Waterloo Weather Forecast

    • 59
    • 82

    Increasing Clouds

    • 43
    • 68

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 61
    • 79

    Partly Sunny

    • 62
    • 82

    Chance Rain Showers

    • 60
    • 81

    Chance Rain Showers

Today 18 Sep Seneca

Mostly sunny. Highs in the lower 80s. Southwest Winds around 5 Mph, becoming northwest in the afternoon.

Tonight 18 Sep Seneca

Partly cloudy. Lows in the mid 50s. South Winds around 5 Mph.

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Waterloo Temperature Statistics

September Temperature

Penn Yan, Penn Yan Airport (19.9 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    62.2 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Penn Yan, Penn Yan Airport (19.9 miles)

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  • Average Low 2020–2025

    42.1 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.3 °F
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