| National Weather Service Forecast for:
Ottumwa IA Issued by: National Weather Service Des Moines, IA |
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| Updated: 1:31 am CDT Aug 20, 2026 | ||||||||||||||||||
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| Overnight |
Patchy fog. Otherwise, partly cloudy, with a low around 64. North northeast wind 3 to 5 mph. |
| Thursday |
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light east wind. |
| Thursday Night |
Mostly clear, with a low around 66. Light southeast wind. |
| Friday |
A 10 percent chance of showers after 5pm. Sunny, with a high near 86. Light and variable wind becoming west 5 to 8 mph in the morning. |
| Friday Night |
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. North northwest wind 3 to 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
| Saturday |
Sunny, with a high near 82. |
| Saturday Night |
Mostly clear, with a low around 61. |
| Sunday |
Mostly sunny, with a high near 80. |
| Sunday Night |
Mostly cloudy, with a low around 62. |
| Monday |
Mostly sunny, with a high near 79. |
| Monday Night |
Partly cloudy, with a low around 64. |
| Tuesday |
Mostly sunny, with a high near 83. |
| Tuesday Night |
Partly cloudy, with a low around 66. |
| Wednesday |
Mostly sunny, with a high near 84. |
Forecast from NOAA-NWS for Ottumwa IA.
