National Weather Service Forecast for: Ottumwa IA
Issued by: National Weather Service Des Moines, IA
Updated: 11:52 am CDT May 4, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 82. Southwest wind around 13 mph, with gusts as high as 22 mph.
Slight Chance
T-storms

 Tonight

Tonight: A chance of showers and thunderstorms. Increasing clouds, with a low around 48. West wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
 Tuesday

Tuesday: A slight chance of showers before 8am, then a chance of showers after 10am. Mostly cloudy, with a high near 61. North wind 6 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers

 Tuesday
Night
Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 42. North wind 5 to 7 mph.
Slight Chance
Showers

 Wednesday

Wednesday: Mostly cloudy, with a high near 59. North wind 5 to 8 mph.
Mostly Cloudy

 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 40.
Mostly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 66.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 45.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 67.
Mostly Sunny
Hi 82 °F Lo 48 °F Hi 61 °F Lo 42 °F Hi 59 °F Lo 40 °F Hi 66 °F Lo 45 °F Hi 67 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 82. Southwest wind around 13 mph, with gusts as high as 22 mph.
Tonight
 
 A chance of showers and thunderstorms. Increasing clouds, with a low around 48. West wind 6 to 11 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
 A slight chance of showers before 8am, then a chance of showers after 10am. Mostly cloudy, with a high near 61. North wind 6 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 42. North wind 5 to 7 mph.
Wednesday
 
 Mostly cloudy, with a high near 59. North wind 5 to 8 mph.
Wednesday Night
 
 Mostly cloudy, with a low around 40.
Thursday
 
 Mostly sunny, with a high near 66.
Thursday Night
 
 Partly cloudy, with a low around 45.
Friday
 
 Mostly sunny, with a high near 67.
Friday Night
 
 Partly cloudy, with a low around 44.
Saturday
 
 Sunny, with a high near 74.
Saturday Night
 
 A 30 percent chance of showers. Partly cloudy, with a low around 49.
Sunday
 
 A 30 percent chance of showers. Mostly sunny, with a high near 72.

 

Forecast from NOAA-NWS for Ottumwa IA.