Weekly weather forecast: Fronts, calm midweek, late clouds

Fronts and a Low Bring Early-Week Rain Risk

On Tuesday, October 13, a warm front keeps Tokyo sunny with occasional clouds (low 17C, high 25C, 20%), a departing low keeps Osaka sunny (low 17C, high 27C, 30%), a cold front turns Fukuoka cloudy with occasional rain (low 22C, high 28C, 60%), and a cold front turns Sapporo from sunny to cloudy (low 13C, high 21C, 40%). On Wednesday the 14th, the cold front keeps Tokyo sunny (low 19C, high 29C, 20%), clears Fukuoka to sun (low 18C, high 22C, 20%), and brings rain turning to sun in Osaka (low 18C, high 26C, 8mm, 60%), while a departing low brings rain turning cloudy to Sapporo (low 12C, high 23C, 10mm, 80%).

High Pressure Brings a Calm Midweek Stretch

High pressure brings generally settled conditions from Thursday the 15th through Saturday the 17th, though Tokyo and Sapporo briefly have no significant system nearby on Friday the 16th. Osaka stays sunny with occasional clouds throughout (low 15-17C, high 24-26C, 20%), as does Fukuoka (low 16-18C, high 24-28C, 20%). Tokyo is cloudy with occasional sun on the 15th and 16th (low 17-18C, high 22-25C, 30%) before turning cloudy on the 17th under a returning stationary high (low 18C, high 24C, 40%). Sapporo stays cloudy with occasional sun all three days (low 9C, high 15-16C, 30%).

Clouds and Rain Return Late in the Week

Clouds thicken into the weekend. On Sunday the 18th, Tokyo (low 16C, high 24C, 30%) and Osaka (low 16C, high 25C, 30%) are cloudy with occasional sun, Fukuoka turns cloudy (low 19C, high 29C, 40%), and Sapporo stays sunny with occasional clouds (low 8C, high 17C, 20%). On Monday the 19th, rain returns to Fukuoka with brief showers (low 22C, high 29C, 4mm, 60%) and Sapporo (low 12C, high 17C, 4mm, 60%), while Tokyo (low 15C, high 23C, 1mm, 40%) and Osaka (low 19C, high 27C, 6mm, 40%) stay cloudy with lighter rain chances.