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.

Overcast

62°F

17°C

Humidity 86%
Wind Speed SE 14 mph
Barometer 29.76 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 15 Apr 12:15 pm CDT
Extended Forecast for

Grinnell IA

Severe T-storm Watch until April 15, 07:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until April 15, 07:00pm

    NOW until 7:00pm Wed

    Severe T-storm Watch

  • This Afternoon

    High: 72 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Mostly cloudy, with a low around 51. West wind 5 to 7 mph becoming east northeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 74. Northwest wind around 7 mph becoming south southwest in the afternoon.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 76. Windy, with a south southeast wind 13 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Slight Chance
    T-storms and
    Breezy then
    T-storms and
    Windy

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 35. Breezy. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Breezy.
    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: A 10 percent chance of showers before 7am. Sunny, with a high near 49. Breezy.

    High: 49 °F

    Breezy.
    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 5pm. Some of the storms could be severe. Mostly cloudy, with a high near 72. South southwest wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Mostly cloudy, with a low around 51. West wind 5 to 7 mph becoming east northeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Sunny, with a high near 74. Northwest wind around 7 mph becoming south southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 54. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Friday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 76. Windy, with a south southeast wind 13 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 35. Breezy. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
A 10 percent chance of showers before 7am. Sunny, with a high near 49. Breezy.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 72. Breezy.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
12:31 pm CDT Apr 15, 2026
Forecast Valid:
12pm 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