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

Hazardous Weather Conditions

Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Overcast

67°F

19°C

Humidity 87%
Wind Speed W 6 mph
Barometer 29.68 in (1004.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 31 Jul 9:53 pm CDT
Extended Forecast for

Harper IA

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Low around 63. Breezy, with a north wind 10 to 15 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers and
    Breezy

  • Saturday

    Saturday: Showers and thunderstorms before 11am, then a slight chance of showers between 11am and 1pm. High near 77. Breezy, with a north wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%.

    High: 77 °F

    Breezy.
    Showers then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 80. North wind around 10 mph, with gusts as high as 20 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms before 4am, then showers and possibly a thunderstorm, mainly after 4am. Low around 63. Breezy, with a north wind 10 to 15 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and thunderstorms before 11am, then a slight chance of showers between 11am and 1pm. High near 77. Breezy, with a north wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%.
Saturday Night
Partly cloudy, with a low around 61. North wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 80. North wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 83.
Tuesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63.
Wednesday
Partly sunny, with a high near 80.
Wednesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harper IA
 41.37°N 92.06°W (Elev. 827 ft)
Last Update:
1:51 pm CDT Jul 31, 2026
Forecast Valid:
10pm CDT Jul 31, 2026-6pm CDT Aug 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation