If you're looking for summer vibes, the best time to travel to Marion is in June, July and September, when the average temperature reaches 24.76 °C, while September, August and May are the 3 sunniest months of the year, with an average of 135.32 hours.
However, if you prefer colder temperatures, make sure you visit Marion during January, February or March to experience an average of -3.38 °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 Marion is 6 mm, while the months of January, February and March are drier, with an average of 0 mm.