Temperatures and clothing Hokkaido's summer months are from July to September. The average temperature in Sapporo is about 21 degrees Celsius. There is little humidity and it is comfortable. It gets cold in the mornings and evenings, so long sleeves are recommended. It is a good protection against insects when going to the mountain forests. Ningle Terrace (Furano City) This shopping road is lined with log houses. Log houses with the warmth of wood.