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

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

17°F

-8°C

Humidity 62%
Wind Speed E 7 mph
Barometer 30.28 in (1027.1 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 23 Feb 8:53 pm CST
Extended Forecast for

Thornburg IA

  • Tonight

    Tonight: Partly cloudy, with a low around 13. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. South wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 30 mph.

    High: 47 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Increasing clouds, with a high near 36. Northwest wind around 5 mph becoming northeast in the afternoon.

    High: 36 °F

    Sunny then
    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 23 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 13. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 47. South wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of snow after noon. Increasing clouds, with a high near 36. Northwest wind around 5 mph becoming northeast in the afternoon.
Wednesday Night
Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 23. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 27.
Friday
Sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 17.
Sunday
A 40 percent chance of snow. Partly sunny, with a high near 32.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 18.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornburg IA
 41.46°N 92.35°W (Elev. 902 ft)
Last Update:
8:37 pm CST Feb 23, 2026
Forecast Valid:
8pm CST Feb 23, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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