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 Alton Weather Forecast Summary |
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Today
Dec 9th
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Wednesday
Dec 10th
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Thursday
Dec 11th
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Friday
Dec 12th
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Saturday
Dec 13th
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Mix of rain and snow |
Cloudy |
Flurries |
Cloudy |
Flurries |
41°F
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27°F
13°F |
25°F
15°F |
20°F
10°F |
9°F
-8°F |
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| Alton Detailed Weather Forecast |
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| Wednesday, December 10th, 2025 |
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Overnight |
Temperature: 25°F |
| Mostly cloudy with a chance of flurries. Wind 20 to 30 mph. |
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Morning |
Temperature: 21°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 18°F |
| Cloudy. |
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Evening |
Temperature: 14°F |
| Cloudy. |
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| Thursday, December 11th, 2025 |
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Overnight |
Temperature: 15°F |
| Cloudy. |
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Morning |
Temperature: 20°F |
| Cloudy with flurries likely. |
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Afternoon |
Temperature: 25°F |
| Cloudy with flurries likely. |
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Evening |
Temperature: 18°F |
| Cloudy. |
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| Friday, December 12th, 2025 |
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Overnight |
Temperature: 19°F |
| Cloudy. |
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Morning |
Temperature: 18°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 10°F |
| Cloudy. |
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Evening |
Temperature: 10°F |
| Cloudy with a slight chance of flurries. |
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| Saturday, December 13th, 2025 |
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Overnight |
Temperature: 8°F |
| Cloudy with flurries likely. |
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Morning |
Temperature: 7°F |
| Cloudy with flurries likely. |
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Afternoon |
Temperature: -5°F |
| Sunny. |
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Evening |
Temperature: -7°F |
| A mix of cloudy and clear skies. |
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| Sunday, December 14th, 2025 |
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Overnight |
Temperature: -10°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 0°F |
| Cloudy. |
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Afternoon |
Temperature: 4°F |
| Sunny. |
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Evening |
Temperature: 8°F |
| Clear. Windy at times. |
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| Monday, December 15th, 2025 |
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Overnight |
Temperature: 15°F |
| Cloudy. Windy at times. |
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Morning |
Temperature: 18°F |
| Cloudy. |
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Afternoon |
Temperature: 15°F |
| Cloudy with sunny periods. |
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Evening |
Temperature: 17°F |
| Cloudy. |
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| Tuesday, December 16th, 2025 |
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Overnight |
Temperature: 21°F |
| Cloudy. |
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Morning |
Temperature: 30°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 36°F |
| Cloudy. |
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Evening |
Temperature: 32°F |
| Cloudy. Windy at times. |
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| Wednesday, December 17th, 2025 |
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Overnight |
Temperature: 33°F |
| Cloudy. Windy at times. |
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Morning |
Temperature: 33°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 30°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 25°F |
| Clear with cloudy periods. Windy at times. |
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