Last updated: August 27, 2025
In Koper, Slovenia, June greets visitors with warm and inviting weather, boasting a maximum temperature reaching up to 33°C (92°F) and a comforting average of 22°C (72°F). The month showcases a range of climate experiences, where minimum temperatures dip to a cool 11°C (53°F), offering pleasant evenings. Rain is not uncommon, with 87 mm (3.4 in) of precipitation spread over 8 days, contributing to a humidity level of 69%. This blend of warmth and occasional showers makes June an ideal time for outdoor activities and exploration in this charming coastal town.
In Koper, Slovenia, June ushers in the warmth of summer, with temperatures marking a notable shift from the cooler months. The month begins with a pleasant minimum of 11°C (53°F) and an inviting average of 22°C (72°F), reaching a peak of 33°C (92°F), making it one of the hottest times of the year. This warming trend reflects a dramatic contrast to earlier months, such as January and February, where temperatures hovered just above freezing. As June progresses, the balmy nights and sun-drenched days invite both locals and visitors to enjoy outdoor activities and the stunning coastal scenery. The gradual increase in temperature from May's comfortable 17°C (63°F) emphasizes June's transformation into a vibrant summer month, setting the stage for the peak heat of July and August. Whether lounging on the beach or exploring the charming streets, June in Koper offers a delightful and energetic atmosphere.
In June, Koper, Slovenia experiences a moderate shift in precipitation patterns, receiving 87 mm (3.4 in) of rain over 8 days. This is a notable decrease compared to the preceding month of May, which saw a significant 142 mm (5.6 in) spread across 17 days. The arrival of summer tends to bring slightly drier conditions, as reflected in June's totals. This trend is mirrored in the subsequent month of July, which typically offers even less rainfall at 65 mm (2.6 in). As the region transitions from spring to summer, Koper's climate showcases a delicate balance between sunshine and occasional rain, setting a refreshing stage for outdoor activities.
In Koper, Slovenia, June marks a notable transition in humidity levels, dipping to 69%—the lowest point of the year so far. This gradual decline in humidity begins in May when it reaches 70%, and continues through the summer, as July sees an even lesser 63%. The trend reflects a shift from the much higher and more oppressive humidity levels experienced in the winter months, which peak at 89% in November. This pattern indicates that while Koper’s climate remains humid, the summer months provide a welcome relief, creating an inviting atmosphere for outdoor activities and exploration.
June in Koper, Slovenia, showcases a notable surge in the UV Index, peaking at 9 and classified within the very high exposure category. This marks a continuation of the upward trend begun in May, where the UV Index reached 8. As sunlight intensifies during this summer month, the burn time shortens to just 15 minutes, underlining the importance of sun protection. This pattern not only highlights the need for vigilance during outdoor activities but also emphasizes that the hottest months, July and August, maintain similarly high UV levels. For more details on the UV trends, visit Koper UV Index.
UV Risk Categories
June in Koper, Slovenia, shines bright with an impressive 417 hours of sunshine, marking the peak of a gradual increase that begins with the year. As the months progress from January’s 182 hours to June’s radiant days, the pattern reveals a delightful transition into summer. The rise is particularly striking in the spring; April and May show significant jumps, paving the way for the sunniest month of all. This trend continues into July, which boasts even more sunshine at 430 hours, before tapering off in August. With these golden hours, Koper residents and visitors alike can bask in the warmth and beauty of summer, making June a truly enchanting time in the coastal city.
In Koper, Slovenia, the arrival of June marks a notable increase in the likelihood of sunny weather, with a 55% chance of sunshine gracing the skies. This figure showcases a trend of fluctuating sunshine opportunities throughout the year; while early months like January and February struggle with lower percentages of 32% and 41% respectively, March sees a significant uptick to 63%. As spring transitions to summer, the chances of sun dip slightly in April and May before rebounding in June. This pattern highlights the potential for pleasant days, a welcome indication that Koper is moving into its sunniest season, promising outdoor adventures and scenic coastal views.
As June unfolds in Koper, Slovenia, daylight reaches its peak, offering an impressive 15 hours of sunshine each day. This marks a significant leap from the 9 hours that greet the new year in January, reflecting the gradual lengthening of days as spring blossoms into summer. Following the vibrant increase in April's 13 hours and May's 14 hours, June effortlessly carries the momentum forward, providing ample time for outdoor adventures and leisurely strolls. However, as the summer months transition into autumn, daylight begins to recede; in July, it remains at 15 hours before gradually tapering off to 14 hours in August, and eventually down to 12 hours by September. This natural rhythm of increasing and decreasing daylight serves as a reminder of nature's cyclical beauty in Koper’s enchanting coastal setting.
In Koper, Slovenia, the winds of June bring a noticeable lull, with an average speed of just 2.2 m/s (5 mph), marking the month as one of the calmer times of the year. This gentle breeze follows a gradual increase from the typically mild winds of spring, which peak in May at 3.2 m/s (7 mph). Interestingly, the early summer months of July and August see a slight uptick in wind speeds, averaging 2.5 m/s (6 mph) and 2.8 m/s (6 mph) respectively. However, as summer transitions into autumn, the wind picks up again, with October and November boasting higher averages of 3.6 m/s (8 mph) and 3.7 m/s (8 mph). This trend suggests a seasonal rhythm: a refreshing calm in early summer, followed by a return to brisk breezes as the year winds down.
Weather in Koper varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Koper, focusing on differences in temperature, rainfall, humidity, and UV levels.
June and January present stark contrasts in weather. In June, temperatures fluctuate from a mild 11°C (53°F) at night to a warm 33°C (92°F) during the day, with an average of 22°C (72°F). This month receives a total precipitation of 87 mm (3.4 in) over about 8 days, accompanied by a humidity level of 69%. Meanwhile, January experiences much colder conditions, with temperatures ranging from a frigid -7°C (20°F) to a modest 13°C (56°F) and averaging only 5°C (41°F). Although January has less precipitation at 56 mm (2.2 in) over 7 days, the humidity is higher at 88%, contributing to a distinct chill in the air. For more details about January weather, visit Koper weather in January.
June and February present starkly contrasting weather conditions. In June, temperatures range from a minimum of 11°C (53°F) to a maximum of 33°C (92°F), with an average of 22°C (72°F). The month experiences around 87 mm (3.4 in) of precipitation over approximately 8 days, contributing to a humidity level of 69%. In contrast, February features a chillier climate, with temperatures varying from a minimum of -6°C (22°F) to a maximum of 19°C (67°F), averaging just 7°C (44°F). February also has higher precipitation at 118 mm (4.6 in) over about 10 days and a higher humidity of 82%. For more detailed climate insights, you can check out Koper weather in February.
June and March present quite contrasting weather conditions. June boasts a much warmer temperature range, with a minimum of 11°C (53°F) and a maximum reaching up to 33°C (92°F), averaging around 22°C (72°F). In contrast, March still feels chilly, starting with a minimum of -7°C (20°F) and a maximum of 21°C (70°F), averaging only 9°C (48°F). Precipitation levels are relatively similar, with June experiencing about 87 mm (3.4 in) across 8 days, while March sees slightly less at 71 mm (2.8 in) over the same number of days. Interestingly, March has a slightly higher humidity level at 73%, compared to June's 69%. For more details on March weather, check out Koper weather in March.
In comparing the weather of June and April, a noticeable contrast emerges in temperature and precipitation patterns. June typically boasts warmer conditions, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 33°C (92°F), while April is significantly cooler, averaging between 1°C (34°F) and 25°C (77°F). In terms of precipitation, April experiences slightly more rainfall, totaling 103 mm (4.0 in) over 10 days compared to June's 87 mm (3.4 in) over 8 days. Humidity levels are similar, with June at 69% and April slightly higher at 73%. For more detailed insights on weather during this time, check out Koper weather in April.
In comparing the weather of June to that of May, we can see some noteworthy differences. June experiences milder temperatures, with a minimum of 11°C (53°F), an average of 22°C (72°F), and a maximum of 33°C (92°F), making it considerably warmer than May, which has a minimum of 7°C (46°F), an average of 17°C (63°F), and a peak of 27°C (81°F). However, May is wetter, with a total precipitation of 142 mm (5.6 in) over 17 days, compared to June's 87 mm (3.4 in) over just 8 days. Humidity levels remain quite similar, with May at 70% and June at 69%. For those interested in a detailed breakdown of May's weather, check out Koper weather in May.
June and July display notable differences in weather patterns. June experiences a broader temperature range, with minimums dipping to 11°C (53°F) and a warm average of 22°C (72°F), while July marks a warmer start with minimums at 16°C (61°F) and a slightly higher average of 24°C (75°F). Both months see maximum temperatures peak at around 33°C (91°F to 92°F), but July tends to be slightly less humid at 63%, compared to June's 69%. Additionally, precipitation in July is lower, with 65 mm (2.6 inches) spread over 8 days, compared to June's 87 mm (3.4 inches) over the same number of days. For more detailed information, check out Koper weather in July.
June and August showcase distinct weather characteristics as summer progresses. In June, temperatures range from a cool 11°C (53°F) at night to a warm 33°C (92°F) during the day, with an average of 22°C (72°F). This month experiences higher humidity at 69% and more precipitation, totaling 87 mm (3.4 in) over about 8 days. In contrast, August offers warmer minimum temperatures at 15°C (59°F) and a slightly higher average of 25°C (77°F), with a peak maximum of 34°C (94°F). The month sees less rainfall, with a total of 70 mm (2.7 in) spread over just 7 days, and significantly lower humidity at 51%. These changes create a drier and more comfortable atmosphere in August, making it an appealing time to enjoy the outdoors. For further details on August weather, check out Koper weather in August.
In June, the weather typically features a warm average temperature of 22°C (72°F), with highs reaching up to 33°C (92°F), while the minimum temperature hovers around 11°C (53°F). The month experiences relatively moderate precipitation, totaling 87 mm (3.4 in) over about 8 days, and humidity levels are around 69%. In contrast, September brings slightly cooler conditions, with an average temperature of 20°C (68°F), maximums of 32°C (90°F), and minimums dropping to 9°C (49°F). However, it sees a notable increase in precipitation, reaching 164 mm (6.4 in) across 10 days, and humidity levels decrease slightly to 64%. For more detailed insights on September weather, you can check Koper weather in September.
June and October offer contrasting weather experiences. In June, temperatures range from a minimum of 11°C (53°F) to a maximum of 33°C (92°F), with an average of 22°C (72°F). The month features relatively lower humidity at 69% and experiences about 87 mm (3.4 in) of precipitation over 8 days. In contrast, October brings cooler weather, with temperatures dipping to a minimum of 6°C (44°F) and peaking at 23°C (74°F), averaging at 15°C (59°F). This month is marked by higher humidity at 83% and slightly more rainfall, with 107 mm (4.2 in) falling over 10 days. For more detailed insights, you can check Koper weather in October.
June and November present contrasting weather patterns. In June, temperatures range from a mild 11°C (53°F) at night to a warm 33°C (92°F) during the day, with an average of 22°C (72°F). While June brings a fair amount of humidity at 69% and 87 mm (3.4 in) of precipitation over 8 days, it is generally more favorable for outdoor activities. In stark contrast, November sees significantly cooler temperatures, with lows dropping to 1°C (34°F) and an average of only 11°C (52°F), peaking at 20°C (68°F). The month is wetter, with 176 mm (6.9 in) of rainfall spread across 12 days and a higher humidity level of 89%. For a detailed look at November weather in Koper, you can check out Koper weather in November.
June and December present contrasting weather conditions. In June, temperatures range from a minimum of 11°C (53°F) to a maximum of 33°C (92°F), with an average of 22°C (72°F), creating a warm and typically pleasant climate. However, it also sees a fair amount of precipitation, with 87 mm (3.4 in) falling over about 8 days, accompanied by a humidity level of 69%.
In stark contrast, December experiences much colder temperatures, with a minimum of -1°C (30°F) and a maximum of 15°C (60°F), averaging just 7°C (44°F). This month is also wetter, receiving 150 mm (5.9 in) of rain over approximately 12 days, and features higher humidity at 88%. For more details about the December weather, check out Koper weather in December.
June in Koper heralds the arrival of summer, bringing warm temperatures and a noticeable increase in humidity compared to the preceding months. With maximum temperatures peaking at 33°C, the days become vibrant and lively, perfect for enjoying the coastal charm of this Slovenian gem. However, it's also a month marked by occasional rain, with precipitation occurring on about eight days, reminding us that June is a transitional period as the climate shifts. This blend of warm, sunny days and sporadic showers creates a unique atmosphere, making Koper an enchanting destination. For a detailed look at what to expect throughout the year, be sure to check out Koper Climate.