December weather forecast and climate
Blue River, CO

Weather in December

The first month of the winter, December, is also a subzero cold month in Blue River, Colorado, with average temperature varying between 21.2°F (-6°C) and 0.7°F (-17.4°C).

Temperature

The coldest month is December, with an average high-temperature of 21.2°F (-6°C) and an average low-temperature of 0.7°F (-17.4°C).

Humidity

In Blue River, the average relative humidity is 85%.

Rainfall

In Blue River, during 4.5 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, in Blue River, there are 110.4 rainfall days, and 24.09" (612mm) of precipitation is accumulated.

Snowfall

January through December are months with snowfall. In December, in Blue River, it is snowing for 17.6 days. Throughout December, 10.83" (275mm) of snow is accumulated. In Blue River, Colorado, during the entire year, snow falls for 158 days, and aggregates up to 118.82" (3018mm) of snow.

Daylight

With an average of 9.4h of daylight, December has the shortest days of the year in Blue River.

Sunshine

In December, the average sunshine in Blue River is 5.5h.

UV index

February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Blue River?

With an average high-temperature of 21.2°F (-6°C) and an average low-temperature of 0.7°F (-17.4°C), December is the coldest month in Blue River.

What is the temperature in December in Blue River?

In Blue River, Colorado, in December, the average high-temperature is 21.2°F (-6°C), and the average low-temperature is 0.7°F (-17.4°C).

What is the average humidity in December in Blue River?

The average relative humidity in December is 85%.

How many days does it rain in December in Blue River?

In Blue River, Colorado, during December, the rain falls for 4.5 days and regularly aggregates up to 1.34" (34mm) of precipitation.

How many days does it snow in December in Blue River?

In Blue River, Colorado, during December, snow falls for 17.6 days and regularly aggregates up to 10.83" (275mm) of snow.

What is the month with the shortest days in Blue River?

With an average of 9.4h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Blue River?

The average length of the day in December in Blue River, Colorado, is 9.4h.

How long on average sun shines in December in Blue River?

In Blue River, Colorado, the average sunshine in December is 5.5h.

What is the month with the lowest UV index in Blue River?

Months with the lowest UV index in Blue River are February and December, with an average maximum UV index of 1.

How high is the UV index in December in Blue River?

In Blue River, Colorado, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to the UV radiation.

Average temperature in December
Blue River, CO

Average temperature in December - Blue River, CO
  • Average high temperature in December: 21.2°F

The warmest month (with the highest average high temperature) is July (65.8°F).
The month with the lowest average high temperature is December (21.2°F).

  • Average low temperature in December: 0.7°F

The month with the highest average low temperature is July (40.1°F).
The coldest months (with the lowest average low temperature) are January and December (0.7°F).

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Average pressure in December
Blue River, CO

Average pressure in December - Blue River, CO
  • Average pressure in December: 30.16"

The month with the highest atmospheric pressure is January (30.19").
Months with the lowest atmospheric pressure are April and May (29.94").

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Average wind speed in December
Blue River, CO

Average wind speed in December - Blue River, CO
  • Average wind speed in December: 6.2mph

The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Blue River, CO

Average humidity in December - Blue River, CO
  • Average humidity in December: 85%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (54%).

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Average rainfall in December
Blue River, CO

Average rainfall in December - Blue River, CO
  • Average rainfall in December: 1.34"

The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is November (1.14").

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Average rainfall days in December
Blue River, CO

Average rainfall days in December - Blue River, CO
  • Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is November (2.8 days).

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Average snowfall in December
Blue River, CO

Average snowfall in December - Blue River, CO
  • Average snowfall in December: 10.83"

The month with the highest snowfall is May (19.69").
The month with the least snowfall is July (0.24").

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Average snowfall days in December
Blue River, CO

Average snowfall days in December - Blue River, CO
  • Average snowfall days in December: 17.6 days

The month with the highest number of snowfall days is April (22.8 days).
The month with the least snowfall days is July (1.3 days).

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Average daylight in December /
Average sunshine in December
Blue River, CO

Average daylight in December / Average sunshine in December - Blue River, CO
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is June (Average sunshine: 11.4h).
The month with the least sunshine is February (Average sunshine: 5.2h).

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Average sunshine days in December
Blue River, CO

Average sunshine days in December - Blue River, CO
  • Average sunshine days in December: 13.2 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (5.8 days).

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Average UV index in December
Blue River, CO

Average UV index in December - Blue River, CO
  • Average UV index in December: 1

Months with the highest UV index are May, June, July and August (UV index 3).
Months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in December
Blue River, CO

Average cloud cover in December - Blue River, CO
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 19).

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Average visibility in December
Blue River, CO

Average visibility in December - Blue River, CO
  • Average visibility in December: 4mi

Months with the highest visibility are June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March, April and December (4mi).

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