Upper Forni Weather Forecast

    • 52
    • 65

    Sunny

    • 53
    • 67

    Sunny

    • 54
    • 69

    Mostly Sunny

    • 52
    • 65

    Chance Rain Showers

    • 50
    • 59

    Chance Rain Showers

    • 48
    • 59

    Chance Rain Showers

Today 15 Sep West Slope Northern Sierra Nevada

Sunny, warmer. Highs 66 to 81 higher Elevations. 78 to 88 lower Elevations. Prevailing east Winds up to 10 Mph shifting to the southwest in the afternoon.

Tonight 15 Sep West Slope Northern Sierra Nevada

Clear. Lows 44 to 59 higher Elevations. 55 to 69 lower Elevations. Light Winds becoming east up to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Forni Temperature Statistics

September Temperature

South Lake Tahoe, Lake Tahoe Airport (10.6 miles)

  • Lowest 11 September, 2025

    33.1 °F

  • Average September

    57.3 °F

  • Highest 1 September, 2025

    81 °F

Climate (2020–Present)

South Lake Tahoe, Lake Tahoe Airport (10.6 miles)

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  • Average Low 2020–2025

    31.2 °F

  • Average 2020–2025

    45.9 °F

  • Average High 2020–2025

    59.7 °F
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