If you're looking for summer vibes, the best time to travel to Bloomington,IL is in June, July and September, when the average temperature reaches 25.17 °C, while September, June and July are the 3 sunniest months of the year, with an average of 146.78 hours.
However, if you prefer colder temperatures, make sure you visit Bloomington,IL during January, February or March to experience an average of -3.51 °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 Bloomington,IL is 8.25 mm, while the months of January, February and March are drier, with an average of 0 mm.