Plattekill State Forest Weather Forecast

    • 51
    • 68

    Mostly Cloudy

    • 53
    • 74

    Becoming Sunny

    • 37
    • 68

    Partly Sunny

    • 41
    • 66

    Mostly Sunny

    • 48
    • 67

    Partly Sunny

    • 52
    • 72

    Partly Sunny

    • 54
    • 76

    Slight Chance Rain Showers

Today 17 Sep Delaware

Mostly cloudy with a 20 percent chance of Showers. Highs in the lower 70s. Southeast Winds around 5 Mph.

Tonight 17 Sep Delaware

Partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Southeast Winds around 5 Mph this Evening, becoming light and variable.

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Plattekill State Forest Temperature Statistics

September Temperature

Monticello, Sullivan County International Airport (40.4 miles)

  • Lowest 2 September, 2025

    48.2 °F

  • Average September

    48.2 °F

  • Highest 2 September, 2025

    48.2 °F

Climate (2020–Present)

Monticello, Sullivan County International Airport (40.4 miles)

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  • Average Low 2020–2025

    37 °F

  • Average 2020–2025

    46.2 °F

  • Average High 2020–2025

    55.6 °F
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