PlanoPlanoSeptember through November is San Francisco's true warm season with the clearest skies and warmest temperatures. Don't make the mistake of visiting in June-July expecting summer — the fog is thick and temperatures hover around 14°C. October is the standout month.
| Month | Temp | Rain | Crowds | Prices |
|---|---|---|---|---|
| January | 11°C | 110mm | Low | Moderate |
| February | 12°C | 95mm | Low | Moderate |
| March | 13°C | 75mm | Medium | Moderate |
| April | 14°C | 30mm | Medium | Moderate |
| May | 14°C | 15mm | Medium | Moderate |
| June | 16°C | 3mm | High | Expensive |
| July | 16°C | 0mm | High | Expensive |
| August | 17°C | 1mm | High | Expensive |
| SeptemberBest | 18°C | 5mm | High | Expensive |
| OctoberBest | 17°C | 25mm | High | Expensive |
| NovemberBest | 14°C | 55mm | Medium | Moderate |
| December | 11°C | 95mm | Medium | Moderate |
Gradually warming (13-14°C) as winter rain subsides. The iconic fog hasn't arrived yet, making spring one of the clearer seasons. Wildflower blooms at Lands End and Marin Headlands.
Famously foggy and cool (14-17°C) — Mark Twain's "coldest winter" quote applies. Karl the Fog blankets the city in June-July. Layers are essential. September-October is the actual warm season.
San Francisco's true summer (17-18°C) with the warmest and clearest weather. September and October deliver blue skies, warm days, and the city at its most beautiful.
Rainy season (11-14°C) with the most precipitation. The city is atmospheric in rain, and indoor attractions like museums, Chinatown, and the food scene shine.
June
August
October
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Plan my San Francisco tripJune through September is technically peak tourist season, though June-July visitors are often surprised by fog. September-October is the most pleasant but also busy.
January through March offers the lowest hotel prices during the rainy season. Midweek winter visits are particularly affordable.
September and October are the best months for cycling the Golden Gate Bridge, hiking Marin Headlands, and exploring Alcatraz with clear views.