Weather forecast for the John Muir Trail in August

Northern California

At the start in Happy Isles, the weather is predominantly sunny with temperatures peaking at 28°C and dipping to 8°C. As hikers proceed to Sunrise Creek, sunny intervals mix with showers, and temperatures range from 22°C to 28°C. Lower Cathedral Lake continues with sunny spells, patchy rain, and highs of 27°C. In Tuolumne Meadow, clear skies dominate despite intermittent cloudy periods. Higher up at Donahue Pass, the weather remains sunny, though the area can experience moderate rain, with temperatures from 15°C to 24°C. Garnet Lake experiences sunny days with some rain, while transitioning to Red’s Meadow offers clearer skies, albeit with patchy rain at times. At Lake Virginia, sun and occasional showers prevail, before reaching the area just past the bridge, where sunny outlooks and rain showers are common.

Eastern Sierra

Beginning at Marie Lake, sunny days are periodically interrupted by showers, with highs reaching 33°C. The trend continues at Muir Trail Ranch, where sunny periods intersperse with moderate rain showers. McClure Meadow showcases sunny and warm conditions, occasionally clouding over. Medium Lake faces sunny spells interrupted by some heavy showers. At Deer Meadow, mostly sunny skies are observed, with rain patches in between. Taboose Pass Junction offers sunny conditions, with sporadic heavy showers. Middle Rae Lake sees intermittent rain amid sunny days, while Center Basin Creek receives moderate to heavy rain showers. Wright Creek maintains sunnier weather with brief rain phases. Approaching Guitar Lake, sunny conditions frequently lead, punctuated by heavy rain at times. In the Whitney Zone, sunny spells dominate, but occasional heavy rain showers occur. Lastly, at Whitney Portal, sunshine prevails with minimal rainfall, ensuring a dry conclusion to the hike.