Osaka · September
Run in the morning.
Comfortable average high of 83°F, dipping to 70°F at night. Humidity averages 77% — the limiting factor on most runs. Expect 17 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
83° / 70°F
Humidity
77%
Rain days
17/mo
Wind
12 mph
What September feels like in Osaka
Sunrise
05:41
Mid-month average
Sunset
18:05
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 Osaka in September
The kit for September in Osaka: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-6° avg high
-1 rain days
Osaka in August →
September
83°F avg high
17 rain days
Best: morning
vs October
+11° avg high
+5 rain days
Osaka in October →
Frequently Asked Questions
What is the best time of day to run in Osaka in September?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Osaka in September?+
Average high 83°F, average low 70°F.
How does September compare to surrounding months in Osaka?+
Compared to August (avg high 89°F), September is cooler. Compared to October (avg high 72°F), September is warmer.
Does it rain often in Osaka in September?+
Expect about 17 measurable rain days in September, on average.