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    Increasing Clouds

    • 50
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    Rain Showers

    • 49
    • 61

    Rain Showers

    • 44
    • 62

    Chance Rain Showers

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    Chance Rain Showers

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    Chance Rain Showers

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    Chance Rain Showers

Today 18 Sep Delaware

Partly sunny. Highs in the mid 60s.

Tonight 18 Sep Delaware

Partly cloudy. Lows in the lower 40s. North Winds around 5 Mph.

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More Park Temperature Statistics

September Temperature

Monticello, Sullivan County International Airport (36.7 miles)

  • Lowest 15 September, 2026

    42.1 °F

  • Average September

    64.6 °F

  • Highest 3 September, 2026

    81 °F

Climate (2021–2026)

Monticello, Sullivan County International Airport (36.7 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    45.9 °F

  • Average High 2021–2026

    55.2 °F
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