What kind of clothing will I need for an 11 day visit to Petra, Jordan and Israel during the 1st week of March?
Have a look at this article from worldnomads.com, it's a good overall view.
You will be in those locations in winter, and snow is common in the high areas, and not unknown even in Amman. The desert can be very cold at night. Overall It won't be Swiss Alps cold - but close to it, so dress warmly.
Phil at the safety hub about 6 years ago