Typical Run Score
89
Great
Tokyo · December
Running in Tokyo in December
Typical December running conditions in Tokyo — and a live Run Score so you can see how today compares with the norm.
Avg temperature
44°F
Cool
Avg dew point
33°F
Comfortable
Best window
10 AM–6 PM
Local time
Tokyo · today vs the December normTemperature · dew point · wind · timing
How December compares in Tokyo
December ranks 2nd of 12 months for running in Tokyo, with a typical daytime Run Score of 89 (Great). For reference, the best month is November (score 89) and the hardest is August (score 34). The kindest window in December is typically 10 AM–6 PM. Precipitation falls in roughly 7% of hours this month. Use the live tool below to see how today actually compares with the December norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Tokyo in December: FAQ
Is it good to run in Tokyo in December?
Yes — it's one of the better months to run here. The typical daytime Run Score is 89 (Great), with temperatures around 44°F (7°C) and comfortable dew points. The best window is usually 10 AM–6 PM.
How hot is it for running in Tokyo in December?
Typical temperatures average 44°F (7°C) (Cool) with dew points near 33°F. Dew point — not the thermometer — usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 97+ is Perfect, 80–96 is Great — conditions are actively working in your favour. 65–79 (Good) is solid. 45–64 (Mixed) means at least one factor — usually heat or dew point — is taxing 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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