Mumbo Lake Weather Forecast

    • 51
    • 72

    Mostly Cloudy

    • 50
    • 64

    Chance Rain

    • 48
    • 64

    Chance Rain Showers

    • 48
    • 65

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

    • 49
    • 68

    Chance Rain

Today 18 Sep Northern Trinity

Mostly sunny early in the morning then becoming mostly cloudy. Highs 86 to 101.

Tonight 18 Sep Northern Trinity

Mostly cloudy. Slight chance of rain Showers and isolated Thunderstorms in the Evening, then slight chance of rain overnight. Lows 53 to 63.

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Mumbo Lake Temperature Statistics

September Temperature

Mount Shasta (13 miles)

  • Lowest 16 September, 2025

    43 °F

  • Average September

    63.1 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Mount Shasta (13 miles)

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  • Average Low 2020–2025

    39.5 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    65.7 °F
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