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

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

66°F

19°C

Humidity 88%
Wind Speed Calm
Barometer 29.83 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 17 Jun 4:35 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 86. Southwest wind 5 to 8 mph becoming west northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Partly Sunny
    then T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms. Low around 65. North wind 5 to 7 mph becoming east southeast after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 78. East wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 78 °F

    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. North wind 5 to 10 mph becoming west after midnight.

    Low: 60 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 86. West southwest wind 6 to 9 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 91. Breezy.

    High: 91 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Breezy.

    Low: 75 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny, with a high near 94. Breezy.

    High: 94 °F

    Sunny and
    Breezy

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 86. Southwest wind 5 to 8 mph becoming west northwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms. Low around 65. North wind 5 to 7 mph becoming east southeast after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 78. East wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Mostly clear, with a low around 60. North wind 5 to 10 mph becoming west after midnight.
Juneteenth
Sunny, with a high near 86. West southwest wind 6 to 9 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.
Friday
Sunny, with a high near 91. Breezy.
Friday Night
Mostly clear, with a low around 75. Breezy.
Saturday
Sunny, with a high near 94. Breezy.
Saturday Night
Clear, with a low around 75. Breezy.
Sunday
Sunny, with a high near 94. Windy.
Sunday Night
Mostly clear, with a low around 74. Breezy.
Monday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.73°N 92.75°W
Last Update:
3:06 am CDT Jun 17, 2025
Forecast Valid:
4am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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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