How much rainfall does mecca receive?

Rain usually falls in Mecca in small amounts between November and January. The rainfall, as scant as it is, also presents the threat of flooding and has been a danger since the earliest times. 

Small in the begging of the year, larger as the year progresses

There’s no picture, but i’ll give you a few of expeditions. lewis and clark began in 1804, louisiana purchase 1802, james town 1607