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

66°F

19°C

Humidity 62%
Wind Speed S 14 mph
Barometer 29.71 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 31 Mar 3:55 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: A 20 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Partly sunny, with a steady temperature around 64. Windy, with a south southwest wind 15 to 22 mph becoming north in the afternoon. Winds could gust as high as 30 mph.

    High: 64 °F

    Slight Chance
    T-storms and
    Windy

  • Tonight

    Tonight: A chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 38. Breezy, with a northeast wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A chance of rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 46. Breezy, with an east wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 46 °F

    Breezy.
    Chance
    Showers then
    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 36. Breezy, with an east northeast wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 36 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Rain before 1pm, then rain likely and possibly a thunderstorm between 1pm and 4pm, then rain likely after 4pm. High near 57. Breezy, with an east wind 14 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 57 °F

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Friday

    Friday: A 50 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm before 1am, then rain likely. Low around 40. Breezy. Chance of precipitation is 80%.

    Low: 40 °F

    Rain and
    Breezy

  • Saturday

    Saturday: A 50 percent chance of rain. Mostly cloudy, with a high near 51. Windy.

    High: 51 °F

    Chance Rain
    and Windy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Partly sunny, with a steady temperature around 64. Windy, with a south southwest wind 15 to 22 mph becoming north in the afternoon. Winds could gust as high as 30 mph.
Tonight
A chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 38. Breezy, with a northeast wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 46. Breezy, with an east wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain and possibly a thunderstorm. Low around 36. Breezy, with an east northeast wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday
Rain before 1pm, then rain likely and possibly a thunderstorm between 1pm and 4pm, then rain likely after 4pm. High near 57. Breezy, with an east wind 14 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Partly cloudy, with a low around 36.
Friday
A 50 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 64.
Friday Night
Rain and possibly a thunderstorm before 1am, then rain likely. Low around 40. Breezy. Chance of precipitation is 80%.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 51. Windy.
Saturday Night
Mostly cloudy, with a low around 30. Windy.
Sunday
Mostly sunny, with a high near 49. Breezy.
Sunday Night
Mostly clear, with a low around 29.
Monday
Mostly sunny, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
3:11 am CDT Mar 31, 2026
Forecast Valid:
4am CDT Mar 31, 2026-6pm CDT Apr 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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