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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

71°F

22°C

Humidity 66%
Wind Speed S 10 mph
Barometer 30.00 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 10 Oct 9:55 am CDT
Extended Forecast for

Grinnell IA

  • Today

    Today: Sunny, with a high near 85. South wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 59. South southeast wind around 11 mph, with gusts as high as 21 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 83. South wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. South wind around 7 mph.

    Low: 67 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 83. Southwest wind 7 to 9 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely, mainly before 1pm. Partly sunny, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 85. South wind 10 to 14 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 59. South southeast wind around 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 83. South wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 67. South wind around 7 mph.
Columbus Day
Sunny, with a high near 83. Southwest wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 72.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 53.
Wednesday
Showers likely, mainly before 1pm. Partly sunny, with a high near 67. Chance of precipitation is 60%.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
9:22 am CDT Oct 10, 2026
Forecast Valid:
10am CDT Oct 10, 2026-6pm CDT Oct 16, 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