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San Francisco Climate Overview
San Francisco has a unique Mediterranean climate shaped by the cold Pacific Ocean and famous summer fog. Unlike most U.S. cities, SF’s warmest months are September and October – not July and August. The city is known for its microclimates: you can experience fog, sun, and wind all in one day just by moving a few blocks.
Year-round temperatures stay remarkably mild, typically ranging from 10-22°C (50-72°F). There’s no snow, no extreme heat, and no real winter – just layers and a willingness to embrace the fog.
Seasonal Snapshot
- 🌫️ Summer (Jun-Aug): Famous for fog – “June Gloom” and “No Sky July.” Mornings are gray, afternoons may clear. Temperatures hover around 15-21°C (59-70°F). Pack layers.
- ☀️ Fall (Sep-Oct): SF’s true summer. Warmest, sunniest months with clear skies and temperatures reaching 22-24°C (72-75°F). Perfect for outdoor exploring.
- 🌧️ Winter (Nov-Feb): Rainy season. Mild temperatures (10-15°C / 50-59°F) with occasional storms. Least crowded, best hotel deals, green hills after rains.
- 🌸 Spring (Mar-May): Transition season. Rain tapers off, days lengthen. Wildflowers bloom, hills turn gold by May. Temperatures climb slowly toward summer.
Suggested Hotels in San Francisco
Fairmont San Francisco
A Nob Hill landmark since 1907 with marble columns, a famous tiki bar, and panoramic bay views from the top of California Street. Best for luxury travellers who want classic San Francisco grandeur and cable car access at the doorstep. Check rates and availability
Hotel Zephyr
A playful mid-range hotel at Fisherman’s Wharf with nautical-themed rooms, a large courtyard with fire pits and games, and views of the bay and Alcatraz. Best for families and couples who want a fun, central Fisherman’s Wharf base. Check rates and availability
HI San Francisco Fisherman’s Wharf
A clean, well-located budget hostel in Fort Mason with dorm beds and private rooms, bay views, and free breakfast. Best for backpackers who want a quiet, scenic budget base near the Wharf and Marina. Check rates and availability
Explore San Francisco in Depth
Choose a topic below to dive deeper into everything San Francisco has to offer:
- San Francisco Weather by Month – Complete month-by-month breakdown with temperatures, rainfall, fog patterns, and what to pack for each month.
- Best Time to Visit San Francisco – Find the ideal time for weather, budget, crowds, photography, wine country, and more.
- San Francisco Events & Festivals – Calendar of SF’s best cultural celebrations, food festivals, and seasonal events.
- SF Microclimates & What to Pack – Master SF’s fog zones, sun zones, and exactly what layers to bring for every neighborhood and season.
- Where to Stay in San Francisco – Best neighborhoods from Union Square to the Mission. Compare areas for every travel style and budget.
- Getting Around San Francisco – Walking, Muni, BART, biking, and driving tips for SF’s hills and microclimates.
- SF Travel Tips & FAQ – Insider advice, money-saving strategies, safety tips, and answers to common questions.
Quick Facts
- 🌡️ Warmest months: September and October (avg high 22°C / 72°F)
- ❄️ Coolest month: January (avg high 14°C / 57°F)
- 🌧️ Rainiest months: December through February
- 🌫️ Foggiest months: June through August (“Fogust”)
- 🏊 Ocean temperature: 12-15°C (54-59°F) year-round – wetsuit recommended
- 🗻 Microclimates: Up to 10°C (18°F) difference between neighborhoods on the same day
