Last updated: August 27, 2025
In May, Slovenia experiences a delightful transition into spring, marked by a maximum temperature reaching 27°C (82°F) and a refreshing average of 12°C (55°F). However, the weather is not without its quirks, as temperatures can dip as low as 0°C (32°F), especially during the night. Visitors should prepare for occasional rain, with an average precipitation amount of 184 mm (7.3 in) spread over 21 days, contributing to a humidity level of 74%. This dynamic weather offers a vibrant backdrop for springtime activities, highlighting the beauty of Slovenia's lush landscapes.
In May, Slovenia experiences a delightful transition into warmer weather, marking a significant shift from the frosty depths of winter. With minimum temperatures hovering around 0°C (32°F) and reaching a comfortable average of 12°C (55°F), the days begin to bloom with life. The maximums can climb to a pleasant 27°C (82°F), inviting locals and tourists alike to enjoy the blossoming landscapes and outdoor activities. This month showcases a notable rise from the chilly averages of earlier months, reflecting the gradual awakening of spring. As May unfolds, Slovenia comes alive with vibrant colors and moderate temperatures, making it an ideal time for exploration and adventure.
In May, Slovenia experiences a notable surge in precipitation with an impressive 184 mm (7.3 in) of rain over 21 days, marking it as one of the wettest months of the year. This significant increase follows April's rainfall of 97 mm (3.8 in) and indicates the transition into summer, where the countryside thrives under the lush, verdant embrace of spring. As May's showers nurture the landscape, the frequency of rainy days underscores the dramatic shift in weather patterns typical of this time. This trend of heightened precipitation not only lays the groundwork for a vibrant blooming season but also highlights May's pivotal role in the overall climatic rhythm of Slovenia.
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 spring transitions into summer in Slovenia, May brings a notable spike in the UV Index, reaching a very high level of 8. This marks a significant increase from earlier months, with burn time decreasing to just 15 minutes for unprotected skin. Compared to April's more moderate Index of 6, May signals a shift towards more intense sun exposure, highlighting the importance of sun safety practices. As the days grow longer and warmer, it's essential for residents and visitors alike to be aware of UV levels. For more information on how to protect yourself, check the UV Index.
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As May arrives in Slovenia, it brings with it an impressive 352 hours of sunshine, a significant jump from the previous months. Following the steady increase from January's 170 hours, sunlight continues to pour in, with April already showcasing a burgeoning 329 hours. This upward trend indicates that spring is in full bloom, setting the stage for a vibrant summer. The brightness of June further elevates the atmosphere with 393 hours, highlighting the continued allure of Slovenia's warm, sun-soaked days. It’s clear that May not only marks the height of spring but also hints at the radiant months ahead, making it an ideal time for outdoor adventures and experiencing the stunning landscapes of this charming country.
In May, Slovenia experiences a 31% chance of sunny weather, mirroring the slightly higher likelihood observed in April. This transitional month often brings a fresh vibrancy to the landscape, but sunshine may be less abundant compared to the peak summer months. As the region moves towards June—when the chance of sunny days increases to 48%—May serves as a reminder of the unpredictable nature of spring weather. Despite this, the allure of blooming flowers and longer days still beckons, making it a delightful period for outdoor exploration, even if you should prepare for the possibility of overcast skies.
As spring gracefully transitions into summer, May in Slovenia is a delightful highlight, boasting 15 hours of daylight. This increase in daylight mirrors the gradual lengthening trend that begins in March with 11 hours and steadily rises through April's13 hours. After reaching its peak in May and maintaining this brightness through June and July, the daylight begins to wane, gently ushering in the shorter days of late summer and fall. As autumn approaches, the daylight diminishes to 12 hours in September, before tapering off to 10 hours in October. Thus, May stands as a pivotal month of brightness and warmth, marking the onset of longer, sun-kissed days in Slovenia.
