The climate in Irkutsk used to be ‘distinctly continental’ with nearly 80 degree difference between summer and winter temperatures but became slightly warmer and more humid after the construction of the hydro-electric power station. What remained is the extreme variation of temperatures, both between seasons and sometimes within a day.
Winter here traditionally lasts not less than 5 months, with temperatures dropping down to minus 40°C.
Still the winter weather is less extreme and often enjoyable, as although the winter days are frosty they are all also very sunny with little wind and beautiful fluffly snow.
Summers are usually short with increasing humidity throughout June and July, which are both extremely hot with July also being the wettest of all summer months.
Spring is usually cool and dry, with the temperature beginning to increase towards the beginning of May. Autumn is sunny, warm and dry. First frosts start creeping back in early October.