Last updated: August 22, 2025
In Sliven, Bulgaria, the average temperature in June hovers around 19°C (67°F), creating a pleasant climate for outdoor activities. Be prepared for a temperature range that can dip to a chilly 7°C (45°F) or soar to a warm 33°C (92°F). With an average precipitation amount of 150 mm (5.9 in) spread over 18 days, you might encounter occasional showers, so packing an umbrella is wise. The overall humidity sits at 66%, giving that refreshing yet slightly muggy feel!
In June in Sliven, the average temperature is 19°C (67°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as 7°C (45°F). This diverse range of temperatures makes Sliven an ideal destination for travelers seeking both warmth and cooler respite throughout the month.
In Sliven in June, the precipitation amount is 150 mm (5.9 in) over the course of 18 days.
In Sliven in June humidity is 66%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making it mildly uncomfortable for traveling, as you may find yourself needing to frequently stop for hydration and to seek shade from the sun.
In Sliven in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the 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 June’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 |