May 21 is generally a great time to visit Sofia. While there is a slight chance of rain (34%), showers are usually brief. Expect comfortable 21°C weather. Expect a bustling atmosphere in Sofia right now—this is when the city truly comes alive with visitors.
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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 May 21
"Mild & Comfortable. Expect average highs of 21.3°C. 34% chance of rain."
What to Wear in Sofia in May
Based on historical data for May 21, Sofia typically experiences temperatures between 11°C and 21.3°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 34% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Sofia
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
21.3°C
Daytime Peak
Average Low
11°C
Nighttime Low
Feels Like
21.5°C
☀️ Feels accurate
Rain Chance
34%
Avg 2.4mm if it rains
Cloud Cover
56%
Light drizzle
Pressure
1014.7 hPa
Low volatility
Sofia Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 76% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 15 min to burn
Type III-IV
🟡 23 min to burn
Type V-VI
🟢 38 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
15.6°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
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~95
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Sofia
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:00
☀️ Noon
12:24
🌇 Sunset
19:48
⏱️ Daylight
14h 48m
Wind Speed
10.2 km/h
Light breeze
Sunshine
11.0 hrs
Direct Sun (Cloud-free)
Humidity
70%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Sofia
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 Sofia
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
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 May 21 averages 21.3°C with a 34% precipitation probability. Wedding/Outdoor Event Score: 93/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
May 19
20.6°C • 30% rain
Score
95
May 20
21°C • 32% rain
Score
94
May 27
21°C • 33% rain
Score
94
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Sofia Worth Visiting on May 21?
Planning a trip to Sofia on May 21? 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 34% historical precipitation risk.
✈️ Travel Logistics: Approximately 95 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 May 21 recorded in the last 30 years saw temperatures hit 27.6°C in 2022, while the coldest dropped to 7.9°C in 2019.