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

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Partly Cloudy

74°F

23°C

Humidity 62%
Wind Speed E 6 mph
Barometer 30.30 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 2 Aug 3:55 pm CDT
Extended Forecast for

Sully IA

  • This Afternoon

    This Afternoon: Areas of smoke. Mostly sunny, with a high near 77. East southeast wind around 6 mph.

    High: 77 °F

    Areas Smoke

  • Tonight

    Tonight: Areas of smoke. Mostly cloudy, with a low around 54. East southeast wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Areas Smoke

  • Sunday

    Sunday: Areas of smoke before 9am. Mostly sunny, with a high near 77. Calm wind becoming south southeast around 6 mph in the morning.

    High: 77 °F

    Areas Smoke
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. Light east wind.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Calm wind becoming southeast around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Areas of smoke. Mostly sunny, with a high near 77. East southeast wind around 6 mph.
Tonight
Areas of smoke. Mostly cloudy, with a low around 54. East southeast wind around 5 mph becoming calm in the evening.
Sunday
Areas of smoke before 9am. Mostly sunny, with a high near 77. Calm wind becoming south southeast around 6 mph in the morning.
Sunday Night
Partly cloudy, with a low around 56. Light east wind.
Monday
Mostly sunny, with a high near 79. Calm wind becoming southeast around 5 mph.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
2:51 pm CDT Aug 2, 2025
Forecast Valid:
4pm CDT Aug 2, 2025-6pm CDT Aug 8, 2025
 
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