June 21 is statistically one of the best days of the year in Thessaloniki. With minimal rain risk (4%) and pleasant highs of 31°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 June 21
"Warm & Sunny. Expect average highs of 30.6°C. 4% chance of rain."
What to Wear in Thessaloniki in June
Based on historical data for June 21, Thessaloniki typically experiences temperatures between 20.4°C and 30.6°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (4% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Thessaloniki
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
30.6°C
Daytime Peak
Average Low
20.4°C
Nighttime Low
Feels Like
33.6°C
🔥 Feels warmer
Rain Chance
4%
Avg 0.2mm if it rains
Cloud Cover
23%
Overcast
Pressure
1013.3 hPa
Low volatility
Thessaloniki Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
04:00 - 10:00
16:00 - 20:00
Type I-II
🔴 10 min to burn
Type III-IV
🟡 15 min to burn
Type V-VI
🟢 25 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.4°C
Humid/Sticky
Heat Index
33.6°C
Feels hotter
🙂 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
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
95/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~95
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Thessaloniki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:58
☀️ Noon
12:31
🌇 Sunset
20:03
⏱️ Daylight
15h 5m
Wind Speed
12 km/h
Gentle breeze
Sunshine
13.3 hrs
Direct Sun (Cloud-free)
Humidity
58%
Comfortable
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
🔴 Very 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.
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 June 21 averages 30.6°C with a 4% 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 (June 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Thessaloniki Worth Visiting on June 21?
Planning a trip to Thessaloniki on June 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 30.6°C with a 4% historical precipitation risk.
✈️ Travel Logistics: Approximately 95 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 26.3°C (tropical bath). Wave conditions are generally lake-like with heights around 0.12m.
📊 Historical Extremes: The hottest June 21 recorded in the last 30 years saw temperatures hit 37°C in 2024, while the coldest dropped to 17.6°C in 2022.