South Mountain Reservation Weather Forecast

    • 68
    • 92

    Partly Sunny

    • 68
    • 93

    Chance Thunderstorms

    • 64
    • 87

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 70
    • 91

    Slight Chance Rain Showers

    • 71
    • 91

    Chance Rain Showers

Today 5 Jun Western Essex

Sunny. Highs in the lower 90s. West Winds 5 to 10 Mph.

Tonight 5 Jun Western Essex

Mostly clear. Lows in the upper 60s. Southwest Winds around 5 Mph.

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  • Temperature Real-Time

South Mountain Reservation Temperature Statistics

June Temperature

Morristown Municipal (7.5 miles)

  • Lowest 2 June, 2026

    41 °F

  • Average June

    63.7 °F

  • Highest 3 June, 2026

    84.2 °F

Climate (2021–Present)

Morristown Municipal (7.5 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    64 °F
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