December weather forecastDelta, CO
December
Weather in December
December, the first month of the winter in Delta, is also an icy month, with an average temperature varying between 18°F (-7.8°C) and 34.7°F (1.5°C).Temperature
Delta's December weather shows a moderate shift in high-temperatures, falling from November's chilly 46.2°F (7.9°C) to a wintry 34.7°F (1.5°C). The average temperature during December nights is registered at a freezing cold 18°F (-7.8°C).Humidity
In Delta, the average relative humidity in December is 74%.Rainfall
In Delta, during December, the rain falls for 8.5 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Delta, during the entire year, the rain falls for 120.8 days and collects up to 14.06" (357mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 10.4 days and accumulates 5.87" (149mm) of snow.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 7:12 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:30 am and sunset at 5:00 pm MST.
Sunshine
In Delta, the average sunshine in December is 6.5h.UV index
The months with the lowest UV index in Delta, Colorado, are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Delta, CO
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in December
Delta, CO
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is May (29.92"Hg).
Average wind speed in December
Delta, CO
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (7mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).
Average humidity in December
Delta, CO
- Average humidity in December: 74%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is June (34%).
Average rainfall in December
Delta, CO
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is June (0.71").
Average rainfall days in December
Delta, CO
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is April (13.8 days).
The month with the least rainy days is June (6.8 days).
Average snowfall in December
Delta, CO
- Average snowfall in December: 5.87"
The month with the highest snowfall is December (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Delta, CO
- Average snowfall days in December: 10.4 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Delta, 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 6min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in December
Delta, CO
- Average sunshine days in December: 16.2 days
The months with the most sunshine days are June and November (20.4 days).
The month with the least sunshine days is August (13.3 days).
Average UV index in December
Delta, 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, November and December (UV index 2).
Average cloud cover in December
Delta, CO
- Average cloud cover in December: 32
The months with the most cloud cover are January and February (Cloud cover 33).
The month with the least cloud cover is June (Cloud cover 11).
Average visibility in December
Delta, CO
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
