What to Wear in San Francisco in Fall: Month-by-Month Outfit Guide
San Francisco in fall sits in the 65 to 75°F range. This is the layer-by-layer outfit guide for San Francisco's fall weather — what to wear, what to pack for a visit, and the local context that shapes the recommendations.
WHAT TO EXPECT
San Francisco in fall — September, October, November. September through November. SF's warmest season — often called Indian Summer. 65-75°F, clearer skies, less fog. The best months. The temperature range is the headline; what you actually feel depends on humidity, wind, and what indoor spaces you'll cycle through.
THE FOUNDATION LAYER
A standard cotton or synthetic shirt is fine. The base layer is conversation-piece territory — not survival.
THE MID LAYER
Optional. A light cardigan or unstructured blazer handles cool mornings and air-conditioned interiors.
THE OUTERWEAR
Optional. A linen blazer or light overshirt handles cool evenings and indoor air conditioning.
ACCESSORIES
A scarf for cool mornings, a packable umbrella, and shoes you can walk in for an hour.
WHAT TO PACK FOR A TRIP TO SAN FRANCISCO IN FALL
Three layer permutations covering the 65 to 75°F range, plus accessories. If your trip spans the season's edge (late August or early December), pack toward the cooler end of the range — overestimating warmth is easier to recover from than underestimating.
LOCAL CONTEXT
Layer aggressively. Always pack a sweater and a windbreaker, even in July. Microclimates are extreme — Mission can be 15°F warmer than Outer Sunset on the same day.