Typical Run Score
79
Good
Tokyo · January
Running in Tokyo in January
Typical January running conditions in Tokyo — and a live Run Score so you can see how today compares with the norm.
Avg temperature
40°F
Cold
Avg dew point
27°F
Comfortable
Best window
10 AM–6 PM
Local time
Tokyo · today vs the January normTemperature · dew point · wind · timing
How January compares in Tokyo
January ranks 6th of 12 months for running in Tokyo, with a typical daytime Run Score of 79 (Good). For reference, the best month is November (score 89) and the hardest is August (score 34). The kindest window in January 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 January norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Tokyo in January: FAQ
Is it good to run in Tokyo in January?
Generally yes, with sensible timing. The typical daytime Run Score is 79 (Good), with temperatures around 40°F (4°C) and comfortable dew points. The best window is usually 10 AM–6 PM.
How hot is it for running in Tokyo in January?
Typical temperatures average 40°F (4°C) (Cold) with dew points near 27°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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