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.

Partly Cloudy

39°F

4°C

Humidity 64%
Wind Speed SE 18 G 23 mph
Barometer 30.08 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 8 Apr 2:55 am CDT
Extended Forecast for

Grinnell IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. Breezy, with a south southeast wind around 18 mph, with gusts as high as 29 mph.

    Low: 35 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 70. Windy, with a south southwest wind 18 to 23 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 20%.

    High: 70 °F

    Windy.
    Decreasing
    Clouds then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 39. Southwest wind 6 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 39 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers after 1pm. Increasing clouds, with a high near 60. North wind around 6 mph becoming light and variable in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. North northeast wind 6 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 41 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 40%.

    High: 62 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. Breezy, with a south southeast wind around 18 mph, with gusts as high as 29 mph.
Wednesday
A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 70. Windy, with a south southwest wind 18 to 23 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 39. Southwest wind 6 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of showers after 1pm. Increasing clouds, with a high near 60. North wind around 6 mph becoming light and variable in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. North northeast wind 6 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 40.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 40%.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 54.
Sunday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 72. Windy. Chance of precipitation is 60%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 60. Windy. Chance of precipitation is 60%.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 76. Windy.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Breezy. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 59. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
2:01 am CDT Apr 8, 2026
Forecast Valid:
3am CDT Apr 8, 2026-6pm CDT Apr 14, 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