Typical Run Score
55
Fair
Tokyo · September
Running in Tokyo in September
Typical September running conditions in Tokyo, and a live Run Score so you can see how today compares with the norm.
Avg temperature
78°F
Hot
Avg dew point
71°F
Very humid
Best window
6–8 AM
Local time
Tokyo · today vs the September normTemperature · dew point · wind · timing
How September compares in Tokyo
September ranks 10th of 12 months for running in Tokyo, with a typical daytime Run Score of 55 (Fair). For reference, the best month is November (score 89) and the hardest is August (score 34). The kindest window in September is typically 6–8 AM. Precipitation falls in roughly 20% of hours this month. Use the live tool below to see how today actually compares with the September norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Tokyo in September: FAQ
Is it good to run in Tokyo in September?
It's runnable, but at least one factor (usually heat or dew point) is working against you. The typical daytime Run Score is 55 (Fair), with temperatures around 78°F (25°C) and very humid dew points. The best window is usually 6–8 AM.
How hot is it for running in Tokyo in September?
Typical temperatures average 78°F (25°C) (Hot) with dew points near 71°F. Dew point (not the thermometer) usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 80–100 is Great (97+ earns a gold star for near-perfect conditions). 65–79 (Good) is solid. 45–64 (Fair) means at least one factor (usually heat or dew point) is slowing you. Below 45 (Poor), expect a noticeably harder effort or hold back for safety.
Why does dew point matter more than temperature?
Your body cools by evaporating sweat. When the dew point climbs above roughly 60°F, the air is too saturated for sweat to evaporate efficiently, so heat builds up even if the thermometer looks reasonable. That's why a 70°F muggy morning can feel harder than a dry 80°F afternoon.
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