What to pack for San Francisco in October

A UV index of 5.6 in October still burns exposed skin in 11 hours of daylight.

Coastal glare off the water intensifies sun exposure even on mild days.

Mosquitoes breed in the Bay's marshes and fog doesn't stop them.

Check ankles and, if there's a dog, paws and ears every night.

Urban hiking to nearby parks means blisters, scrapes, and minor injuries happen.

Daylight runs 11.2 hours, so phones drain faster than the sun sets.

Overhead bins on regional flights fill fast on the San Francisco route.

Walking Golden Gate Park and the Presidio demands a bag that frees both hands.

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.

Coastal wind cuts through a t-shirt fast.

Seventy-four percent humidity and wind at 23 km/h pull sweat away from skin.

Treat the clothes once and it lasts weeks.

Three rain days in October mean tap water stays clean and drinkable.

One brick charges the laptop, phone, and camera.

Crowded museums, cable cars, and markets make bags easy targets for theft.

Three days of rain means damp clothes pile up faster than laundry happens.

Humidity at 74 percent keeps clothes damp for days without washing.

Wind gusts to 23 km/h blow hair into your eyes without a brim.

Tap water is safe, but your hands touch transit poles and rental bikes.

UV index of 5.6 and 74 percent humidity create conditions where sunburn and insect bites both happen.

Urban exploration with a camera and phone eats battery life by noon.

Domestic travel through airports still requires luggage security measures.

A guesthouse bathroom shared with other guests needs organized toiletries.