Union Weather Forecast

    • 64
    • 89

    Increasing Clouds

    • 68
    • 92

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 52
    • 90

    Rain Showers

    • 49
    • 70

    Mostly Cloudy

    • 49
    • 66

    Chance Rain Showers

    • 53
    • 68

    Chance Rain Showers

Today 17 May Hunterdon

Sunny, hot with Highs in the upper 80s. West Winds 5 to 10 Mph.

Tonight 17 May Hunterdon

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 60s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

May Temperature

Somerville, Somerset Airport (14.9 miles)

  • Lowest 4 May, 2026

    33.1 °F

  • Average May

    56.5 °F

  • Highest 5 May, 2026

    82.9 °F

Climate (2021–Present)

Somerville, Somerset Airport (14.9 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    65.7 °F
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