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.

Mostly Cloudy

35°F

2°C

Humidity 59%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 19 Apr 5:55 am CDT
Extended Forecast for

Grinnell IA

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 53. Breezy, with a south wind 5 to 10 mph becoming west northwest 11 to 16 mph in the morning. Winds could gust as high as 23 mph.

    High: 53 °F

    Mostly Cloudy
    and Breezy
    then Sunny

  • Tonight

    Tonight: Clear, with a low around 29. North wind 5 to 8 mph becoming calm after midnight.

    Low: 29 °F

    Clear

  • Monday

    Monday: Widespread frost before 7am. Otherwise, sunny, with a high near 62. South southeast wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 62 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 49. South wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 78. West wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 51.

    Low: 51 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Windy.

    High: 75 °F

    Windy. Mostly
    Sunny then
    Chance
    T-storms

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 53. Breezy, with a south wind 5 to 10 mph becoming west northwest 11 to 16 mph in the morning. Winds could gust as high as 23 mph.
Tonight
Clear, with a low around 29. North wind 5 to 8 mph becoming calm after midnight.
Monday
Widespread frost before 7am. Otherwise, sunny, with a high near 62. South southeast wind 5 to 14 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 49. South wind 10 to 13 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 78. West wind 7 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Clear, with a low around 51.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Windy.
Thursday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 48. Breezy. Chance of precipitation is 80%.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 62.
Friday Night
Partly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
5:46 am CDT Apr 19, 2026
Forecast Valid:
6am CDT Apr 19, 2026-6pm CDT Apr 25, 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