City Average Daytime High Average Nighttime Low Rainy/Snowy Days Early Month Late Month Sunny Days Early Month Late Month Sapporo 25 C (77 F) 17 C (63 F) 25% 25% 40% 45% Tokyo 29 C (84 F) 23 C (73 F) 35% 30% 30% 40% Takayama 29 C (84 F) 19 C (66 F) 55% 40% 35% 50% Osaka 31 C (88 F) 24 C (75 F) 40% 25% 45% 60% Fukuoka 31 C (88 F) 24 C (75 F)