December 17 is generally a great time to visit London. While there is a slight chance of rain (26%), showers are usually brief. Expect comfortable 8°C weather. As it's peak season for London, we recommend booking your stay well in advance to secure the best rates.
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London Weather Forecast for December 17
"Mild & Comfortable. Expect average highs of 8°C. 26% chance of snow."
What to Wear in London in December
Based on historical data for December 17, London typically experiences temperatures between 3.3°C and 8°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. With a 26% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for London
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
8°C
Daytime Peak
Average Low
3.3°C
Nighttime Low
Feels Like
4.9°C
❄️ Slightly colder
Snow Chance
26%
Avg 1.3mm if it snows
Snowfall
0.1 cm
~26% chance
Pressure
1017.6 hPa
High volatility
London Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% 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
6.3°C
Dry air
Heat Stress
Low
No heat warning
😕 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United Kingdom
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~2,434
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in London
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:02
☀️ Noon
11:57
🌇 Sunset
15:53
⏱️ Daylight
7h 50m
Wind Speed
19.5 km/h
Gentle breeze
Sunshine
3.1 hrs
Direct Sun (Cloud-free)
Humidity
89%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for London
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in London
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
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, London on December 17 averages 8°C with a 26% precipitation probability. Wedding/Outdoor Event Score: 55/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
London 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
9°C • 25% rain
Score
58
December 21
8.8°C • 31% rain
Score
57
December 23
9.1°C • 25% rain
Score
57
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 17) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is London Worth Visiting on December 17?
Planning a trip to London on December 17? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 8°C with a 26% historical precipitation risk.
✈️ Travel Logistics: Approximately 2,434 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 8 vaccinations are recommended for United Kingdom, including COVID-19.
📊 Historical Extremes: The hottest December 17 recorded in the last 30 years saw temperatures hit 14.3°C in 2015, while the coldest dropped to -4.5°C in 2022.