Grammar Airport Weather Forecast

    • 31
    • 40

    Rain

    • 26
    • 35

    Chance Snow Showers

    • 30
    • 36

    Chance Rain/Snow

    • 36
    • 42

    Chance Rain Showers

    • 17
    • 41

    Chance Snow Showers

    • 15
    • 22

    Mostly Cloudy

    • 20
    • 28

    Mostly Cloudy

Today 10 Jan Ontario

Cloudy. A chance of rain Showers Early, then rain likely late. Highs around 40. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 10 Jan Ontario

Cloudy through the early Overnight, then becoming partly cloudy. A chance of rain Showers late this evening. Lows Ranging from the mid 20s on the Hilltops to the lower 30s across the lower Elevations. Southwest Winds 10 to 20 Mph with Gusts up to 30 Mph, becoming west. Chance of rain 50 percent.

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Grammar Airport Temperature Statistics

January Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 1 January, 2026

    12 °F

  • Average January

    27.3 °F

  • Highest 8 January, 2026

    48.9 °F

Climate (2021–Present)

Penn Yan, Penn Yan Airport (16.2 miles)

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  • Average Low 2021–2026

    41.9 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    59.2 °F
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