Last updated: August 27, 2025
May in Ljubljana, Slovenia offers a delightful yet varied climate, with temperatures ranging from a refreshing 1°C (34°F) to a sun-soaked maximum of 28°C (82°F). The average temperature settles at a comfortable 14°C (58°F), making it an ideal time for outdoor exploration. However, be prepared for the possibility of rain, as the city experiences about 19 days of precipitation, totaling 166 mm (6.5 in). With humidity levels at around 70%, visitors can expect a mix of pleasant sunny days and occasional showers, perfect for appreciating the lush greenery that the season brings.
As May arrives in Ljubljana, Slovenia, residents and visitors alike experience a delightful shift in temperatures, signaling the official onset of spring. The minimum temperature hovers around 1°C (34°F), providing a touch of coolness amidst the warming days. With an average temperature of 14°C (58°F), this month serves as a comfortable bridge between the crispness of earlier months and the heat of summer. Daytime highs can reach an impressive 28°C (82°F), inviting outdoor adventures and lively gatherings in the city's charming parks and vibrant streets. This transformation from the chilly depths of winter to the warmer embrace of late spring is an enchanting time to explore Ljubljana, as blooming flowers and lush greenery paint the landscape in vivid colors.
In May, Ljubljana experiences a notable surge in precipitation, with an impressive 166 mm (6.5 in) of rainfall, making it the wettest month of the year. This significant increase in moisture coincides with a rise in rainy days, as the city witnesses 19 days of rain, adding to the lush beauty of spring. Comparatively, April’s rainfall of 94 mm (3.7 in) over only 12 days sets the stage for May's dramatic transformation. This trend highlights May as a pivotal month for the city, where the combination of ample rainfall and emerging greenery creates a vibrant, flourishing landscape, proving irresistible for nature enthusiasts and visitors alike.
In May, Ljubljana enjoys a relatively comfortable humidity level of 70%, marking the beginning of a gradual decline that will continue through the summer months. This slight reduction from the 73% recorded in both March and April indicates a transition to drier conditions, as the city approaches the warmest part of the year. As temperatures rise, humidity continues to decrease, peaking in August at just 51% before beginning its annual ascent again in the fall. This trend reflects the dynamic climate of Ljubljana, where lush spring days give way to balmy summers, offering a refreshing change after a winter characterized by much higher humidity levels of nearly 89% in November.
As spring transitions into summer, Ljubljana experiences a notable increase in the UV Index, with May reaching an impressive 8, placing it in the very high exposure category. This signifies a sharp rise from the previous months, with burn times decreasing significantly to just 15 minutes for fair-skinned individuals. Following the early months where the UV Index was mostly low to moderate, the surge in May emphasizes the importance of sun protection. As the days grow longer and sunnier, residents and visitors alike should be mindful of their sun exposure to enjoy the vibrant outdoors safely. For more detailed information on UV levels throughout the year, visit Ljubljana UV Index.
UV Risk Categories
As May unfolds in Ljubljana, the city basks in an abundance of sunshine, with an impressive 361 hours of daylight. This marks a significant leap from the 336 hours in April, showcasing a delightful trend of increasing sunshine as spring fully embraces the landscape. The transition from winter's grey to spring's glow is unmistakable, with sunlight pouring in and invigorating both nature and the city's vibrant atmosphere. Following May, the sun continues to shine generously, peaking in June with 408 hours, but May stands as a beautiful testament to the rejuvenating warmth and energy that accompanies the arrival of late spring in Slovenia's charming capital.
In Ljubljana, Slovenia, the likelihood of sunny weather in May is about 33%, which reflects a slight dip compared to the preceding month's sunshine probability of 37%. As spring unfolds, the chance of sun increases significantly from January's mere 23% to March's 58%; however, May falls back into a more moderate range, alongside the trend observed in April. This slight fluctuation suggests that while May may not guarantee abundant sunshine, it certainly offers a hopeful glimpse of warmer, brighter days ahead, setting the stage for the sunnier months of June and July. Overall, as the year progresses, the promise of sunny days becomes increasingly likely, with May serving as a bridge between the moderate conditions of early spring and the vibrant, sun-soaked summer to come.