In May, Slovenia experiences a gentle average wind speed of 1.9 m/s (4 mph), mirroring the mild conditions of April. Over the months leading into this spring month, there's a noticeable stability in wind patterns, with speeds consistently hovering around the 4 mph mark from January through April. After May, the winds tend to ease, with June dipping down to 1.6 m/s and gradually fluctuating further into the summer. This trend highlights late spring as a refreshing yet calm period, where the gentle breezes complement the blossoming landscapes, making it an ideal time for outdoor exploration and enjoying Slovenia's natural beauty.
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 minimum of 0°C (32°F) to a pleasant maximum of 27°C (82°F), with an average of 12°C (55°F). The month experiences considerable rainfall, with 184 mm (7.3 in) of precipitation over 21 days, alongside a humidity level of 74%. In contrast, January is markedly colder, featuring temperatures that plummet to a minimum of -22°C (-8°F) and only rise to a maximum of 11°C (53°F), averaging -2°C (28°F). Precipitation is significantly lower at 38 mm (1.5 in) over just 5 days, although humidity remains high at 91%. For a more detailed look at January conditions, visit weather in January.
May and February present strikingly different weather patterns, reflecting the transition from winter to spring. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 27°C (82°F) during the day, with an average of 12°C (55°F). In contrast, February experiences much colder conditions, with a minimum of -16°C (3°F) and an average temperature of just 1°C (34°F). Precipitation is also more prevalent in May, with 184 mm (7.3 in) falling over 21 days compared to February's 64 mm (2.5 in) over just 8 days. Additionally, May's humidity sits at 74%, while February's humidity is slightly higher at 87%, contributing to a noticeably different feel during each month. For more detailed information, check out the weather in February.
The weather in May presents a notable contrast to March, with more moderate temperatures and significantly higher rainfall. While March experiences a much colder range, with minimum temperatures plummeting to -17°C (1°F) and an average of only 4°C (39°F), May enjoys milder temperatures that start from a minimum of 0°C (32°F) and can rise to a comfortable maximum of 27°C (82°F). Additionally, May sees an increase in precipitation, totaling 184 mm (7.3 in) over 21 days compared to March's 66 mm (2.6 in) spread across 12 days. Interestingly, the humidity levels are relatively high in both months, with March at 82% and May at 74%. For more detailed information, you can check the weather in March.
When comparing the weather in May and April, we can observe notable differences in temperature and precipitation patterns. May generally experiences milder temperatures, with a minimum of 0°C (32°F) and an average of 12°C (55°F), while April is much colder, featuring a minimum of -15°C (6°F) and an average of 8°C (47°F). Despite having a similar maximum temperature of 26°C (78°F), May also brings significantly more precipitation, totaling 184 mm (7.3 in) over 21 days compared to April’s 97 mm (3.8 in) across 13 days. Additionally, humidity levels decrease slightly in May at 74%, compared to a higher 79% in April. For detailed insights, you can check the weather in April.
In comparing the weather between May and June, a noticeable shift in temperatures and conditions can be observed. May experiences a wider temperature range, with minimums as low as 0°C (32°F) and maximums reaching up to 27°C (82°F), while June’s temperatures are milder, with a minimum of 3°C (38°F) and a maximum of 33°C (92°F). Additionally, June average temperatures rise to 18°C (64°F) compared to May’s average of 12°C (55°F). Precipitation is also reduced in June, with 137 mm (5.4 in) over 17 days, compared to 184 mm (7.3 in) over 21 days in May. Despite these differences, humidity remains fairly consistent, peaking at 75% in June versus 74% in May. For more detailed information, you can check the weather in June.
In comparing the weather of May and July, we see notable differences in temperature and rainfall. May experiences a broader temperature range, with a minimum of 0°C (32°F) and a maximum of 27°C (82°F), averaging around 12°C (55°F). This month also sees considerable precipitation of 184 mm (7.3 in) over 21 days, contributing to a somewhat damp atmosphere.
