Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

66°F

19°C

Humidity 95%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 64°F (18°C)
Visibility 7.00 mi
Last update 15 Jul 5:15 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: Sunny, with a high near 87. South wind 5 to 9 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. South southeast wind 3 to 5 mph.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 84. South wind 6 to 8 mph becoming west in the afternoon.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 60. North northwest wind 6 to 8 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm.  Mostly cloudy, with a high near 72. North wind 8 to 10 mph.

    High: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 87. South wind 5 to 9 mph.
Tonight
Mostly clear, with a low around 70. South southeast wind 3 to 5 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. South wind 6 to 8 mph becoming west in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. North northwest wind 6 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 72. North wind 8 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 79.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
4:36 am CDT Jul 15, 2025
5am CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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