Grass Lake Weather Forecast

    • 36
    • 48

    Mostly Sunny

    • 32
    • 46

    Partly Sunny

    • 34
    • 48

    Partly Sunny

    • 37
    • 49

    Partly Sunny

    • 39
    • 51

    Partly Sunny

    • 38
    • 52

    Partly Sunny

Today 5 Dec Lassen-Eastern Plumas-Eastern Sierra Counties

Partly cloudy. Slight chance of rain in the afternoon. Highs 52 to 57. Light Winds.

Tonight 5 Dec Lassen-Eastern Plumas-Eastern Sierra Counties

Partly cloudy with a slight chance of rain. Lows 28 to 38. Light Winds becoming west around 10 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

December Temperature

Emigrant Gap, Blue Canyon Nyack Airport (31.1 miles)

  • Lowest 3 December, 2025

    34 °F

  • Average December

    42.6 °F

  • Highest 1 December, 2025

    52 °F

Climate (2020–Present)

Emigrant Gap, Blue Canyon Nyack Airport (31.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.5 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    60.3 °F
Get WillyWeather+ to remove ads