Itabashi City Marathon
Itabashi City Marathon race day weather
Cool conditions, slight rain risk
Runners will face temperatures starting at 50°F and rising to 53°F by race's end. With a light wind and humidity at 60%, a slight chance of light rain may occur. Pacing should remain steady, but runners might consider a throwaway layer during pre-race activities due to the cooler feels-like temperature.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Itabashi City Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
About the Itabashi City Marathon
The Itabashi City Marathon runs along the Arakawa riverbed in northern Tokyo, an out-and-back course starting and finishing upstream of Toda Bridge in Itabashi Ward with a turnaround near Arakawa Ohashi Bridge. The course is certified by the Japan Athletics Federation and authenticated by World Athletics as record-eligible, with a flat, minimal-elevation layout along the river levee. The marathon caps entries at 10,000 runners and sets a 7-hour course time limit. The 2027 race is the event's 30th edition.
