South Bristol Weather Forecast

    • 64
    • 77

    Increasing Clouds

    • 67
    • 81

    Rain Showers

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 69

    Mostly Sunny

    • 65
    • 78

    Partly Sunny

    • 60
    • 78

    Chance Rain Showers

    • 59
    • 71

    Chance Rain Showers

Today 8 Sep Ontario

Partly to mostly sunny. Highs Ranging from the lower 70s on the Hilltops to the upper 70s across the lower Elevations. Light Winds.

Tonight 8 Sep Ontario

Mostly cloudy. Lows in the lower 60s. South Winds 10 Mph or less.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Bristol Temperature Statistics

September Temperature

Penn Yan, Penn Yan Airport (18.6 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    70.1 °F

  • Highest 1 September, 2026

    82.9 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (18.6 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    50.3 °F

  • Average High 2021–2026

    59 °F
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