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Alton, IA Weather Forecast
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Alton Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  | | |  | |  | |  |  |  |
| Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Showers Likely | Chance of T-Storm | Chance of T-Storm | Showers | Chance of Showers | Mostly Sunny | Partly Cloudy | Partly Sunny |
| Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 59°FLo: 15°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 55°FHi: 13°C | Lo: 45°FLo: 7°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 51°FHi: 11°C |
| POP: 100% | POP: 40% | POP: 50% | POP: 50% | POP: 70% | POP: 100% | POP: 100% | POP: 80% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 634 PM CDT Fri Oct 30 2026 
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Issued: 149 PM CDT Fri Oct 30 2026
Key Messages
- Showers and very isolated thunderstorms are likely tonight into Saturday morning, mainly near and east of Highway 81. Drizzle and spotty showers will be possible west of Highway 81. No severe weather expected.
- A more widespread rain returns later Sunday night into Monday night. The latest guidance suggests about a 60-90 percent chance for more than an inch of rain. Flooding is unlikely, but not zero. Additional rainfall is likely on Tuesday.
- A low confidence threat for low topped sup...