Commentaries:
Those who ask for it—sincerely—will get the rain that God promises. These people were obviously worshipping God. He would not have heard them or answered their prayers if they were idolaters. This shows that God does not just withhold rain when sin prevails; it works the other way as well. If we do right, if we ask Him in sincerity and humility, He will give rain in due season.
At the end of verse 2 and the beginning of verse 3, God promises to punish the shepherds—a type of either the religious or civil leadership—for leading the sheep into idolatry, ungodly ways, and lies that will not produce any good for them either now or in the long run. He will make His point, and one of the ways that He does so is through drought, lack of rain.
Richard T. Ritenbaugh
The Two Witnesses (Part Six)