Monthly climate guide
Mexico City weather in September
With highs near 20°C (68°F) and lows around 10°C (49°F), September feels mild in Mexico City. Rainfall averages about 140 mm (wet) and the sky is often cloudy. Daytime highs are about the same as August and about the same as October.
What stands out in September
- Check the hourly forecast before heading to Zócalo — showers are likely.
- Rain is above Mexico City's usual level, by about 111%.
- Just 60 km apart, but Mexico City runs about 2°C cooler than Cuernavaca this month.
- This is rainy-season territory in Mexico City: short, heavy downpours are typical.
Avg high
20°C
68°F
Avg low
10°C
49°F
Rainfall
140 mm
wet
Humidity
82%
relative
Sky
75%
cloud · often cloudy
Mexico City weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 19°C / 66°F | 4°C / 39°F | 6 mm | 60% | 35% |
| February | 22°C / 71°F | 6°C / 42°F | 8 mm | 54% | 31% |
| March | 24°C / 75°F | 7°C / 44°F | 19 mm | 51% | 33% |
| April | 26°C / 79°F | 9°C / 48°F | 23 mm | 46% | 41% |
| May | 26°C / 79°F | 10°C / 50°F | 61 mm | 55% | 52% |
| June | 23°C / 74°F | 11°C / 51°F | 141 mm | 70% | 68% |
| July | 21°C / 70°F | 10°C / 50°F | 149 mm | 77% | 75% |
| August | 21°C / 70°F | 10°C / 50°F | 155 mm | 79% | 73% |
| September | 20°C / 68°F | 10°C / 49°F | 140 mm | 82% | 75% |
| October | 20°C / 68°F | 8°C / 46°F | 62 mm | 77% | 56% |
| November | 20°C / 68°F | 6°C / 43°F | 24 mm | 72% | 43% |
| December | 20°C / 68°F | 5°C / 42°F | 7 mm | 65% | 33% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Mexico City?
Our Mexico City guide recommends: March to May, in the dry season before the June–October rains, with warm days and cool evenings due to the altitude.
The city sits at over 2,200m altitude — take it easy on your first day or two, especially with alcohol or strenuous activity.
Best time to visit Mexico City →Other Mexico cities in September
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Mexico City weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/mexico/mexico-city/september
<a href="https://weathercompare.eu/weather/mexico/mexico-city/september">Mexico City weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/mexico/mexico-city" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Mexico City weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/mexico/mexico-city/september">Mexico City weather in September</a> – WeatherCompare</p>
Mexico City in September: quick answers
Is September a good time to visit Mexico City?
September is one of the wetter months in Mexico City, with about 140 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Mexico City in September?
Average highs are about 20°C (68°F) and average lows about 10°C (49°F), based on 10 years of daily data.
Does it rain a lot in Mexico City in September?
Mexico City typically gets around 140 mm of rain in September — wet.
When is the best time to visit Mexico City?
March to May, in the dry season before the June–October rains, with warm days and cool evenings due to the altitude.
Figures are long-term averages for the area around Mexico City (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.