Collinsville Weather Forecast

    • 58
    • 81

    Sunny

    • 47
    • 78

    Mostly Sunny

    • 45
    • 70

    Mostly Sunny

    • 47
    • 71

    Partly Sunny

    • 57
    • 75

    Partly Sunny

    • 60
    • 82

    Slight Chance Rain Showers

    • 57
    • 79

    Slight Chance Rain Showers

Today 18 Sep Hartford

Sunny. Highs in the lower 80s. West Winds around 5 Mph.

Tonight 18 Sep Hartford

Clear. Lows in the upper 50s. West Winds around 5 Mph.

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Collinsville Temperature Statistics

September Temperature

Hartford, Hartford-Brainard Airport (14.3 miles)

  • Lowest 8 September, 2025

    46.9 °F

  • Average September

    65.5 °F

  • Highest 6 September, 2025

    84 °F

Climate (2020–Present)

Hartford, Hartford-Brainard Airport (14.3 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    63.6 °F
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