October 21 sees frequent showers in Cancún. Historical data shows a 49% chance of rain, so pack accordingly. Temperatures average 28°C. It's a lively time to explore Cancún, with most attractions operating at full capacity.
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Essential Travel Info for Cancún
Currency
MXN
$ Mexican peso
Language
Spanish
Driving
Right side
Connect
High-speed wireless internet (5G) is wid...
Safety
Travel Precautions
GPI: 2.612
Cancún Weather Forecast for October 21
"Warm & Sunny. Expect average highs of 28.3°C. 49% chance of rain."
What to Wear in Cancún in October
Based on historical data for October 21, Cancún typically experiences temperatures between 24.4°C and 28.3°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 49% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Cancún
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
28.3°C
Daytime Peak
Average Low
24.4°C
Nighttime Low
Feels Like
32.9°C
🔥 Feels warmer
Rain Chance
49%
Avg 4.5mm if it rains
Cloud Cover
56%
Light drizzle
Pressure
1012.9 hPa
Medium volatility
Cancún 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 15 for extended outdoor time
Type I-II
🔴 47 min to burn
Type III-IV
🟡 71 min to burn
Type V-VI
🟢 118 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
24.5°C
Humid/Sticky
Heat Index
32.9°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Mexico
Flight Traffic
Busy
66/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~193
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Cancún
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:46
☀️ Noon
12:33
🌇 Sunset
18:20
⏱️ Daylight
11h 33m
Wind Speed
16.6 km/h
Gentle breeze
Sunshine
9.4 hrs
Direct Sun (Cloud-free)
Humidity
80%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Cancún
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 Cancún
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Cancún on October 21 averages 28.3°C with a 49% precipitation probability. Wedding/Outdoor Event Score: 82/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Cancún Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
October 28
28.3°C • 30% rain
Score
92
October 27
28.4°C • 31% rain
Score
91
October 25
28.4°C • 35% rain
Score
89
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Cancún Worth Visiting on October 21?
Planning a trip to Cancún on October 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.3°C with a 49% historical precipitation risk.
✈️ Travel Logistics: Approximately 193 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 29.2°C (hot soup). Wave conditions are generally surfers only with heights around 1.26m.
📊 Historical Extremes: The hottest October 21 recorded in the last 30 years saw temperatures hit 31.1°C in 2025, while the coldest dropped to 21.6°C in 2022.