Mexico City in September
In September, Mexico City averages 23°C (73°F) during the day and 12°C (54°F) at night, with frequent rain — about 18 days of the month see precipitation (156 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in Mexico City, with some rain to plan around.
How September compares to the rest of the year in Mexico City
September is in the middle of the year for warmth in Mexico City (8th of 12) and one of the wettest months (3rd of 12). Daytime temperature runs 1°C below the annual average (24°C). September runs roughly the same as August (23°C) and stays flat into October.
September sunrise & sunset in Mexico City
Times shown for Mexico City local time (America/Mexico_City), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Mexico City — September
Golden-hour and blue-hour windows for the 15th of September, in Mexico City's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Mexico City in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Mexico City's popularity.
Crowds & pricing — September in Mexico City
Mexico City is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Mexico City
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Mexico City in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 22°C / 72°F | 6°C / 43°F | 8 mm | 2 | — |
| February | 24°C / 75°F | 7°C / 45°F | 5 mm | 2 | — |
| March | 26°C / 79°F | 9°C / 48°F | 13 mm | 3 | — |
| April | 27°C / 81°F | 11°C / 52°F | 23 mm | 5 | — |
| May | 27°C / 81°F | 12°C / 54°F | 53 mm | 9 | — |
| June | 25°C / 77°F | 13°C / 55°F | 119 mm | 16 | — |
| July | 23°C / 73°F | 12°C / 54°F | 175 mm | 19 | — |
| August | 23°C / 73°F | 12°C / 54°F | 173 mm | 18 | — |
| September | 23°C / 73°F | 12°C / 54°F | 156 mm | 18 | — |
| October | 23°C / 73°F | 10°C / 50°F | 51 mm | 9 | — |
| November | 22°C / 72°F | 8°C / 46°F | 13 mm | 3 | — |
| December | 22°C / 72°F | 6°C / 43°F | 8 mm | 2 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Mexico City in September →
Frequently asked questions
How hot is Mexico City in September?
In September, Mexico City averages a high of 23°C (73°F) and a low of 12°C (54°F) — generally mild and pleasant.
Does it rain a lot in Mexico City in September?
September is quite rainy in Mexico City, with about 18 rainy days on average.
Is September a good time to visit Mexico City?
September is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Mexico City in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Mexico City for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.