Union Weather Forecast

    • 19
    • 36

    Slight Chance Rain/Snow

    • 25
    • 33

    Partly Sunny

    • 23
    • 40

    Chance Snow

    • 15
    • 30

    Slight Chance Snow

    • 12
    • 29

    Partly Sunny

    • 11
    • 24

    Partly Sunny

Today 15 Jan Hunterdon

Mostly cloudy. Much cooler with Highs in the mid 30s. Temperature falling into the upper 20s in the afternoon. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 15 Jan Hunterdon

Rain likely. Near steady temperature in the upper 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 60 percent.

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Union Temperature Statistics

January Temperature

Somerville, Somerset Airport (14.9 miles)

  • Lowest 3 January, 2026

    12 °F

  • Average January

    33.3 °F

  • Highest 8 January, 2026

    52 °F

Climate (2021–Present)

Somerville, Somerset Airport (14.9 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.7 °F
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