National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

29°C

84°F

Humidity 60%
Wind Speed S 17 km/h
Barometer 30.06 in
Dewpoint 21°C (69°F)
Visibility 16 km
Heat Index31°C (88°F)
Last update 14 Jul 4:15 pm CDT
Extended Forecast for

3 Miles NNW Hartwick IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 31. South wind around 11 km/h.

    High: 31 °C

    Sunny

  • Tonight

    Tonight: Clear, with a low around 19. South wind 5 to 8 km/h.

    Low: 19 °C

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31. South wind 5 to 13 km/h.

    High: 31 °C

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 21. South wind 8 to 10 km/h.

    Low: 21 °C

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 31. South southwest wind 8 to 13 km/h. Chance of precipitation is 50%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 31 °C

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.

    Low: 18 °C

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Mostly cloudy, with a high near 25. Chance of precipitation is 30%.

    High: 25 °C

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 17.

    Low: 17 °C

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 27.

    High: 27 °C

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 31. South wind around 11 km/h.
Tonight
Clear, with a low around 19. South wind 5 to 8 km/h.
Tuesday
Sunny, with a high near 31. South wind 5 to 13 km/h.
Tuesday Night
Partly cloudy, with a low around 21. South wind 8 to 10 km/h.
Wednesday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 31. South southwest wind 8 to 13 km/h. Chance of precipitation is 50%. New rainfall amounts between 2.5 and 5 mm possible.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.
Thursday
A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Mostly cloudy, with a high near 25. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 17.
Friday
Partly sunny, with a high near 27.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 19.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 29.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 19.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
2:05 pm CDT Jul 14, 2025
Forecast Valid:
4pm CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
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