Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Overcast

80°F

27°C

Humidity 82%
Wind Speed S 5 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 25 Jul 1:53 pm CDT
Extended Forecast for

4 Miles SSE 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
  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 90. Heat index values as high as 100. Southwest wind 3 to 5 mph.

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Calm wind becoming south southeast around 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 9am.  Mostly cloudy through mid morning, then becoming sunny, with a high near 96. Heat index values as high as 112. South southwest wind 5 to 10 mph.

    High: 96 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77. South southwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 77 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 96. West southwest wind around 11 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 90. Heat index values as high as 100. Southwest wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 72. Calm wind becoming south southeast around 5 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 9am. Mostly cloudy through mid morning, then becoming sunny, with a high near 96. Heat index values as high as 112. South southwest wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 77. South southwest wind around 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 96. West southwest wind around 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 72.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Martinsburg IA
 41.11°N 92.24°W
1:26 pm CDT Jul 25, 2026
2pm CDT Jul 25, 2026-6pm CDT Jul 31, 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