 |
 Current Alton Weather Conditions |
Updated June 17th at 12:50 pm |
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| Overcast |
| Temperature: | 86°F |
Dew Point: | 64°F |
| Barometer: | 29.44 inHg |
Wind: | N 43 Mph |
| Humidity: | 48.6% |
Visibility: | 0M |
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| Alton Weather Forecast Summary |
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Today
Jun 17th
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Thursday
Jun 18th
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Friday
Jun 19th
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Saturday
Jun 20th
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Sunday
Jun 21st
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Thundershowers |
Mix of Sun and Cloud |
Mostly Sunny |
Mix of Cloud and Sun |
Rain |
91°F
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70°F
61°F |
78°F
59°F |
81°F
64°F |
70°F
59°F |
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| Alton Detailed Weather Forecast |
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| Wednesday, June 17th, 2026 |
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Afternoon |
Temperature: 89°F |
| Sunny with cloudy periods. Chance of a thunderstorm. Wind 20 to 30 mph. |
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Evening |
Temperature: 79°F |
| A mix of cloudy and clear skies with showers likely. Chance of a thunderstorm. Wind 20 to 30 mph. |
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| Thursday, June 18th, 2026 |
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Overnight |
Temperature: 63°F |
| Clear with a chance of showers. Windy at times. |
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Morning |
Temperature: 66°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 68°F |
| Mostly cloudy. Windy at times. |
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Evening |
Temperature: 66°F |
| Clear. |
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| Friday, June 19th, 2026 |
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Overnight |
Temperature: 59°F |
| Clear. |
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Morning |
Temperature: 66°F |
| Mostly sunny. |
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Afternoon |
Temperature: 77°F |
| Mostly sunny. |
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Evening |
Temperature: 70°F |
| Mostly clear. |
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| Saturday, June 20th, 2026 |
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Overnight |
Temperature: 64°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 67°F |
| Cloudy with sunny periods. |
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Afternoon |
Temperature: 80°F |
| Sunny with cloudy periods. Windy at times. |
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Evening |
Temperature: 74°F |
| A mix of cloudy and clear skies. |
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| Sunday, June 21st, 2026 |
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Overnight |
Temperature: 67°F |
| Mostly cloudy with a few showers. Windy at times. |
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Morning |
Temperature: 68°F |
| Mostly cloudy with periods of rain. Windy at times. |
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Afternoon |
Temperature: 64°F |
| Mostly cloudy with showers. Wind 20 to 30 mph. |
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Evening |
Temperature: 63°F |
| Clear. Windy at times. |
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| Monday, June 22nd, 2026 |
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Overnight |
Temperature: 53°F |
| Clear. |
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Morning |
Temperature: 58°F |
| Mostly sunny. |
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Afternoon |
Temperature: 71°F |
| Mostly sunny. |
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Evening |
Temperature: 65°F |
| Mostly clear. |
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| Tuesday, June 23rd, 2026 |
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Overnight |
Temperature: 57°F |
| Clear. |
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Morning |
Temperature: 63°F |
| Mostly sunny. |
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Afternoon |
Temperature: 74°F |
| Mostly sunny. |
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Evening |
Temperature: 70°F |
| A mix of cloudy and clear skies. |
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| Wednesday, June 24th, 2026 |
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Overnight |
Temperature: 66°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 68°F |
| A mix of cloud and sun. |
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Afternoon |
Temperature: 77°F |
| Sunny with cloudy periods. |
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Evening |
Temperature: 72°F |
| Clear. Slight chance of a thunderstorm. |
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| Thursday, June 25th, 2026 |
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Overnight |
Temperature: 64°F |
| Clear. |
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Morning |
Temperature: 69°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 81°F |
| Sunny. Slight chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 76°F |
| Mostly clear with a chance of showers or thundershowers. Windy at times. |
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