Belfast Weather Forecast

    • 41
    • 78

    Mostly Sunny

    • 40
    • 75

    Mostly Sunny

    • 45
    • 80

    Sunny

    • 48
    • 83

    Mostly Sunny

    • 47
    • 85

    Partly Sunny

    • 47
    • 86

    Mostly Sunny

Today 16 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Mostly sunny. Slight chance of Showers in the afternoon. Highs 69 to 79. Light Winds becoming south around 10 Mph in the afternoon.

Tonight 16 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Clear. Lows 36 to 46. Southwest Winds around 10 Mph in the evening becoming light.

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Belfast Temperature Statistics

September Temperature

Reno/Stead (61.5 miles)

  • Lowest 7 September, 2026

    37.4 °F

  • Average September

    64.2 °F

  • Highest 9 September, 2026

    87.8 °F

Climate (2021–2026)

Reno/Stead (61.5 miles)

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  • Average Low 2021–2026

    37.2 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    64.4 °F
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