Kaluga Region has a temperate continental climate with the pronounced seasons such as moderately hot and humid summer and cold winter with a stable snow cover. Kaluga Region climate is transitional from more humid climate of the European part of Russia western regions to the more arid and continental eastern regions. The average annual temperature is 3.5° — 4.5°C, the average annual rainfall is 600-700 mm.
The average duration of the winter period is about 95 days. The coldest month is January. The average temperature in various municipal districts is from 9.0° to -10.5°C. South-westerly winds predominate in winter.
During the thaw period the daytime temperature can reach 6 — 7 °C above zero. But in this period the thaws rarely last more than 2-3 days in a row.
Kaluga Region spring is not the entire calendar three-month period from March to May. March should be attributed to the pre-spring period, because in this month there are many typical winter processes.
The transition of the average daily temperature through + 15 ° C usually means the arrival and end of the summer period. Within these limits, Kaluga Region summer includes almost all of June, July and most of August. Compared with the summer period, there is increased wind in autumn. The second half of autumn is characterized by wet, windy, cold weather. During this period there are long drizzling rains.