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

63°F

17°C

Humidity 85%
Wind Speed S 12 mph
Barometer 29.84 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 13 Apr 7:55 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: Mostly cloudy, with a high near 77. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 77 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 2am and 5am. Mostly cloudy, with a low around 62. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 26 mph.

    Low: 62 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South southwest wind 8 to 14 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Southwest wind 8 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 59 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 74. South wind 7 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 53. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of thunderstorms before 7am. Sunny, with a high near 75. Chance of precipitation is 10%.

    High: 75 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 79. Windy. Chance of precipitation is 60%.

    High: 79 °F

    Mostly Sunny
    and Breezy
    then Showers
    Likely and
    Windy

Detailed Forecast

Today
Mostly cloudy, with a high near 77. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 2am and 5am. Mostly cloudy, with a low around 62. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 26 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South southwest wind 8 to 14 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Southwest wind 8 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 74. South wind 7 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 53. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of thunderstorms before 7am. Sunny, with a high near 75. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 57.
Friday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 79. Windy. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 42. Breezy. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 54. Breezy.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
6:06 am CDT Apr 13, 2026
Forecast Valid:
8am CDT Apr 13, 2026-6pm CDT Apr 19, 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