Mammoth Weather Forecast
- 38
- 76
Rain Likely
- 36
- 56
Chance Rain
- 39
- 57
Rain Likely
- 43
- 68
Rain Showers Likely
- 40
- 68
Slight Chance Rain
- 40
- 71
Mostly Sunny
Today 25 May Northeast Siskiyou and Northwest Modoc Counties
Partly cloudy then becoming mostly cloudy late this morning then becoming partly cloudy. Patchy blowing dust in the late morning and afternoon. Slight chance of rain late this afternoon. Highs in the mid 70s. Breezy. South Winds 5 to 10 Mph with Gusts to around 30 Mph increasing to southwest 15 to 25 Mph with Gusts to around 40 Mph in the late morning and afternoon.
Tonight 25 May Northeast Siskiyou and Northwest Modoc Counties
Patchy blowing dust in the evening. Mostly cloudy with a 30 percent chance of rain. Snow level 4500 feet after midnight. Lows in the mid 30s to lower 40s. Breezy. West Winds 15 to 25 Mph shifting to the northwest 10 to 15 Mph late in the evening and overnight.
Mammoth Temperature Statistics
May Temperature
Klamath Falls International Airport (34.2 miles)
Lowest 14 May, 2026
26.7 °FAverage May
55.4 °FHighest 11 May, 2026
84.7 °F
Climate (2021–Present)
Klamath Falls International Airport (34.2 miles)
Average Low 2021–2026
34 °FAverage 2021–2026
48.9 °FAverage High 2021–2026
63.6 °F