Is it not wheat harvest to day? I will call unto the LORD, and he shall send thunder and rain; that ye may perceive and see that your wickedness is great, which ye have done in the sight of the LORD, in asking you a king. 1 Samuel 12:17
Is it not wheat harvest? The time of wheat harvest was May and June. From early spring till late autumn no rain falls in Palestine. During the summer months “a cloud seldom passes over the sky, and a thunderstorm is a miracle” (G.A. Smith).
(Hertz, Dr. J.H., The Pentateuch and Haftorahs, 2nd Ed., Soncino Press, London, 1992, pg 651)