April 21 is generally a great time to visit Thessaloniki. While there is a slight chance of rain (22%), showers are usually brief. Expect comfortable 19°C weather. You'll find plenty of company in Thessaloniki this month as tourism activity remains quite robust. Note: April 21 is Easter Monday in Thessaloniki, so expect special events, closures, and festive atmosphere.
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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 April 21
"Mild & Comfortable. Expect average highs of 19.3°C. 22% chance of rain."
What to Wear in Thessaloniki in April
Based on historical data for April 21, Thessaloniki typically experiences temperatures between 10°C and 19.3°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (22% 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
19.3°C
Daytime Peak
Average Low
10°C
Nighttime Low
Feels Like
19.3°C
🌤️ Feels accurate
Rain Chance
22%
Avg 1.1mm if it rains
Cloud Cover
48%
Overcast
Pressure
1013.7 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 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 17 min to burn
Type III-IV
🟡 26 min to burn
Type V-VI
🟢 43 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
13.7°C
Pleasant
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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Holiday
Easter Monday
Flight Traffic
Busy
76/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~76
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Thessaloniki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:42
☀️ Noon
12:28
🌇 Sunset
19:13
⏱️ Daylight
13h 31m
Wind Speed
12.1 km/h
Gentle breeze
Sunshine
10.8 hrs
Direct Sun (Cloud-free)
Humidity
70%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Thessaloniki
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 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 April 21 averages 19.3°C with a 22% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
April 26
20.3°C • 15% rain
Score
100
April 27
20.6°C • 13% rain
Score
100
April 28
20.9°C • 14% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 21) in other destinations
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📍 Is Thessaloniki Worth Visiting on April 21?
Planning a trip to Thessaloniki on April 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 19.3°C with a 22% historical precipitation risk.
🎉 Local Event: The date coincides with Easter Monday, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 76 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 17.1°C (refreshing tonic). Wave conditions are generally lake-like with heights around 0.18m.
📊 Historical Extremes: The hottest April 21 recorded in the last 30 years saw temperatures hit 22.6°C in 2025, while the coldest dropped to 5.6°C in 2017.