Tokyo · September
Run in the morning.
Comfortable average high of 80°F, dipping to 68°F at night. Humidity averages 81% — the limiting factor on most runs. Expect 19 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
80° / 68°F
Humidity
81%
Rain days
19/mo
Wind
14 mph
What September feels like in Tokyo
Sunrise
05:24
Mid-month average
Sunset
17:48
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
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Tokyo in September
The kit for September in Tokyo: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-7° avg high
+1 rain days
Tokyo in August →
September
80°F avg high
19 rain days
Best: morning
vs October
+10° avg high
+4 rain days
Tokyo in October →
Frequently Asked Questions
What is the best time of day to run in Tokyo in September?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Tokyo in September?+
Average high 80°F, average low 68°F.
How does September compare to surrounding months in Tokyo?+
Compared to August (avg high 88°F), September is cooler. Compared to October (avg high 70°F), September is warmer.
Does it rain often in Tokyo in September?+
Expect about 19 measurable rain days in September, on average.