Belfast Weather Forecast

    • 42
    • 56

    Rain Likely

    • 37
    • 55

    Rain

    • 38
    • 56

    Rain

    • 33
    • 49

    Rain

    • 28
    • 44

    Rain/Snow

    • 18
    • 42

    Rain/Snow Likely

    • 17
    • 39

    Slight Chance Snow

Today 21 Dec Lassen-Eastern Plumas-Eastern Sierra Counties

Rain. Highs 46 to 56. Southwest Winds 20 to 30 Mph with Gusts up to 55 Mph.

Tonight 21 Dec Lassen-Eastern Plumas-Eastern Sierra Counties

Heavy Showers and slight chance of Thunderstorms in the Evening, then rain after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows 33 to 43. Southwest Winds 20 to 30 Mph decreasing to 10 to 15 Mph after midnight. Gusts up to 50 Mph.

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Belfast Temperature Statistics

December Temperature

Reno/Stead (61.5 miles)

  • Lowest 4 December, 2025

    17.6 °F

  • Average December

    43 °F

  • Highest 9 December, 2025

    64.4 °F

Climate (2020–Present)

Reno/Stead (61.5 miles)

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  • Average Low 2020–2025

    36.9 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    64.3 °F
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