December weather forecastSillsville, CO
December
Weather in December
December, the first month of the winter in Sillsville, is also a subzero cold month, with an average temperature ranging between max 26.8°F (-2.9°C) and min 3.7°F (-15.7°C).Temperature
December's arrival correlates with a reduction in the average high-temperature, down from an icy 38.3°F (3.5°C) in November to a subzero cold 26.8°F (-2.9°C). Despite the significant gap from daytime peaks, Sillsville experiences an average low-temperature of 3.7°F (-15.7°C) in December.Humidity
In Sillsville, Colorado, the average relative humidity in December is 83%.Rainfall
In Sillsville, during December, the rain falls for 9.6 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 88.8 rainfall days, and 9.61" (244mm) of precipitation is accumulated.Snowfall
January through June, October through December are months with snowfall. In Sillsville, in December, during 13.9 snowfall days, 8.54" (217mm) of snow is typically accumulated. Throughout the year, there are 91.9 snowfall days, and 51.77" (1315mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:56 pm MST.
Sunshine
In December, the average sunshine is 6.5h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sillsville, CO
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 3.7°F
The month with the highest average low temperature is July (44.6°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).
Average pressure in December
Sillsville, CO
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).
Average wind speed in December
Sillsville, CO
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are May and June (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).
Average humidity in December
Sillsville, CO
- Average humidity in December: 83%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (44%).
Average rainfall in December
Sillsville, CO
- Average rainfall in December: 1.06"
The wettest months (with the highest rainfall) are February and March (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in December
Sillsville, CO
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is October (4.1 days).
Average snowfall in December
Sillsville, CO
- Average snowfall in December: 8.54"
The month with the highest snowfall is February (9.37").
The months with the least snowfall are July, August and September (0").
Average snowfall days in December
Sillsville, CO
- Average snowfall days in December: 13.9 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Sillsville, CO
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 6h and 30min
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 24min).
Average sunshine days in December
Sillsville, CO
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is June (23.1 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Sillsville, CO
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Sillsville, CO
- Average cloud cover in December: 31
The month with the most cloud cover is February (Cloud cover 35).
The months with the least cloud cover are June and September (Cloud cover 12).
Average visibility in December
Sillsville, CO
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
