December 18 is generally a great time to visit Santorini. While there is a slight chance of rain (17%), showers are usually brief. Expect comfortable 15°C weather. It's a quieter period for Santorini, ideal for those who prefer unhurried sightseeing.
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Essential Travel Info for Santorini
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Connect
There are some local radio stations in S...
Safety
High Safety
GPI: 1.838
Santorini Weather Forecast for December 18
"Mild & Comfortable. Expect average highs of 15.1°C. 17% chance of rain."
What to Wear in Santorini in December
Based on historical data for December 18, Santorini typically experiences temperatures between 12.1°C and 15.1°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (17% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Santorini
Smart Suitcase
- Light Jacket
- Long Pants
Average High
15.1°C
Daytime Peak
Average Low
12.1°C
Nighttime Low
Feels Like
15.1°C
🌤️ Feels accurate
Rain Chance
17%
Avg 0.9mm if it rains
Cloud Cover
55%
Overcast
Pressure
1019.4 hPa
Medium volatility
Santorini 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 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
9.9°C
Dry air
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
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Greece
Flight Traffic
Quiet
22/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~11
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Santorini
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:25
☀️ Noon
12:15
🌇 Sunset
17:06
⏱️ Daylight
9h 40m
Wind Speed
36 km/h
Fresh breeze
Sunshine
7.4 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Santorini
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Santorini
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
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, Santorini on December 18 averages 15.1°C with a 17% precipitation probability. Wedding/Outdoor Event Score: 75/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Santorini Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 24
14.8°C • 13% rain
Score
89
December 25
14.8°C • 10% rain
Score
89
December 19
14.8°C • 16% rain
Score
84
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 18) in other destinations
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📍 Is Santorini Worth Visiting on December 18?
Planning a trip to Santorini on December 18? 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 15.1°C with a 17% historical precipitation risk.
✈️ Travel Logistics: Approximately 11 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 18.6°C (refreshing tonic). Wave conditions are generally surfers only with heights around 1.38m.
📊 Historical Extremes: The hottest December 18 recorded in the last 30 years saw temperatures hit 20.4°C in 2022, while the coldest dropped to 8.5°C in 2021.