Alton Weather Forecast

    • 56
    • 75

    Rain Showers

    • 60
    • 74

    Chance Rain Showers

    • 66
    • 78

    Rain Showers

    • 66
    • 82

    Rain Showers Likely

    • 67
    • 82

    Rain Showers Likely

    • 67
    • 82

    Rain Showers Likely

Today 20 May Crawford

Cooler. Showers likely and chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall early in the morning. Some Thunderstorms may produce heavy rainfall in the late morning and early afternoon. Near steady temperature in the upper 60s. North Winds up to 5 Mph. Chance of precipitation 70 percent.

Tonight 20 May Crawford

Cooler. Mostly cloudy. A 50 percent chance of rain Showers in the evening. Lows in the mid 50s. Northeast Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Temperature Statistics

May Temperature

Fort Knox (28.6 miles)

  • Lowest 2 May, 2026

    37.6 °F

  • Average May

    62.2 °F

  • Highest 18 May, 2026

    88.7 °F

Climate (2021–Present)

Fort Knox (28.6 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    67.4 °F
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