Last updated: August 27, 2025
April in Koper, Slovenia, showcases a delightful transition into spring, with maximum temperatures reaching a pleasant 25°C (77°F). The average temperature settles around a comfortable 13°C (55°F), while nighttime can dip to a brisk 1°C (34°F). Visitors can expect some rain, as the month averages 103 mm (4.0 in) of precipitation over approximately 10 days, contributing to the lush, vibrant scenery. With a humidity level of 73%, the air feels fresh and invigorating, perfect for exploring the charming coastal town and its stunning surroundings.
As April ushers in the first whispers of spring in Koper, Slovenia, the temperatures begin to rise, marking a delightful departure from the chill of winter. The month starts with a minimum of 1°C (34°F), giving way to an average of 13°C (55°F) and a pleasant maximum reaching 25°C (77°F). This significant warmth compared to the preceding months, where winter's grasp still lingered, creates a vibrant atmosphere perfect for outdoor exploration and enjoying the blossoming landscapes. The gradual transition in April exemplifies a notable trend towards milder weather, setting the stage for the even warmer months ahead. As the sun shines brighter and the days grow longer, Koper transforms into a picturesque destination, inviting visitors to bask in its natural beauty.
April in Koper, Slovenia, brings a significant uptick in precipitation, with 103 mm (4.0 in) of rain falling over 10 days. This increase follows March's somewhat drier conditions, which recorded 71 mm (2.8 in) across just 8 days. April's rainfall is a precursor to the wetter months ahead, as May averages even higher with 142 mm (5.6 in) of precipitation over 17 days. Notably, this progression demonstrates a clear trend of increasing rain leading into the summer, creating a lush backdrop as the region transitions from spring to summer. This consistent pattern of rising precipitation sets the stage for the vibrant landscapes that attract both locals and visitors alike.
April in Koper, Slovenia, marks a subtle transition in humidity levels as spring settles in. With humidity holding steady at 73%, April mirrors the March figures, showcasing a gradual easing from the winter months, which hovered around 88% in January. This month signals the start of a downward trend, as humidity is set to drop further to 70% by May. As Koper basks in the moderate spring air, residents can enjoy the fresh bloom of the season, all while appreciating the increasingly comfortable atmosphere that precedes the warmer summer months.
As April arrives in Koper, Slovenia, residents and visitors should brace for an increase in sun exposure, characterized by a UV Index of 6, which falls into the high exposure category. This marks a noticeable rise from March's moderate levels, signifying that the sun's rays are becoming more intense. With a recommended burn time of just 25 minutes, it's essential to prioritize sun safety as outdoor activities become more appealing. This shift not only highlights the transition toward summer but also sets the stage for even higher UV levels in May. For those looking for more information on sun safety and UV trends, check out Koper UV Index.
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As spring unfolds in Koper, Slovenia, April shines with an impressive 344 hours of sunshine, marking a delightful continuation of the upward trend that began in March. With each passing month, the sun seems to take center stage, escalating from 315 hours in March to this vibrant April glow. The increase in sunlight is not just a matter of hours; it's a herald of warmer days ahead, as May and June promise to elevate this bright spectacle further, reaching their peaks with 372 and 417 hours respectively. This progression signals a captivating transition from the cozy, albeit darker winter months, inviting both locals and visitors to bask in Koper's blossoming beauty and enjoy the myriad outdoor adventures that come with the sun's return.
In Koper, Slovenia, the likelihood of sunny weather in April hovers at around 43%, reflecting a slight dip from the preceding month of March, which enjoys a more promising 63% chance of sunshine. This pattern indicates that while spring is on the horizon, the transition from winter to sunnier days is still unfolding. Interestingly, April's chances are comparable to those in May, where the sun peeks out 40% of the time. As we move toward summer, the expectations shift upwards, with June offering better prospects at 55%. Overall, Koper's April weather provides a mix of both sunny and cloudy spells, making it a captivating month for those eager to enjoy the budding landscape of spring.
As spring unfolds in Koper, Slovenia, April marks a delightful transition into longer days, with daylight stretching to 13 hours. This increase is a significant jump from the 11 hours experienced in March, heralding the return of vibrant outdoor activities and longer evenings. As the month progresses, residents and visitors alike can enjoy the growing warmth and brightness, setting the stage for even longer days ahead. May will bring an additional hour of sunlight, before the summer months peak at 15 hours in both June and July. This trend of increasing daylight not only enhances the beauty of Koper's coastline but also invites a lively atmosphere as the community embraces the essence of spring.
In April, Koper experiences a refreshing revival in wind activity, with an average wind speed of 3.0 m/s (7 mph), mirroring the conditions of January. This resurgence signals the transition into spring as the coastal city shakes off the winter's calm. Notably, April's breezes provide a gentle boost in comparison to the preceding months, which showcase progressively lighter winds; March reached a low of 2.6 m/s (6 mph). Following in May, the winds pick up slightly to 3.2 m/s (7 mph), indicating a trend of increasing airflow as the season progresses, while summer months such as June and July see a dip, highlighting the cyclical nature of Koper's breezy climate. Enjoying the brisk April winds offers a perfect opportunity to embrace the coastal charm and the vibrancy of nature returning to life.
Weather in Koper varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Koper, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of April and January, it’s evident that April brings warmer temperatures, with a minimum of 1°C (34°F) and an average of 13°C (55°F), peaking at a comfortable 25°C (77°F). In contrast, January is significantly colder, featuring a minimum of -7°C (20°F), an average of 5°C (41°F), and a maximum of 13°C (56°F). Additionally, April experiences more rainfall, with 103 mm (4.0 in) over 10 days, compared to January's 56 mm (2.2 in) over just 7 days. The humidity levels are also higher in January at 88%, compared to April's 73%. For more detailed insights, you can check out Koper weather in January.
April typically showcases a more moderate climate compared to February, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 25°C (77°F). In contrast, February has colder temperatures, starting at a minimum of -6°C (22°F) and peaking at just 19°C (67°F). While both months see similar precipitation levels, with April receiving 103 mm (4.0 in) and February 118 mm (4.6 in), February's higher humidity at 82% adds to the chill in the air. For more detailed insights on Koper's February weather, visit Koper weather in February.
April weather shows a significant warming trend compared to March, with average temperatures rising from 9°C (48°F) in March to 13°C (55°F) in April. While both months experience similar humidity levels at 73%, April sees a higher maximum temperature of 25°C (77°F) compared to March's 21°C (70°F). Additionally, precipitation increases in April, totaling 103 mm (4.0 in) over 10 days, compared to March's 71 mm (2.8 in) over 8 days. For more details on March weather specifics, you can visit Koper weather in March.
April and May showcase a notable transition in weather patterns. In April, temperatures range from a chilly minimum of 1°C (34°F) to a pleasant maximum of 25°C (77°F), with an average of 13°C (55°F). Although humidity is relatively high at 73%, the month experiences around 103 mm (4.0 in) of precipitation over 10 days. In contrast, May sees warmer temperatures, with a minimum of 7°C (46°F) and a maximum reaching 27°C (81°F), and an average of 17°C (63°F). However, it also brings increased rainfall, totaling 142 mm (5.6 in) over 17 days, while humidity slightly decreases to 70%. For a detailed overview of May's weather, you can visit Koper weather in May.
April and June offer distinctly different weather experiences. In April, temperatures range from a chilly minimum of 1°C (34°F) to a pleasant average of 13°C (55°F), with highs reaching up to 25°C (77°F). This month also sees significant precipitation, totaling 103 mm (4.0 in) over about 10 days and an average humidity of 73%. In contrast, June boasts much warmer temperatures, with a minimum of 11°C (53°F), an average of 22°C (72°F), and maximum temperatures soaring to 33°C (92°F). Precipitation is slightly less, at 87 mm (3.4 in) over just 8 days, while humidity decreases to 69%. These differences highlight June's transition into summer warmth compared to the cooler and wetter April. For more detailed information, refer to Koper weather in June.
