Stormy Skies rain spell
For this you need a mop, a bucket of water, and an umbrella. Go outside and set the bucket down. Dip the mop into the bucket, making sure it gets thoroughly wet. Point the mop in each of the four directions, stating at each point why you need the rains to come. Then, put the umbrella up and run for cover. Not to be done lightly, as you are likely to produce far more rain than you bargained for.