What is today's weather forecast for Sussex, WI?

Today's forecast for Sussex shows a high of 23 degrees and a low of -3 degrees Fahrenheit. A chance of flurries after 5pm.

What is the 7-day weather forecast for Sussex, WI?

The 7-day forecast for Sussex shows highs from 4 to 40 degrees and lows from -7 to 37 degrees Fahrenheit. Expect precipitation on 1 day with chances of 20% or higher.

Will it rain in Sussex, WI this week?

Yes, rain is possible in Sussex this week. Precipitation chances: Wednesday (40% chance).

How accurate is the Sussex weather forecast?

WeatherForYou provides highly accurate Sussex forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Sussex, WI Weather Forecast and Current Conditions

WEATHER ALERTS - Cold Weather Advisory

Current Conditions From Nearby Local Station

Switch to Metric Units

9°F
Feels Like 9°F

Humidity 93% Dew Point 7°F Wind Calm Barometer 29.92 in.

Solar Rad 9 w/m²

Report from a personal weather station 1.2 mi. NNW of central Sussex
at 7:29 AM Fri, Dec 12, 2025

Point Forecast at a Glance

FriDec 12

-3

SatDec 13

-7

SunDec 14

-1

MonDec 15

TueDec 16

WedDec 17

ThuDec 18

30%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures dip from 23°F to a low of 4°F mid-week, then warm to 40°F. Some precipitation possible, including both rain and snow.

Climate Context

This week's forecast shows temperatures running 13°F below the historical average for December. Normal highs for this period are around 34°F with lows around 19°F.

This Date in Weather History

1967 - From December 12th through the 20th a series of snowstorms buries Flagstaff, AZ with nearly 85 inches of snow.

Sussex, WI 7 Day Weather Forecast Details

Friday Dec 12

Day: A chance of flurries after 5pm. Partly sunny, with a high near 23. Light northwest wind becoming west 5 to 10 mph in the morning.

Night: A chance of flurries before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around -3. Wind chill values between -10 and -20. West wind 10 to 15 mph, with gusts as high as 25 mph.

Saturday Dec 13

Day: Cloudy, then gradually becoming mostly sunny and cold, with a high near 4. Wind chill values between -15 and -20. West wind around 15 mph.

Night: Mostly clear, with a low around -7. Wind chill values between -20 and -25. Northwest wind 10 to 15 mph.

Sunday Dec 14

Day: Sunny and cold, with a high near 8. Northwest wind 5 to 15 mph.

Night: Mostly cloudy, with a low around -1. Southwest wind 5 to 15 mph.

Monday Dec 15

Day: Partly sunny, with a high near 19. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Night: Mostly cloudy, with a low around 8. West wind around 5 mph becoming calm in the evening.

Tuesday Dec 16

Day: Mostly cloudy, with a high near 34.

Night: Mostly cloudy, with a low around 29.

Wednesday Dec 17

Day: Mostly cloudy, with a high near 40.

Night: A 40 percent chance of rain. Mostly cloudy, with a steady temperature around 37.

Thursday Dec 18

Day: A 30 percent chance of rain. Partly sunny, with a temperature falling to around 28 by 5pm.

About Sussex, WI

Sussex is a village in Waukesha County, Wisconsin, United States, about 19 miles (31 km) northwest of Milwaukee and 9 miles (14 km) north of Waukesha. The village is 7.24 square miles (19 km2) at an elevation of 930 feet. The population was 11,487 at the 2020 census. It is part of the Milwaukee metropolitan area.

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

How We Provide Better Local Weather

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.

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