San Francisco climate in June 2026

June in San Francisco is deceptively cool. Mornings roll in with thick fog that clings to the Golden Gate Bridge until mid-morning, keeping temperatures around 12.7°C (55°F). By afternoon, the marine layer burns off and you're looking at 19.4°C (67°F)—warm enough to sit outside, but not warm enough to ditch the sweater. Rain is virtually nonexistent (1.3mm total), and you'll get 13.2 hours of sunshine daily once that fog lifts. It's the classic San Francisco paradox: it looks sunny, but the air carries a chill that catches visitors off guard.

The city is in full swing by June. Summer tourist season is ramping up, but it hasn't peaked yet—that happens in July and August. You'll find crowds at the Ferry Building, Alcatraz, and Golden Gate Park, but the lines are manageable. The Ferry Plaza Farmers Market is at its colorful best, local bookstores host author events, and outdoor patios start filling with people who've finally shed their winter layers. Prices for hotels and restaurants have ticked up from spring, but you're not yet in peak-season gouging territory.

Over the past decade, June temperatures in San Francisco have remained remarkably stable, hovering in that 19–20°C range for highs. What's shifted slightly is the fog pattern—it's been arriving a bit later some years, meaning more morning sun. 2026 conditions align with the historical norm, so expect the same reliable coolness that's defined the Bay's early summer for years.

June suits photographers (the fog creates drama), layering enthusiasts, and anyone who finds 20°C perfect for walking around without overheating. Families appreciate the long daylight and manageable crowds. If you're planning a 2026 trip, pack for variable conditions and you'll be comfortable exploring neighborhoods, hiking Lands End, or catching a Giants game at Oracle Park.