Algonquin State Forest Weather Forecast

    • 50
    • 74

    Mostly Cloudy

    • 54
    • 70

    Chance Rain Showers

    • 56
    • 77

    Partly Sunny

    • 44
    • 75

    Mostly Sunny

    • 44
    • 68

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

Today 16 Sep Northern Litchfield

Mostly sunny. Highs in the lower 70s. Northeast Winds around 5 Mph.

Tonight 16 Sep Northern Litchfield

Mostly cloudy. Lows in the lower 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Algonquin State Forest Temperature Statistics

September Temperature

Windsor Locks, Bradley International Airport (19.9 miles)

  • Lowest 8 September, 2025

    46.9 °F

  • Average September

    64.6 °F

  • Highest 6 September, 2025

    84 °F

Climate (2020–Present)

Windsor Locks, Bradley International Airport (19.9 miles)

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  • Average Low 2020–2025

    43.9 °F

  • Average 2020–2025

    53.5 °F

  • Average High 2020–2025

    63.5 °F
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