Qom is considered to be a semi-arid climate with very beautiful urban landscaping, parks and recreation areas. And the city experiences 4 seasons where winters can get cold with temperatures reaching zero (Celsius). It rarely snow but it does rain time to time.
Summers can also get hot with temperatures hitting 40 Celsius.
Houses are very comfortable as there are gas or electric heaters in all places for the winter and air-conditioners or coolers for the summer.