High Mountain Park Preserve Weather Forecast

    • 65
    • 80

    Chance Rain Showers

    • 55
    • 78

    Partly Sunny

    • 57
    • 69

    Rain Showers Likely

    • 55
    • 67

    Rain Showers

    • 52
    • 65

    Chance Rain Showers

    • 50
    • 63

    Chance Rain Showers

Today 17 Sep Eastern Passaic

Mostly cloudy. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 17 Sep Eastern Passaic

Mostly cloudy with a 30 percent chance of Showers. Humid with Lows in the upper 60s. South Winds around 5 Mph, becoming west after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

High Mountain Park Preserve Temperature Statistics

September Temperature

Caldwell, Essex County Airport (7.5 miles)

  • Lowest 7 September, 2026

    55 °F

  • Average September

    71.4 °F

  • Highest 3 September, 2026

    86 °F

Climate (2021–2026)

Caldwell, Essex County Airport (7.5 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    55.9 °F

  • Average High 2021–2026

    65.1 °F
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