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.

Heavy Rain

64°F

18°C

Humidity 92%
Wind Speed Calm
Barometer 29.84 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 May 10:15 pm CDT
Extended Forecast for

2 Miles SSE Lynnville IA

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 56. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    T-storms and
    Breezy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 9am. Mostly cloudy, with a high near 64. Breezy, with a northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Breezy.
    Chance
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming clear, with a low around 42. North wind 6 to 11 mph, with gusts as high as 18 mph.

    Low: 42 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Increasing clouds, with a high near 62. Northeast wind 6 to 8 mph.

    High: 62 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45. East northeast wind 3 to 6 mph.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 64. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.

    Low: 48 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 56. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 9am. Mostly cloudy, with a high near 64. Breezy, with a northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Mostly cloudy, then gradually becoming clear, with a low around 42. North wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday
Increasing clouds, with a high near 62. Northeast wind 6 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 45. East northeast wind 3 to 6 mph.
Thursday
A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 64. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 59.
Memorial Day
Partly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Lynnville IA
 41.55°N 92.78°W
Last Update:
10:43 pm CDT May 18, 2026
Forecast Valid:
11pm CDT May 18, 2026-6pm CDT May 25, 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