Venice is nearly always humid. The water that makes the city so unique also keeps the humidity level at about 80%. Keep this in mind, as the temperatures will feel more extreme. December-February, the average temperature is 32-37 F/0-3 C. Fog and wind often roll in with the coldest months. In summer, the humidity can become very uncomfortable. The hottest months are July and August, with average temperatures ranging 86-91 F/30-33 C.
In the fall and winter, sometimes even through spring, the water often rises above usual levels and floods many of the streets and squares, usually for a few hours at a time. Called acqua alta, or high water, the locals are used to dealing with it—tall rubber boots become de rigueur.
Weather Forecast
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What to Wear
The city's hot summers and cold winters seem even more extreme because of high humidity levels. In the hottest months, July and August, lightweight cotton clothes are preferable. Be sure to wear a hat and apply insect repellent and sunscreen before venturing out in the heat of the day.
In winter, dress in layers so that you can adjust to different temperatures when you stop at bars, museums and shops. In the coldest months (December-February), a scarf, hat and gloves are suggested, as well as an overcoat. You may also need a pair of waterproof boots in case of high water (acqua alta). Some hotels provide them, but you can buy an inexpensive pair if necessary. Do not, however, wear boots to a business meeting or a concert—take your shoes along in a bag and change before entering the building.
Comfortable shoes are essential in Venice, whether you are there on business or for pleasure. Walking is often the only way to get around the city. The city's business dress code is quite flexible. For men, a suit and tie are always best. There are no rules for women, as long as you dress fashionably (this is Italy, after all).