December weather forecastFort Atkinson, WI
December
Weather in December
Finally, in December, Fort Atkinson embraces winter wholeheartedly again. Snowfall, reaching 3.94" (100mm), replaces the rainfall entirely. The temperature drops significantly from November, with the lowest recorded at 20.7°F (-6.3°C). December brings the year full circle, returning the city to the freezing temperatures similar to January. The weather during December makes Fort Atkinson a winter wonderland, setting an apt weather scene to end the year.Temperature
Fort Atkinson's December weather comes with a decrease in average high-temperatures, moving from a chilly 43.7°F (6.5°C) in November to a subzero cold 31.1°F (-0.5°C). Throughout December, Fort Atkinson records an average temperature of 20.7°F (-6.3°C) at night.Humidity
The average relative humidity in December is 84%.Rainfall
In Fort Atkinson, during December, the rain falls for 6.9 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Fort Atkinson, during the entire year, the rain falls for 149.4 days and collects up to 28.82" (732mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Fort Atkinson, Wisconsin, in December, during 12.6 snowfall days, 3.94" (100mm) of snow is typically accumulated. In Fort Atkinson, during the entire year, snow falls for 58 days and aggregates up to 21.85" (555mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:31 pm CST.
Sunshine
In December, the average sunshine is 3.8h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 1 during December translates into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. 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
Average temperature in December
Fort Atkinson, WI
- Average high temperature in December: 31.1°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 (24.3°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Fort Atkinson, WI
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Fort Atkinson, WI
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Fort Atkinson, WI
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Fort Atkinson, WI
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (3.78").
The driest months (with the least rainfall) are January and February (1.42").
Average rainfall days in December
Fort Atkinson, WI
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (5 days).
Average snowfall in December
Fort Atkinson, WI
- Average snowfall in December: 3.94"
The month with the highest snowfall is February (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fort Atkinson, WI
- Average snowfall days in December: 12.6 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fort Atkinson, 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 48min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Fort Atkinson, WI
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is November (16.1 days).
The months with the least sunshine days are May and June (9.8 days).
Average UV index in December
Fort Atkinson, 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
Fort Atkinson, WI
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Fort Atkinson, 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).
