Peak afternoon
35°C
Hot days are common—and concrete, crowds, and traffic can make the city feel warmer still.
Not just hot. Relentlessly hot.
Why Tokyo summer hits different.
Tokyo’s summer is a triple threat: heavy heat, saturated air, and sudden rain. The forecast temperature tells only part of the story.
Five sticky days
in late July
31°MON
33°TUE
35°WED
34°THU
36°FRI
The bad recipe
Illustrative typical summer conditionsRelative humidity
75%
Humidity slows sweat evaporation, so even a short walk can feel like a workout.
Night low
26°C
Warm nights give homes and bodies little chance to reset before the next day.
And then it pours
Heat is only half the weather story.
Rainy season → thunderstorm season
Early summer’s rainy season leaves the air damp. Later, intense afternoon downpours and thunderstorms can interrupt the heat with very little warning. Carry water, but keep a compact umbrella nearby too.
Make it manageable
Practical, not heroicMove early
Plan long walks and outdoor sights for morning. The hard part of the day often arrives after lunch.
Water + salts
Don’t wait to feel thirsty. Convenience stores stock water and electrolyte drinks everywhere.
Use the indoors
Build in air-conditioned stops: a museum, café, department store, or train ride is a valid reset.
Let weather win
Check heat and rain alerts. Change the plan when conditions turn dangerous—not after.