For the analysis of the dry bulb temperature, we see that Arkhangelsk is a very cold city, as the maximum temperature is about 20°C in summer and -15°C in winter as average, and it can change a lot in the same day, even of 18°C; during all the winter period the temperatures are very low, and they can reach even values around -30°C; moreover, the situation is very similar between November, February and April; only in July the temperatures increase to reach almost 30°C. The amount of solar energy received is around 7000 Wh/m2 in summer and 1000 Wh/m2 in winter.