December weather forecast
Sheridan, CO

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Weather in December

The first month of the winter, December, is also an icy month in Sheridan, Colorado, with temperature in the range of an average high of 41.7°F (5.4°C) and an average low of 21.4°F (-5.9°C).

Temperature

December, known for its average high temperature of 41.7°F (5.4°C) and an average low temperature of 21.4°F (-5.9°C), is the coldest month.

Humidity

In Sheridan, the average relative humidity in December is 60%.

Rainfall

In Sheridan, in December, during 2 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, there are 80.2 rainfall days, and 9.72" (247mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 4.7 days. Throughout December, 2.24" (57mm) of snow is accumulated. Throughout the year, there are 33 snowfall days, and 26.26" (667mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:02 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:46 pm MST.

Sunshine

The average sunshine in December is 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 value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, an average UV index of 2 transforms into the following instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

December, marked by an average high-temperature of 41.7°F (5.4°C) and a low-temperature of 21.4°F (-5.9°C), is the coldest month.

How cold is it in Sheridan in December?

In Sheridan, 41.7°F (5.4°C) is the average high-temperature and 21.4°F (-5.9°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 84.2°F (29°C).

What is the average humidity in December in Sheridan?

In Sheridan, the average relative humidity in December is 60%.

How much does it rain in December?

In Sheridan, during December, the rain falls for 2 days and regularly aggregates up to 0.28" (7mm) of precipitation.

How many days does it snow in December?

In Sheridan, in December, snow falls for 4.7 days, with typically accumulated 2.24" (57mm) of snow.

What is the month with the shortest days?

With an average of 9h and 24min 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 in Sheridan is 9h and 25min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:02 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:46 pm MST.

How many hours of sunshine does Sheridan have in December?

The average sunshine duration in December is 7h.

When is the lowest UV index?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
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
Sheridan, CO

Average temperature in December - Sheridan, CO
  • Average high temperature in December: 41.7°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (41.7°F).

  • Average low temperature in December: 21.4°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).

Average pressure in December
Sheridan, CO

Average pressure in December - Sheridan, CO
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

Average wind speed in December
Sheridan, CO

Average wind speed in December - Sheridan, CO
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is December (6mph).

Average humidity in December
Sheridan, CO

Average humidity in December - Sheridan, CO
  • Average humidity in December: 60%

The month with the highest relative humidity is February (64%).
The months with the lowest relative humidity are June and August (41%).

Average rainfall in December
Sheridan, CO

Average rainfall in December - Sheridan, CO
  • Average rainfall in December: 0.28"

The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is January (0.24").

Average rainfall days in December
Sheridan, CO

Average rainfall days in December - Sheridan, CO
  • Average rainfall days in December: 2 days

The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is January (1.5 days).

Average snowfall in December
Sheridan, CO

Average snowfall in December - Sheridan, CO
  • Average snowfall in December: 2.24"

The month with the highest snowfall is April (4.96").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Sheridan, CO

Average snowfall days in December - Sheridan, CO
  • Average snowfall days in December: 4.7 days

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in December /
Average sunshine in December
Sheridan, CO

Average daylight in December / Average sunshine in December - Sheridan, CO
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 7h and 0min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).

Average sunshine days in December
Sheridan, CO

Average sunshine days in December - Sheridan, CO
  • Average sunshine days in December: 25.4 days

The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is May (14 days).

Average UV index in December
Sheridan, CO

Average UV index in December - Sheridan, CO
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Sheridan, CO

Average cloud cover in December - Sheridan, CO
  • Average cloud cover in December: 21

The month with the most cloud cover is April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

Average visibility in December
Sheridan, CO

Average visibility in December - Sheridan, CO
  • 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).

Sheridan, Colorado, USA

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