April and July exhibit significantly different weather patterns. In April, temperatures range from a chilly minimum of 1°C (34°F) to a comfortable maximum of 25°C (77°F), with an average of 13°C (55°F). This month also sees higher precipitation levels, totaling 103 mm (4.0 in) over about 10 days, alongside a humidity level of 73%, creating a damp and vibrant atmosphere. In contrast, July experiences much warmer temperatures, with a minimum of 16°C (61°F) and a maximum reaching up to 33°C (91°F), averaging around 24°C (75°F). Rainfall decreases significantly to 65 mm (2.6 in) over approximately 8 days, and humidity drops to 63%, resulting in a drier and sunnier environment. For more details on July weather, visit Koper weather in July.
April and August present quite contrasting weather patterns. In April, temperatures range from a chilly 1°C (34°F) at night to a pleasant 25°C (77°F) during the day, with an average of 13°C (55°F). The month is characterized by significant rainfall, with 103 mm (4.0 in) of precipitation over approximately 10 days, contributing to a higher humidity level of 73%. In stark contrast, August boasts much warmer temperatures, with minimums of 15°C (59°F), averages hitting 25°C (77°F), and highs reaching up to 34°C (94°F). The month sees less rainfall, totaling only 70 mm (2.7 in) over about 7 days, and the humidity drops to a more comfortable 51%. For more details, you can check Koper weather in August.
When comparing the weather in April and September, notable differences emerge. April features a cooler climate, with temperatures ranging from a minimum of 1°C (34°F) to a pleasant maximum of 25°C (77°F), but also brings significant rainfall, averaging 103 mm (4.0 in) over about 10 days, accompanied by a higher humidity level of 73%. In contrast, September enjoys warmer temperatures, starting at a minimum of 9°C (49°F) and reaching up to 32°C (90°F) on the hottest days. However, it also experiences increased rainfall, averaging 164 mm (6.4 in), while maintaining a lower humidity of 64%. For more specific insights into September weather, you can visit Koper weather in September.
April and October exhibit notable differences in weather patterns. In April, temperatures range from a cool 1°C (34°F) at night to a mild 25°C (77°F) during the day, resulting in an average of 13°C (55°F). Meanwhile, October enjoys slightly warmer nights with a minimum of 6°C (44°F) and an average temperature of 15°C (59°F), peaking at 23°C (74°F). Both months feature about 10 days of precipitation, with April receiving 103 mm (4.0 in) and October slightly more at 107 mm (4.2 in). Humidity is also higher in October at 83%, compared to April’s 73%. For more specifics on October weather, you can check this link: Koper weather in October.
April and November present distinct weather patterns, characterized by their temperature and precipitation levels. In April, temperatures range from a minimum of 1°C (34°F) to a maximum of 25°C (77°F), with an average of 13°C (55°F), making it a milder month overall. However, it experiences about 103 mm (4.0 in) of precipitation over 10 days, with humidity at 73%. In contrast, November sees slightly cooler temperatures, with a maximum of 20°C (68°F) and an average of 11°C (52°F), while also maintaining a minimum of 1°C (34°F). Precipitation increases to 176 mm (6.9 in) over approximately 12 days, coupled with higher humidity at 89%. For more detailed insights into the climate during this time, you can check Koper weather in November.
April generally offers milder temperatures with an average high of 13°C (55°F) and a maximum of 25°C (77°F), while December's climate is noticeably cooler with an average high of 7°C (44°F). Rainfall is more pronounced in December, with 150 mm (5.9 in) of precipitation over 12 days, compared to April's 103 mm (4.0 in) over 10 days. Additionally, December experiences higher humidity levels at 88%, compared to April's 73%. For more detailed insights about December's weather, you can check Koper weather in December.
As April unfolds in Koper, the transition to spring becomes evident, marked by a delightful blend of milder temperatures and increased rainfall compared to the preceding months. With temperatures reaching a pleasant maximum of 25°C, this month showcases a significant warmth that contrasts with the cooler early spring days. However, the average temperature of 13°C highlights the lingering chill, particularly during the nights. April often sees increased precipitation, with about 10 rainy days throughout the month, contributing to the overall humidity level of 73%, making it one of the wetter months in the region. This combination of warmth and moisture not only rejuvenates the landscape but also sets the stage for the blossoming beauty of May, creating an inviting atmosphere for both locals and visitors alike. For a deeper dive into what to expect throughout the year, check out the full details on Koper Climate.