173mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Arapahoe, during December, snow falls for 6.7 days and regularly aggregates up to 2.24" (57mm) of snow. In Arapahoe, during the entire year, snow falls for 42.7 days and aggregates up to 24.92" (633mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:49 pm MST.

Sunshine

The average sunshine in December is 6.7h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

December is the month when Arapahoe sees the average lowest temperatures, with a high of 30.9°F (-0.6°C) and a low of 14.7°F (-9.6°C).

How cold is it in Arapahoe in December?

The high-temperature, in December, in Arapahoe, is 30.9°F (-0.6°C), while the low-temperature averages to 14.7°F (-9.6°C).

What is the average humidity in December?

The average relative humidity in December in Arapahoe is 72%.

How much does it rain in Arapahoe in December?

In Arapahoe, during December, the rain falls for 3.1 days and regularly aggregates up to 0.31" (8mm) of precipitation.

How many days does it snow in December?

In Arapahoe, in December, snow falls for 6.7 days, with typically accumulated 2.24" (57mm) of snow.

What is the month with the shortest days?

With an average of 9h and 6min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 4min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:26 am and sunset at 4:40 pm. On the last day of the month, in Arapahoe, sunrise is at 7:45 am and sunset at 4:49 pm MST.

How many hours of sunshine does Arapahoe have in December?

In Arapahoe, the average sunshine duration in December is 6.7h.

When is the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Arapahoe.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Arapahoe, WY

Average temperature in December - Arapahoe, WY
  • Average high temperature in December: 30.9°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (30.9°F).

  • Average low temperature in December: 14.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).

Average pressure in December
Arapahoe, WY

Average pressure in December - Arapahoe, WY
  • Average pressure in December: 30.2"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in December
Arapahoe, WY

Average wind speed in December - Arapahoe, WY
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).

Average humidity in December
Arapahoe, WY

Average humidity in December - Arapahoe, WY
  • Average humidity in December: 72%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are July and August (31%).

Average rainfall in December
Arapahoe, WY

Average rainfall in December - Arapahoe, WY
  • Average rainfall in December: 0.31"

The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is January (0.24").

Average rainfall days in December
Arapahoe, WY

Average rainfall days in December - Arapahoe, WY
  • Average rainfall days in December: 3.1 days

The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is January (2.5 days).

Average snowfall in December
Arapahoe, WY

Average snowfall in December - Arapahoe, WY
  • Average snowfall in December: 2.24"

The month with the highest snowfall is April (5.39").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Arapahoe, WY

Average snowfall days in December - Arapahoe, WY
  • Average snowfall days in December: 6.7 days

The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
Arapahoe, WY

Average daylight in December / Average sunshine in December - Arapahoe, WY
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 6h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).

Average sunshine days in December
Arapahoe, WY

Average sunshine days in December - Arapahoe, WY
  • Average sunshine days in December: 23.5 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (15.5 days).

Average UV index in December
Arapahoe, WY

Average UV index in December - Arapahoe, WY
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Arapahoe, WY

Average cloud cover in December - Arapahoe, WY
  • Average cloud cover in December: 26

The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).

Average visibility in December
Arapahoe, WY

Average visibility in December - Arapahoe, WY
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Arapahoe, Wyoming, USA

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