The maximum temperature in Kermanshah is on average 22°C over the year, with values generally ranging between 7°C in January and 37°C in July. Rains remain limited, with about 461 mm of precipitation per year. The driest month receives 0 mm in June, versus 83 mm in February for the wettest.
The weather is pleasant to stay to Kermanshah in: April, May, June, July, August, September and October. However, the period when the weather is truly ideal is May, June, August and September.
For hiking and trekking, the best months are April, May and October.
In terms of crowd levels, the quietest periods are in February, while crowding is high in April, May, June, September, December, July and August.