Weekly Weather Forecast: Midweek Rain, Calmer by the 15th

Sapporo and Fukuoka: Wet Midweek, Easing Later

Sapporo and Fukuoka start mostly dry, turn wet midweek, then ease Thursday the 15th under high pressure. Monday, October 12: Sapporo 20% chance, Fukuoka 30% near a trough. A low-pressure system near Fukuoka Tuesday the 13th lifts it to 60%. Wednesday the 14th: that system near Sapporo pulls away northeast while its chance holds at 80%; a cold front keeps Fukuoka at 40%. High pressure eases both Thursday the 15th, Sapporo to 40%, Fukuoka to 20%. No system nearby Friday the 16th keeps both near 30-40%. Over the weekend, Fukuoka nears 28C and Sapporo 17-18C, both near 30%.

Tokyo and Osaka: Mostly Dry, Brief Midweek Rain

Monday, October 12: a stationary front crosses Tokyo, sunny at 20%; no system nearby Osaka, also sunny at 20%. Tuesday the 13th: a warm front crosses Tokyo, still 20%; a low-pressure system near Osaka holds 30%. Wednesday the 14th: a cold front crosses both, Osaka cloudy with brief rain at 60%, Tokyo cloudy at 40%. High pressure eases both Thursday the 15th to 20-30%; Friday the 16th stays near 30%. Highs reach 24-25C Tokyo, 26-27C Osaka over the weekend, near 30-40%.

This Week at a Glance: Coolest to Mildest

This week splits the four cities into cooler and milder groups: Sapporo stays coolest, lows near 8C by the 16th and 18th; Fukuoka and Osaka stay mildest, lows no lower than 15C, highs to 28C. Wednesday the 14th: a cold front crosses Tokyo and Osaka while the system near Sapporo pulls away northeast, Sapporo's chance reaches 80%, Osaka 60%, Tokyo 40%; Fukuoka's chance had already peaked at 60% Tuesday the 13th under its own low-pressure system. High pressure settles near all four cities Thursday the 15th, easing chances to 20-40%. No system nearby any city Friday the 16th, highs 16C Sapporo to 26C Fukuoka and Osaka.