Mexico City · September
Run in the morning.
Comfortable average high of 72°F, dipping to 55°F at night. Humidity averages 77% — the limiting factor on most runs. Expect 25 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
72° / 55°F
Humidity
77%
Rain days
25/mo
Wind
9 mph
What September feels like in Mexico City
Sunrise
06:24
Mid-month average
Sunset
18:38
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 Mexico City in September
The kit for September in Mexico City: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-1° avg high
-4 rain days
Mexico City in August →
September
72°F avg high
25 rain days
Best: morning
vs October
0° avg high
+5 rain days
Mexico City in October →
Frequently Asked Questions
What is the best time of day to run in Mexico City in September?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Mexico City in September?+
Average high 72°F, average low 55°F.
How does September compare to surrounding months in Mexico City?+
Compared to August (avg high 73°F), September is cooler. Compared to October (avg high 72°F), September is cooler.
Does it rain often in Mexico City in September?+
Expect about 25 measurable rain days in September, on average.