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.

Partly Cloudy

42°F

6°C

Humidity 60%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 1 May 8:35 am CDT
Extended Forecast for

Lynnville IA

Frost Advisory May 2, 01:00am until May 2, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Today

    Today: A chance of rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 58. Calm wind becoming north northwest 5 to 9 mph in the morning. Chance of precipitation is 30%.

    High: 58 °F

    Partly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 8pm, then a chance of sprinkles between 8pm and 9pm. Areas of frost after 4am. Otherwise, partly cloudy, with a low around 34. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 10%.

    Low: 34 °F

    Slight Chance
    Showers then
    Areas Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 61. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 61 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44. South southwest wind 5 to 9 mph.

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74. South southwest wind 10 to 13 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 78.

    High: 78 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers. Partly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers. Partly sunny, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 58. Calm wind becoming north northwest 5 to 9 mph in the morning. Chance of precipitation is 30%.
Tonight
A slight chance of showers before 8pm, then a chance of sprinkles between 8pm and 9pm. Areas of frost after 4am. Otherwise, partly cloudy, with a low around 34. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 10%.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 61. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 44. South southwest wind 5 to 9 mph.
Sunday
Partly sunny, with a high near 74. South southwest wind 10 to 13 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 47.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 78.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 44.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lynnville IA
 41.58°N 92.78°W
Last Update:
5:56 am CDT May 1, 2026
Forecast Valid:
8am CDT May 1, 2026-6pm CDT May 7, 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