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.

Partly Cloudy

78°F

26°C

Humidity 83%
Wind Speed S 9 mph
Barometer 29.79 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 29 Jun 1:55 am CDT
Extended Forecast for

Montezuma IA

Extreme Heat Warning June 29, 02:15am until June 30, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 02:15am until June 30, 09:00pm

    NOW until 9:00pm Tue

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 92. Heat index values as high as 106. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.

    High: 92 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75. Breezy, with a south wind 11 to 18 mph, with gusts as high as 29 mph.

    Low: 75 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 103. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 94 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Breezy.

    High: 93 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

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

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 75. South wind 11 to 14 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 92. Heat index values as high as 106. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 75. Breezy, with a south wind 11 to 18 mph, with gusts as high as 29 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 103. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 74. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Wednesday
Sunny, with a high near 93. Breezy.
Wednesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 72.
Friday
Sunny, with a high near 91.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 71.
Independence Day
Mostly sunny, with a high near 90.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Montezuma IA
 41.57°N 92.52°W
Last Update:
1:27 am CDT Jun 29, 2026
Forecast Valid:
2am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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