Weather: Tokyo Half Marathon
Historical weather data for race day in January. Use this to plan your race strategy, clothing, and hydration.
10°C
Temperature
Range: 5°C – 15°C
55%
Humidity
Low — comfortable
25%
Rain Chance
Low chance of rain
January
Typical race month
Usually on a Sunday
Conditions
Cool, crisp winter weather typical of Tokyo in January. Occasional rain but generally clear with low humidity, making it ideal running conditions.
What to Wear
Light gloves
Useful at the start, tuck away later
Long sleeve or arm warmers
Versatile for cool starts
Hydration Strategy
Before the Race
Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.
During the Race
Drink at aid stations every 3-4km. Alternate water and sports drink.
After the Race
Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.
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