National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

59°F

15°C

Humidity 89%
Wind Speed Calm
Barometer 30.23 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 3 Aug 1:35 am CDT
Extended Forecast for

Grinnell IA

  • Overnight

    Overnight: Areas of smoke between 2am and 3am. Partly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Areas Smoke

  • Sunday

    Sunday: Areas of smoke between 7am and 9am. Mostly sunny, with a high near 76. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 76 °F

    Areas Smoke
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78. Calm wind becoming southeast around 5 mph.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of smoke between 2am and 3am. Partly cloudy, with a low around 55. Calm wind.
Sunday
Areas of smoke between 7am and 9am. Mostly sunny, with a high near 76. Calm wind becoming southeast 5 to 7 mph in the morning.
Sunday Night
Partly cloudy, with a low around 55. Calm wind.
Monday
Mostly sunny, with a high near 78. Calm wind becoming southeast around 5 mph.
Monday Night
Partly cloudy, with a low around 60. Calm wind.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
12:35 am CDT Aug 3, 2025
Forecast Valid:
1am CDT Aug 3, 2025-6pm CDT Aug 9, 2025
 
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