Union Weather Forecast

    • 49
    • 74

    Chance Rain Showers

    • 49
    • 74

    Mostly Sunny

    • 52
    • 75

    Mostly Cloudy

    • 51
    • 73

    Partly Sunny

    • 51
    • 81

    Mostly Sunny

    • 47
    • 73

    Mostly Sunny

Today 7 Sep Hunterdon

Cloudy with Showers likely in the Morning, then partly sunny in the afternoon. Not as warm with Highs in the lower 70s. Northwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 7 Sep Hunterdon

Mostly clear. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.

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Union Temperature Statistics

September Temperature

Somerville, Somerset Airport (14.9 miles)

  • Lowest 3 September, 2025

    50 °F

  • Average September

    66.4 °F

  • Highest 4 September, 2025

    84.9 °F

Climate (2020–Present)

Somerville, Somerset Airport (14.9 miles)

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  • Average Low 2020–2025

    43.3 °F

  • Average 2020–2025

    54.4 °F

  • Average High 2020–2025

    65.8 °F
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