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What to pack for San Francisco in September
Typical September, built from ten years of weather
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Typical for your dates
Highs 70°F, lows 57°F, rain 1 of 30 days
windyhigh UVdry
Sunset lands around 7:15pm. Wind averages 16 mph. No border paperwork on this one.
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Packing for
38 things on this list are on sale today
Essentials
10 items
UV index of 7.9 burns skin fast, especially on water-facing walks.
Glare off the bay and pavement intensifies at midday.
Seventy-eight percent humidity near the coast brings mosquitoes inland.
Check ankles and, if there's a dog, paws and ears every night.
Urban terrain and water access mean cuts, stings, and minor injuries happen.
Twelve daylight hours drain phone batteries faster than at home.
Fourteen meters above sea level with minimal rain means light packing works.
National parks nearby require daily trips with supplies and water.
Fits the overhead on every airline that matters. Skip the checked-bag line entirely.
For the passport, the chargers, and the one dry pair of socks.
Before you go
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Recommended
11 items
Coastal wind cuts through a t-shirt fast.
Wind gusts to 26 km/h funnel through the bay, chilling exposed skin.
Twelve hours of daylight means sustained heat and sweat even at cool temperatures.
UV hits 7.9 here. Long sleeves beat reapplying sunscreen every hour.
One rain day a month means clear skies and strong overhead sun.
Treat the clothes once and it lasts weeks.
Tap water is safe but carrying your own beats buying bottles daily.
One brick charges the laptop, phone, and camera.
Urban crowds and public transport create theft risk.
Humidity at 78 percent makes organized packing essential to prevent mildew.
Cool temperatures slow laundry drying; detergent lets you wash more often.
Nice to have
6 items you could skip
Lips crack from wind and UV exposure at this altitude.
Public transit and crowded attractions spread germs year-round.
Insect bites itch and burn under constant sun exposure.
Charging devices while sightseeing requires short cables that fit tight spaces.
Hostels and shared accommodations need locks for personal gear.
Bathroom humidity at 78 percent demands ventilation for toiletries.
Basics
16 things you probably own already