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

58°F

14°C

Humidity 87%
Wind Speed Calm
Barometer 29.75 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Apr 7:55 am CDT
Extended Forecast for

3 Miles NNW Hartwick IA

  • Today

    Today: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 72. South wind 6 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before midnight. Some of the storms could be severe. Mostly cloudy, with a low around 52. East wind around 7 mph becoming west after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 74. West northwest wind 6 to 8 mph.

    High: 74 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. South wind 5 to 8 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 77. Breezy, with a south wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Breezy.
    Mostly Sunny
    then T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 37. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 49. Breezy.

    High: 49 °F

    Slight Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. Blustery.

    Low: 30 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 72. South wind 6 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 50 percent chance of showers and thunderstorms, mainly before midnight. Some of the storms could be severe. Mostly cloudy, with a low around 52. East wind around 7 mph becoming west after midnight. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 74. West northwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 54. South wind 5 to 8 mph.
Friday
Showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 77. Breezy, with a south wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 37. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 49. Breezy.
Saturday Night
Partly cloudy, with a low around 30. Blustery.
Sunday
Sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
6:46 am CDT Apr 15, 2026
Forecast Valid:
8am CDT Apr 15, 2026-6pm CDT Apr 21, 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