It’s Tokyo Marathon weekend, and the main question right now is about the weather. Monday’s Osaka Marathon had freezing cold temperatures and snow over the last quarter of the race, which still had record-breaking performances. Right now Tokyo looks to be in the mid-teens most of the race and could hit 20˚ by the end. Cloud cover will be critical, and what’s in the forecast right now looks like
Source: japanrunningnews.blogspot.com