Go to Bovec in Slovenia
With mountains that linger in the blue sky, an emerald-green river Bovec offers picturesque scenes that are a must see for your bucket list.
Koper Weather in June
Thinking of visiting Koper in June? Expect high temperatures reaching 25°C (77°F) during the day, dropping to 18°C (64°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Koper in June
On average, there are about 15 days with rain during this month, averaging 94 mm (3.7 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Koper in June
June is a excellent month in Koper, with 25°C (77°F) during the day and 18°C (64°F) at night. June is typically considered a summer month. Overall, the month follows a fairly predictable daily temperature pattern. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Koper in June
The city usually sees around 276 hours of sunlight, indicating many sunny days , a great month for sightseeing.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Koper.
Koper Temperature in June
Min Temperature
18°C (64°F)
Max Temperature
25°C (77°F)
Chance of Rain
48%
Precipitation
94 mm (3.7 in)
Rainy days
15 days
Humidity
54% *
Sunshine
276 hours *
Percentage Sunshine
*
* Data from: Portorož, Slovenia (11 KM, 7 Miles).
Koper Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Koper - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koper typically rise from around 25°C (77°F) at the start of June to approximately 28°C (82°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 18°C (64°F).
Average temperatures in June
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Historical weather records for Koper in June
Browse day-by-day weather records for Koper spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koper historical weather extremes in June
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Koper.
- Koper recorded its highest June temperature of 37°C (99°F) on June 29, 2026.
- The lowest daytime temperature in June was 16°C (61°F), recorded on June 18, 1981.
- Koper registered its coldest June night on June 6, 1994, with temperatures dropping to 7°C (45°F).
Best Places in Slovenia in June
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in June →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Koper in June
Warm but pleasant conditions in Koper in June. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Koper in June
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Koper 3-Day Forecast
More climate data for Koper
Temperature Rainfall Sunshine Humidity
See the full Koper climate overview or explore weather in Slovenia.
Popular in June
Where to go in June - average daytime high across popular destinations.
Piran
25°C (77°F) Ljubljana
24°C (75°F) Portorož25°C (77°F) Maribor
25°C (77°F) Bled
22°C (72°F) Bovec22°C (72°F) Kranjska Gora21°C (70°F) Bohinj22°C (72°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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