Deuteronomy 11:14

The first rain and the latter rain - The former is the proper term for the autumn rain, falling about the time of sowing, and which may be named “the former,” as occurring in the early part of the Hebrew civil year, namely, in October and November. The other word is applied to the spring rain, which falls in March and April, because it fits the earth for the ingathering of harvest. Between these two wet periods, and except them, there was little or no rain in Canaan.