Compared to Barcelona, Spain the temperature of Irkutsk, Russia is cold.
Barcelona has a Mediterranean climate with warm to hot summers and mild winter temperatures.
Irkutsk, Russia currently has a humid continental climate. This is characterized by warm summers and cold winters. This was not always so. It used to be classified as subarctic prior to the year 200. Irkutsk temperatures, on average, are a lot cooler than Barcelona.