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Israel has a wide variety of climatic conditions, caused mainly by the country’s diverse topography. There are two distinct seasons: a cool, rainy winter (October–April) and a dry, hot summer (May–September). Along the coast, sea breezes have a moderating influence in summer, and the Mediterranean beaches are popular. Precipitation is light in the south, amounting to about 1 inch (25 mm) per year in the ʿArava Valley south of the Dead Sea, while in the north it is relatively heavy, up to 44 inches (1,120 mm) a year in the Upper Galilee region. In the large cities, along the coastal plain, annual rainfall averages about 20 inches (508 mm) per year. Precipitation occurs on about 60 days during the year, spread over the rainy season. Severe summer water shortages ensue in years when the rains come late or rainfall totals are less than normal.
Average annual temperatures vary throughout Israel based on elevation and location, with the coastal areas adjacent to the Mediterranean Sea having milder temperatures—ranging from about 84 °F (29 °C) in August to about 61 °F (16 °C) in January—and higher rates of humidity than areas inland, especially during the winter. Likewise, higher elevations, such as Upper Galilee, have cool nights, even in summer, and occasional snows in the winter. However, the coastal city of Eilat, in the south, despite its proximity to the Red Sea, is closer to the climate of the Jordan and ʿArava valleys and the Negev, which are hotter and drier than the northern coast; there, daytime temperatures reach about 70 °F (21 °C) in January and may rise as high as 114 °F (46 °C) in August, when the average high is 104 °F (40 °C).
Plant and animal life
Natural vegetation is highly varied, and more than 2,800 plant species have been identified. The original evergreen forests, the legendary “cedars of Lebanon,” have largely disappeared after many centuries of timber cutting for shipbuilding and to clear land for cultivation and goat herding; they have been replaced by second-growth oak and smaller evergreen conifers. The hills are mostly covered by maquis, and wildflowers bloom profusely in the rainy season. Only wild desert scrub grows in the Negev and on the sand dunes of the coastal plain. North of Beersheba, most of the country is under cultivation or is used for hill grazing. Where irrigation is available, citrus groves, orchards of subtropical fruit, and food crops flourish. Millions of trees have been planted through a government reforestation program.
Animal life is also diverse. Mammals include wildcats, wild boars, gazelles, ibex, jackals, hyenas, hares, coneys, badgers, and tiger weasels. Notable among the reptiles are geckos and lizards of the genus Agama and vipers such as the carpet, or saw-scaled, viper (Echis carinatus). More than 400 species of birds have been identified in the region, including the partridge, tropical cuckoo, bustard, sand grouse, and desert lark. There are many kinds of fish and insects, and locusts from the desert sometimes invade settled areas. Several regions have been set aside as nature reserves, notably parts of the ʿArava in the south and Mount Carmel, Mount Meron, and the remains of the Ḥula Lake and marshes in the north. The Mediterranean coast and the Jordan and ʿArava valleys are important routes for migratory birds.