Grammar Airport Weather Forecast

    • 36
    • 58

    Mostly Sunny

    • 35
    • 60

    Partly Sunny

    • 30
    • 54

    Mostly Sunny

    • 36
    • 60

    Sunny

    • 45
    • 65

    Partly Sunny

    • 44
    • 63

    Mostly Cloudy

Today 21 Oct Ontario

Sunny. Highs in the upper 50s. Light north Winds.

Tonight 21 Oct Ontario

Mainly clear in the Evening, then becoming partly cloudy. Lows in the mid 30s. Light west Winds.

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Grammar Airport Temperature Statistics

October Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 17 October, 2026

    32 °F

  • Average October

    55.3 °F

  • Highest 13 October, 2026

    84 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (16.2 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    50.2 °F

  • Average High 2021–2026

    58.9 °F
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