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Fire Weather Concerns West; Thunderstorms in the Upper Midwest

Dry and breezy conditions will enhance fire weather concerns across portions of the northern and central High Plains through Saturday, where fuels remain largely receptive. Severe thunderstorms are possible across portions of central Nebraska to the Upper Midwest this Friday afternoon into tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

60°F

16°C

Humidity 86%
Wind Speed SE 5 mph
Barometer 30.00 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 11 Sep 5:55 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: Sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 4am and 5am, then a slight chance of thunderstorms after 5am. Partly cloudy, with a low around 63. South southeast wind around 8 mph. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers between 11am and noon. Mostly sunny, with a high near 80. South southwest wind 6 to 9 mph becoming north in the afternoon.

    High: 80 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. North wind 3 to 5 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 73. East northeast wind 5 to 8 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 84. Breezy. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 61. Breezy. Chance of precipitation is 80%.

    Low: 61 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 81. South wind 5 to 10 mph.
Tonight
A slight chance of showers and thunderstorms between 4am and 5am, then a slight chance of thunderstorms after 5am. Partly cloudy, with a low around 63. South southeast wind around 8 mph. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers between 11am and noon. Mostly sunny, with a high near 80. South southwest wind 6 to 9 mph becoming north in the afternoon.
Saturday Night
Partly cloudy, with a low around 56. North wind 3 to 5 mph.
Sunday
Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 73. East northeast wind 5 to 8 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 84. Breezy. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm. Low around 61. Breezy. Chance of precipitation is 80%.
Tuesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Tuesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Wednesday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
5:36 am CDT Sep 11, 2026
Forecast Valid:
6am CDT Sep 11, 2026-6pm CDT Sep 17, 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