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National Weather Service Flood Inundation Mapping Available for Iowa in September 2025

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

62°F

17°C

Humidity	84%
Wind Speed	SW 5 mph
Barometer	29.88 in (1011.5 mb)
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Last update	3 Sep 7:53 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Chillicothe IA

Today
High: 74 °F
Chance
Showers
Tonight
Low: 45 °F
Partly Cloudy
Thursday
High: 74 °F
Sunny
Thursday Night
Low: 52 °F
Chance
Showers
Friday
High: 69 °F
Sunny
Friday Night
Low: 45 °F
Mostly Clear
Saturday
High: 73 °F
Sunny
Saturday Night
Low: 45 °F
Mostly Clear
Sunday
High: 74 °F
Sunny

Detailed Forecast

Today

A chance of showers and thunderstorms between 9am and 4pm, then a slight chance of showers. Mostly cloudy, with a high near 74. West southwest wind 7 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Partly cloudy, with a low around 45. North northwest wind 5 to 11 mph, with gusts as high as 20 mph.

Thursday

Sunny, with a high near 74. Light west northwest wind becoming west southwest 5 to 9 mph in the morning.

Thursday Night

A 30 percent chance of showers, mainly before 1am. Partly cloudy, with a low around 52. South southwest wind 8 to 10 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.

Friday

Sunny, with a high near 69. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.

Friday Night

Mostly clear, with a low around 45.

Saturday

Sunny, with a high near 73.

Saturday Night

Mostly clear, with a low around 45.

Sunday

Sunny, with a high near 74.

Sunday Night

Mostly clear, with a low around 50.