Lewiston Weather Forecast

    • 57
    • 90

    Slight Chance Thunderstorms

    • 55
    • 80

    Chance Rain

    • 52
    • 83

    Slight Chance Rain Showers

    • 55
    • 85

    Sunny

    • 56
    • 90

    Mostly Sunny

    • 54
    • 86

    Chance Rain

Today 18 Sep Northern Trinity

Mostly sunny early in the morning then becoming mostly cloudy. Highs 86 to 101.

Tonight 18 Sep Northern Trinity

Mostly cloudy. Slight chance of Thunderstorms in the evening. Slight chance of rain Showers through the night. Lows 52 to 62.

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Lewiston Temperature Statistics

September Temperature

Weaverville (6.2 miles)

  • Lowest 15 September, 2025

    46.4 °F

  • Average September

    70.3 °F

  • Highest 1 September, 2025

    96.8 °F

Climate (2023–Present)

Weaverville (6.2 miles)

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  • Average Low 2023–2025

    43 °F

  • Average 2023–2025

    57.2 °F

  • Average High 2023–2025

    71.2 °F
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