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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Marshall, Southwest Minnesota Regional Airport - Marshall/Ryan Field (KMML)

Lat: 44.45°NLon: 95.82°WElev: 1181ft.

Fair

54°F

12°C

Humidity 93%
Wind Speed Calm
Barometer 30.11 in (1019.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 28 Aug 2:56 am CDT
Extended Forecast for

Walnut Grove MN

  • Overnight

    Overnight: Mostly clear, with a low around 54. Calm wind becoming south around 5 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 83. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 65. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Partly Cloudy
    then Showers

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 8am. Cloudy through mid morning, then becoming mostly sunny, with a high near 86. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South southeast wind around 5 mph.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 88. South southeast wind 5 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. South southeast wind 5 to 10 mph becoming southwest after midnight.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. West southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 84 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. West northwest wind around 5 mph.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 54. Calm wind becoming south around 5 mph.
Friday
Mostly sunny, with a high near 83. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 65. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and thunderstorms likely, mainly before 8am. Cloudy through mid morning, then becoming mostly sunny, with a high near 86. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 88. South southeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 68. South southeast wind 5 to 10 mph becoming southwest after midnight.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. West southwest wind 5 to 10 mph becoming northwest in the afternoon.
Monday Night
Partly cloudy, with a low around 62. West northwest wind around 5 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. South southwest wind around 5 mph becoming west in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. West wind around 5 mph becoming east southeast after midnight.
Wednesday
Mostly sunny, with a high near 85. Southeast wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South wind around 5 mph.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. South wind 5 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Walnut Grove MN
 44.23°N 95.48°W (Elev. 1201 ft)
Last Update:
1:26 am CDT Aug 28, 2026
Forecast Valid:
3am CDT Aug 28, 2026-6pm CDT Sep 3, 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