August in Yosemite National Park is a good month: highs around 90°F, lows around 56°F. Crowds: peak crowds — #1 busiest of the park's 12 months. Falls fade to a trickle; wildfire smoke possible. The editorial best window here is May–June.
| Verdict | Good A solid visit with a caveat — usually crowds or heat. |
|---|---|
| Temps °F | 90° high / 56° low |
| Crowds | peak crowds · #1 busiest of the park's 12 months |
| What August is like | Falls fade to a trickle; wildfire smoke possible |
| Best window (whole year) | May–June |
| Peak crowds (whole year) | Jun–Aug |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
Yosemite National Park in September — Good, highs around 84°F, crowds: busy (warm, calmer valley — climbers' season on el cap).
Our verdict for August is "Good". A solid visit with a caveat — usually crowds or heat. Expect highs around 90°F and lows around 56°F, with crowds at the "peak crowds" level. Temperatures are approximate NOAA normals at the main visitor elevation; crowd levels follow published NPS visitation statistics.
Across the full 12-month review, the best window is May–June, and the peak-crowd months are Jun–Aug. August itself we rate "Good".
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