I loved this blessing from GreenPrints, a gardening publication I subscribe to. I hope you enjoy it as much.
May the blessing of the rain be on you-
the soft sweet rain.
May it fall upon your spirit
so that all the little flowers may spring up,
and shed their sweetness on the air.
May the blessing of the great rains be on you,
may they beat upon your spirit
and wash it fair and clean,
and leave there many a shining pool
where the blue of heaven shines,
and sometimes a star.