The best times of year to visit Tel Aviv are in the spring and autumn, when temperatures are warm and nights are cool and refreshing. In summer, the humidity in Tel Aviv can be quite oppressive, relieved only in air-conditioned hotels, restaurants and shops. The natural way to escape the heat is by dipping into the refreshing Mediterranean. Sea breezes offer some summertime relief as well.
In spring and autumn, Israel sometimes experiences a dry, seasonal heat wave known as a sharav, which originates in the African or Arabian deserts and clouds the skies with sand. Surprisingly, during these times Tel Aviv is often cooler than Jerusalem, due in part to its proximity to the sea.
The rainy season in Israel is usually October-March, although it occasionally rains earlier and later in the year as well. A day or two of rain can be followed by a week of cloudless skies, so don't expect the weather to interfere with your visit, even in the winter. Tel Aviv homes are usually equipped with air conditioners but not always with heating, so winter nights can be quite cold. Hotels, on the other hand, make sure their guests remain comfortable year-round.
Average temperatures in Tel Aviv range 55 F/13 C in January and February to 78 F/26 C in July and August, but they can easily climb to the mid-90s F/mid-30s C.