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.

Fog/Mist and Windy

66°F

19°C

Humidity 100%
Wind Speed S 26 G 39 mph
Barometer 29.89 in
Dewpoint 66°F (19°C)
Visibility 4.00 mi
Last update 20 Jun 9:35 am CDT
Extended Forecast for

Sumner IA

Heat Advisory June 21, 12:00pm until June 22, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Showers and thunderstorms, mainly before noon. High near 88. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 88 °F

    Breezy.
    T-storms then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 76. Windy, with a south wind 17 to 21 mph, with gusts as high as 31 mph.

    Low: 76 °F

    Mostly Clear
    and Windy

  • Saturday

    Saturday: Sunny, with a high near 93. Heat index values as high as 104. Windy, with a south southwest wind 22 to 26 mph, with gusts as high as 36 mph.

    High: 93 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Windy, with a south southwest wind 18 to 22 mph, with gusts as high as 30 mph.

    Low: 75 °F

    Mostly Clear
    and Windy

  • Sunday

    Sunday: Sunny, with a high near 92. Windy, with a south southwest wind 18 to 25 mph, with gusts as high as 34 mph.

    High: 92 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Windy.

    Low: 74 °F

    Mostly Clear
    and Windy
    then Chance
    Showers and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

    High: 89 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 1pm. High near 80. Chance of precipitation is 80%.

    High: 80 °F

    Showers

Detailed Forecast

Today
Showers and thunderstorms, mainly before noon. High near 88. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Mostly clear, with a low around 76. Windy, with a south wind 17 to 21 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 93. Heat index values as high as 104. Windy, with a south southwest wind 22 to 26 mph, with gusts as high as 36 mph.
Saturday Night
Mostly clear, with a low around 75. Windy, with a south southwest wind 18 to 22 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 92. Windy, with a south southwest wind 18 to 25 mph, with gusts as high as 34 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Windy.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.
Monday Night
Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 80%.
Tuesday
Showers, with thunderstorms also possible after 1pm. High near 80. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sumner IA
 42.87°N 92.1°W
Last Update:
9:14 am CDT Jun 20, 2025
Forecast Valid:
9am CDT Jun 20, 2025-6pm CDT Jun 26, 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