Click on a day for an hourly weather forecast
The temperatures in Mexico City in September are comfortable with low of 12°C and and high up to 22°C.
There’s going to be many days of rain during the month of September in Mexico City.
Mexico City should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Mexico City in September 2025.
If you’re planning to visit Mexico City in the near future, we highly recommend that you review the 14 day weather forecast for Mexico City before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 21° / 8° | 2 | 30 | 0 | 24 mm | Good | Mexico City in January |
| February | 24° / 10° | 1 | 27 | 0 | 19 mm | Perfect | Mexico City in February |
| March | 26° / 11° | 1 | 30 | 0 | 36 mm | Perfect | Mexico City in March |
| April | 27° / 13° | 3 | 27 | 0 | 62 mm | Perfect | Mexico City in April |
| May | 27° / 14° | 7 | 25 | 0 | 191 mm | Good | Mexico City in May |
| June | 24° / 13° | 16 | 14 | 0 | 397 mm | Good | Mexico City in June |
| July | 22° / 12° | 22 | 9 | 0 | 497 mm | Ok | Mexico City in July |
| August | 22° / 11° | 21 | 10 | 0 | 455 mm | Ok | Mexico City in August |
| September | 22° / 12° | 18 | 12 | 0 | 420 mm | Ok | Mexico City in September |
| October | 22° / 10° | 8 | 23 | 0 | 171 mm | Ok | Mexico City in October |
| November | 22° / 9° | 1 | 29 | 0 | 41 mm | Good | Mexico City in November |
| December | 22° / 9° | 0 | 31 | 0 | 9 mm | Good | Mexico City in December |