City Average Daytime High Average Nighttime Low Rainy/Snowy Days Early Month Late Month Sunny Days Early Month Late Month Sapporo 8 C (46 F) 1 C (34 F) 45% 45% 40% 35% Tokyo 17 C (63 F) 10 C (50 F) 25% 20% 55% 60% Takayama 13 C (55 F) 2 C (36 F) 35% 35% 45% 40% Osaka 17 C (63 F) 10 C (50 F) 20% 20% 60% 60% Fukuoka 18 C (64 F) 10 C (50 F)