Last updated: August 27, 2025
May in Slovenia presents a dynamic climate, where temperatures can reach a maximum of 27°C (81°F), while the average sits comfortably at 14°C (57°F). The month is marked by a minimum temperature dipping to 0°C (32°F), emphasizing the transition from the cool spring to the approaching summer heat. With 159 mm (6.3 in) of precipitation spread over 19 days, residents and visitors can expect frequent rain, contributing to the region’s lush landscapes. A relative humidity of 74% often adds to the air's richness, creating a vibrant, refreshing atmosphere ideal for outdoor exploration and enjoying Slovenia's breathtaking natural beauty.
In May, Slovenia experiences a delightful shift in temperatures that heralds the arrival of spring. With minimum temperatures rising to 0°C (32°F) and averages hovering around 14°C (57°F), the chill of winter gives way to a more inviting warmth. Days can reach up to 27°C (81°F), allowing both locals and visitors to enjoy the blossoming landscapes and outdoor activities. This month marks a significant progression from the chilly -16°C (4°F) lows of January, showcasing a comforting trend toward milder conditions. As Slovenia transitions into summer, May becomes a perfect time for exploring its enchanting nature, where pleasant temperatures meet vibrant greenery.
May in Slovenia marks a significant surge in precipitation, with 159 mm (6.3 in) of rain falling over 19 days, making it one of the wettest months of the year. This dramatic increase from April's 100 mm (3.9 in) emphasizes a notable shift as spring transitions into summer. The consistent rainfall often creates lush landscapes, fostering vibrant flora and reflecting the region's rich biodiversity. As the warm days of May bring life to the outdoors, the nearly daily showers also serve as a reminder of the dynamic weather patterns that define Slovenia's climate. This trend of escalating precipitation, particularly in May, sets the stage for the approaching summer, showcasing the region's ability to balance rain and sunshine harmoniously.
As spring transitions to summer in Slovenia, May brings a noticeable shift in humidity, dipping to 74%—a refreshing change that signals the arrival of warmer days. This decline continues the trend from previous months, where humidity has steadily decreased from 91% in January to April's 79%. Following this pattern, June and July maintain a similar level of humidity at 75% and 74%, respectively, suggesting a seasonal consistency. In contrast, the months leading into winter see a resurgence in humidity, rising sharply to 88% in October. Overall, May offers a brief respite from the year’s earlier humidity peaks, providing a perfect backdrop for enjoying Slovenia’s vibrant spring landscape.
As May arrives in Slovenia, the UV Index surges to 8, signaling a shift into the very high exposure category, with a burn time of just 15 minutes. This reflects a significant increase from April's UV Index of 6, where the burn time was longer at 25 minutes. The trend indicates a growing intensity of UV radiation as the region moves toward summer. With the UV levels peaking at 9 in the following months, including June and July, it's crucial to take precautions during this vibrant time of year. Stay protected by checking the daily UV Index to ensure you can enjoy the sunny days safely.
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As spring gives way to summer in Slovenia, May shines brightly with 355 hours of sunshine, marking a delightful peak in daylight hours. This upward trend begins in January with a modest 178 hours and steadily climbs, revealing a robust increase that characterizes the region's transition into warmer months. April's 331 hours set the stage for May's sun-soaked days, while June continues this sunny trajectory, reaching 396 hours. These patterns not only indicate longer days but also invite outdoor adventures, making Slovenia a perfect destination for nature enthusiasts and sun-seekers alike as the season unfolds.
In May, Slovenia experiences a 31% chance of sunny weather, marking a slight dip from the previous months. After swinging between 55% in March and a promising 41% in February, the likelihood of sunshine shows a seasonal trend aligning more closely with the cooler months of the year. This percentage is indicative of the transition into summer, with sunnier June days ahead, which brings a healthy 50% chance of sunshine. Notably, while May may not boast the brightest skies, it stands in contrast to other transitional months like April with its 34% chance, showing that sunny days are still possible amidst the lingering spring climate.
