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

81°F

27°C

Humidity 16%
Wind Speed W 6 mph
Barometer 29.86 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 21 Apr 4:35 pm CDT
Extended Forecast for

3 Miles NNW Hartwick IA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. West wind around 9 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. Light and variable wind becoming south around 6 mph after midnight.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. South wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 10 mph, with gusts as high as 18 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Breezy, with a south wind 13 to 20 mph, with gusts as high as 30 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 53. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers and
    Breezy

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. West wind around 9 mph.
Tonight
Mostly clear, with a low around 54. Light and variable wind becoming south around 6 mph after midnight.
Wednesday
Sunny, with a high near 80. South wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 10 mph, with gusts as high as 18 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Breezy, with a south wind 13 to 20 mph, with gusts as high as 30 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 53. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 46.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 70.
Sunday Night
Showers likely. Mostly cloudy, with a low around 50. Breezy. Chance of precipitation is 60%.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.
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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:
4:22 pm CDT Apr 21, 2026
Forecast Valid:
4pm CDT Apr 21, 2026-6pm CDT Apr 27, 2026
 
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Additional Resources

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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