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.

Fog/Mist

66°F

19°C

Humidity 95%
Wind Speed S 7 mph
Barometer 30.02 in
Dewpoint 65°F (18°C)
Visibility 5.00 mi
Last update 25 Jul 12:35 am CDT
Extended Forecast for

Montezuma IA

Extreme Heat Watch July 26, 12:00pm until July 27, 10:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Overnight

    Overnight: A slight chance of drizzle before 3am. Patchy fog. Otherwise, cloudy, with a low around 65. South wind around 6 mph.

    Low: 65 °F

    Slight Chance
    Drizzle and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Light south southwest wind.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70. Light south southwest wind.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Heat index values as high as 107. South southwest wind 5 to 8 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of drizzle before 3am. Patchy fog. Otherwise, cloudy, with a low around 65. South wind around 6 mph.
Saturday
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Light south southwest wind.
Saturday Night
Partly cloudy, with a low around 70. Light south southwest wind.
Sunday
Mostly sunny, with a high near 94. Heat index values as high as 107. South southwest wind 5 to 8 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montezuma IA
 41.57°N 92.52°W
Last Update:
9:43 pm CDT Jul 24, 2026
Forecast Valid:
12am CDT Jul 25, 2026-6pm CDT Jul 31, 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