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

Hazardous Weather Conditions

Current conditions at

Oelwein Municipal Airport (KOLZ)

Lat: 42.68°NLon: 91.98°WElev: 1070ft.

Fair

88°F

31°C

Humidity 75%
Wind Speed SE 6 mph
Barometer 29.92 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 1 Sep 4:55 pm CDT
Extended Forecast for

Sumner IA

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. Light and variable wind becoming south 5 to 7 mph in the evening.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 88. Southeast wind 7 to 10 mph becoming southwest in the morning.

    High: 88 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 71. Light and variable wind becoming southeast around 6 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. South southeast wind 5 to 9 mph becoming north northwest in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. South southeast wind around 8 mph.

    Low: 71 °F

    Mostly Clear
    then Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Clear
    then Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 70. Light and variable wind becoming south 5 to 7 mph in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 88. Southeast wind 7 to 10 mph becoming southwest in the morning.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 71. Light and variable wind becoming southeast around 6 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. South southeast wind 5 to 9 mph becoming north northwest in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. South southeast wind around 8 mph.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 64.
Labor Day
Partly sunny, with a high near 78.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 61.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 78. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Sumner IA
 42.87°N 92.1°W
Last Update:
3:26 pm CDT Sep 1, 2026
Forecast Valid:
5pm CDT Sep 1, 2026-6pm CDT Sep 8, 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