Israel's climate is characterized as a subtropical one, when the country is located between the tropical zone and the temperate zone.
Most of the regions of the country are considered as a Mediterranean region with that kind of climate, which is cold and rainy at the winter time and at the summer it is hot and dry. 
 
From the month of June until the end of August, it is the summer season in Israel, when the temperatures are moving between 26 to 32 degrees in average: Tel aviv 26- 30, Jerusalem 25-29, Eilat 35- 40 and Haifa 25-30.
From the month of September until November it is fall, when the average of the temperature is between 30 to 23 degrees in average: Tel aviv 15- 28, Jerusalem 16-26, Eilat 20- 33 and Haifa 16-27.

Between the month of December and the month of February, it is the winter time in Israel, when temperatures are moving from 18- 21 degrees in average: Tel aviv 9-19, Jerusalem 7-14, Eilat 11-23 and Haifa 9-18.
And in the spring time, between the month of March and the month of May, the temperatures are from 22 to 25 in average: Tel aviv 12- 22, Jerusalem 12-21, Eilat 17- 31 and Haifa 13-26. 

Israel Meteorological Service