Why is it raining so much in Denver?

Question

Why is it raining so much in Denver?

Answer 1

Jesus is angry at John Elway.

Answer 2

The Indians have been doing a lot of rain dances there.

Answer 3

There was an upper level low pressure system that basically parked over western Colorado.  The rotation of this upper low brought smaller upper disturbances which interacted with a lot of low level moisture being blown up against the mountains.  These factors all combined to produce a fairly long period of good rains.