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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

64°F

18°C

Humidity 93%
Wind Speed NW 5 mph
Barometer 30.06 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 22 Aug 1:15 am CDT
Extended Forecast for

Montezuma IA

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 66. North northwest wind 3 to 5 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83. West northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. North wind 3 to 5 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81. Light north wind.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. Light and variable wind.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 66. North northwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 83. West northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 58. North wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 81. Light north wind.
Sunday Night
Partly cloudy, with a low around 60. Light and variable wind.
Monday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montezuma IA
 41.57°N 92.52°W
Last Update:
10:21 pm CDT Aug 21, 2026
Forecast Valid:
1am CDT Aug 22, 2026-6pm CDT Aug 28, 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