Santiago · September
Run in the morning.
Cool month: average high 65°F, low 47°F. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
65° / 47°F
Humidity
70%
Rain days
11/mo
Wind
7 mph
What September feels like in Santiago
Sunrise
06:40
Mid-month average
Sunset
18:34
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
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 Santiago in September
The kit for September in Santiago: a long-sleeve or light jacket for the first mile.
September vs the surrounding months
vs August
+3° avg high
+1 rain days
Santiago in August →
September
65°F avg high
11 rain days
Best: morning
vs October
-5° avg high
+3 rain days
Santiago in October →
Frequently Asked Questions
What is the best time of day to run in Santiago in September?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Santiago in September?+
Average high 65°F, average low 47°F.
How does September compare to surrounding months in Santiago?+
Compared to August (avg high 62°F), September is warmer. Compared to October (avg high 71°F), September is cooler.
Does it rain often in Santiago in September?+
Expect about 11 measurable rain days in September, on average.