Collinsville Weather Forecast

    • 36
    • 67

    Rain Showers

    • 30
    • 49

    Mostly Sunny

    • 25
    • 46

    Mostly Sunny

    • 21
    • 39

    Mostly Sunny

    • 22
    • 38

    Mostly Sunny

    • 38
    • 49

    Mostly Cloudy

Today 19 Feb Madison

Mostly cloudy with Showers and Thunderstorms likely this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Highs in the upper 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 60 percent.

Tonight 19 Feb Madison

Mostly clear in the Evening, then becoming partly cloudy. Much cooler with Lows in the mid 30s. West Winds 15 to 20 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Collinsville Temperature Statistics

February Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

  • Lowest 1 February, 2026

    4.5 °F

  • Average February

    36.5 °F

  • Highest 10 February, 2026

    72.3 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    67.8 °F
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