South Bristol Weather Forecast

    • 33
    • 53

    Becoming Sunny

    • 46
    • 59

    Rain Showers

    • 45
    • 63

    Rain Showers

    • 44
    • 54

    Chance Rain Showers

    • 49
    • 63

    Slight Chance Rain Showers

    • 51
    • 70

    Slight Chance Thunderstorms

Today 11 May Ontario

Partly sunny. A chance of Showers this afternoon. Cool with Highs Ranging from the upper 40s on the Hilltops to the lower 50s across the lower Elevations. Light Winds, becoming northwest around 10 Mph. Chance of rain 30 percent.

Tonight 11 May Ontario

Mainly clear with widespread frost developing. Cold with Lows in the mid 30s. Northwest Winds 10 Mph or less.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Bristol Temperature Statistics

May Temperature

Penn Yan, Penn Yan Airport (18.6 miles)

  • Lowest 7 May, 2026

    32 °F

  • Average May

    49.4 °F

  • Highest 4 May, 2026

    73 °F

Climate (2021–Present)

Penn Yan, Penn Yan Airport (18.6 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.4 °F

  • Average High 2021–2026

    59.1 °F
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