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

Oelwein Municipal Airport (KOLZ)

Lat: 42.68°NLon: 91.98°WElev: 1070ft.

Fair

66°F

19°C

Humidity 94%
Wind Speed N 8 mph
Barometer 29.94 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 19 Aug 4:35 am CDT
Extended Forecast for

Donnan IA

  • Today

    Today: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 76. North wind 3 to 5 mph.

    High: 76 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 57. Calm wind.

    Low: 57 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 77. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 63. South wind 7 to 9 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Mostly Clear
    then Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 78. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Northwest wind 5 to 7 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Northwest wind 5 to 11 mph.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. North wind 5 to 7 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 73. Light and variable wind becoming northeast around 5 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 76. North wind 3 to 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 57. Calm wind.
Thursday
Sunny, with a high near 77. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 63. South wind 7 to 9 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 78. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 61. Northwest wind 5 to 7 mph.
Saturday
Sunny, with a high near 76. Northwest wind 5 to 11 mph.
Saturday Night
Mostly clear, with a low around 58. North wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 73. Light and variable wind becoming northeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Light southeast wind.
Monday
Mostly sunny, with a high near 75. Southeast wind 3 to 5 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 78. Southwest wind 5 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Donnan IA
 42.89°N 91.86°W
Last Update:
3:16 am CDT Aug 19, 2026
Forecast Valid:
4am CDT Aug 19, 2026-6pm CDT Aug 25, 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