Last updated: August 22, 2025
In October, the average temperature in Sliven, Bulgaria hovers around 13°C (55°F), with the potential to dip to a chilly 0°C (32°F) or rise up to a warm 29°C (85°F). Expect a precipitation amount of approximately 70 mm (2.7 in) over the course of 7 days, accompanied by an average humidity level of 78%. Whether you're braving the cold or enjoying the warmth, it’s a month full of diverse weather experiences!
In October in Sliven, the average temperature is 13°C (55°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as 0°C (32°F). This variation makes it a great time to explore outdoor activities while being prepared for cooler evenings.
In Sliven in October, the precipitation amount is 70 mm (2.7 in) over a period of 7 days.
In Sliven in October, humidity is 78%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket enveloping you, making outdoor activities feel steamy and your clothes cling uncomfortably, often leaving you longing for a cool breeze or an air-conditioned escape while exploring.
In Sliven in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Sliven, you can refer to this Hourly UV Index in Sliven.
UV Risk Categories
Weather in Sliven varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Sliven, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 54 mm (2.1 inches) | 88% | low |
| February Weather | 3°C (38°F) | 55 mm (2.2 inches) | 84% | moderate |
| March Weather | 5°C (42°F) | 75 mm (2.9 inches) | 81% | high |
| April Weather | 10°C (50°F) | 58 mm (2.3 inches) | 70% | very high |
| May Weather | 15°C (60°F) | 91 mm (3.6 inches) | 72% | very high |
| June Weather | 19°C (67°F) | 150 mm (5.9 inches) | 66% | very high |
| July Weather | 22°C (72°F) | 82 mm (3.2 inches) | 62% | very high |
| August Weather | 23°C (73°F) | 36 mm (1.4 inches) | 48% | very high |
| September Weather | 18°C (65°F) | 29 mm (1.2 inches) | 58% | high |
| October Weather | 13°C (55°F) | 70 mm (2.7 inches) | 78% | high |
| November Weather | 8°C (46°F) | 59 mm (2.3 inches) | 85% | moderate |
| December Weather | 3°C (38°F) | 89 mm (3.5 inches) | 87% | low |