Grassy Lake Weather Forecast

    • 43
    • 49

    Chance Rain Showers

    • 41
    • 46

    Rain Showers

    • 39
    • 44

    Rain Showers

    • 37
    • 42

    Rain Showers

    • 37
    • 42

    Rain Showers

    • 35
    • 39

    Rain/Snow

Today 15 Dec Western Plumas County/Lassen Park

Mostly cloudy. Highs 48 to 63. Light Winds.

Tonight 15 Dec Western Plumas County/Lassen Park

Mostly clear in the evening then becoming mostly cloudy. A slight chance of rain Showers. Lows 36 to 51. Light Winds.

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  • Temperature Real-Time

Grassy Lake Temperature Statistics

December Temperature

Chico Municipal Airport (29.2 miles)

  • Lowest 3 December, 2025

    35.6 °F

  • Average December

    41.6 °F

  • Highest 3 December, 2025

    60.8 °F

Climate (2020–Present)

Chico Municipal Airport (29.2 miles)

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  • Average Low 2020–2025

    52.4 °F

  • Average 2020–2025

    61.1 °F

  • Average High 2020–2025

    75 °F
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