Alton Weather Forecast
- 65
- 84
Rain Showers Likely
- 63
- 84
Chance Thunderstorms
- 62
- 86
Mostly Sunny
- 61
- 86
Slight Chance Thunderstorms
- 60
- 85
Mostly Sunny
- 63
- 85
Partly Sunny
Today 19 Aug Crawford
Partly sunny. Slight chance of Showers in the Morning, then slight chance of Thunderstorms in the afternoon. Highs in the lower 80s. Southwest Winds up to 5 Mph. Chance of precipitation 20 percent.
Tonight 19 Aug Crawford
Mostly cloudy. Chance of Thunderstorms in the Evening, then Showers likely and chance of Thunderstorms after midnight. Lows in the mid 60s. Light Winds. Chance of precipitation 70 percent.
Alton Temperature Statistics
August Temperature
Fort Knox (28.6 miles)
Lowest 3 August, 2026
64.9 °FAverage August
78.5 °FHighest 16 August, 2026
94.6 °F
Climate (2021–2026)
Fort Knox (28.6 miles)
Average Low 2021–2026
48.1 °FAverage 2021–2026
57.6 °FAverage High 2021–2026
67.5 °F