Crater Lake Weather Forecast

    • 43
    • 63

    Increasing Clouds

    • 42
    • 59

    Chance Rain Showers

    • 41
    • 53

    Chance Rain Showers

    • 41
    • 55

    Chance Rain Showers

    • 41
    • 55

    Chance Rain Showers

    • 44
    • 61

    Mostly Sunny

Today 7 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Sunny in the morning then becoming partly cloudy. Highs 73 to 83. Southwest Winds 10 to 15 Mph.

Tonight 7 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Mostly cloudy in the evening then becoming partly cloudy. Lows 38 to 48. West Winds around 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crater Lake Temperature Statistics

September Temperature

Alturas (64 miles)

  • Lowest 1 September, 2025

    50 °F

  • Average September

    75.5 °F

  • Highest 1 September, 2025

    91 °F

Climate (2020–Present)

Alturas (64 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    64.5 °F
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