Sinclairville Weather Forecast

    • 63
    • 77

    Mostly Cloudy

    • 66
    • 83

    Rain Showers

    • 52
    • 73

    Mostly Cloudy

    • 52
    • 70

    Mostly Sunny

    • 60
    • 77

    Partly Sunny

    • 56
    • 76

    Slight Chance Rain Showers

Today 8 Sep Chautauqua

Partly sunny. Areas of fog this morning. Highs in the upper 70s. Light Winds.

Tonight 8 Sep Chautauqua

Mostly cloudy and warmer with Lows Ranging from the lower 60s in interior Valleys to the upper 60s along the lake Erie shore. Light Winds, becoming south 5 to 10 Mph.

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Sinclairville Temperature Statistics

September Temperature

Jamestown, Chautauqua County/Jamestown Airport (7.5 miles)

  • Lowest 5 September, 2026

    60.1 °F

  • Average September

    70.4 °F

  • Highest 2 September, 2026

    84 °F

Climate (2021–2026)

Jamestown, Chautauqua County/Jamestown Airport (7.5 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    55.8 °F
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