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 onset brings a reduction in the average high-temperature, from an icy 39.2°F (4°C) in November to a subzero cold 25.9°F (-3.4°C). During the month of December, Custer experiences a steady low-temperature average of 16.5°F (-8.6°C).Humidity
In Custer, Wisconsin, the average relative humidity in December is 88%.Rainfall
In Custer, in December, it is raining for 4.6 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 123.2 rainfall days, and 23.54" (598mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Custer. December is the month with the most snowfall in Custer. Snow falls for 12.9 days and accumulates 5.2" (132mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:14 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:28 pm CST.
Sunshine
In Custer, the average sunshine in December is 3.1h.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 reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
How cold is December in Custer?
What is the average humidity in December in Custer?
How much does it rain in Custer in December?
What is the snowiest month in Custer?
How many days does it snow in December in Custer?
What is the month with the shortest days in Custer?
How many hours of daylight does Custer have in December?
What time are sunrise and sunset in December in Custer?
How long on average sun shines in December in Custer?
What is the month with the lowest UV index in Custer?
What is the UV index reading in December in Custer?
Average temperature in December
Custer, WI
- Average high temperature in December: 25.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (20.5°F).
- Average low temperature in December: 16.5°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in December
Custer, WI
- Average pressure in December: 30.09"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
Custer, WI
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.2mph).
Average humidity in December
Custer, WI
- Average humidity in December: 88%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Custer, WI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in December
Custer, WI
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Custer, WI
- Average snowfall in December: 5.2"
The month with the highest snowfall is December (5.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Custer, WI
- Average snowfall days in December: 12.9 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Custer, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Custer, WI
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (17 days).
The months with the least sunshine days are April, May and June (12.7 days).
Average UV index in December
Custer, 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, February, November and December (UV index 1).
Average cloud cover in December
Custer, WI
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in December
Custer, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Custer, Wisconsin, USA
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