December weather forecast
Boone, CO

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Weather in December

December, the first month of the winter in Boone, is still a chilly month, with an average temperature varying between 24.4°F (-4.2°C) and 43°F (6.1°C).

Temperature

December stands out as Boone's coldest month, with temperatures ranging between an average high of 43°F (6.1°C) and a low of 24.4°F (-4.2°C).

Humidity

In Boone, the average relative humidity in December is 57%.

Rainfall

The month with the least rainfall in Boone is December, when the rain falls for 3.5 days and typically collects 0.28" (7mm) of precipitation.

Snowfall

Months with snowfall in Boone are January through May, October through December. In Boone, in December, snow falls for 4.5 days, with typically accumulated 1.73" (44mm) of snow. Throughout the year, there are 26.6 snowfall days, and 14.06" (357mm) of snow is accumulated.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year in Boone.
On the first day of December in Boone, Colorado, sunrise is at 6:55 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:47 pm MST.

Sunshine

The average sunshine in December in Boone is 6.9h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the coldest month in Boone?

In Boone, December is the month with the lowest recorded average temperatures, measuring a high of 43°F (6.1°C) and a low of 24.4°F (-4.2°C).

How cold is it in Boone in December?

In December, in Boone, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 24.4°F (-4.2°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 87.8°F (31°C).

What is the average humidity in December in Boone?

In December, the average relative humidity in Boone, Colorado, is 57%.

What is the driest month in Boone?

December is the month with the least rainfall in Boone. Rain falls for 3.5 days and accumulates 0.28" (7mm) of precipitation.

How many days does it rain in December in Boone?

In Boone, in December, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

How much does it snow in Boone in December?

In Boone, in December, snow falls for 4.5 days, with typically accumulated 1.73" (44mm) of snow.

What is the month with the shortest days in Boone?

With an average of 9h and 36min of daylight, December has the shortest days of the year in Boone, Colorado.

How many hours of daylight does Boone have in December?

In Boone, Colorado, the average day length in December is 9h and 34min.

When are sunrise and sunset in December in Boone?

In December, on the first day of the month, sunrise is at 6:55 am and sunset at 4:37 pm. On the last day of the month, in Boone, Colorado, sunrise is at 7:13 am and sunset at 4:47 pm MST.

How many hours of sunshine does Boone have in December?

In December, the average sunshine duration in Boone, Colorado, is 6.9h.

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

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

How high is the UV index in December in Boone?

In December, the average daily maximum UV index in Boone, Colorado, is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's 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
Boone, CO

Average temperature in December - Boone, CO
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in December: 24.4°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).

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Average pressure in December
Boone, CO

Average pressure in December - Boone, CO
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is April (29.88"Hg).

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Average wind speed in December
Boone, CO

Average wind speed in December - Boone, CO
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (7.1mph).

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Average humidity in December
Boone, CO

Average humidity in December - Boone, CO
  • Average humidity in December: 57%

The month with the highest relative humidity is February (59%).
The month with the lowest relative humidity is June (36%).

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Average rainfall in December
Boone, CO

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

The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is December (0.28").

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Average rainfall days in December
Boone, CO

Average rainfall days in December - Boone, CO
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is November (2.3 days).

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Average snowfall in December
Boone, CO

Average snowfall in December - Boone, CO
  • Average snowfall in December: 1.73"

The month with the highest snowfall is February (3.23").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Boone, CO

Average snowfall days in December - Boone, CO
  • Average snowfall days in December: 4.5 days

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

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

Average daylight in December / Average sunshine in December - Boone, CO
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in December
Boone, CO

Average sunshine days in December - Boone, CO
  • Average sunshine days in December: 25.1 days

The month with the most sunshine days is December (25.1 days).
The month with the least sunshine days is July (12.3 days).

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Average UV index in December
Boone, CO

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

The month with the highest UV index is June (UV index 7).
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
Boone, CO

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

The month with the most cloud cover is February (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 14).

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Average visibility in December
Boone, CO

Average visibility in December - Boone, 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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Boone, Colorado, USA

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