Significant Coastal Impacts to the Mid-Atlantic and Northeast; Tropical Storm Nolo to Impact Hawaii

A strong coastal storm will bring moderate to major coastal flooding, strong winds, heavy rainfall and high surf to the Mid-Atlantic and New England. Tropical Storm Nolo is expected to strengthen into a hurricane Thursday as it moves north toward the Big Island of Hawaii. Heavy rainfall will continue through Saturday, with locally catastrophic flooding possible. Hurricane Watch in effect. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Madison, Dane County Regional-Truax Field (KMSN)

Lat: 43.14°NLon: 89.35°WElev: 860ft.

Mostly Cloudy

55°F

13°C

Humidity	87%
Wind Speed	E 8 mph
Barometer	30.40 in (1029.5 mb)
Dewpoint	51°F (11°C)
Visibility	10.00 mi
Wind Chill	53°F (12°C)
Last update	23 Sep 10:53 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Sun Prairie WI

Tonight
Low: 49 °F
Partly Cloudy
Thursday
High: 67 °F
Partly Sunny
Thursday Night
Low: 55 °F
Mostly Cloudy
then Slight
Chance
Showers
Friday
High: 67 °F
Decreasing
Clouds
Friday Night
Low: 48 °F
Partly Cloudy
Saturday
High: 68 °F
Partly Sunny
Saturday Night
Low: 50 °F
Mostly Cloudy
Sunday
High: 67 °F
Partly Sunny
Sunday Night
Low: 49 °F
Partly Cloudy

Detailed Forecast

Tonight

Partly cloudy, with a low around 49. Northeast wind around 5 mph.

Thursday

Partly sunny, with a high near 67. Calm wind becoming east around 5 mph in the morning.

Thursday Night

A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm in the evening.

Friday

Cloudy, then gradually becoming mostly sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 48. East wind around 5 mph becoming calm.

Saturday

Partly sunny, with a high near 68. Light east wind becoming southeast 5 to 10 mph in the morning.

Saturday Night

Mostly cloudy, with a low around 50. Southeast wind around 5 mph becoming calm.

Sunday

Partly sunny, with a high near 67. Calm wind becoming south around 5 mph.

Sunday Night

Partly cloudy, with a low around 49.

Monday

Mostly sunny, with a high near 69.

Monday Night

Partly cloudy, with a low around 53.

Tuesday

A 50 percent chance of showers. Partly sunny, with a high near 70.

Tuesday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.

Wednesday

A 50 percent chance of showers. Mostly cloudy, with a high near 66.

Additional Forecasts and Information

Zone Area Forecast for Dane County, WI

Climate Graphs For Milwaukee & Madison

Basemap Options

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ABOUT THIS FORECAST

Point Forecast:

Sun Prairie WI
43.17°N 89.24°W (Elev. 965 ft)

11:01 pm CDT Sep 23, 2026

Forecast Valid:

11pm CDT Sep 23, 2026-6pm CDT Sep 30, 2026

Forecast Discussion

Additional Resources

Radar & Satellite Image

Link to Local Radar Data

Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation