Last updated: August 27, 2025
December in Slovenia presents a striking contrast of weather conditions, showcasing a maximum temperature of 14°C (57°F) while the average drops to a chilly 1°C (34°F), with nighttime lows plunging to -17°C (1°F). This month is characterized by high humidity levels at 89% and significant precipitation totaling 100 mm (3.9 in), spread over approximately 10 days. As the landscape transforms under these varied conditions, December offers a unique blend of wintry charm and festive spirit, making it a captivating time to experience Slovenia's natural beauty.
In December, Slovenia transforms into a winter wonderland, with temperatures dipping significantly as the year comes to a close. The month sees a minimum temperature plummeting to -17°C (1°F), while the average hovers around a chilly 1°C (34°F). Daytime highs can reach up to 14°C (57°F), providing a brief respite from the biting cold, but overall, December is marked by its frosty nature. This trend of falling temperatures reflects Slovenia's transition into the heart of winter, setting the stage for snowy landscapes and festive holiday cheer. As the cold sets in, cozy fires and warm gatherings become essential, creating a picturesque atmosphere for both residents and visitors alike.
In December in Slovenia, the weather takes a notable turn, delivering an average precipitation of 100 mm (3.9 in) over approximately 10 rainy days. This month sees a dip from the previous high of 152 mm (6.0 in) in May, yet it remains among the wetter months of the year. Following a trend of increasing rainfall from earlier in the year, December’s precipitation is a crucial contributor to the landscape's winter vitality. As the year wraps up, the gradual shift towards colder temperatures and the consistent moisture hint at the rejuvenating effects of winter, making it a significant month in Slovenia’s climatic rhythm.
In December, Slovenia experiences a humidity level of 89%, marking a slight drop from the preceding months of October and November, which saw higher readings of 88% and 90%, respectively. This subtle dip aligns with a downward trend in humidity as the year progresses, reflecting the region's transition into winter. However, December's humidity remains notably high compared to the warmer months, such as August with its lowest average of 68%. As the year draws to a close, the consistent moisture in the air not only influences the climate but also contributes to Slovenia’s enchanting winter landscapes, making it a season of both comfort and charm.
In December, Slovenia experiences a low UV Index of 2, indicating minimal risk from sun exposure, with a burn time of 45 minutes. This trend of lower UV levels during the winter months is quite noticeable, contrasting with the peak summer months when values soared to 9. As the year progresses from winter into spring, UV exposure gradually increases, peaking in late spring and summer with very high levels that require far more caution. Fortunately, December's cooler temperatures and shorter days mean you can bask in the sunlight for longer without immediate worry. For further details on the UV Index throughout the year, check out the UV Index.
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In December, Slovenia experiences a gentle shift in daylight, with 199 hours of sunshine illuminating the winter landscape. This month serves as a bridge between the shorter days of fall and the longer hours that come with the arrival of spring. As temperatures drop, the sunshine hours begin to taper off from the peak of 414 hours in July, but the glow of December still manages to brighten the chilly atmosphere. Notably, December's sunlight slightly outshines the previous month, November, which recorded 187 hours. This increasing trend towards the end of the year hints at the gradual return of longer days, offering a warm reminder that brighter skies are just around the corner.
As December rolls in, the likelihood of sunny weather in Slovenia hovers around 32%, providing a modest chance of clear skies amidst the winter chill. While this percentage is a slight improvement from November's 23%, it still reflects the lower probability of sunshine characteristic of the colder months. Interestingly, the trend shows that as the year progresses, particularly moving from the autumn months into winter, the opportunity for sun dips, with less than half of the months from January to November reaching above a 35% chance. In contrast, the early spring months, especially March and April, reveal more optimism for sunshine, peaking at 55%. Thus, while December may not shine as brightly for sun-seekers, the gradual uptick from the previous month hints at a flicker of warmth as the year draws to a close.
As we move through the year in Slovenia, daylight duration reflects the changing seasons in a captivating rhythm. December, with its 8 hours of daylight, represents the twilight of the year, where the sun makes a brief but precious appearance. This marks a noticeable decrease from the more generous 14 hours in May and 15 hours during the summer months of June and July. The transition from the vibrant sunlit days of spring to the hibernation of winter is evident as daylight diminishes from 11 hours in March to the year's darkest days in December. The gradual shift highlights the beauty of seasonal variation, inviting reflections on the cozy charm of Slovenia's December while eagerly anticipating the return of longer days in the coming months.
As December settles in Slovenia, the winds ease to an average speed of 1.5 m/s (3 mph), mirroring the calming trends of the cooler months. Throughout the year, wind speeds have remained fairly consistent, hovering around the 1.5 to 1.9 m/s range, with January witnessing the highest at 1.6 m/s (4 mph). A subtle decline is observed as spring transitions into summer, notably dipping in August to its lowest point of 1.4 m/s (3 mph). Yet, as autumn unfolds into winter, the winds maintain a gentle rhythm, with December's breeze reflecting the serene chill of the season. This consistent wind pattern enhances Slovenia's picturesque landscape, providing a tranquil backdrop as the year comes to a close.
Weather in varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in , focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January both present cold winter weather, but they have distinct characteristics. In December, temperatures can drop to a minimum of -17°C (1°F) and reach an average of 1°C (34°F), with maximums of up to 14°C (57°F). This month sees more precipitation, totaling 100 mm (3.9 in) over approximately 10 days, along with high humidity levels at 89%. In contrast, January experiences slightly milder temperatures, with a minimum of -16°C (3°F) and an average of 0°C (32°F), peaking at 12°C (54°F). Precipitation is significantly reduced to 41 mm (1.6 in) over just 6 days, and the humidity increases slightly to 91%. For a more detailed view, you can explore weather in January.
December and February exhibit notable differences in weather conditions. December typically experiences lower temperatures, with a minimum of -17°C (1°F) and an average of 1°C (34°F), while February sees slightly warmer temperatures, starting at a minimum of -14°C (7°F) and averaging around 3°C (37°F). Precipitation is more significant in December, totaling 100 mm (3.9 in) over approximately 10 days, in contrast to February's 72 mm (2.8 in) across 8 days. Humidity levels remain relatively high in both months, with December at 89% and February slightly lower at 87%. For more detailed information, you can check the weather in February.
December and March present quite different weather experiences, despite their close proximity on the calendar. In December, temperatures can plummet as low as -17°C (1°F), with an average hovering around 1°C (34°F) and reaching a maximum of 14°C (57°F). The month is marked by considerable precipitation, totaling around 100 mm (3.9 in) over about 10 days, coupled with high humidity levels at 89%.
In contrast, March ushers in a noticeable warming trend, with minimum temperatures slightly higher at -15°C (5°F) and an average rising to 5°C (42°F). It reaches a maximum of 21°C (71°F) during the day, offering a more temperate climate. Precipitation decreases to 63 mm (2.5 in) across the same number of days, and the humidity drops to 82%. For more details on the weather specifics, you can explore weather in March.
In December, temperatures can plummet to a minimum of -17°C (1°F), with an average around 1°C (34°F) and highs reaching only 14°C (57°F). The month is characterized by high humidity at 89%, contributing to a chilly atmosphere. Precipitation is significant, totaling 100 mm (3.9 in) over about 10 days. In contrast, April brings a noticeable warming trend, with minimum temperatures around -9°C (16°F) and an average of 10°C (50°F), peaking at a pleasant 25°C (78°F). Although precipitation is slightly less at 93 mm (3.7 in), it occurs over 12 days, and humidity decreases to 79%. For more details, check out the weather in April.
December and May present contrasting weather conditions. In December, temperatures can drop as low as -17°C (1°F), with an average temperature around 1°C (34°F) and highs reaching only up to 14°C (57°F). This month also experiences significant precipitation, totaling 100 mm (3.9 in) over about 10 days, coupled with high humidity at 89%. In stark contrast, May sees much milder temperatures, with a minimum of 0°C (32°F), an average of 14°C (57°F), and maximums climbing to 28°C (82°F). Furthermore, May has a higher total precipitation of 152 mm (6.0 in) spread over 19 days, but the humidity drops to a more comfortable 74%. For more details, check out the detailed weather in May.
