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.

Partly Cloudy

83°F

28°C

Humidity 63%
Wind Speed W 13 G 16 mph
Barometer 30.00 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 21 Aug 5:35 pm CDT
Extended Forecast for

5 Miles SSW Malcom IA

  • Tonight

    Tonight: Mostly clear, with a low around 63. Northwest wind 5 to 9 mph becoming light north after midnight.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83. Light north northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Calm wind.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 78.

    High: 78 °F

    Slight 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 before 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Northwest wind 5 to 9 mph becoming light north after midnight.
Saturday
Sunny, with a high near 83. Light north northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
Mostly clear, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 81. Calm wind.
Sunday Night
Mostly cloudy, with a low around 60. Calm wind.
Monday
A 20 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 before 1pm. Partly sunny, with a high near 83.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 62.
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:
5 Miles SSW Malcom IA
 41.64°N 92.6°W
Last Update:
2:51 pm CDT Aug 21, 2026
Forecast Valid:
5pm CDT Aug 21, 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