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
December's arrival correlates with a reduction in the average high-temperature, down from a cold 41.2°F (5.1°C) in November to a subzero cold 27.5°F (-2.5°C). Mather's average low-temperature in December is measured at 17.4°F (-8.1°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Mather, in December, during 5.4 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Mather, during the entire year, the rain falls for 136.8 days and collects up to 27.36" (695mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 14.2 days. Throughout December, 5.59" (142mm) of snow is accumulated. Throughout the year, there are 67.4 snowfall days, and 25.35" (644mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:17 am and sunset at 4:23 pm. On the last day of December, in Mather, sunrise is at 7:36 am and sunset at 4:32 pm CST.
Sunshine
In Mather, the average sunshine in December is 3.5h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December in Mather?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Mather, WI
- Average high temperature in December: 27.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (21.7°F).
- Average low temperature in December: 17.4°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 (9°F).
Average pressure in December
Mather, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Mather, WI
- Average wind speed in December: 9mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Mather, WI
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Mather, WI
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is June (4.06").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Mather, WI
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Mather, WI
- Average snowfall in December: 5.59"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mather, WI
- Average snowfall days in December: 14.2 days
The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mather, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Mather, WI
- Average sunshine days in December: 14.1 days
The months with the most sunshine days are September and November (16.4 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in December
Mather, WI
- Average UV index in December: 1
The month with the highest UV index is 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
Mather, WI
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Mather, WI
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mather, Wisconsin, USA
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