National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Current conditions at

Madison, Madison-Lac Qui Parle County Airport (KDXX)

Lat: 44.98°NLon: 96.18°WElev: 1077ft.

Mostly Cloudy

65°F

18°C

Humidity 100%
Wind Speed Calm
Barometer 30.27 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 17 Sep 7:35 pm CDT
Extended Forecast for

Nassau MN

  • Tonight

    Tonight: Showers likely, mainly after 5am. The rain could be heavy at times. Mostly cloudy, with a low around 56. East wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Mostly Cloudy
    then Heavy
    Rain

  • Friday

    Friday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 63. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 63 °F

    Heavy Rain

  • Friday Night

    Friday Night: Showers, mainly before midnight. Low around 54. East northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Showers then
    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers between 7am and 1pm. Cloudy, with a high near 65. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 65 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52. North northeast wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 67. East wind 5 to 10 mph.

    High: 67 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 51. East northeast wind around 5 mph.

    Low: 51 °F

    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. East wind 5 to 10 mph.

    High: 61 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 47. East wind around 5 mph.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly after 5am. The rain could be heavy at times. Mostly cloudy, with a low around 56. East wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 63. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday Night
Showers, mainly before midnight. Low around 54. East northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A slight chance of showers between 7am and 1pm. Cloudy, with a high near 65. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 52. North northeast wind around 5 mph.
Sunday
Mostly cloudy, with a high near 67. East wind 5 to 10 mph.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 51. East northeast wind around 5 mph.
Monday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. East wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 47. East wind around 5 mph.
Tuesday
Partly sunny, with a high near 64. Southeast wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 49. South southeast wind around 5 mph.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 68. South southeast wind around 10 mph.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53. South southeast wind 5 to 10 mph.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 72. South southeast wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nassau MN
 45.06°N 96.42°W (Elev. 1129 ft)
Last Update:
5:47 pm CDT Sep 17, 2026
Forecast Valid:
7pm CDT Sep 17, 2026-6pm CDT Sep 24, 2026
 
Forecast Discussion
 
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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