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 Alton Weather Forecast Summary |
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Today
May 24th
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Monday
May 25th
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Tuesday
May 26th
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Wednesday
May 27th
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Thursday
May 28th
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Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
79°F
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84°F
62°F |
84°F
65°F |
83°F
64°F |
84°F
66°F |
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| Alton Detailed Weather Forecast |
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| Sunday, May 24th, 2026 |
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Evening |
Temperature: 68°F |
| A mix of clear and cloudy skies with a chance of showers. Slight chance of a thunderstorm. Windy. |
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| Monday, May 25th, 2026 |
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Overnight |
Temperature: 62°F |
| Clear with a chance of showers. Windy at times. |
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Morning |
Temperature: 64°F |
| A mix of cloud and sun. Chance of a thunderstorm. Windy at times. |
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Afternoon |
Temperature: 82°F |
| Sunny with cloudy periods. Chance of a thunderstorm. Windy. |
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Evening |
Temperature: 74°F |
| A mix of clear and cloudy skies with a chance of showers or thundershowers. Windy at times. |
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| Tuesday, May 26th, 2026 |
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Overnight |
Temperature: 67°F |
| Clear with cloudy periods with a chance of showers. Slight chance of a thunderstorm. Windy at times. |
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Morning |
Temperature: 69°F |
| Sunny with a slight chance of showers or thundershowers. Windy at times. |
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Afternoon |
Temperature: 83°F |
| Sunny. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 75°F |
| Clear. Chance of a thunderstorm. Windy at times. |
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| Wednesday, May 27th, 2026 |
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Overnight |
Temperature: 65°F |
| Clear. |
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Morning |
Temperature: 69°F |
| Sunny. Slight chance of a thunderstorm. |
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Afternoon |
Temperature: 82°F |
| Sunny. Slight chance of a thunderstorm. |
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Evening |
Temperature: 76°F |
| Mostly clear. Chance of a thunderstorm. |
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| Thursday, May 28th, 2026 |
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Overnight |
Temperature: 67°F |
| Mostly clear. Slight chance of a thunderstorm. |
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Morning |
Temperature: 71°F |
| Mostly sunny. Slight chance of a thunderstorm. Windy at times. |
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Afternoon |
Temperature: 83°F |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 76°F |
| A mix of cloudy and clear skies with a slight chance of showers or thundershowers. Windy at times. |
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| Friday, May 29th, 2026 |
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Overnight |
Temperature: 67°F |
| Mostly cloudy. |
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Morning |
Temperature: 68°F |
| Mostly cloudy with a chance of showers. |
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Afternoon |
Temperature: 69°F |
| Cloudy with a slight chance of showers. Windy at times. |
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Evening |
Temperature: 64°F |
| Cloudy. |
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| Saturday, May 30th, 2026 |
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Overnight |
Temperature: 62°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 62°F |
| Cloudy with a chance of showers. |
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Afternoon |
Temperature: 65°F |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 66°F |
| A mix of cloudy and clear skies with a chance of showers. Slight chance of a thunderstorm. |
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| Sunday, May 31st, 2026 |
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Overnight |
Temperature: 62°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 64°F |
| Mostly cloudy. Windy at times. |
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Afternoon |
Temperature: 72°F |
| Mostly cloudy with a slight chance of showers. Windy at times. |
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Evening |
Temperature: 66°F |
| Mostly clear with a slight chance of showers. Windy at times. |
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| Monday, June 1st, 2026 |
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Overnight |
Temperature: 57°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 61°F |
| A mix of cloud and sun. |
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Afternoon |
Temperature: 74°F |
| A mix of sun and cloud. |
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Evening |
Temperature: 69°F |
| Clear with cloudy periods. |
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