Seneca Weather Forecast

    • 26
    • 66

    Decreasing Clouds

    • 43
    • 58

    Partly Sunny

    • 38
    • 77

    Partly Sunny

    • 43
    • 72

    Mostly Cloudy

    • 45
    • 72

    Mostly Sunny

    • 44
    • 72

    Partly Sunny

Today 20 Dec Union County

Partly cloudy. Highs in the upper 60s. Temperature falling into the lower 50s this afternoon. North Winds around 15 Mph, becoming east this afternoon.

Tonight 20 Dec Union County

Much Colder. Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 20s. Southeast Winds around 15 Mph in the evening.

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Seneca Temperature Statistics

December Temperature

Clayton Municipal Airpark (12.4 miles)

  • Lowest 1 December, 2025

    19 °F

  • Average December

    43 °F

  • Highest 11 December, 2025

    80.1 °F

Climate (2020–Present)

Clayton Municipal Airpark (12.4 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    55.8 °F

  • Average High 2020–2025

    69.6 °F
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