Microclimates can be found throughout the Valley because of the variety of elevations and bodies of water. Average rainfall is 12-15 inches per year.
Snow comes early in the mountains and varies greatly from year to year on the Valley floor.
Annual Sunny Days - 270. The Bitterroot Valley is nestled between two mountain ranges on the western edge of the state. We offer uncommonly beautiful scenery and a wide range of activities for everyone of all ages. The Bitterroot Valley is 25 miles wide and 96 miles long covering 2,383 square miles. The plant's botanical name is Lewisia rediviva which comes from the explorers name.