If you're looking for summer vibes, the best time to travel to Riverton, WY is in July, August and June, when the average temperature reaches 20.7 °C, while July, June and August are the 3 sunniest months of the year, with an average of 193.27 hours.
However, if you prefer colder temperatures, make sure you visit Riverton, WY during December, January or February to experience an average of -9.35 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and July, when the average precipitation in Riverton, WY is 2.07 mm, while the months of January, February and March are drier, with an average of 0 mm.