Thompson Reservoir Weather Forecast

    • 43
    • 76

    Mostly Sunny

    • 43
    • 77

    Mostly Cloudy

    • 38
    • 74

    Mostly Sunny

    • 39
    • 72

    Partly Sunny

    • 38
    • 72

    Chance Rain

    • 30
    • 57

    Slight Chance Rain

    • 31
    • 56

    Mostly Cloudy

Today 20 Sep Northern and Eastern Klamath County and Western Lake County

Partly cloudy. Lows in the lower to mid 30s. Highs in the mid 50s to lower 60s.

Tonight 20 Sep Northern and Eastern Klamath County and Western Lake County

Mostly clear early this evening then becoming partly cloudy. Lows in the lower 40s to lower 50s. East Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Thompson Reservoir Temperature Statistics

September Temperature

Klamath Falls International Airport (63.4 miles)

  • Lowest 7 September, 2026

    31.6 °F

  • Average September

    54.7 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Klamath Falls International Airport (63.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    63.3 °F
Get WillyWeather+ to remove ads