December weather forecastSouthglenn, CO
December
Weather in December
The first month of the winter, December, is also a wintry month in Southglenn, Colorado, with an average temperature fluctuating between 41°F (5°C) and 21°F (-6.1°C).Temperature
In Southglenn, Colorado, the lowest temperatures are generally noted in December, averaging a high of 41°F (5°C) and a low of 21°F (-6.1°C).Humidity
The average relative humidity in December is 60%.Rainfall
The months with the least rainfall in Southglenn are January and December Rain falls for 2.5 days and accumulates 0.08" (2mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Southglenn, Colorado, during December, snow falls for 3 days and regularly aggregates up to 0.67" (17mm) of snow. In Southglenn, during the entire year, snow falls for 21 days and aggregates up to 7.91" (201mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Southglenn.On the first day of the month, sunrise is at 7:01 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:46 pm MST.
Sunshine
The average sunshine in December is 7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Southglenn. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. 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
Southglenn, CO
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (41°F).
- Average low temperature in December: 21°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (21°F).
Average pressure in December
Southglenn, CO
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in December
Southglenn, CO
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest months (with the lowest average wind speed) are August, September and December (6.2mph).
Average humidity in December
Southglenn, CO
- Average humidity in December: 60%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (41%).
Average rainfall in December
Southglenn, CO
- Average rainfall in December: 0.08"
The wettest month (with the highest rainfall) is July (0.51").
The driest months (with the least rainfall) are January and December (0.08").
Average rainfall days in December
Southglenn, CO
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is July (8.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in December
Southglenn, CO
- Average snowfall in December: 0.67"
The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Southglenn, CO
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Southglenn, CO
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
Average sunshine days in December
Southglenn, CO
- Average sunshine days in December: 28.3 days
The month with the most sunshine days is December (28.3 days).
The month with the least sunshine days is July (19.7 days).
Average UV index in December
Southglenn, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Southglenn, CO
- Average cloud cover in December: 21
The month with the most cloud cover is April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in December
Southglenn, 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).
