Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

86°F

30°C

Humidity 75%
Wind Speed W 5 mph
Barometer 29.90 in (1011.5 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 26 Jul 10:53 am CDT
Extended Forecast for

4 Miles S Martinsburg IA

Extreme Heat Watch July 26, 09:00pm until July 27, 10:00pm
Extreme Heat Warning July 26, 12:00pm until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning
  • Today

    Today: Mostly sunny and hot, with a high near 97. Heat index values as high as 114. West wind 7 to 9 mph.

    High: 97 °F

    Hot

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 2am and 4am.  Partly cloudy, with a low around 77. West southwest wind 9 to 11 mph becoming south in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 97. Heat index values as high as 110. Southwest wind around 11 mph, with gusts as high as 18 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. West wind 7 to 9 mph becoming north after midnight.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Northeast wind around 8 mph.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny and hot, with a high near 97. Heat index values as high as 114. West wind 7 to 9 mph.
Tonight
A slight chance of showers and thunderstorms between 2am and 4am. Partly cloudy, with a low around 77. West southwest wind 9 to 11 mph becoming south in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 97. Heat index values as high as 110. Southwest wind around 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 73. West wind 7 to 9 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 90. Northeast wind around 8 mph.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Martinsburg IA
 41.13°N 92.27°W
6:31 am CDT Jul 26, 2026
11am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
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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