Weather in Sliven for September 2025
In general, the average temperature in Sliven at the beginning of September is 29.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25 °C by the end of September.
The climate of Sliven in September is notably wet, with an average of 14 rainy days, and a total of 70.7 mm of precipitation.
Is September a good time to visit Sliven? check out the best time to travel to Sliven page.
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Sliven Weather September
Temperatures trend during September in Sliven
September weather in Sliven day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 28° /16° | 0.3 mm | 6 | |
| 2 Sept. | Patchy rain possible | 29° /16° | 0.1 mm | 6 | |
| 3 Sept. |  Partly cloudy | 32° /18° | 0 mm | 8 | |
| 4 Sept. |  Moderate rain at times | 31° /18° | 0.5 mm | 7 | |
| 5 Sept. | Partly cloudy | 30° /16° | 0 mm | 8 | |
| 6 Sept. | Moderate rain at times | 31° /17° | 0.8 mm | 7 | |
| 7 Sept. | Patchy rain possible | 25° /15° | 0.4 mm | 6 | |
| 8 Sept. |  Sunny | 27° /14° | 0 mm | 7 | |
| 9 Sept. | Sunny | 28° /14° | 0 mm | 7 | |
| 10 Sept. | Patchy rain possible | 24° /16° | 2.2 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 21° /15° | 24.3 mm | 5 | |
| 12 Sept. | Sunny | 26° /14° | 0 mm | 7 | |
| 13 Sept. | Moderate rain at times | 27° /16° | 1 mm | 6 | |
| 14 Sept. | Moderate rain at times | 25° /13° | 14.1 mm | 6 | |
| 15 Sept. | Patchy rain possible | 20° /10° | 3.7 mm | 5 | |
| 16 Sept. |  Overcast | 18° /10° | 0 mm | 4 | |
| 17 Sept. | Sunny | 23° /11° | 0.4 mm | 6 | |
| 18 Sept. | Patchy rain possible | 22° /12° | 1.1 mm | 5 | |
| 19 Sept. |  Cloudy | 21° /12° | 0.1 mm | 5 | |
| 20 Sept. | Cloudy | 20° /12° | 0 mm | 5 | |
| 21 Sept. | Partly cloudy | 23° /9° | 0.7 mm | 6 | |
| 22 Sept. | Overcast | 24° /10° | 0 mm | 5 | |
| 23 Sept. | Partly cloudy | 25° /12° | 0 mm | 7 | |
| 24 Sept. | Sunny | 26° /13° | 0 mm | 7 | |
| 25 Sept. | Sunny | 27° /13° | 0 mm | 7 | |
| 26 Sept. | Partly cloudy | 28° /14° | 0 mm | 7 | |
| 27 Sept. | Sunny | 29° /14° | 0 mm | 7 | |
| 28 Sept. | Cloudy | 28° /15° | 0 mm | 6 | |
| 29 Sept. | Moderate or heavy rain shower | 25° /13° | 16.8 mm | 6 | |
| 30 Sept. |  Light drizzle | 12° /9° | 4.2 mm | 3 | |
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Sliven in September - FAQ
What to pack to Sliven in September?
As you prepare for your trip to Sliven in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sliven, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Sliven
UV exposure in Sliven during September
Quick links
Where is Sliven?Get accurate weather forecasts for Sliven, located at latitude 42.686 and longitude 26.329. Stay updated with localized weather information tailored for Sliven.