United States
Best Time to Visit San Francisco
San Francisco's mild Mediterranean climate means it's visitable year-round, but summer fog and winter rain create distinct seasonal trade-offs. The best months balance comfortable weather with manageable tourism crowds and reasonable hotel rates.
✦ Visit September–October for guaranteed warmth and clear views, or April–May for gardens and lower costs; avoid July–August unless you embrace fog and queues.
✅ Best months
September to October offer the most reliable sunshine, warmest temperatures (20–24°C), and fewer tourists than summer. May also ranks highly for mild weather and pre-summer pricing, though it's slightly cooler (15–19°C).
🔥 Peak season
July and August drive peak tourism despite cool, foggy mornings; international school holidays and warm afternoons (18–21°C) justify the rush. Hotel rates spike 40–60% above annual averages; major attractions see queues by mid-morning. September is a secondary peak as summer visitors linger and locals return from holidays.
💷 Shoulder (best value)
April–May and October–November offer the sweetest value: hotel discounts of 20–30% versus peak season, pleasant 15–20°C temperatures, and manageable crowds. May blooms with wisteria and wildflowers; October delivers clearer skies and early autumn warmth without summer's fog.
🌙 Quietest & cheapest
December to February is cheapest (hotels 35–50% below peak) and quietest, but expect rain (November–January is wettest), overcast skies, and cooler temperatures (9–14°C). Many outdoor attractions and smaller museums keep normal hours, and cultural venues are well-stocked.
San Francisco season by season
Spring (Mar–May)
Weather: 9–20°C; increasing sunshine; occasional rain through April
Crowds: medium
Gardens peak (Japanese Tea Garden, Filoli); wildflower season begins; locals embrace outdoors after winter
Summer (Jun–Aug)
Weather: 12–21°C; famous fog blankets mornings/coast; afternoons warm but breezy
Crowds: high
Peak tourism; summer events (Outside Lands music festival, Fleet Week); fog frustrates visitors unfamiliar with Mark Twain's quip
Autumn (Sep–Nov)
Weather: 11–24°C; warmest, clearest period; September–October shine; November greyer
Crowds: medium
Indian summer effect; best hiking and bay views; fewer families on school trips; October Fest at Pier 39
Winter (Dec–Feb)
Weather: 7–14°C; frequent rain (Jan–Feb especially); grey skies; occasional clear, crisp days
Crowds: low
Holiday markets and lights (December); cheapest rates; fewer tourists; indoor museums and dining shine
🎭 Events worth timing a trip around
Outside Lands Music Festival (August, Golden Gate Park) and Fleet Week (October, military aircraft over bay and parade); both drive moderate surges in hotel demand and restaurant reservations.
🧳 What to pack
Layer obsessively: San Francisco's microclimates mean fog-free 25°C inland neighbourhoods contrast sharply with windswept 12°C waterfronts; a lightweight waterproof jacket is essential year-round.
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Room tips, the 14-day forecast for your exact stay, dining, transport and more — free for any San Francisco hotel.
Guide last updated June 2026.