January 12 is statistically one of the best days of the year in Siena. With minimal rain risk (13%) and pleasant highs of 9°C, it's ideal for outdoor adventures. You'll enjoy Siena with reasonable crowd levels and competitive accommodation options.
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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 12
"Mild & Comfortable. Expect average highs of 9°C. 13% chance of rain."
What to Wear in Siena in January
Based on historical data for January 12, Siena typically experiences temperatures between 0.8°C and 9°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (13% 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°C
Daytime Peak
Average Low
0.8°C
Nighttime Low
Feels Like
7.2°C
❄️ Minor difference
Rain Chance
13%
Avg 0.6mm if it rains
Cloud Cover
59%
Overcast
Pressure
1019.7 hPa
Medium 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
🔴 200 min to burn
Type III-IV
🟡 300 min to burn
Type V-VI
🟢 500 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
5.9°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
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
07:46
☀️ Noon
12:23
🌇 Sunset
17:01
⏱️ Daylight
9h 14m
Wind Speed
11.6 km/h
Light breeze
Sunshine
6.3 hrs
Direct Sun (Cloud-free)
Humidity
81%
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
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
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 12 averages 9°C with a 13% precipitation probability. Wedding/Outdoor Event Score: 67/100."
— 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
Compare Other Cities
Same date (January 12) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Siena Worth Visiting on January 12?
Planning a trip to Siena on January 12? 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°C with a 13% historical precipitation risk.
✈️ 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 12 recorded in the last 30 years saw temperatures hit 12.6°C in 2023, while the coldest dropped to -3.9°C in 2019.