As spring blossoms into summer, the daylight duration in Ljubljana, Slovenia, experiences a delightful transformation. Starting with 9 hours in January, the days gradually lengthen, adding an hour in February and another in March, reaching 11 hours of daylight. By April, the increase continues, bringing the total to 13 hours, and by May, Ljubljana basks in 14 hours of sunlight, marking the peak of spring's transition. June and July maintain this radiant glow with 15 hours each, offering long days perfect for outdoor activities. As summer wanes into August, daylight begins to recede slightly to 14 hours, before dipping again in September to 12 hours. The cycle continues, and by the end of the year, daylight falls to 8 hours in December, illustrating the rhythmic ebb and flow of nature's light across Ljubljana's calendar year.
In May, Ljubljana experiences a gentle breeze with an average wind speed of 2.1 m/s (5 mph), slightly tapering off from the higher winds of early spring. This marks a transition into a milder summer, as wind speeds generally begin to decline throughout the warmer months, reaching their lowest point in August at 1.6 m/s (4 mph). The city's wind patterns reveal a consistent tranquility, with late spring and early summer maintaining speeds that encourage enjoyable outdoor activities, perfect for strolling through Ljubljana’s picturesque streets or relaxing in its charming parks. As autumn approaches, a gradual increase in wind speed is noted again, culminating in a refreshing shift come October.
Weather in Ljubljana varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Ljubljana, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January showcase striking contrasts in weather. In May, temperatures range from a chilly 1°C (34°F) at night to a warm 28°C (82°F) during the day, with an average of 14°C (58°F). This month experiences 166 mm (6.5 in) of precipitation over 19 days, accompanied by a moderate humidity of 70%. In contrast, January is much colder, with temperatures dipping as low as -12°C (11°F) and peaking at only 12°C (54°F), averaging just 1°C (34°F). Precipitation is also lower in January, totaling 51 mm (2.0 in) across about 7 days, yet the humidity is higher at 88%. For more detailed information, check out Ljubljana weather in January.
May and February present stark contrasts in weather. In May, temperatures rise significantly, with a minimum of 1°C (34°F), averaging 14°C (58°F), and peaking at a sunny 28°C (82°F). However, this month also brings substantial rainfall, totaling 166 mm (6.5 in) over 19 days, accompanied by a humidity level of 70%. In contrast, February starts much colder, with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 19°C (67°F), resulting in an average of just 4°C (39°F). Precipitation is also lighter, with 88 mm (3.5 in) across 9 days, while the humidity reaches a higher level of 82%. For a detailed look at February's weather specifics, check out Ljubljana weather in February.
In comparing the weather of May and March, it becomes evident how dramatically temperatures and precipitation patterns shift with the changing seasons. May sees a much milder temperature range, with minimums around 1°C (34°F) and maximums reaching up to 28°C (82°F), averaging at 14°C (58°F). In contrast, March experiences colder conditions, starting with a minimum temperature of -14°C (8°F) and culminating at a maximum of 22°C (71°F), with an average of only 6°C (43°F). Additionally, May is marked by higher levels of precipitation, totaling 166 mm (6.5 in) over 19 days, while March has comparatively lighter rainfall of 71 mm (2.8 in) across just 10 days. Interestingly, humidity levels remain fairly similar, with March at 73% and May at 70%. For more detailed insights, you can check Ljubljana weather in March.
When comparing the weather of April and May, May tends to be milder and warmer, with average temperatures rising from April's 10°C (51°F) to 14°C (58°F). April experiences lower temperatures, with a minimum of -11°C (13°F) compared to May's minimum of 1°C (34°F). However, both months can see significant precipitation, with May receiving 166 mm (6.5 in) over 19 days, which is notably higher than April's 94 mm (3.7 in) over 12 days. Humidity levels are quite similar, with April at 73% and May at 70%. For more detailed information, you can check Ljubljana weather in April.
May and June showcase a notable transition in weather patterns. In May, temperatures range from a chilly minimum of 1°C (34°F) to a pleasant average of 14°C (58°F), peaking at a warm 28°C (82°F). The month also experiences considerable rainfall, with 166 mm (6.5 in) falling over 19 days, accompanied by a humidity level of 70%.
In contrast, June brings significantly warmer temperatures, with a minimum of 6°C (43°F) and an average of 20°C (68°F), reaching an inviting maximum of 34°C (94°F). Rainfall decreases to 84 mm (3.3 in) over 12 days, and humidity remains relatively stable at 69%. This month is characterized by sunnier days and more comfortable outdoor conditions. For more details, you can check the Ljubljana weather in June.
