Mammoth Weather Forecast

    • 40
    • 62

    Increasing Clouds

    • 34
    • 50

    Rain

    • 30
    • 49

    Rain Likely

    • 31
    • 60

    Mostly Sunny

    • 34
    • 65

    Mostly Sunny

    • 37
    • 66

    Mostly Sunny

Today 20 Apr Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy in the Morning, then partly cloudy with a 30 percent chance of rain in the afternoon. Highs in the lower to mid 60s. Breezy. Southeast Winds 10 to 15 Mph increasing to south 20 to 25 Mph in the afternoon.

Tonight 20 Apr Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy. Chance of rain in the Evening, then rain likely after midnight. Snow level 6000 feet after midnight. Lows around 40. South Winds 10 to 20 Mph decreasing to 5 to 10 Mph after midnight. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mammoth Temperature Statistics

April Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 17 April, 2026

    15.1 °F

  • Average April

    43.9 °F

  • Highest 5 April, 2026

    71.7 °F

Climate (2021–Present)

Klamath Falls International Airport (34.2 miles)

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  • Average Low 2021–2026

    34.1 °F

  • Average 2021–2026

    48.9 °F

  • Average High 2021–2026

    63.5 °F
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