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 and Windy

70°F

21°C

Humidity 59%
Wind Speed SW 26 G 35 mph
Barometer 29.83 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 12 Apr 10:55 am CDT
Extended Forecast for

Grinnell 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 70. Windy, with a south southwest wind 22 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers
    Likely and
    Windy

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 59. Breezy, with a south southwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms and
    Breezy then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 78. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.

    High: 78 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Breezy, with a south southwest wind 10 to 17 mph, with gusts as high as 28 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 81. South southwest wind 8 to 14 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 60%.

    High: 74 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.

    Low: 52 °F

    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 77.

    High: 77 °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 70. Windy, with a south southwest wind 22 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 59. Breezy, with a south southwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Monday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 78. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Breezy, with a south southwest wind 10 to 17 mph, with gusts as high as 28 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 81. South southwest wind 8 to 14 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.
Thursday
Sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 57.
Friday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 76. Windy. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 43. Breezy. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 56. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
9:52 am CDT Apr 12, 2026
Forecast Valid:
11am CDT Apr 12, 2026-6pm CDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation