Mexico City weather in September
September is one of the least pleasant months in Mexico City: highs of 19°C (67°F) and about 148 mm (5.8 in) of rain on average. Nights average 9°C (48°F) and cloud cover 77% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 5th coolest. Compared with August, it is cooler and about as wet; October brings highs of 19°C (67°F) and 64 mm (2.5 in) of rain.
Figures are long-term averages for Mexico City, the largest city in Mexico City. See below for other places.
Is September a good time to visit Mexico City?
least pleasant month Weather score 58/100.
September is one of the least pleasant months for weather in Mexico City. For better conditions, consider Nov–Apr.
Does it rain a lot in Mexico City in September?
Some rain is normal: about 148 mm (5.8 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Mexico City in September?
Days average 19°C (67°F) and nights 9°C (48°F).
Mexico City weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 18°C (64°F) | 3°C (37°F) | 9 mm | 36% | best |
| February | 21°C (69°F) | 4°C (39°F) | 12 mm | 32% | best |
| March | 23°C (73°F) | 6°C (42°F) | 15 mm | 33% | best |
| April | 25°C (77°F) | 8°C (46°F) | 22 mm | 40% | best |
| May | 25°C (77°F) | 9°C (49°F) | 55 mm | 52% | fair |
| June | 23°C (73°F) | 10°C (49°F) | 135 mm | 70% | least pleasant |
| July | 21°C (69°F) | 9°C (49°F) | 154 mm | 76% | least pleasant |
| August | 20°C (69°F) | 9°C (49°F) | 153 mm | 74% | least pleasant |
| September | 19°C (67°F) | 9°C (48°F) | 148 mm | 77% | least pleasant |
| October | 19°C (67°F) | 7°C (45°F) | 64 mm | 57% | fair |
| November | 19°C (65°F) | 5°C (40°F) | 19 mm | 39% | best |
| December | 18°C (65°F) | 4°C (38°F) | 6 mm | 33% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Mexico City in September
Weather can differ a lot within Mexico City: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Mexico City | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Iztapalapa | 19°C (67°F) | 9°C (47°F) | 171 mm | least pleasant |
| Gustavo Adolfo Madero | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Álvaro Obregón | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Coyoacán | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Tlalpan | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Cuauhtémoc | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Xochimilco | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Venustiano Carranza | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Azcapotzalco | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Benito Juárez | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |
| Iztacalco | 19°C (67°F) | 9°C (48°F) | 148 mm | least pleasant |