December weather forecast
Littleton, CO

The hilly slopes on the South Platte River during the fall, large rocks, and stones in the river below
The hilly slopes on the South Platte River during the fall, large rocks, and stones in the river below

Weather in December

The first month of the winter, December, is still a cold month in Littleton, Colorado, with an average temperature ranging between max 41°F (5°C) and min 21°F (-6.1°C).

Temperature

The coldest month is December, with an average high-temperature of 41°F (5°C) and an average low-temperature of 21°F (-6.1°C).

Humidity

The average relative humidity in December is 60%.

Rainfall

In Littleton, it is raining for 4.4 days, with typically 0.51" (13mm) of accumulated precipitation. In Littleton, during the entire year, the rain falls for 101.2 days and collects up to 11.89" (302mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Littleton, Colorado. In Littleton, in December, during 7 snowfall days, 4.06" (103mm) of snow is typically accumulated. Throughout the year, there are 42.7 snowfall days, and 34.92" (887mm) of snow is accumulated.

Daylight

With an average of 9h and 25min of daylight, December has the shortest days of the year.
On the first day of December in Littleton, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:45 pm MST.

Sunshine

In Littleton, Colorado, the average sunshine in December is 7h.

UV index

The months with the lowest UV index in Littleton are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Littleton?

With an average high-temperature of 41°F (5°C) and an average low-temperature of 21°F (-6.1°C), December is the coldest month in Littleton, Colorado.

What is the temperature in December in Littleton?

In Littleton, in December, the average high-temperature is 41°F (5°C), and the average low-temperature is 21°F (-6.1°C). in August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 84.2°F (29°C).

What is the average humidity in December in Littleton?

The average relative humidity in December in Littleton, Colorado, is 60%.

How much does it rain in Littleton in December?

In Littleton, in December, it is raining for 4.4 days, with typically 0.51" (13mm) of accumulated precipitation.

How much does it snow in Littleton in December?

In Littleton, Colorado, during December, snow falls for 7 days and regularly aggregates up to 4.06" (103mm) of snow.

What is the month with the shortest days in Littleton?

December has the shortest days of the year, with an average of 9h and 25min of daylight.

How many hours of daylight does Littleton have in December?

In Littleton, Colorado, the average day length in December is 9h and 25min.

When is the sunrise / sunset in December in Littleton?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of the month, in Littleton, Colorado, sunrise is at 7:20 am and sunset at 4:45 pm MST.

How long on average sun shines in December in Littleton?

In December, the average sunshine duration in Littleton, Colorado, is 7h.

What is the month with the lowest UV index in Littleton?

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

How high is the UV index in December in Littleton?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents 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
Littleton, CO

Average temperature in December - Littleton, CO
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (41°F).

  • Average low temperature in December: 21°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (21°F).

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Average pressure in December
Littleton, CO

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

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

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Average wind speed in December
Littleton, CO

Average wind speed in December - Littleton, CO
  • Average wind speed in December: 6.1mph

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

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Average humidity in December
Littleton, CO

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

The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (41%).

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Average rainfall in December
Littleton, CO

Average rainfall in December - Littleton, CO
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in December
Littleton, CO

Average rainfall days in December - Littleton, CO
  • Average rainfall days in December: 4.4 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (3 days).

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Average snowfall in December
Littleton, CO

Average snowfall in December - Littleton, CO
  • Average snowfall in December: 4.06"

The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Littleton, CO

Average snowfall days in December - Littleton, CO
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Littleton, CO
  • Average daylight in December: 9h and 25min

The month with the longest days is June (Average daylight: 14h and 56min).
The month with the shortest days is December (Average daylight: 9h and 25min).

  • Average sunshine in December: 7h and 0min

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

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Average sunshine days in December
Littleton, CO

Average sunshine days in December - Littleton, CO
  • Average sunshine days in December: 22.3 days

The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is July (10 days).

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Average UV index in December
Littleton, CO

Average UV index in December - Littleton, 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).

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Average cloud cover in December
Littleton, CO

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

The month with the most cloud cover is April (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 14).

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Average visibility in December
Littleton, CO

Average visibility in December - Littleton, 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).

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