May and July exhibit distinct differences in weather patterns. May experiences a broader temperature range with minimums dipping to 1°C (34°F) and maximums reaching 28°C (82°F), while the average temperature sits comfortably at 14°C (58°F). This month is also characterized by higher humidity levels at 70% and considerable rainfall, amounting to 166 mm (6.5 in) over 19 days. In contrast, July offers warmer weather, with minimum temperatures of 10°C (51°F) and maximums soaring up to 34°C (93°F), resulting in a higher average of 21°C (70°F). Rainfall decreases significantly to 98 mm (3.9 in) over 13 days, accompanied by a lower humidity of 63%. For more detailed information, check out Ljubljana weather in July.
May and August showcase contrasting weather patterns. In May, temperatures range from a cool minimum of 1°C (34°F) to a warm maximum of 28°C (82°F), with an average of 14°C (58°F). However, this month is marked by considerable precipitation, totaling 166 mm (6.5 in) over 19 days and a high humidity level of 70%. In contrast, August experiences much warmer weather, with temperatures ranging from a minimum of 8°C (47°F) to a peak of 35°C (96°F), averaging 21°C (70°F). Precipitation is notably lower at 100 mm (3.9 in) across just 12 days and the humidity decreases to 51%. For more detailed insights, check out Ljubljana weather in August.
May and September offer distinct weather experiences, with May typically featuring cooler temperatures, ranging from a minimum of 1°C (34°F) to a maximum of 28°C (82°F), and an average of 14°C (58°F). The month is characterized by higher humidity at 70% and a significantly higher likelihood of rain, as evidenced by 166 mm (6.5 in) of precipitation over 19 days. In contrast, September presents slightly warmer conditions with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 29°C (85°F), accompanied by an average temperature of 16°C (61°F). Rainfall is less frequent, amounting to 159 mm (6.3 in) spread over just 12 days, and humidity is lower at 64%. For more details on September weather, you can check out Ljubljana weather in September.
May and October present distinct weather patterns, reflecting the transition from spring to autumn. In May, temperatures range from a cool minimum of 1°C (34°F) to a warm maximum of 28°C (82°F), with an average of 14°C (58°F). The month is relatively wet, featuring 19 days of precipitation and a total of 166 mm (6.5 in) of rain, along with a modest humidity level of 70%. In contrast, October sees cooler temperatures, with a minimum of 0°C (31°F) and a maximum of 24°C (76°F), averaging around 11°C (52°F). This month experiences less rainfall, with only 9 days of precipitation totaling 98 mm (3.9 in), but the humidity rises to 83%. For more detailed insights into October weather, you can check Ljubljana weather in October.
When comparing the weather in May and November, there are significant differences in temperature and conditions. May experiences milder temperatures, with averages ranging from a minimum of 1°C (34°F) to a maximum of 28°C (82°F), while November is much cooler, with temperatures ranging from a minimum of -6°C (22°F) to a maximum of 18°C (65°F). Additionally, May sees more precipitation, with 166 mm (6.5 in) over 19 days, compared to November's 131 mm (5.2 in) over just 11 days. The humidity is also notably higher in November at 89%, compared to 70% in May. For a detailed look at November weather specifics, you can visit Ljubljana weather in November.
May and December offer starkly contrasting weather in Ljubljana. In May, temperatures range from a minimum of 1°C (34°F) to a comfortable average of 14°C (58°F), peaking at 28°C (82°F), accompanied by moderate precipitation of 166 mm (6.5 in) over 19 days. Humidity levels hover around 70%, creating a pleasantly mild atmosphere. In contrast, December experiences much colder conditions, with temperatures dipping to a minimum of -15°C (6°F) and averaging just 2°C (36°F). The month sees less precipitation at 121 mm (4.8 in) across 10 days, but with a higher humidity of 88%. For more details, check out Ljubljana weather in December.
As May unfolds in Ljubljana, the city experiences a delightful shift from the chill of winter to warmer days. Temperatures begin to rise, providing a refreshing escape with pleasant highs around 28°C while the average daily temperature sits comfortably at 14°C. Compared to the preceding months, the days grow longer and more vibrant, yet it’s essential to embrace the occasional spring rain, as 19 days can bring some precipitation, totaling around 166 mm. With humidity hovering around 70%, the air feels fresh but a touch damp, creating a lush and green backdrop ideal for outdoor exploration. To learn more about the weather patterns and what to expect throughout the year, check out the detailed insights on Ljubljana Climate.