If you're looking for summer vibes, the best time to travel to Yankton,Sd is in June, July and August, when the average temperature reaches 25.22 °C, while July, June and August are the 3 sunniest months of the year, with an average of 167.17 hours.
If you prefer colder temperatures, however, make sure you visit Yankton,Sd during the months of January, December and February to experience an average of -7.02 °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 Yankton,Sd is 5.6 mm, while the months of January, February and March are drier, with an average of 0 mm.