As spring unfolds, Slovenia basks in the gradual increase of daylight, culminating in May with an average of 14 hours of sunlight. This charming progression begins in January with just 9 hours, slowly climbing to 10 hours in February and further to 11 by March. By April, the days lengthen significantly, heralding the arrival of warmer weather. The momentum continues into May, where the vibrant days are a joyful precursor to summer, as daylight peaks at 15 hours in June and July. The trend reflects a rhythm of nature, where the longer days of late spring and summer contrast beautifully with the shorter, cozier hours of autumn and winter, making Slovenia a delight for sun-seekers during this time.
In May, Slovenia experiences a refreshing consistency in wind, with an average wind speed of 1.8 m/s (4 mph). This gentle breeze is in line with the preceding months of April and February, showcasing a stable pattern leading into the warmer season. The wind speeds remain notably moderate throughout spring, providing a pleasant backdrop for outdoor activities and blooming landscapes. As the year progresses into summer, a slight dip to 1.6 m/s in June indicates a subtle shift, but overall, the winds in May mark a transitional period, embracing the soft, serene ambiance that characterizes this picturesque month.
Weather in varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in , focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present starkly contrasting weather conditions. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 27°C (81°F) during the day, with an average of 14°C (57°F). This month also experiences significant precipitation, totaling 159 mm (6.3 in) over about 19 wet days, coupled with a moderate humidity level of 74%. In contrast, January is much colder, with temperatures plunging to a minimum of -16°C (4°F) and only reaching a maximum of 12°C (53°F), averaging around -1°C (31°F). Precipitation is much lighter during this month, amounting to 46 mm (1.8 in) over just 6 days, while humidity levels soar to 91%. For more details about January weather, visit weather in January.
When comparing the weather in May and February, it's clear that May brings significantly warmer temperatures, with a minimum of 0°C (32°F) and an average of 14°C (57°F), peaking at 27°C (81°F). In contrast, February is much colder, with temperatures ranging from a minimum of -14°C (8°F) to a maximum of 18°C (65°F) and an average of just 2°C (37°F). Additionally, May experiences more precipitation, totaling 159 mm (6.3 in) over 19 days, whereas February sees only 79 mm (3.1 in) over 8 days. The humidity levels are also higher in February at 87%, compared to May's 74%. For more detailed information, you can check the weather in February.
May and March present distinctly different weather characteristics. In March, temperatures can drop to as low as -16°C (3°F), with an average temperature of 5°C (41°F) and a maximum of 21°C (70°F). Conversely, May starts to warm up with a minimum of 0°C (32°F), an average of 14°C (57°F), and can reach heights of up to 27°C (81°F). While March experiences less precipitation, totaling 70 mm (2.8 in) over 9 days, May sees a significant increase in rainfall, with 159 mm (6.3 in) spread across 19 days. Additionally, humidity levels are higher in March at 82%, compared to 74% in May, making the transition into spring feel noticeably more comfortable. For a more detailed look at the March weather, you can check weather in March.
May weather showcases a notable warming trend compared to April. The average temperature rises from 10°C (50°F) in April to 14°C (57°F) in May, with max temperatures peaking at 27°C (81°F) compared to April’s 25°C (77°F). However, May experiences a higher level of precipitation, totaling 159 mm (6.3 in) over 19 days, compared to April's 100 mm (3.9 in) over 12 days. Despite the warmer temperatures, humidity in May is slightly lower at 74%, compared to April's 79%. For more details, check the weather in April.
In comparing the weather between May and June, it becomes evident that June experiences milder temperatures, with a minimum of 4°C (40°F) and an average of 19°C (66°F), compared to May's minimum of 0°C (32°F) and average of 14°C (57°F). The maximum temperature in June also reaches higher, peaking at 34°C (93°F), while May's maximum is 27°C (81°F). Rainfall decreases in June, with 96 mm (3.8 in) of precipitation over 14 days, compared to May’s 159 mm (6.3 in) over 19 days. Humidity remains relatively stable, slightly increasing in June to 75% from May's 74%. For more details on weather patterns, you can check the weather in June.
