Temperature
Pleasant by day, brisk at night.
Mammoth Mountain is most comfortable in summer and early autumn. Summers are warm and winters are cold. The wettest months are roughly December to February. Humidity is usually low.

Pleasant by day, brisk at night.
One of the driest months, with very little rain.
Plenty of sun this month.
Humidity is rarely noticeable.
In August, afternoons feel about 68° and nights feel near 44°.
Predominantly clear skies.
August late afternoons are around 75°F, easing to about 66°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Mammoth Mountain with Banff.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 25, 2026
Data & methodology