The rain in the Bible doesn't signify anything. God never promised to bless the church with abundance or in abundance of blessings.

Most of our blessings are spiritual in nature.

(Ephesians 1:2-6 NIV) Grace and peace to you from God our Father and the Lord Jesus Christ. {3} Praise be to the God and Father of our Lord Jesus Christ, who has blessed us in the heavenly realms with every spiritual blessing in Christ. {4} For he chose us in him before the creation of the world to be holy and blameless in his sight. In love {5} he predestined us to be adopted as his sons through Jesus Christ, in accordance with his pleasure and will-- {6} to the praise of his glorious grace, which he has freely given us in the One he loves.