September and October are usually the warmest and sunniest months, when San Francisco gets its Indian summer. April and May can also be warm and sunny. It doesn’t normally get hot in the city although spring and fall sometimes see temperatures in the 80’s. You’ll still need a sweater or jacket most evenings at least.
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Things I Won’t Pack for San Francisco : Super-high heels or stilettos. Formal dresses or anything too fancy. Pieces I can’t layer. Too many warm-weather items. Impractical bags.
No matter the season, here are a few tips on what to wear in San Francisco year-round: Always Dress in Layers. Pack a Jacket or Warm Layer. Wear Open-Toed Shoes at Your Own Risk. Avoid Flowy Dresses and Skirts. What to Wear to Dinner: No Need for Formal Wear . Spring Day Trip Tips. Summer Day Trip Tips. Fall Day Trip Tips.
How Not to Look Like a Tourist in San Francisco Always layer. If you must buy a sweatshirt, get anything related to the 49ers. And save those Google or Facebook T-shirts. Still, think casual Leave your umbrellas at home. Don’t , under any circumstances, call the city San Fran . Do stroll around Chinatown, but don’t make it a dining destination.
To the east, heat in the valley creates thinner air and low pressure. The valley becomes like a vacuum that wants to be filled by the heavier marine layer. It pulls that layer over San Francisco , which typically makes the city cooler than other parts of California — and the country — in the summer.
Typically, this cold air remains off the coast, but as we enter the summer season, intense heating of inland areas, such as the Central Valley and Mojave Desert, sets up a broad area of low pressure known as a thermal low. If this marine layer is deep and moist enough, low clouds and fog are the result.
Overall, most San Francisco neighborhoods are not dangerous. But if you want to be sure you’re sticking to the safest areas for tourists, Fisherman’s Wharf and Chinatown have low crime rates and are fun to visit too.
Living here is expensive—more expensive than New York City. Unless you’re moving from New York City, the sticker shock of San Francisco will take you by surprise. And it’s not just the cost of housing. San Francisco’s culinary scene is so diverse and exciting, you’ll be tempted to feast everywhere.
How San Francisco is Performing. Mobile sources of air pollution from cars, trucks, ships, emissions from construction equipment, and tire and brake wear on roadways are the biggest root cause of poor air quality in the city, and addressing these should result in positive air quality trends.
It rarely snows in San Francisco , and when it does , temperatures are not cold enough to allow for accumulation. However, snow is common in some regions that neighbor the city. Northern California has a significant amount of moisture in the air, but temperatures are not cold enough for snow to be produced.
Health Message: None