National Weather Service Forecast for: Ottumwa IA
Issued by: National Weather Service Des Moines, IA
Updated: 6:57 am CDT May 29, 2026
 
Today

Today: Mostly cloudy, with a high near 84. East southeast wind around 8 mph.
Mostly Cloudy

 Tonight

Tonight: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. East wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Saturday

Saturday: A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 79. East southeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Slight Chance
T-storms
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Chance
Showers
 Sunday

Sunday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Southeast wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Showers
Likely
 Monday

Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Slight Chance
T-storms

 Monday
Night
Monday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 20%.
Slight Chance
T-storms

 Tuesday

Tuesday: Mostly sunny, with a high near 83.
Mostly Sunny
Hi 84 °F Lo 63 °F Hi 79 °F Lo 61 °F Hi 82 °F Lo 62 °F Hi 85 °F Lo 60 °F Hi 83 °F

Hazardous Weather Outlook
 

Today
 
 Mostly cloudy, with a high near 84. East southeast wind around 8 mph.
Tonight
 
 A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. East wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 79. East southeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Southeast wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Monday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 20%.
Tuesday
 
 Mostly sunny, with a high near 83.
Tuesday Night
 
 Partly cloudy, with a low around 57.
Wednesday
 
 Sunny, with a high near 84.
Wednesday Night
 
 Partly cloudy, with a low around 59.
Thursday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Ottumwa IA.