September 23 is statistically one of the best days of the year in Sofia. With minimal rain risk (10%) and pleasant highs of 21°C, it's ideal for outdoor adventures. Sofia is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Sofia
Currency
BGN
лв Bulgarian lev
Language
Bulgarian
Driving
Right side
Connect
5G internet is available from all three ...
Safety
High Safety
GPI: 1.541
Sofia Weather Forecast for September 23
"Mild & Comfortable. Expect average highs of 21.3°C. 10% chance of rain."
What to Wear in Sofia in September
Based on historical data for September 23, Sofia typically experiences temperatures between 10.7°C and 21.3°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (10% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Sofia
Smart Suitcase
- Light Jacket
- Long Pants
Average High
21.3°C
Daytime Peak
Average Low
10.7°C
Nighttime Low
Feels Like
21.5°C
☀️ Feels accurate
Rain Chance
10%
Avg 0.5mm if it rains
Cloud Cover
49%
Overcast
Pressure
1017.5 hPa
Medium volatility
Sofia Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 26 min to burn
Type III-IV
🟡 39 min to burn
Type V-VI
🟢 65 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.4°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 Bulgaria
Flight Traffic
High
88/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~84
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sofia
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:15
☀️ Noon
12:20
🌇 Sunset
18:25
⏱️ Daylight
12h 9m
Wind Speed
10 km/h
Light breeze
Sunshine
9.1 hrs
Direct Sun (Cloud-free)
Humidity
65%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Sofia
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Sofia
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
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
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Sofia on September 23 averages 21.3°C with a 10% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Sofia Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 23) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sofia Worth Visiting on September 23?
Planning a trip to Sofia on September 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 21.3°C with a 10% historical precipitation risk.
✈️ Travel Logistics: Approximately 84 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Bulgaria, including COVID-19.
📊 Historical Extremes: The hottest September 23 recorded in the last 30 years saw temperatures hit 31.9°C in 2023, while the coldest dropped to 5.1°C in 2022.