May and July present notable contrasts in weather patterns. In May, temperatures range from a chilly 0°C (32°F) to a comfortable maximum of 27°C (81°F), with an average of 14°C (57°F). The month is marked by significant rainfall, accumulating to 159 mm (6.3 in) over 19 days, contributing to a high humidity level of 74%. In contrast, July experiences warmer conditions, with temperatures sitting between a minimum of 9°C (49°F) and a peak of 32°C (90°F), averaging 20°C (68°F). This month sees less precipitation, totaling 119 mm (4.7 in) over 16 days, while maintaining the same humidity level of 74%. For more detailed insights, you can check the weather in July.
In May, the weather tends to be quite variable, with temperatures ranging from a chilly 0°C (32°F) to a warm 27°C (81°F), averaging around 14°C (57°F). This month sees more precipitation, totaling 159 mm (6.3 in) over about 19 days, and higher humidity levels at 74%. In contrast, August offers a more stable climate, with temperatures ranging from a mild 8°C (46°F) at night to a hot 35°C (95°F) during the day, averaging 20°C (69°F). Precipitation decreases to 125 mm (4.9 in) over just 15 days, and humidity drops to a comfortable 68%. For a detailed outlook, check out the weather in August.
In comparing the weather of May and September, both months exhibit similar temperature ranges and humidity levels. May typically experiences temperatures ranging from a chilly 0°C (32°F) to a warm 27°C (81°F), with an average temperature of 14°C (57°F). Conversely, September offers a slightly higher average of 15°C (60°F), with maximum temperatures peaking at 28°C (83°F). Precipitation is also noteworthy, as May sees 159 mm (6.3 in) over approximately 19 days, while September has a modestly lower precipitation total of 152 mm (6.0 in) spread across 13 days. Both months maintain a high humidity of 74%, contributing to a similar feel in the air. For more detailed insights, you can check the weather in September.
May and October present strikingly different weather patterns. In May, temperatures can range from a chilly 0°C (32°F) at night to a pleasant 27°C (81°F) during the day, with an average of 14°C (57°F). However, the month is also quite wet, seeing 159 mm (6.3 in) of precipitation over 19 days and maintaining a humidity level of 74%. In contrast, October experiences cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 23°C (74°F), averaging around 10°C (51°F). The month is significantly drier, with only 87 mm (3.4 in) of rainfall over just 9 days, but the humidity is higher at 88%. For more detailed information, check out the weather in October.
May and November display contrasting weather patterns, highlighting the transition from spring to late autumn. In May, temperatures range from a chilly 0°C (32°F) to a warm 27°C (81°F), with an average of 14°C (57°F), accompanied by significant rainfall of 159 mm (6.3 in) over 19 days and moderate humidity at 74%. In contrast, November sees much cooler temperatures, with a minimum of -10°C (14°F) and a maximum of 18°C (65°F), averaging just 6°C (42°F). The month is also marked by lower precipitation at 133 mm (5.2 in) over 11 days, but it features higher humidity levels at 90%. For more detailed information, you can check the weather in November.
May and December present strikingly contrasting weather conditions. In May, temperatures range from a chilly 0°C (32°F) at night to a pleasant 27°C (81°F) during the day, offering a comfortable average of 14°C (57°F). The month sees ample precipitation, totaling 159 mm (6.3 in) across 19 days, while humidity rests at a moderate 74%.
In contrast, December brings a much colder climate, with minimum temperatures plummeting to -17°C (1°F) and an average of just 1°C (33°F). The maximum temperature barely reaches 13°C (55°F), accompanied by 111 mm (4.4 in) of precipitation over 10 days. Humidity is higher in December, reaching 89%, which adds to the chilly atmosphere. For more details on the conditions, visit weather in December.
As May arrives, it brings a refreshing transition from the chill of spring to the warmth of early summer. With a significant rise in temperatures, it offers a delightful contrast to the cooler months, while still maintaining a notable level of humidity that keeps the air feeling fresh. This month is characterized by a fair amount of rainfall, with nearly half the days seeing some precipitation. This balance of warmth and moisture not only invigorates the landscape but also sets the stage for vibrant blooms, making it a captivating time to experience the charm of nature. For more insights on how the weather evolves throughout the year, check out our detailed Climate section.