October 21 is statistically one of the best days of the year in Thessaloniki. With minimal rain risk (11%) and pleasant highs of 20°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Thessaloniki right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Thessaloniki
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Connect
As of 2021, Thessaloniki has 5G from Cos...
Safety
High Safety
GPI: 1.838
Thessaloniki Weather Forecast for October 21
"Mild & Comfortable. Expect average highs of 20.2°C. 11% chance of rain."
What to Wear in Thessaloniki in October
Based on historical data for October 21, Thessaloniki typically experiences temperatures between 11.9°C and 20.2°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (11% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Thessaloniki
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.2°C
Daytime Peak
Average Low
11.9°C
Nighttime Low
Feels Like
20.2°C
☀️ Feels accurate
Rain Chance
11%
Avg 0.6mm if it rains
Cloud Cover
50%
Overcast
Pressure
1019.1 hPa
Medium volatility
Thessaloniki Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 95% 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
🔴 53 min to burn
Type III-IV
🟡 80 min to burn
Type V-VI
🟢 133 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
16°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
High
85/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~85
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Thessaloniki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:46
☀️ Noon
12:14
🌇 Sunset
17:41
⏱️ Daylight
10h 54m
Wind Speed
8.4 km/h
Light breeze
Sunshine
8.0 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Thessaloniki
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Thessaloniki
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
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Thessaloniki on October 21 averages 20.2°C with a 11% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Thessaloniki 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 Thessaloniki Worth Visiting on October 21?
Planning a trip to Thessaloniki 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 20.2°C with a 11% historical precipitation risk.
✈️ Travel Logistics: Approximately 85 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Greece, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 21.2°C (swimming pool). Wave conditions are generally lake-like with heights around 0.09m.
📊 Historical Extremes: The hottest October 21 recorded in the last 30 years saw temperatures hit 25.5°C in 2017, while the coldest dropped to 9.3°C in 2021.