Union Weather Forecast

    • 53
    • 77

    Increasing Clouds

    • 54
    • 78

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 68
    • 85

    Partly Sunny

    • 60
    • 83

    Partly Sunny

    • 55
    • 75

    Mostly Sunny

    • 60
    • 78

    Partly Sunny

Today 6 Sep Hunterdon

Mostly sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 6 Sep Hunterdon

Partly cloudy. Isolated Showers this evening. Lows in the lower 50s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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Union Temperature Statistics

September Temperature

Somerville, Somerset Airport (14.9 miles)

  • Lowest 2 September, 2026

    66 °F

  • Average September

    73.4 °F

  • Highest 1 September, 2026

    87.1 °F

Climate (2021–2026)

Somerville, Somerset Airport (14.9 miles)

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  • Average Low 2021–2026

    43 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.6 °F
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