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 Alton Weather Forecast Summary |
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Today
May 14th
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Friday
May 15th
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Saturday
May 16th
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Sunday
May 17th
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Monday
May 18th
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Mostly Sunny |
Mostly Sunny |
Mix of Sun and Cloud |
Mostly Sunny |
Showers |
24°C
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24°C
13°C |
24°C
12°C |
26°C
14°C |
24°C
17°C |
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| Alton Detailed Weather Forecast |
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| Thursday, May 14th, 2026 |
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Overnight |
Temperature: 13°C |
| Clear. Windy at times. |
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Morning |
Temperature: 16°C |
| Sunny. Windy. |
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Afternoon |
Temperature: 24°C |
| Sunny with cloudy periods. Windy at times. |
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Evening |
Temperature: 18°C |
| A mix of cloudy and clear skies. Windy at times. |
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| Friday, May 15th, 2026 |
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Overnight |
Temperature: 14°C |
| Mostly clear. |
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Morning |
Temperature: 17°C |
| Sunny. Windy. |
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Afternoon |
Temperature: 24°C |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 20°C |
| Clear with cloudy periods. Windy at times. |
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| Saturday, May 16th, 2026 |
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Overnight |
Temperature: 14°C |
| Mostly clear. Windy at times. |
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Morning |
Temperature: 16°C |
| Mostly sunny. Windy at times. |
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Afternoon |
Temperature: 24°C |
| Mostly cloudy. Windy at times. |
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Evening |
Temperature: 21°C |
| Mostly cloudy. |
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| Sunday, May 17th, 2026 |
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Overnight |
Temperature: 16°C |
| A mix of clear and cloudy skies. Windy at times. |
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Morning |
Temperature: 18°C |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 26°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 20°C |
| Clear with cloudy periods. Windy. |
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| Monday, May 18th, 2026 |
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Overnight |
Temperature: 18°C |
| Mostly cloudy. Windy at times. |
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Morning |
Temperature: 20°C |
| Mostly cloudy. Windy. |
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Afternoon |
Temperature: 22°C |
| Cloudy with a chance of showers. Windy. |
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Evening |
Temperature: 18°C |
| Cloudy with a few showers. Windy. |
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| Tuesday, May 19th, 2026 |
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Overnight |
Temperature: 18°C |
| Cloudy with showers likely. Windy. |
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Morning |
Temperature: 18°C |
| Cloudy with sunny periods with a chance of showers. Windy at times. |
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Afternoon |
Temperature: 20°C |
| Cloudy with sunny periods with a chance of showers. Windy. |
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Evening |
Temperature: 18°C |
| A mix of cloudy and clear skies. Windy. |
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| Wednesday, May 20th, 2026 |
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Overnight |
Temperature: 17°C |
| Mostly cloudy with a slight chance of showers. Windy. |
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Morning |
Temperature: 17°C |
| Cloudy with periods of rain. Windy. |
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Afternoon |
Temperature: 22°C |
| Sunny with cloudy periods with a chance of showers or thundershowers. Windy at times. |
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Evening |
Temperature: 18°C |
| Clear with cloudy periods. |
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| Thursday, May 21st, 2026 |
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Overnight |
Temperature: 14°C |
| Clear. Windy at times. |
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Morning |
Temperature: 15°C |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 20°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 14°C |
| Clear. |
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| Friday, May 22nd, 2026 |
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Overnight |
Temperature: 12°C |
| Clear. |
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Morning |
Temperature: 14°C |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 18°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 13°C |
| Clear. Windy at times. |
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