The maximum temperature in Sanandij is on average 17°C over the year, with values generally ranging between 2°C in January and 33°C in July. Rains remain limited, with about 484 mm of precipitation per year. The driest month receives 1 mm in August, versus 87 mm in February for the wettest.
The weather is pleasant to stay to Sanandij in: May, June, July, August and September. However, the period when the weather is truly ideal is June, July and August.
For hiking and trekking, the best months are April, May, June and September.
In terms of crowd levels, the quietest periods are in February, while crowding is high in May, June, September, December, July and August.