You might be picturing yourself strolling by the Seine in the warm sunshine, but depending on the time of year you visit Paris, the reality can be quite different. Paris is cold in the winter and has a rainy season in the spring. Summers can range from jacket weather to a heat wave. Before you throw anything in your bag, check the forecast for your visit. It will help you decide if you need a bag full of sweaters, summer dresses or a raincoat.
Although the Metro makes travel from point to point in the city easy, you can still expect to do a lot of walking if you plan to sightsee or shop. Comfortable shoes are a must, though tennis shoes scream "tourist." A small bag you can use to carry your money, city map and other odds and ends will also come in handy.
Casual cafes dot the French capital, and dress codes are not a concern in these establishments. If you plan on dipping into some of that famous French fine dining, however, you will need to clean up for the occasion. Suits and ties and dresses or skirts are de rigueur at most upscale French restaurants.
There are no hard and fast cultural rules that should impact the way you pack for Paris, but if you are concerned about not sticking out as a tourist, here are a few things to help you blend in with the locals. Parisians seldom dress sloppily. Even casual dress is well put together. Think button downs instead of T-shirts, dark-colored jeans, understated accessories, tailored jackets and flats, heels or loafers instead of tennis shoes. Sweatpants and track suits are a no-no if you don't want to stand out. Ball caps are also not usually worn by locals.