December weather forecastCrystal, MN
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Crystal, Minnesota, with temperature in the range of an average high of 25°F (-3.9°C) and an average low of 15.1°F (-9.4°C).Temperature
December's arrival is marked by a significant decrease in the average high-temperature, moving from a wintry 40.1°F (4.5°C) in November to a subzero cold 25°F (-3.9°C). During December, the temperature in Crystal is averaged to a low of 15.1°F (-9.4°C) at night.Humidity
The average relative humidity in December is 87%.Rainfall
In Crystal, in December, during 4.5 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Crystal, during the entire year, the rain falls for 120.1 days and collects up to 22.09" (561mm) of precipitation.Snowfall
Months with snowfall in Crystal are January through May, October through December. December is the month with the most snowfall. Snow falls for 11.6 days and accumulates 5.04" (128mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:51 am and sunset at 4:41 pm CST.
Sunshine
In Crystal, the average sunshine in December is 3.4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 1 in December translates into these instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Crystal, MN
- Average high temperature in December: 25°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (20.1°F).
- Average low temperature in December: 15.1°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (7.5°F).
Average pressure in December
Crystal, MN
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Crystal, MN
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Crystal, MN
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Crystal, MN
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Crystal, MN
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in December
Crystal, MN
- Average snowfall in December: 5.04"
The month with the highest snowfall is December (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Crystal, MN
- Average snowfall days in December: 11.6 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Crystal, MN
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 3h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Crystal, MN
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is January (18.4 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
Crystal, MN
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Crystal, MN
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Crystal, MN
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
