If you're looking for summer vibes, the best time to travel to Kaluga is in August, July and June, when the average temperature reaches 17.26 °C, while August, June and May are the 3 sunniest months of the year, with an average of 101.33 hours.
If you prefer colder temperatures, however, make sure you visit Kaluga during the months of January, February and March to experience an average of -6.33 °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, April and June, when the average precipitation in Kaluga is 1.78 mm, while the months of January, February and March are drier, with an average of 0 mm.