Harvard Weather Forecast

    • 54
    • 76

    Mostly Sunny

    • 41
    • 71

    Mostly Sunny

    • 44
    • 70

    Mostly Sunny

    • 49
    • 69

    Partly Sunny

    • 55
    • 74

    Partly Sunny

    • 57
    • 78

    Chance Rain Showers

Today 18 Sep Delaware

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 18 Sep Delaware

Mostly clear. Patchy fog after midnight. Lows in the mid 50s. Northwest Winds around 5 Mph.

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Harvard Temperature Statistics

September Temperature

Monticello, Sullivan County International Airport (27.3 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 (27.3 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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