Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With December's arrival, Mellen sees a decrease in average high-temperatures, moving from a cold 36.5°F (2.5°C) in November to a subzero cold 24.4°F (-4.2°C). Mellen consistently logs a low temperature averaging 16.3°F (-8.7°C) during December, a modest drop from daytime temperatures.Humidity
The average relative humidity in December is 89%.Rainfall
In Mellen, in December, during 4.2 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 120.3 rainfall days, and 21.65" (550mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 23.6 days and accumulates 10.04" (255mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:26 pm CST.
Sunshine
In December, the average sunshine is 2.4h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December in Mellen?
How many days does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Mellen have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Mellen, WI
- Average high temperature in December: 24.4°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (19°F).
- Average low temperature in December: 16.3°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (8.6°F).
Average pressure in December
Mellen, WI
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Mellen, WI
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is November (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in December
Mellen, WI
- Average humidity in December: 89%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).
Average rainfall in December
Mellen, WI
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days in December
Mellen, WI
- Average rainfall days in December: 4.2 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in December
Mellen, WI
- Average snowfall in December: 10.04"
The month with the highest snowfall is December (10.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mellen, WI
- Average snowfall days in December: 23.6 days
The month with the highest number of snowfall days is January (24.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mellen, WI
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 6min).
Average sunshine days in December
Mellen, WI
- Average sunshine days in December: 7.1 days
The month with the most sunshine days is September (14.3 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in December
Mellen, WI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Mellen, WI
- Average cloud cover in December: 76
The month with the most cloud cover is January (Cloud cover 80).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Mellen, WI
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).
Mellen, Wisconsin, USA
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