Japan Week Ahead: Early Sun, Midweek Rain, Later Cloud

Early-Week Sun Gives Way to Midweek Rain Signs

Tokyo, Osaka, Sapporo and Fukuoka open the week with sun and cloud before turning wetter midweek, then see cloud return later. On Friday, October 16, a nearby trough leaves Tokyo and Osaka near 25C at 20-30%, Sapporo's rain turns sunny near 16C at 60%, and Fukuoka is cloudy with sun near 25C at 30%. On Saturday the 17th, with no system nearby, all turn sunny: Tokyo 24C, Osaka 26C, Fukuoka 27C, Sapporo 15C, near 20%. On Sunday the 18th, high pressure moves away to the east of Tokyo, Osaka and Sapporo, while a cold front is expected to extend across Fukuoka: Tokyo 23C, Osaka 27C, Sapporo 17C, Fukuoka 29C, near 20-30%.

Rain Chances Vary by City Through Monday and Tuesday

Rain chances vary by city across the week, each reaching its own peak as a cold front extends across the region midweek. On Monday, October 19, the front extends across all four cities: Osaka peaks at 70% with rain near 28C, Sapporo and Fukuoka reach 60% with brief rain near 20C and 27C, while Tokyo stays lower at 40% near 26C. On Tuesday the 20th, Tokyo climbs to 60% with brief rain near 24C, its highest point, while Osaka eases to 40% near 29C under a nearly stationary high, Fukuoka holds 40% near 28C as a trough moves west, and Sapporo falls to 20% near 17C.

Cloud Lingers Midweek; Osaka and Fukuoka See Late Sun

Cloud dominates Tokyo, Osaka, Sapporo and Fukuoka through the back half of the week, though Osaka and Fukuoka regain some sun by Thursday. On Wednesday, October 21, all four stay cloudy: Tokyo has occasional sun near 29C at 30%, Osaka is cloudy near 27C at 40%, Fukuoka is cloudy near 25C at 40%, and Sapporo is cloudy near 17C with a low of 11C at 40%. On Thursday the 22nd, Osaka and Fukuoka turn sunny with occasional cloud near 23C and 21C at 20%, while Tokyo stays cloudy near 23C at 40% and Sapporo stays cloudy near 14C with a low of 9C at 40%.