when is the winter season at riyadh,SA and how long it was?

Answer 1

The seasons in Riyadh are the same as those for the rest of the northern hemisphere except that it's considerably warmer year round.

The coldest time of the year (winter) are the months of Dec, Jan and Feb and it's also around this time that it's most likely to rain. Winter in Riyadh is quite similar to spring in somewhere hot in the US such as Phoenix.

Here's the climate data for Riyadh - http://www.climate-zone.com/climate/saudi-arabia/fahrenheit/riyadh.htm

Answer 2

jan. and feb.