In contrast, July brings warmer conditions, with temperatures ranging from a minimum of 7°C (45°F) to a peak of 31°C (88°F), averaging 19°C (66°F). Although July's precipitation is slightly lower at 175 mm (6.9 in) over 17 days, the overall humidity remains consistent at 74%. For more detailed information, you can check out the weather in July.
In May, the weather is characterized by a wider temperature range, with minimums dropping to 0°C (32°F) and maximums reaching 27°C (82°F). The month also sees significant precipitation, averaging 184 mm (7.3 in) over 21 days, alongside high humidity levels of 74%. In contrast, August enjoys milder conditions, with minimum temperatures starting at 6°C (43°F) and maximums peaking at 33°C (91°F). The total precipitation remains similar at 180 mm (7.1 in), but it occurs over fewer days (17), and the humidity is slightly lower at 68%. For more detailed information, you can check the weather in August.
When comparing the weather in May and September, both months exhibit mild temperatures, though September tends to be slightly warmer overall. May sees temperatures ranging from a minimum of 0°C (32°F) to a maximum of 27°C (82°F), with an average of 12°C (55°F). In contrast, September offers a minimum temperature of 0°C (31°F) and a max of 28°C (82°F), with an average of 14°C (57°F). Precipitation levels are also noteworthy; May experiences 184 mm (7.3 in) across 21 days, while September has slightly less, at 168 mm (6.6 in) over 14 days. Interestingly, both months share a humidity level of 74%. For more detailed information, you can check the weather in September.
May and October present contrasting weather patterns, reflecting the transition from spring to autumn. In May, temperatures fluctuate between a minimum of 0°C (32°F) and a maximum of 27°C (82°F), with an average of 12°C (55°F). This month experiences significant precipitation, totaling 184 mm (7.3 in) over about 21 days, accompanied by a humidity level of 74%. In comparison, October brings cooler conditions, with temperatures ranging from -2°C (29°F) to a maximum of 22°C (71°F) and an average of 9°C (49°F). Rainfall is notably lower at 78 mm (3.1 in) over 10 days, but humidity rises to 88%. For more details, you can check the weather in October.
May and November present distinctly different weather patterns. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 27°C (82°F), with an average of 12°C (55°F). This month sees a considerable amount of rainfall, totaling 184 mm (7.3 in) over 21 days, accompanied by a humidity level of 74%. In contrast, November experiences colder temperatures, with a minimum of -13°C (8°F) and a maximum of 19°C (67°F), averaging 4°C (40°F). Precipitation is lower in November at 106 mm (4.2 in) but occurs over fewer days, just 10. The humidity also increases to 90%, contributing to the chilly atmosphere. For more details, check the weather in November.
In May, the weather is characterized by milder temperatures, with a minimum of 0°C (32°F) and maximums reaching up to 27°C (82°F), averaging around 12°C (55°F). This month sees significant precipitation, totaling 184 mm (7.3 in) across approximately 21 days, resulting in relatively high humidity at 74%. In stark contrast, December experiences much colder conditions, with temperatures plunging to a minimum of -17°C (1°F) and averaging -1°C (30°F). The maximum temperature rarely exceeds 11°C (52°F), and precipitation is lower, at 88 mm (3.5 in) over just 10 days, accompanied by a higher humidity level of 89%. For a more detailed overview, you can check the weather in December.
As May unfolds, it ushers in a notable shift in weather patterns compared to the earlier months of the year. With temperatures climbing to an inviting maximum of 27°C (82°F), the warmth begins to permeate the crisp spring air. However, the month also brings a fair amount of rain, with many days showcasing cloudy skies and precipitation that contributes to a humid atmosphere. This mix of pleasant warmth and moisture fosters a vibrant landscape, setting the stage for the lush greenery of summer while still retaining remnants of spring’s chill. For a deeper understanding of how May weather compares and contrasts throughout the year, explore our Climate section.