If you're looking for summer vibes, the best time to travel to Pendleton is in July, August and June, when the average temperature reaches 24.4 °C, while July, August and June are the 3 sunniest months of the year, with an average of 152.42 hours.
If you prefer colder temperatures, however, make sure you visit Pendleton during the months of December, January and February to experience an average of -2.38 °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 March, when the average precipitation in Pendleton is 3 mm, while the months of January, February and March are drier, with an average of 0 mm.