December weather forecastTheresa, WI
December
Weather in December
December, the first month of the winter in Theresa, is still a freezing cold month, with an average temperature ranging between max 29.3°F (-1.5°C) and min 19.2°F (-7.1°C).Temperature
A shift in the average high-temperature occurs in December, reducing from an icy 42.1°F (5.6°C) in November to a freezing cold 29.3°F (-1.5°C). In December, the average low-temperature is a still subzero cold 19.2°F (-7.1°C).Humidity
In Theresa, the average relative humidity in December is 85%.Rainfall
February and December are months with the least rain in Theresa when the rain falls for 4.2 days and typically aggregates up to 0.83" (21mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Theresa, in December, during 12.1 snowfall days, 2.2" (56mm) of snow is typically accumulated. In Theresa, Wisconsin, during the entire year, snow falls for 54.7 days and aggregates up to 13.82" (351mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:27 pm CST.
Sunshine
The average sunshine in December is 3.5h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. During bright days, sunglasses that offer UVA and UVB defense are recommended. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Theresa, WI
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in December: 19.2°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in December
Theresa, WI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Theresa, WI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in December
Theresa, WI
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Theresa, WI
- Average rainfall in December: 0.83"
The wettest months (with the highest rainfall) are May and June (2.6").
The driest months (with the least rainfall) are February and December (0.83").
Average rainfall days in December
Theresa, WI
- Average rainfall days in December: 4.2 days
The month with the highest number of rainy days is July (16.2 days).
The months with the least rainy days are January and February (3.1 days).
Average snowfall in December
Theresa, WI
- Average snowfall in December: 2.2"
The month with the highest snowfall is January (3.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Theresa, WI
- Average snowfall days in December: 12.1 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Theresa, WI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Theresa, WI
- Average sunshine days in December: 16 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in December
Theresa, WI
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Theresa, WI
- 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 36).
Average visibility in December
Theresa, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
