hi there,
The best time to visit Jordan is between March and May) and between September and November as the temperatures are warm and cool.
If you're planning to visit in winter, be aware that
Jordan can be surprisingly cold and the deserts can be freezing, especially at night so, make sure you have plenty of warm clothes and a windproof and waterproof jacket.
If you visit during the month of
Ramadan make sure u do not eat, drink or smoke in public. This is also a busy time so book hotel rooms in advanced.