December weather forecastBoone, CO
December
Weather in December
The first month of the winter, December, is still a chilly month in Boone, Colorado, with temperature in the range of an average high of 43°F (6.1°C) and an average low of 24.4°F (-4.2°C).Temperature
December is the month that records the lowest temperatures, with averages ranging from a high of 43°F (6.1°C) to a low of 24.4°F (-4.2°C).Humidity
In Boone, the average relative humidity in December is 57%.Rainfall
December is the month with the least rainfall. Rain falls for 3.5 days and accumulates 0.28" (7mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Boone, Colorado, in December, snow falls for 4.5 days, with typically accumulated 1.73" (44mm) of snow. In Boone, during the entire year, snow falls for 26.6 days and aggregates up to 14.06" (357mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:55 am and sunset at 4:37 pm. On the last day of December, in Boone, sunrise is at 7:13 am and sunset at 4:47 pm MST.
Sunshine
The average sunshine in December 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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The Sun's radiation is especially intense around midday; try to stay in shade during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in December /
Average sunshine in December
Boone, CO
- Average daylight in December: 9h and 36min
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 54min
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).
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).
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).
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).
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).
