Weather in Mexico City for September 2025
In general, the average temperature in Mexico City at the beginning of September is 23 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 21.6 °C by the end of September.
Mexico City experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 266.7 mm.
Temperatures
Rain 🌧️
Mexico City in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  24° | 3  24° | 4 24° | 5 23° | 6 22° | 7  21° |
| 8 22° | 9 20° | 10 24° | 11 24° | 12 24° | 13 25° | 14 24° |
| 15 25° | 16 24° | 17 23° | 18 24° | 19 24° | 20 24° | 21 24° |
| 22 24° | 23 25° | 24  24° | 25  22° | 26 20° | 27 20° | 28 22° |
| 29 21° | 30 22° |
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Temperatures trend during September in Mexico City
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate rain at times | 23° /12° | 5.3 mm | 5 | |
| 2 Sept. | Patchy light rain with thunder | 24° /11° | 8.6 mm | 6 | |
| 3 Sept. | Fog | 24° /12° | 9 mm | 6 | |
| 4 Sept. | Fog | 24° /12° | 5 mm | 6 | |
| 5 Sept. | Fog | 23° /12° | 2.7 mm | 6 | |
| 6 Sept. | Patchy light rain with thunder | 22° /13° | 8 mm | 5 | |
| 7 Sept. | Light rain shower | 21° /12° | 20.2 mm | 5 | |
| 8 Sept. | Fog | 22° /12° | 4.7 mm | 5 | |
| 9 Sept. | Fog | 20° /11° | 0.6 mm | 5 | |
| 10 Sept. | Fog | 24° /11° | 6.7 mm | 5 | |
| 11 Sept. | Mist | 24° /11° | 1.5 mm | 5 | |
| 12 Sept. | Fog | 24° /12° | 7 mm | 5 | |
| 13 Sept. | Mist | 25° /12° | 8 mm | 6 | |
| 14 Sept. | Mist | 24° /13° | 5.5 mm | 6 | |
| 15 Sept. | Fog | 25° /13° | 9 mm | 6 | |
| 16 Sept. | Light rain shower | 24° /13° | 6.9 mm | 6 | |
| 17 Sept. | Light rain shower | 23° /13° | 6 mm | 5 | |
| 18 Sept. | Patchy rain possible | 24° /13° | 4 mm | 5 | |
| 19 Sept. | Fog | 24° /13° | 14.2 mm | 5 | |
| 20 Sept. | Fog | 24° /13° | 7.4 mm | 6 | |
| 21 Sept. | Fog | 24° /13° | 12.3 mm | 6 | |
| 22 Sept. | Patchy rain possible | 24° /13° | 7.6 mm | 6 | |
| 23 Sept. | Fog | 25° /13° | 0.6 mm | 6 | |
| 24 Sept. | Overcast | 24° /12° | 5.9 mm | 6 | |
| 25 Sept. | Cloudy | 22° /11° | 0 mm | 5 | |
| 26 Sept. | Overcast | 20° /11° | 34.9 mm | 5 | |
| 27 Sept. | Mist | 20° /11° | 37.7 mm | 5 | |
| 28 Sept. | Overcast | 22° /12° | 11.3 mm | 5 | |
| 29 Sept. | Patchy rain possible | 21° /12° | 5.8 mm | 5 | |
| 30 Sept. | Patchy rain possible | 22° /12° | 10.4 mm | 5 | |
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Guide for Mexico City in September
In Mexico City, Mexico, September marks the transition from the rainy season to the drier months. At the beginning of the month, Mexico City experiences mild temperatures with an average high of 23° and a low of 12°.
The city is still in the tail end of the rainy season, so occasional showers can be expected, but they are generally short-lived. Humidity levels are relatively high, around 70%, creating a slightly muggy atmosphere.
As the month progresses, the weather in Mexico City becomes drier and more pleasant. By the end of September, the average high temperature reaches around 24°, while the low hovers around 13°. The humidity levels begin to decrease, making the weather more comfortable for outdoor activities.
The city experiences fewer rainy days, and the skies become clearer, allowing for more sunshine.
Overall, September in Mexico City offers a transition from the wet season to the drier period, with mild temperatures and decreasing humidity. It's a great time to explore the city and its attractions without the intense heat of the summer months.
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Mexico City in September - FAQ
September rainfall patterns in Mexico City
UV exposure in Mexico City during September
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Where is Mexico City?Get accurate weather forecasts for Mexico City, located at latitude 19.428 and longitude -99.128. Stay updated with localized weather information tailored for Mexico City.