Weather in Yosemite during May

May mornings in Yosemite sit around minus 2.5°C (28°F), with daytime highs reaching just 9.4°C (48°F)—cool enough that you'll see breath and frost on meadow grass, but warm enough that the valley floor dries by afternoon. Across the month, expect roughly 55mm of rain spread over about 9 days, often arriving as brief afternoon showers rather than all-day soaks. You're looking at nearly 13 hours of daily sunshine, which means long evenings for photography and hiking, though the sun's warmth doesn't build much heat. Nights drop sharply as soon as the sun sets.

Late May is shoulder season in Yosemite—the park is noticeably busier than April but hasn't yet hit the summer crush. Waterfalls are at their peak from snowmelt, so Half Dome and Yosemite Falls roar with power. Wildflowers begin dotting the meadows, and the valley floor comes alive with day-trippers and families. Accommodation prices tick upward from spring rates but remain lower than June through August. Ranger-led programs expand this month, and the valley feels purposeful rather than crowded—locals know it's a sweet spot before the peak season frenzy.

Historically, May in Yosemite has remained consistent over the past decade, with temperatures and rainfall patterns holding steady. 2026 aligns with this long-term norm; no major climate shift is expected to push temperatures significantly warmer or rainfall higher than the 30-year average. Late-season snow patches may linger above 8,000 feet depending on the winter, but the valley itself is fully accessible.

May suits hikers, photographers chasing wildflower light, and families wanting fewer crowds than summer. Plan around afternoon showers by starting hikes early and packing a lightweight rain jacket. If you're visiting in 2026, book lodging soon—May fills up faster than spring but faster than summer too. The combination of manageable crowds, powerful water features, and long daylight makes this an excellent month for first-time visitors and returning adventurers alike.