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Alton, MO 7-Day Weather Forecast
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Alton Weather Forecast
Alton, MO Weather Forecast Date: 523 AM CDT Tue Sep 08 2026
Weather forecast for Alton, MO
Today Hi: 99°FHi: 37°C Lo: 70°F Lo: 21°C |
Today... Sunny, hot with highs in the upper 90s. Light and variable winds, becoming southeast around 5 mph this afternoon. |
Wed Hi: 100°FHi: 38°C Lo: 71°F Lo: 22°C |
Wednesday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs around 100. Southwest winds around 5 mph. Chance of rain 20%. Heat index values up to 108. |
| Thu Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Thursday... Showers with a slight chance of thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Not as hot. Humid with highs in the upper 80s. Northwest winds around 5 mph. Chance of rain 90%. |
| Fri Hi: 90°FHi: 32°C Lo: 65°F Lo: 18°C |
Friday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Hot with highs around 90. Chance of rain 20%. |
| Sat Hi: 91°FHi: 33°C Lo: 69°F Lo: 21°C |
Saturday... Mostly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the lower 90s. Chance of rain 40%. |
| Sun Hi: 91°FHi: 33°C Lo: 65°F Lo: 18°C |
Sunday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the lower 90s. Chance of rain 20%. |
| Mon Hi: 90°FHi: 32°C |
Monday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Hot with highs around 90. Chance of rain 20%. |
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