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 Alton Weather Forecast Summary |
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Today
Jan 10th
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Sunday
Jan 11th
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Monday
Jan 12th
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Tuesday
Jan 13th
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Wednesday
Jan 14th
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Cloudy |
Cloudy |
Cloudy |
Cloudy |
Mostly Sunny |
32°F
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37°F
17°F |
45°F
30°F |
50°F
39°F |
34°F
18°F |
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| Alton Detailed Weather Forecast |
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| Saturday, January 10th, 2026 |
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Afternoon |
Temperature: 25°F |
| Sunny. Windy. |
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Evening |
Temperature: 21°F |
| Clear. Windy. |
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| Sunday, January 11th, 2026 |
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Overnight |
Temperature: 18°F |
| A mix of cloudy and clear skies. Windy at times. |
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Morning |
Temperature: 28°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 33°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 32°F |
| Cloudy. |
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| Monday, January 12th, 2026 |
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Overnight |
Temperature: 31°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 39°F |
| Cloudy. |
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Afternoon |
Temperature: 41°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 39°F |
| Cloudy. Windy at times. |
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| Tuesday, January 13th, 2026 |
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Overnight |
Temperature: 43°F |
| Cloudy. Windy. |
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Morning |
Temperature: 47°F |
| Cloudy. Windy. |
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Afternoon |
Temperature: 47°F |
| Cloudy. Windy at times. |
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Evening |
Temperature: 42°F |
| Cloudy. Windy. |
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| Wednesday, January 14th, 2026 |
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Overnight |
Temperature: 27°F |
| Clear with cloudy periods with a slight chance of flurries or showers. Risk of freezing rain. Wind 20 to 30 mph. |
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Morning |
Temperature: 22°F |
| Sunny. Windy. |
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Afternoon |
Temperature: 22°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 18°F |
| Clear. |
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| Thursday, January 15th, 2026 |
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Overnight |
Temperature: 17°F |
| Cloudy. |
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Morning |
Temperature: 28°F |
| Cloudy. Windy. |
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Afternoon |
Temperature: 32°F |
| Cloudy. Windy at times. |
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Evening |
Temperature: 34°F |
| Cloudy. Windy. |
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| Friday, January 16th, 2026 |
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Overnight |
Temperature: 29°F |
| Cloudy. Windy. |
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Morning |
Temperature: 31°F |
| Cloudy. Windy. |
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Afternoon |
Temperature: 30°F |
| A mix of cloud and sun. Windy at times. |
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Evening |
Temperature: 25°F |
| Clear with cloudy periods. Windy at times. |
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| Saturday, January 17th, 2026 |
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Overnight |
Temperature: 20°F |
| Cloudy. Windy at times. |
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Morning |
Temperature: 23°F |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 25°F |
| Sunny with cloudy periods. |
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Evening |
Temperature: 24°F |
| Clear. Windy at times. |
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| Sunday, January 18th, 2026 |
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Overnight |
Temperature: 26°F |
| Clear. Windy at times. |
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Morning |
Temperature: 34°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 31°F |
| Sunny. |
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Evening |
Temperature: 27°F |
| Clear. |
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