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Sumner, IA Weather Forecast
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Sumner Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Sunny | Partly Cloudy | Showers | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 59°FHi: 15°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C |
| POP: 20% | POP: 50% | POP: 70% | POP: 20% | POP: 80% | POP: 60% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 314 AM CDT Fri Sep 25 2026 
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Issued: 323 AM CDT Fri Sep 25 2026
Key Messages
- Another cool, cloudy, and wet period expected through Sunday. Expect several rounds of rainfall along with a few embedded thunderstorms. No severe weather is expected.
- High confidence /70-100%/ that portions of Iowa will receive over 1+" of rainfall by Sunday with portions of western and southwestern Iowa having a 30-70% chance of seeing 2+".
- Another strong storm system expected Tuesday and Tuesday night. Thunderstorms with additional heavy rainfall possible.
- Temperatures generally r...