If you're looking for summer vibes, the best time to travel to Grand Junction, CO is in June, July and August, when the average temperature reaches 23.67 °C, while June, July and September are the 3 sunniest months of the year, with an average of 185.99 hours.
However, if you prefer colder temperatures, make sure you visit Grand Junction, CO during January, December or February to experience an average of -6.23 °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 February, December and January, when the average precipitation in Grand Junction, CO is 4.15 mm, while the months of January, February and March are drier, with an average of 0 mm.