Mammoth Weather Forecast

    • 58
    • 82

    Rain Showers Likely

    • 51
    • 72

    Partly Sunny

    • 60
    • 81

    Mostly Sunny

    • 65
    • 85

    Partly Sunny

    • 65
    • 85

    Chance Rain Showers

    • 60
    • 80

    Chance Rain Showers

Today 13 Sep Westmoreland

Patchy fog in the morning. Considerable cloudiness with a slight chance of Showers in the Morning, then partly sunny in the afternoon. Humid with Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 13 Sep Westmoreland

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Humid with Lows in the upper 50s. West Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 70 percent.

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Mammoth Temperature Statistics

September Temperature

Latrobe / Westmorland (6.2 miles)

  • Lowest 7 September, 2026

    53.6 °F

  • Average September

    70.9 °F

  • Highest 2 September, 2026

    91.4 °F

Climate (2021–2026)

Latrobe / Westmorland (6.2 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    62.8 °F
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