Weather in Sliven in September
Sliven, Bulgaria averages a high of 23.8°C (74.8°F) and low of 14.3°C (57.7°F) in September, with 7 rain days and 10.4 hours of daily sunshine. Travel score: 87.6/100 (Excellent). The best time to visit Sliven is August.
High
24°C75°F
Low
14°C58°F
🌧️
7
rain days
☀️
10.4
hrs/day sunshine
💧
67%
humidity
88— Excellent
September in Sliven is warm and mostly dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Sliven?
How much does it rain in Sliven in September?
Sliven receives an average of 54.7mm of rainfall across 7 rainy days in September. The annual total is 776.5mm.
What should I pack for Sliven in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 24°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to Bulgaria in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31