Verdict: Good month
Mexico City Weather in September
September hits the sweet spot in Mexico City — highs around 23°C (73°F), ideal for a full day on foot. It's also the wet side of the calendar: rain falls on about 24 days, so build flexibility into plans. Overall, September is a solid month to visit Mexico City.
Average high
23°C / 73°F
Average low
13°C / 55°F
Rain days
~24
Precipitation
243 mm
What to pack for Mexico City in September
- Summer clothes, plus one light layer for air-con and evenings
- Rain gear is non-negotiable — expect rain on roughly 24 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Mexico City: Mar (28°C / 82°F) · Coolest: Dec (22°C / 72°F) · Wettest: Aug (~28 rain days)
23°
7°
Jan
25°
8°
Feb
28°
10°
Mar
28°
12°
Apr
28°
13°
May
26°
14°
Jun
23°
13°
Jul
23°
13°
Aug
23°
13°
Sep
23°
11°
Oct
24°
9°
Nov
22°
8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)