March is a very pleasant time to visit the UAE, with milder temperatures, averaging around 28 degrees in Dubai.
Typically at this time of year, it may rain for a short period on 3 or 4 days per month. Rainfall is very low.
In the mountains the temperatures are a little lower and temperatures at night can be feel very cold once the sun has set. The desert also can be very cold at night, so warm clothing is essential.