September 12 sees frequent showers in Cozumel. Historical data shows a 50% chance of rain, so pack accordingly. Temperatures average 30°C. Cozumel is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Cozumel
Currency
MXN
$ Mexican peso
Language
Spanish
Driving
Right side
Safety
Travel Precautions
GPI: 2.612
Cozumel Weather Forecast for September 12
"Warm & Sunny. Expect average highs of 29.8°C. 50% chance of rain."
What to Wear in Cozumel in September
Based on historical data for September 12, Cozumel typically experiences temperatures between 26.3°C and 29.8°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 50% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Cozumel
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
29.8°C
Daytime Peak
Average Low
26.3°C
Nighttime Low
Feels Like
37.3°C
🔥 Heat index effect
Rain Chance
50%
Avg 3.8mm if it rains
Cloud Cover
65%
Light drizzle
Pressure
1012.2 hPa
Low volatility
Cozumel Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% 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
🔴 26 min to burn
Type III-IV
🟡 39 min to burn
Type V-VI
🟢 65 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
26.2°C
Humid/Sticky
Heat Index
37.3°C
Feels hotter
😕 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Mexico
Flight Traffic
High
80/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~8
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Cozumel
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:35
☀️ Noon
12:45
🌇 Sunset
18:55
⏱️ Daylight
12h 19m
Wind Speed
21 km/h
Moderate wind
Sunshine
10.4 hrs
Direct Sun (Cloud-free)
Humidity
81%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Cozumel
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Cozumel
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.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Cozumel on September 12 averages 29.8°C with a 50% precipitation probability. Wedding/Outdoor Event Score: 77/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Cozumel Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 6
30°C • 36% rain
Score
85
September 7
30°C • 36% rain
Score
84
September 5
30°C • 38% rain
Score
83
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 12) in other destinations
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📍 Is Cozumel Worth Visiting on September 12?
Planning a trip to Cozumel on September 12? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 29.8°C with a 50% historical precipitation risk.
✈️ Travel Logistics: Approximately 8 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for Mexico, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 30.3°C (hot soup). Wave conditions are generally lake-like with heights around 0.32m.
📊 Historical Extremes: The hottest September 12 recorded in the last 30 years saw temperatures hit 32.1°C in 2023, while the coldest dropped to 23.9°C in 2022.