December weather forecastWaukesha, WI
December
Weather in December
The city of Waukesha welcomes the full force of winter in December. As temperatures dip to their lowest, the town braces itself for the cold. With snowfall measuring to 0.79" (20mm) scattered over almost 9 days, the city witnesses a quintessential white December. The short daylight hours and the overcast sky contribute to the cold, wintry setting. The frequent winds of December, cold and sharp, bring forth the annual chill of Wisconsin's winters.Temperature
Waukesha in December demonstrates a small temperature transition, adjusting from an average high of a chilly 43.3°F (6.3°C) in November to a subzero cold 31.8°F (-0.1°C). In the month of December, the average temperature in Waukesha dips to a still freezing cold 22.3°F (-5.4°C) during the night.Humidity
The average relative humidity in December is 83%.Rainfall
February and December are months with the least rain in Waukesha when the rain falls for 6.6 days and typically aggregates up to 0.51" (13mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In Waukesha, in December, snow falls for 8.9 days, with typically accumulated 0.79" (20mm) of snow. In Waukesha, during the entire year, snow falls for 43.1 days and aggregates up to 5.35" (136mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Waukesha, Wisconsin.On the first day of December in Waukesha, sunrise is at 7:05 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:28 pm CST.
Sunshine
In Waukesha, Wisconsin, the average sunshine in December is 3.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Waukesha, Wisconsin. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 1 during December translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Stay sun-safe with clothing that is both closely woven and worn loosely. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waukesha, WI
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in December
Waukesha, WI
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Waukesha, WI
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and February (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Waukesha, WI
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in December
Waukesha, WI
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is July (1.73").
The driest months (with the least rainfall) are February and December (0.51").
Average rainfall days in December
Waukesha, WI
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in December
Waukesha, WI
- Average snowfall in December: 0.79"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Waukesha, WI
- Average snowfall days in December: 8.9 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waukesha, WI
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Waukesha, WI
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Waukesha, 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 and December (UV index 1).
Average cloud cover in December
Waukesha, WI
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Waukesha, WI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
