Gem Lake Weather Forecast

    • 59
    • 77

    Becoming Sunny

    • 63
    • 83

    Partly Sunny

    • 66
    • 85

    Rain Showers Likely

    • 64
    • 77

    Rain Showers

    • 60
    • 78

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 67
    • 86

    Chance Rain Showers

Today 30 Jul Seneca

Partly sunny. Highs in the mid 70s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 30 Jul Seneca

Mostly clear. Lows in the upper 50s. Northwest Winds 5 to 10 Mph, becoming southwest after midnight.

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Gem Lake Temperature Statistics

July Temperature

Penn Yan, Penn Yan Airport (18 miles)

  • Lowest 23 July, 2026

    52 °F

  • Average July

    72.8 °F

  • Highest 1 July, 2026

    95 °F

Climate (2021–2026)

Penn Yan, Penn Yan Airport (18 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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