Grammar Airport Weather Forecast

    • 7
    • 12

    Chance Snow Showers

    • 12
    • 16

    Snow

    • 6
    • 18

    Snow Showers Likely

    • 8
    • 16

    Slight Chance Snow Showers

    • 5
    • 17

    Mostly Cloudy

    • 6
    • 14

    Mostly Cloudy

Today 24 Jan Ontario

Partly sunny. A chance of snow Showers in the morning. Cold with Highs Ranging from 5 to 10 above on the Hilltops to 10 to 15 across the lower Elevations. Light west Winds. Chance of snow 50 percent.

Tonight 24 Jan Ontario

Lake effect snow Showers. Accumulation an inch or less. Cold with near steady Temperatures Ranging from between zero and 5 below on the Hilltops to between zero and 5 above across the lower Elevations. Northwest Winds 10 to 15 Mph, becoming west 5 to 10 Mph. Chance of snow 90 percent. Wind chill Values as low as 20 below.

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Grammar Airport Temperature Statistics

January Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 20 January, 2026

    7 °F

  • Average January

    28 °F

  • Highest 9 January, 2026

    50 °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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