São Paulo · September
Run in the morning.
Comfortable average high of 78°F, dipping to 58°F at night. Humidity averages 77% — the limiting factor on most runs. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
78° / 58°F
Humidity
77%
Rain days
12/mo
Wind
12 mph
What September feels like in São Paulo
Sunrise
06:02
Mid-month average
Sunset
17:60
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 São Paulo in September
The kit for September in São Paulo: shorts and a short-sleeve are the standard kit.
September vs the surrounding months
vs August
+5° avg high
+3 rain days
São Paulo in August →
September
78°F avg high
12 rain days
Best: morning
vs October
0° avg high
-7 rain days
São Paulo in October →
Frequently Asked Questions
What is the best time of day to run in São Paulo in September?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in São Paulo in September?+
Average high 78°F, average low 58°F.
How does September compare to surrounding months in São Paulo?+
Compared to August (avg high 73°F), September is warmer. Compared to October (avg high 78°F), September is warmer.
Does it rain often in São Paulo in September?+
Expect about 12 measurable rain days in September, on average.