Weather in the West: Summer days can be quite warm, with highs in the 80s or even
90s, while nighttime temperatures fall to the 40s and 50s, due to the high altitude. Afternoon
thunderstorms are common over the higher peaks of the Rockies, but overall, the summer climate is sunny and pleasant. If you are traveling in the fall, temperatures out West may be quite warm, or somewhat on the cool side, or—even more likely—a bit of both.