September 21 sees frequent showers in Mexico City. Historical data shows a 45% chance of rain, so pack accordingly. Temperatures average 22°C. Expect a bustling atmosphere in Mexico City right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Mexico City
Currency
MXN
$ Mexican peso
Language
Spanish
Driving
Right side
Connect
If someone is calling you the country co...
Safety
Travel Precautions
GPI: 2.612
Mexico City Weather Forecast for September 21
"Mild & Comfortable. Expect average highs of 21.9°C. 45% chance of rain."
What to Wear in Mexico City in September
Based on historical data for September 21, Mexico City typically experiences temperatures between 12.2°C and 21.9°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 45% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Mexico City
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
21.9°C
Daytime Peak
Average Low
12.2°C
Nighttime Low
Feels Like
22.2°C
☀️ Feels accurate
Rain Chance
45%
Avg 2.3mm if it rains
Cloud Cover
74%
Light drizzle
Pressure
1016.2 hPa
Low volatility
Mexico City Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 80% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 24 min to burn
Type III-IV
🟡 36 min to burn
Type V-VI
🟢 60 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
17.7°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Mexico
Flight Traffic
High
81/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~368
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Mexico City
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:26
☀️ Noon
12:30
🌇 Sunset
18:35
⏱️ Daylight
12h 8m
Wind Speed
15.6 km/h
Gentle breeze
Sunshine
9.9 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Mexico City
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Mexico City
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Unhealthy for sensitive groups. Consider wearing a mask outdoors.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Volcanic Activity
Nearest: Popocatépetl
70km away
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Mexico City on September 21 averages 21.9°C with a 45% precipitation probability. Wedding/Outdoor Event Score: 85/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Mexico City Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 21) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Mexico City Worth Visiting on September 21?
Planning a trip to Mexico City on September 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 21.9°C with a 45% historical precipitation risk.
✈️ Travel Logistics: Approximately 368 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for Mexico, including COVID-19.
📊 Historical Extremes: The hottest September 21 recorded in the last 30 years saw temperatures hit 25.3°C in 2023, while the coldest dropped to 11.4°C in 2016.