October 23 is generally a great time to visit Siena. While there is a slight chance of rain (27%), showers are usually brief. Expect comfortable 19°C weather. As it's peak season for Siena, we recommend booking your stay well in advance to secure the best rates.
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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 October 23
"Mild & Comfortable. Expect average highs of 19°C. 27% chance of rain."
What to Wear in Siena in October
Based on historical data for October 23, Siena typically experiences temperatures between 10.6°C and 19°C. We recommend packing light jacket, long pants to stay comfortable. With a 27% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Siena
Smart Suitcase
- Light Jacket
- Long Pants
Average High
19°C
Daytime Peak
Average Low
10.6°C
Nighttime Low
Feels Like
19°C
🌤️ Feels accurate
Rain Chance
27%
Avg 2.1mm if it rains
Cloud Cover
61%
Overcast
Pressure
1016.9 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 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
Type I-II
🔴 62 min to burn
Type III-IV
🟡 93 min to burn
Type V-VI
🟢 155 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
15.7°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Italy
Flight Traffic
High
84/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~54
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Siena
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:39
☀️ Noon
12:00
🌇 Sunset
17:21
⏱️ Daylight
10h 42m
Wind Speed
13.3 km/h
Gentle breeze
Sunshine
7.3 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
⛅ Good
Tourist Crowds
🟡 Busy
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 October 23 averages 19°C with a 27% precipitation probability. Wedding/Outdoor Event Score: 94/100."
— 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
October 16
19.4°C • 22% rain
Score
97
October 24
19°C • 22% rain
Score
96
October 27
18.7°C • 19% rain
Score
96
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 23) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Siena Worth Visiting on October 23?
Planning a trip to Siena on October 23? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 19°C with a 27% historical precipitation risk.
✈️ Travel Logistics: Approximately 54 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 October 23 recorded in the last 30 years saw temperatures hit 25.5°C in 2019, while the coldest dropped to 7.7°C in 2017.