I was in the Tetons/Yellowstone NP for 3 days, and only saw the mountains for an hour. Shortly after I took this photo, the clouds thickened and it remained cloudy/rainy for the remainder of the time I visited this wonderful park!
It was lightly raining on me when I took this picture, and I was wearing rainproof clothes and had a trash bag covering my camera and lens so they wouldn't get wet. Temps were in the upper 30s, lower 40s.