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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

57°F

14°C

Humidity 96%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 56°F (13°C)
Visibility 7.00 mi
Last update 28 Aug 4:35 am CDT
Extended Forecast for

Montezuma IA

  • Today

    Today: Sunny, with a high near 84. Light southwest wind.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Calm wind becoming south southeast 5 to 7 mph in the evening.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before noon. Cloudy, then gradual clearing during the afternoon, with a high near 85. South wind 8 to 15 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. South wind 11 to 13 mph, with gusts as high as 24 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 84. Light southwest wind.
Tonight
Partly cloudy, with a low around 64. Calm wind becoming south southeast 5 to 7 mph in the evening.
Saturday
A 30 percent chance of showers, mainly before noon. Cloudy, then gradual clearing during the afternoon, with a high near 85. South wind 8 to 15 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 72. South wind 11 to 13 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 93. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.
Monday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 71.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Montezuma IA
 41.57°N 92.52°W
Last Update:
3:47 am CDT Aug 28, 2026
Forecast Valid:
4am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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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