The sweet spot for Yosemite National Park is May–June; the heaviest crowds hit in Jun–Aug. Below is the honest month-by-month picture — crowds, real temperatures and what each month actually feels like.
| Month | Verdict | Temps °F | Crowds | What the month is like |
|---|---|---|---|---|
| January | Shoulder | 48° / 28° | quiet | Valley open and quiet; tire chains often required |
| February | Shoulder | 53° / 30° | quiet | Horsetail Fall 'Firefall' glows late February (weekend reservations) |
| March | Shoulder | 58° / 34° | quiet | Waterfalls waking; Tioga & Glacier Point roads still closed |
| April | Good | 65° / 39° | moderate | Waterfalls surge; dogwoods bloom along the Merced |
| May | Best window | 73° / 46° | busy | Waterfalls at full thunder — the classic Yosemite month |
| June | Best window | 82° / 52° | peak crowds | Half Dome cables go up; high country opens |
| Julynow | Good | 90° / 57° | peak crowds | Hot valley afternoons; peak-hours entry reservation in effect |
| August | Good | 90° / 56° | peak crowds | Falls fade to a trickle; wildfire smoke possible |
| September | Good | 84° / 51° | busy | Warm, calmer valley — climbers' season on El Cap |
| October | Good | 72° / 42° | moderate | Golden light and thin crowds |
| November | Shoulder | 57° / 33° | quiet | Glacier Point Road closes with the first real snow |
| December | Shoulder | 48° / 28° | quiet | Quiet, festive valley; chains required after storms |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
Peak-hours entry reservation · required on busy summer days (~6am–2pm)
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