Rondout Reservoir Weather Forecast

    • 61
    • 81

    Decreasing Clouds

    • 63
    • 83

    Partly Sunny

    • 66
    • 84

    Chance Thunderstorms

    • 71
    • 93

    Mostly Sunny

    • 71
    • 96

    Mostly Sunny

    • 68
    • 94

    Mostly Sunny

Today 28 Jun Western Ulster

Mostly sunny. Isolated Showers and Thunderstorms this afternoon. Highs in the upper 70s. East Winds around 5 Mph. Chance of rain 20 percent.

Tonight 28 Jun Western Ulster

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 50s. Light and variable Winds.

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Rondout Reservoir Temperature Statistics

June Temperature

Monticello, Sullivan County International Airport (18.6 miles)

  • Lowest 2 June, 2026

    41 °F

  • Average June

    66.1 °F

  • Highest 11 June, 2026

    91 °F

Climate (2021–2026)

Monticello, Sullivan County International Airport (18.6 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    55 °F
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