December weather forecastSan Acacio, CO
December
Weather in December
December, the first month of the winter in San Acacio, is also an icy month, with temperature in the range of an average low of 11.8°F (-11.2°C) and an average high of 32.2°F (0.1°C).Temperature
With December's arrival, San Acacio's weather changes as the average high-temperature falls from a frosty 43.3°F (6.3°C) in November to an icy 32.2°F (0.1°C). In the month of December, the average temperature dips to an extreme cold 11.8°F (-11.2°C) during the night.Humidity
In San Acacio, the average relative humidity in December is 75%.Rainfall
In December, the rain falls for 3.3 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. Throughout the year, there are 72.2 rainfall days, and 8.82" (224mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In San Acacio, during December, snow falls for 9.7 days and regularly aggregates up to 4.06" (103mm) of snow. In San Acacio, during the entire year, snow falls for 57.6 days and aggregates up to 28.58" (726mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:55 pm MST.
Sunshine
In San Acacio, Colorado, the average sunshine in December is 6.6h.UV index
January through March, 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 vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during December leads to these instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. To protect against the Sun's most potent rays, avoid direct exposure around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Acacio, CO
- Average high temperature in December: 32.2°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 11.8°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in December
San Acacio, CO
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).
Average wind speed in December
San Acacio, CO
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are April and May (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in December
San Acacio, CO
- Average humidity in December: 75%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (38%).
Average rainfall in December
San Acacio, CO
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is November (0.43").
Average rainfall days in December
San Acacio, CO
- Average rainfall days in December: 3.3 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is November (1.3 days).
Average snowfall in December
San Acacio, CO
- Average snowfall in December: 4.06"
The month with the highest snowfall is March (5.55").
The months with the least snowfall are July and August (0").
Average snowfall days in December
San Acacio, CO
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
San Acacio, CO
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 6h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).
Average sunshine days in December
San Acacio, CO
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is October (24.1 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
San Acacio, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
San Acacio, CO
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 31).
The months with the least cloud cover are June and October (Cloud cover 14).
Average visibility in December
San Acacio, CO
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
