Collinsville Weather Forecast

    • 16
    • 31

    Increasing Clouds

    • 20
    • 33

    Mostly Sunny

    • 38
    • 53

    Mostly Cloudy

    • 40
    • 56

    Mostly Cloudy

    • 31
    • 52

    Chance Rain

    • 41
    • 61

    Mostly Sunny

Today 22 Feb Madison

Mostly sunny and Breezy, cooler with Highs in the lower 30s. Northwest Winds 15 to 25 Mph with Gusts up to 35 Mph.

Tonight 22 Feb Madison

Mostly clear in the Evening, then becoming mostly cloudy. Lows around 15. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Wind chill Values as low as 1 above.

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Collinsville Temperature Statistics

February Temperature

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

  • Lowest 1 February, 2026

    4.5 °F

  • Average February

    39.9 °F

  • Highest 18 February, 2026

    74.8 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (10.6 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    67.8 °F
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