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.
Expect significant rainfall in Mexico City during September, with an average of 17 rainy days.
Is September a good time to visit Mexico City? check out the best time to travel to Mexico City page.
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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.
Mexico City in September - FAQ
What to pack to Mexico City in September?
As you prepare for your trip to Mexico City in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Mexico City, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Mexico City
UV exposure in Mexico City during September
Quick links
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.