Tokyo · August
Run in the pre-dawn.
Average high is 88°F with a 75°F overnight low. Humidity averages 80% — the limiting factor on most runs. Expect 18 rain days — plan around the radar. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
Avg high / low
88° / 75°F
Humidity
80%
Rain days
18/mo
Wind
15 mph
What August feels like in Tokyo
Sunrise
05:00
Mid-month average
Sunset
18:29
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Heat peaks here. Skip unless you've got shade and pace tolerance.
Evening
Cools off after sunset but still warm. Good for easy efforts; avoid hard intervals if you're chasing pace.
What to wear running in Tokyo in August
The kit for August in Tokyo: light, breathable, and moisture-wicking — singlet or short-sleeve only, a wind-blocking layer for exposed routes, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
+2° avg high
-1 rain days
Tokyo in July →
August
88°F avg high
18 rain days
Best: pre-dawn
vs September
+8° avg high
0 rain days
Tokyo in September →
Frequently Asked Questions
What is the best time of day to run in Tokyo in August?+
Pre-dawn. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
What's the average temperature in Tokyo in August?+
Average high 88°F, average low 75°F.
How does August compare to surrounding months in Tokyo?+
Compared to July (avg high 85°F), August is warmer. Compared to September (avg high 80°F), August is warmer.
Does it rain often in Tokyo in August?+
Expect about 18 measurable rain days in August, on average.