Mammoth Weather Forecast

    • 23
    • 36

    Mostly Cloudy

    • 28
    • 39

    Breezy

    • 35
    • 44

    Chance Snow

    • 38
    • 50

    Rain

    • 30
    • 48

    Rain

    • 30
    • 51

    Chance Rain/Snow

    • 32
    • 54

    Chance Rain/Snow

Today 20 Feb Northeast Siskiyou and Northwest Modoc Counties

Partly cloudy early this afternoon then becoming mostly cloudy. Highs in the mid 30s. South Winds 10 to 15 Mph.

Tonight 20 Feb Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy. Lows in the lower to mid 20s. South Winds 10 to 20 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mammoth Temperature Statistics

February Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 18 February, 2026

    10.9 °F

  • Average February

    37.1 °F

  • Highest 5 February, 2026

    63.6 °F

Climate (2021–Present)

Klamath Falls International Airport (34.2 miles)

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

  • Average Low 2021–2026

    34 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    63.3 °F
Get WillyWeather+ to remove ads