January 18 sees frequent showers in San Sebastian. Historical data shows a 41% chance of rain, so pack accordingly. Temperatures average 11°C. San Sebastian is very peaceful this time of year, perfect for a secluded and budget-friendly getaway.
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Essential Travel Info for San Sebastian
Currency
EUR
€ Euro
Language
Spanish
+3 more
Driving
Right side
Safety
High Safety
GPI: 1.603
San Sebastian Weather Forecast for January 18
"Mild & Comfortable. Expect average highs of 11.4°C. 41% chance of snow."
What to Wear in San Sebastian in January
Based on historical data for January 18, San Sebastian typically experiences temperatures between 6°C and 11.4°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 41% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for San Sebastian
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
- Umbrella
Average High
11.4°C
Daytime Peak
Average Low
6°C
Nighttime Low
Feels Like
9.9°C
❄️ Minor difference
Snow Chance
41%
Avg 4.3mm if it snows
Snowfall
0.2 cm
~41% chance
Pressure
1020.4 hPa
High volatility
San Sebastian Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 267 min to burn
Type III-IV
🟡 401 min to burn
Type V-VI
🟢 668 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
7.9°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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Spain
Flight Traffic
Minimal
17/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~5
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Sebastian
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:37
☀️ Noon
13:19
🌇 Sunset
18:01
⏱️ Daylight
9h 24m
Wind Speed
20.9 km/h
Moderate wind
Sunshine
5.2 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Sebastian
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in San Sebastian
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Sebastian on January 18 averages 11.4°C with a 41% precipitation probability. Wedding/Outdoor Event Score: 67/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
San Sebastian Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
January 14
11.8°C • 30% rain
Score
74
January 13
11.6°C • 33% rain
Score
72
January 15
11.9°C • 34% rain
Score
72
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 18) in other destinations
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📍 Is San Sebastian Worth Visiting on January 18?
Planning a trip to San Sebastian on January 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 11.4°C with a 41% historical precipitation risk.
✈️ Travel Logistics: Approximately 5 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Spain, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 13.7°C (polar plunge). Wave conditions are generally surfers only with heights around 1.61m.
📊 Historical Extremes: The hottest January 18 recorded in the last 30 years saw temperatures hit 18°C in 2024, while the coldest dropped to -1.3°C in 2017.