December and June showcase stark contrasts in weather conditions. In December, temperatures can plunge as low as -17°C (1°F), with an average temperature around 1°C (34°F) and a maximum that reaches only 14°C (57°F). The month experiences substantial precipitation of about 100 mm (3.9 in) over approximately 10 days, coupled with high humidity levels of 89%. In contrast, June brings a much milder climate, with temperatures ranging from a minimum of 5°C (41°F) to an average of 19°C (67°F) and a peak of 34°C (93°F). While June sees slightly less precipitation at 90 mm (3.5 in), it has more rainy days, totaling 15, yet the humidity is notably lower at 75%. For more detailed information on the weather in June, you can visit weather in June.
December and July present stark contrasts in weather conditions. In December, temperatures can plunge to a minimum of -17°C (1°F) and average around 1°C (34°F), with a maximum of 14°C (57°F). This month also sees significant precipitation, totaling 100 mm (3.9 in) over 10 days, accompanied by high humidity levels of 89%. Conversely, in July, the climate warms up considerably, with minimum temperatures of 10°C (50°F) and an average of 20°C (69°F), peaking at 32°C (91°F). Although July experiences slightly more rainfall at 121 mm (4.8 in) over 15 days, the humidity is lower at 74%, making for a more comfortable atmosphere overall. For more detailed information, you can check the weather in July.
The weather in December is characterized by its cold temperatures, with minimums plunging to -17°C (1°F) and an average temperature around 1°C (34°F), while highs reach only 14°C (57°F). In contrast, August enjoys much warmer conditions, with temperatures ranging from a minimum of 8°C (46°F) to a high of 35°C (96°F), and an average of 21°C (69°F). Both months see a comparable amount of precipitation, with December recording 100 mm (3.9 in) over 10 days and August slightly higher at 114 mm (4.5 in) over 14 days. Additionally, December's humidity sits at a chilly 89%, while August is more comfortable at 68%. For more detailed insights, you can check the weather in August.
In December, temperatures can drop as low as -17°C (1°F), with an average of around 1°C (34°F) and occasional highs of 14°C (57°F). The month sees significant precipitation, totaling about 100 mm (3.9 in) over 10 days, coupled with high humidity at 89%. In contrast, September enjoys milder weather, featuring minimum temperatures of 1°C (33°F) and average highs reaching 29°C (85°F). Although slightly wetter, with 139 mm (5.5 in) of rain over 13 days, September experiences lower humidity at 74%. For more details on the weather during that month, check out the weather in September.
December weather tends to be much colder than October, with average temperatures hovering around 1°C (34°F) compared to 11°C (51°F) in October. The minimum temperatures drop significantly in December to -17°C (1°F), while October experiences milder lows at -1°C (31°F). Although both months see similar precipitation days—10 days in December and 9 in October—the total rainfall is slightly higher in December at 100 mm (3.9 in) compared to 80 mm (3.2 in) in October. Humidity levels are fairly consistent, with December at 89% and October at 88%. For a more detailed view of what to expect in October, you can check the weather in October.
In December, the weather takes a notable turn compared to November, with temperatures dropping significantly, featuring a minimum of -17°C (1°F) and an average of just 1°C (34°F), whereas November boasts milder temperatures, ranging from a minimum of -8°C (17°F) to an average of 6°C (43°F). While precipitation levels are somewhat lower in December at 100 mm (3.9 in), compared to November's 118 mm (4.6 in), both months experience rainfall on approximately 10 days. Humidity remains high in both months, with December at 89% and November at 90%, contributing to the crispness of the air as winter fully sets in. For a more detailed look at the climate in November, you can visit weather in November.
As December rolls in, it brings a distinct chill that sets it apart from the milder months of the year. With an average temperature hovering around 1°C (34°F) and the potential for lows reaching a frosty -17°C (1°F), this month marks a sharp departure from the temperate conditions of earlier seasons. The high humidity of 89% combines with around 100 mm of precipitation, leading to a mix of rain and snow that transforms the landscape into a winter wonderland. While other months may welcome the warmth of sunshine, December’s crisp air and frequent precipitation create a unique atmosphere, perfect for those who revel in the colder months. For a deeper understanding of how December fits into the broader climate trends, check out our detailed Climate page.