December weather forecast
Centennial, WY

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Weather in December

December, the first month of the winter in Centennial, is also a subzero cold month, with an average temperature fluctuating between 28.2°F (-2.1°C) and 14.2°F (-9.9°C).

Temperature

December tends to be the coldest month, with temperatures averaging a daily high of 28.2°F (-2.1°C) and a low of 14.2°F (-9.9°C).

Humidity

In December, the average relative humidity in Centennial is 75%.

Rainfall

In December, the rain falls for 6 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, in Centennial, there are 110.5 rainfall days, and 14.57" (370mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. In December, in Centennial, it is snowing for 11.8 days. Throughout December, 4.96" (126mm) of snow is accumulated. In Centennial, Wyoming, during the entire year, snow falls for 89 days and aggregates up to 49.8" (1265mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:11 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:45 pm MST.

Sunshine

December has the least sunshine of the year in Centennial, with an average of 6.4h of sunshine.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Centennial. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months in Centennial?

December is the month when Centennial sees the average lowest temperatures, with a high of 28.2°F (-2.1°C) and a low of 14.2°F (-9.9°C).

How cold is December in Centennial?

In December, the average high-temperature and low-temperature in Centennial are 28.2°F (-2.1°C) and 14.2°F (-9.9°C) respectively.

What is the average humidity in December in Centennial?

In Centennial, the average relative humidity in December is 75%.

How much does it rain in Centennial in December?

In Centennial, Wyoming, in December, it is raining for 6 days, with typically 0.75" (19mm) of accumulated precipitation.

How much does it snow in Centennial in December?

In Centennial, in December, snow falls for 11.8 days, with typically accumulated 4.96" (126mm) of snow.

What is the month with the shortest days in Centennial?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

How many hours of daylight does Centennial have in December?

The average day length in December is 9h and 15min.

When are sunrise and sunset in December in Centennial?

On the first day of December, sunrise is at 7:11 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:45 pm MST.

What is the month with the least sunshine in Centennial?

The month with the least sunshine in Centennial is December, with an average of 6.4h of sunshine.

How long on average sun shines in December in Centennial?

In Centennial, the average sunshine duration in December is 6.4h.

What are the months with the lowest UV index in Centennial?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Centennial.

What is the UV index reading in December in Centennial?

In Centennial, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Centennial, WY

Average temperature in December - Centennial, WY
  • Average high temperature in December: 28.2°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (28.2°F).

  • Average low temperature in December: 14.2°F

The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).

Average pressure in December
Centennial, WY

Average pressure in December - Centennial, WY
  • Average pressure in December: 30.15"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in December
Centennial, WY

Average wind speed in December - Centennial, WY
  • Average wind speed in December: 13.6mph

The windiest month (with the highest average wind speed) is January (14.1mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

Average humidity in December
Centennial, WY

Average humidity in December - Centennial, WY
  • Average humidity in December: 75%

The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is August (43%).

Average rainfall in December
Centennial, WY

Average rainfall in December - Centennial, WY
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in December
Centennial, WY

Average rainfall days in December - Centennial, WY
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (4 days).

Average snowfall in December
Centennial, WY

Average snowfall in December - Centennial, WY
  • Average snowfall in December: 4.96"

The month with the highest snowfall is April (9.84").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Centennial, WY

Average snowfall days in December - Centennial, WY
  • Average snowfall days in December: 11.8 days

The month with the highest number of snowfall days is April (13.7 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Centennial, WY
  • Average daylight in December: 9h and 2min

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

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in December
Centennial, WY

Average sunshine days in December - Centennial, WY
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is May (9 days).

Average UV index in December
Centennial, WY

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

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in December
Centennial, WY

Average cloud cover in December - Centennial, WY
  • Average cloud cover in December: 30

The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 16).

Average visibility in December
Centennial, WY

Average visibility in December - Centennial, 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).

Centennial, Wyoming, USA

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