October 21 is statistically one of the best days of the year in Athens. With minimal rain risk (6%) and pleasant highs of 23°C, it's ideal for outdoor adventures. It's a great middle-ground for visiting Athens—enough activity to feel the pulse, but no overwhelming lines.
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Essential Travel Info for Athens
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Connect
As of Sept 2021, Athens has 5G from Cosm...
Safety
High Safety
GPI: 1.838
Athens Weather Forecast for October 21
"Mild & Comfortable. Expect average highs of 22.6°C. 6% chance of rain."
What to Wear in Athens in October
Based on historical data for October 21, Athens typically experiences temperatures between 14.6°C and 22.6°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (6% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Athens
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
22.6°C
Daytime Peak
Average Low
14.6°C
Nighttime Low
Feels Like
23°C
☀️ Feels accurate
Rain Chance
6%
Avg 0.2mm if it rains
Cloud Cover
39%
Overcast
Pressure
1017.8 hPa
Medium volatility
Athens Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% 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
17.1°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Greece
Flight Traffic
Moderate
55/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~457
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Athens
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:40
☀️ Noon
12:10
🌇 Sunset
17:41
⏱️ Daylight
11h 1m
Wind Speed
13.2 km/h
Gentle breeze
Sunshine
8.9 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Athens
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Athens
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Athens on October 21 averages 22.6°C with a 6% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Athens Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (October 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Athens Worth Visiting on October 21?
Planning a trip to Athens on October 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 22.6°C with a 6% historical precipitation risk.
✈️ Travel Logistics: Approximately 457 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 6 vaccinations are recommended for Greece, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 23.7°C (swimming pool). Wave conditions are generally lake-like with heights around 0.23m.
📊 Historical Extremes: The hottest October 21 recorded in the last 30 years saw temperatures hit 27.3°C in 2019, while the coldest dropped to 10.6°C in 2021.