Union Weather Forecast

    • 21
    • 32

    Increasing Clouds

    • 22
    • 32

    Snow Showers Likely

    • 14
    • 29

    Partly Sunny

    • 19
    • 32

    Mostly Cloudy

    • 17
    • 33

    Partly Sunny

    • 20
    • 33

    Partly Sunny

    • 23
    • 36

    Chance Snow

Today 30 Dec Hunterdon

Partly sunny. Much Colder with Highs in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 45 Mph.

Tonight 30 Dec Hunterdon

Mostly cloudy. A slight chance of snow Showers after midnight. Cold with Lows in the lower 20s. West Winds 10 to 15 Mph. Gusts up to 30 Mph this evening. Chance of snow 20 percent.

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Union Temperature Statistics

December Temperature

Somerville, Somerset Airport (14.9 miles)

  • Lowest 9 December, 2025

    7 °F

  • Average December

    30.2 °F

  • Highest 19 December, 2025

    57 °F

Climate (2020–Present)

Somerville, Somerset Airport (14.9 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    65.7 °F
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