Grammar Airport Weather Forecast

    • 14
    • 41

    Snow Likely

    • 12
    • 16

    Chance Snow Showers

    • 25
    • 29

    Mostly Cloudy

    • 18
    • 36

    Slight Chance Snow

    • 14
    • 25

    Slight Chance Snow Showers

    • 11
    • 22

    Chance Snow Showers

Today 14 Jan Ontario

Cloudy. A chance of rain and snow Showers in the afternoon. Highs Ranging from the mid 30s on the Hilltops to the lower 40s across the lower Elevations. Southwest Winds 10 to 15 Mph, becoming west 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 14 Jan Ontario

Snow likely. Additional accumulation 2 to 3 Inches possible. Much Colder with Lows Ranging from 5 to 10 above on the Hilltops to 10 to 15 across the lower Elevations. West Winds 10 to 20 Mph with Gusts up to 30 Mph, becoming northwest. Chance of snow 70 percent.

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  • Temperature Real-Time

Grammar Airport Temperature Statistics

January Temperature

Penn Yan, Penn Yan Airport (16.2 miles)

  • Lowest 1 January, 2026

    12 °F

  • Average January

    30.1 °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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