December 29 is generally a great time to visit Siena. While there is a slight chance of rain (23%), showers are usually brief. Expect comfortable 9°C weather. It's a lively time to explore Siena, with most attractions operating at full capacity.
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Essential Travel Info for Siena
Currency
EUR
€ Euro
Language
Italian
+1 more
Driving
Right side
Safety
High Safety
GPI: 1.643
Siena Weather Forecast for December 29
"Mild & Comfortable. Expect average highs of 9.3°C. 23% chance of snow."
What to Wear in Siena in December
Based on historical data for December 29, Siena typically experiences temperatures between 2°C and 9.3°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (23% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Siena
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
9.3°C
Daytime Peak
Average Low
2°C
Nighttime Low
Feels Like
7.5°C
❄️ Minor difference
Snow Chance
23%
Avg 1.6mm if it snows
Snowfall
0.1 cm
~23% chance
Pressure
1018.7 hPa
High volatility
Siena Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 97% 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
6.7°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 Italy
Flight Traffic
Busy
64/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~41
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Siena
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:47
☀️ Noon
12:17
🌇 Sunset
16:47
⏱️ Daylight
8h 59m
Wind Speed
11.6 km/h
Light breeze
Sunshine
5.6 hrs
Direct Sun (Cloud-free)
Humidity
84%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Siena
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Siena
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
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 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, Siena on December 29 averages 9.3°C with a 23% precipitation probability. Wedding/Outdoor Event Score: 62/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Siena 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
10.5°C • 21% rain
Score
69
December 23
10.3°C • 21% rain
Score
68
December 25
10.3°C • 24% rain
Score
67
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 29) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Siena Worth Visiting on December 29?
Planning a trip to Siena on December 29? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 9.3°C with a 23% historical precipitation risk.
✈️ Travel Logistics: Approximately 41 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Italy, including COVID-19.
📊 Historical Extremes: The hottest December 29 recorded in the last 30 years saw temperatures hit 14.2°C in 2022, while the coldest dropped to -1.8°C in 2016.