Blue Lake Weather Forecast
- 55
- 79
Mostly Cloudy
- 50
- 70
Mostly Cloudy
- 48
- 69
Partly Sunny
- 39
- 70
Mostly Sunny
- 46
- 77
Mostly Sunny
- 50
- 77
Slight Chance Rain Showers
- 48
- 69
Slight Chance Rain Showers
Today 18 Sep Lassen-Eastern Plumas-Eastern Sierra Counties
Mostly cloudy. Highs 79 to 89. Light Winds becoming southeast around 10 Mph in the afternoon.
Tonight 18 Sep Lassen-Eastern Plumas-Eastern Sierra Counties
Cloudy. Slight chance of Showers after midnight. Lows 47 to 57. Southwest Winds 10 to 15 Mph.
Blue Lake Temperature Statistics
September Temperature
Alturas (27.3 miles)
Lowest 15 September, 2025
35.1 °FAverage September
66.3 °FHighest 1 September, 2025
91 °F
Climate (2020–Present)
Alturas (27.3 miles)
Average Low 2020–2025
33 °FAverage 2020–2025
49.1 °FAverage High 2020–2025
64.4 °F