Johnsville Weather Forecast

    • 40
    • 52

    Slight Chance Rain Showers

    • 44
    • 60

    Partly Sunny

    • 39
    • 58

    Mostly Sunny

    • 45
    • 66

    Mostly Sunny

    • 47
    • 68

    Partly Sunny

    • 52
    • 67

    Chance Rain Showers

    • 48
    • 67

    Chance Rain Showers

Today 4 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Mostly cloudy in the morning then clearing. Chance of Showers. Highs 61 to 71. Southwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 4 Sep Lassen-Eastern Plumas-Eastern Sierra Counties

Clear. Areas of fog after midnight. Lows 30 to 40. West Winds 10 to 15 Mph with Gusts up to 30 Mph in the evening becoming light.

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Johnsville Temperature Statistics

September Temperature

Emigrant Gap, Blue Canyon Nyack Airport (32.9 miles)

  • Lowest 1 September, 2026

    43.6 °F

  • Average September

    51.4 °F

  • Highest 1 September, 2026

    61.6 °F

Climate (2021–2026)

Emigrant Gap, Blue Canyon Nyack Airport (32.9 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    60.5 °F
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