Jefferson County, WI Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Clear 9°F
Feels Like 9°F  
Humidity 79% Dew Point 4°F Wind Calm Barometer 30.59 in.
Report from a personal weather station 7 mi. NW of central Jefferson County
at

Point Forecast at a Glance

SunDec 7
Sun Dec 7: Increasing Clouds, Low 0F
 
0
MonDec 8
Mon Dec 8: Mostly Cloudy, High 24F, Low 16F
24
16
TueDec 9
Tue Dec 9: Snow, High 34F, Low 30F
20%
34
30
WedDec 10
Wed Dec 10: Rain And Snow, High 25F, Low 6F
40%
25
6
ThuDec 11
Thu Dec 11: Snow, High 20F, Low 3F
20%
20
3
FriDec 12
Fri Dec 12: Snow, High 15F, Low -3F
20%
15
-3
SatDec 13
Sat Dec 13: Partly Sunny, High 7F, Low -5F
7
-5

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7-Day Temperature Trend

Week Ahead Summary

High temperatures start near 24°F, reaching 34°F before cooling to 7°F, then recovering to 7°F by week's end. Unsettled weather expected with wintry mix likely on at least 6 days.

Climate Context

This week's forecast shows temperatures running 14°F below the historical average for December. Normal highs for this period are around 33°F with lows around 17°F.

This Date in Weather History

1740 - In early December two weeks of mild and rainy weather culminated in the worst flood in fifty years in the Lower Connecticut River Valley. The Merrimack River swelled to its highest level, and in Maine the raging waters swept away mills, carried off bridges, and ruined highways.

More on this and other weather history

Jefferson County, WI 7 Day Weather Forecast Details

Sunday Dec 7

Increasing Clouds

Night: Increasing clouds, with a low around 0. North wind around 5 mph becoming calm in the evening.

Monday Dec 8

Mostly Cloudy

Day: Mostly cloudy, with a high near 24. Light and variable wind becoming south 5 to 10 mph in the morning.

Snow

Night: A 50 percent chance of snow, mainly after 9pm. Cloudy, with a temperature falling to near 16 by 9pm, then rising to around 25 during the remainder of the night. South wind 10 to 15 mph.

Tuesday Dec 9

Snow

Day: A slight chance of snow after noon, mixing with rain after 3pm. Cloudy, with a high near 34. West wind around 10 mph. Chance of precipitation is 20%.

Rain And Snow

Night: Rain and snow. Low around 30. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Wednesday Dec 10

Rain And Snow

Day: A chance of rain and snow before noon. Mostly cloudy, with a temperature falling to around 25 by 5pm. Northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

Mostly Cloudy

Night: Mostly cloudy, with a low around 6. Northwest wind 5 to 10 mph.

Thursday Dec 11

Snow

Day: A 20 percent chance of snow after noon. Partly sunny, with a high near 20. Northwest wind around 5 mph.

Snow

Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 3.

Friday Dec 12

Snow

Day: A 20 percent chance of snow. Mostly cloudy, with a high near 15.

Snow

Night: A 20 percent chance of snow. Mostly cloudy, with a low around -3.

Saturday Dec 13

Partly Sunny

Day: Partly sunny and cold, with a high near 7.

Snow

Night: A 20 percent chance of snow. Mostly cloudy, with a low around -5.

Sunday Dec 14

Partly Sunny

Day: Partly sunny, with a high near 12.


About Jefferson County, WI

Jefferson County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 84,900. Its county seat is Jefferson. Jefferson County comprises the Watertown-Fort Atkinson, WI Micropolitan Statistical Area, which is also included in the Milwaukee-Racine-Waukesha, WI Combined Statistical Area.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.