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

32°F

0°C

Humidity 89%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 8 Mar 12:55 am CDT
Extended Forecast for

3 Miles NNW Hartwick IA

  • Overnight

    Overnight: Mostly clear, with a temperature rising to around 35 by 3am. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 32 °F⇑

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. Breezy, with a southwest wind 14 to 16 mph, with gusts as high as 28 mph.

    High: 64 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 43. Breezy, with a southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    Low: 43 °F

    Clear and
    Breezy

  • Monday

    Monday: Sunny, with a high near 68. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 44. South southwest wind around 6 mph becoming north northeast after midnight.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: A chance of rain between noon and 3pm, then a chance of rain and thunderstorms after 3pm. Mostly sunny, with a high near 68. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms, then rain likely after midnight. Mostly cloudy, with a low around 32. Breezy. Chance of precipitation is 60%.

    Low: 32 °F

    Breezy.
    Chance
    T-storms then
    Rain Likely

  • Wednesday

    Wednesday: A chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 44. Breezy. Chance of precipitation is 40%.

    High: 44 °F

    Breezy.
    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a temperature rising to around 35 by 3am. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 64. Breezy, with a southwest wind 14 to 16 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 43. Breezy, with a southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 68. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Clear, with a low around 44. South southwest wind around 6 mph becoming north northeast after midnight.
Tuesday
A chance of rain between noon and 3pm, then a chance of rain and thunderstorms after 3pm. Mostly sunny, with a high near 68. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of rain and thunderstorms, then rain likely after midnight. Mostly cloudy, with a low around 32. Breezy. Chance of precipitation is 60%.
Wednesday
A chance of rain before noon, then a slight chance of rain and snow. Partly sunny, with a high near 44. Breezy. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 25.
Thursday
Mostly sunny, with a high near 50.
Thursday Night
Mostly cloudy, with a low around 39. Breezy.
Friday
Partly sunny, with a high near 55. Breezy.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
Mostly cloudy, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
10:22 pm CST Mar 7, 2026
Forecast Valid:
12am CST Mar 8, 2026-6pm CDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation