January 1 is generally a great time to visit Siena. While there is a slight chance of rain (24%), showers are usually brief. Expect comfortable 10°C weather. It's a great middle-ground for visiting Siena—enough activity to feel the pulse, but no overwhelming lines. Note: January 1 is New Year's Day in Siena, so expect special events, closures, and festive atmosphere.
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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 January 1
"Mild & Comfortable. Expect average highs of 9.6°C. 24% chance of snow."
What to Wear in Siena in January
Based on historical data for January 1, Siena typically experiences temperatures between 2.1°C and 9.6°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (24% 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
9.6°C
Daytime Peak
Average Low
2.1°C
Nighttime Low
Feels Like
7.8°C
❄️ Minor difference
Snow Chance
24%
Avg 1.4mm if it snows
Snowfall
0.1 cm
~24% chance
Pressure
1019.5 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 100% of the time. Safe to plan outdoor activities with confidence.
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°C
Dry air
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Travel & Logistics Insights
Local Calendar
Holiday
New Year's Day
Flight Traffic
Moderate
52/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~33
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Siena
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:48
☀️ Noon
12:19
🌇 Sunset
16:50
⏱️ Daylight
9h 1m
Wind Speed
12 km/h
Gentle breeze
Sunshine
5.3 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
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Siena
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
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 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 January 1 averages 9.6°C with a 24% precipitation probability. Wedding/Outdoor Event Score: 63/100."
— 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 25
10.3°C • 24% rain
Score
67
December 26
9.9°C • 25% rain
Score
65
December 27
9.8°C • 24% rain
Score
64
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 1) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Siena Worth Visiting on January 1?
Planning a trip to Siena on January 1? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 9.6°C with a 24% historical precipitation risk.
🎉 Local Event: The date coincides with New Year's Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 33 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 January 1 recorded in the last 30 years saw temperatures hit 12.9°C in 2023, while the coldest dropped to -1.6°C in 2017.