Israel's weather is wonderful but unpredictable - the winter can be cold and rainy or sunny and mild. The summer, is usually hot and dry during the day and cool at night. In both seasons, layering is key to comfort. On most trips, every day is very active, so wear clothes that you will be comfortable wearing all day, walking, hiking and being outdoors. Shabbat is the time to step up your wardrobe, as well as your leisure night. There will not be a chance to do laundry, so bring enough to last you without overwearing everything too much. Try to pack as lightly as possible, you will be responsible for carrying your own luggage. One large rolling suitcase or duffel bag for your checked baggage per person is recommended, and a backpack for your carry-on and packable tote bag for day trips.
* Electrical equipment has to be adaptable to 220 volts and have a European adapter for the prong. Equipment on a motor (i.e., electric shaver) must be adaptable to 50 Hz (as opposed to 110 volts and 60 Hz for North America).