If you're looking for summer vibes, the best time to travel to Lethbridge is in August, July and June, when the average temperature reaches 22.31 °C, while August, June and July are the 3 sunniest months of the year, with an average of 38.41 hours.
However, if you prefer colder temperatures, make sure you visit Lethbridge during January, February or December to experience an average of -11.31 °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 Lethbridge is 1.78 mm, while the months of January, February and March are drier, with an average of 0 mm.