Last updated: August 27, 2025
December in Slovenia presents a chilly yet captivating winter landscape, marked by an average temperature of 2°C (36°F) and fluctuating between a maximum of 14°C (58°F) and a bone-chilling minimum of -15°C (6°F). The month experiences a significant 121 mm (4.8 in) of precipitation over approximately 10 days, resulting in a humid atmosphere with an average humidity level of 88%. This combination of cold temperatures and moisture creates a picturesque setting, ideal for winter activities and enjoying the enchanting beauty of Slovenia's seasonal charm.
As December settles in Slovenia, temperatures begin to dip, capturing the essence of winter. With minimums plunging to around -15°C (6°F), the month showcases a stark contrast to the milder weather of earlier months. The average temperature hovers around 2°C (36°F), providing a chilly backdrop for festive celebrations. Maximums reach a comfortable 14°C (58°F), offering brief moments of warmth amidst the cold. This pattern highlights a notable decline, as Slovenia transitions from the milder autumn months into the heart of winter, creating an enchanting atmosphere perfect for seasonal activities and cozy gatherings.
In December, Slovenia experiences a notable shift in its precipitation patterns, receiving an average of 121 mm (4.8 in) of rainfall over 10 days. This marks a dip compared to the heavier rainfall seen in May and September, yet still reflects a robust winter climate. The month serves as a transition, bridging the wetter autumn months and the drier start of the new year. With temperatures dropping, December precipitation often comes in the form of snow in higher elevations, transforming the landscape into a winter wonderland while contributing to the overall annual totals. This leads to a cozy atmosphere perfect for enjoying seasonal festivities amidst Slovenia's stunning natural backdrop.
In December, Slovenia experiences a humidity level of 88%, reflecting a trend that sees the final month of the year nearly mirroring January’s high of 88%. This sharp rise in humidity starts in October at 83%, peaks in November, and maintains a constant presence as the year draws to a close. Interestingly, while warmer months like July and August showcase much lower humidity levels—at 63% and 51% respectively—the onset of winter brings humidity back to higher proportions. As the cold sets in, the atmosphere becomes noticeably more humid, contrasting with the drier summer months and creating a brisk yet moist climate perfect for cozy winter experiences.
As December rolls into Slovenia, the UV Index drops to 2, placing it in the low exposure category with a burn time of 45 minutes. This trend marks a significant shift from the preceding summer months, where the Index surged to 9, indicating very high UV levels and a much shorter burn time of just 15 minutes. The gradual decline starting from November, when the Index reached 3, reflects a seasonal shift towards lower sun intensity and cooler climates. As the year closes, those venturing outdoors can enjoy longer safe exposure times, making December the perfect month for leisurely winter activities without the worry of sunburn. For a detailed understanding of UV levels throughout the year, check out the UV Index.
UV Risk Categories
In December, Slovenia enjoys a modest 209 hours of sunshine, marking a slight dip from the preceding months but still holding its own in the winter landscape. The sunshine hours in December gently reflect a decrease from the vibrant autumn months, with October and November offering 286 and 212 hours respectively. Despite the chill of winter setting in, this month’s sunlight signifies the gradual transition into the colder season, where the diminishing day length contrasts with the bountiful light of spring and summer, peaking in July with a radiant 427 hours. As Slovenia embraces December’s serene beauty, the soft winter sun offers a warm glow, inviting residents and visitors alike to celebrate the seasonal shift.
In December, Slovenia experiences a 29% chance of sunny weather, a slight improvement from the gloomier months preceding it. As the year progresses, the likelihood of sunshine starts low in January at 23%, peaks in March with 58%, then varies throughout the summer before dipping back down as winter approaches. With November showing only a 24% chance, December’s percentage indicates a minor uptick—though still modest. The overall trend reveals that while Slovenia's winter months may not boast frequent sun, December offers a glimmer of hope for those seeking brighter days amidst the chill.
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.
In December, Slovenia experiences the calmest winds of the year, with an average speed of just 1.6 m/s (4 mph). This fall in wind activity marks a notable trend as the colder months settle in, following more brisk autumn breezes. From the early months of the year, where speeds hover around 2.0-2.5 m/s, a gradual decline leads to the gentle gusts of late fall and winter. The decreasing wind speed continues from October to December, indicating a serene atmosphere ideal for cozy winter gatherings. As snow blankets the picturesque landscape, the quieter winds contribute to the tranquil charm that defines Slovenia in the heart of winter.
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.
In December, temperatures can drop as low as -15°C (6°F), with an average of 2°C (36°F) and a maximum reaching 14°C (58°F). This month sees significant precipitation, totaling 121 mm (4.8 in) over about 10 days, maintaining a consistent humidity level of 88%. In contrast, January experiences slightly milder temperatures, with a minimum of -12°C (11°F) and an average of 1°C (34°F), peaking at 12°C (54°F). Precipitation decreases to 51 mm (2.0 in) over 7 days, while humidity remains steady at 88%. For more details, you can check out the weather in January.
December and February showcase distinct weather characteristics, with December typically colder and more humid. In December, temperatures range from a minimum of -15°C (6°F) to a maximum of 14°C (58°F), averaging around 2°C (36°F). This month experiences significant precipitation, totaling 121 mm (4.8 in) over approximately 10 days, and an average humidity of 88%. In contrast, February sees slightly milder conditions, with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 19°C (67°F), averaging 4°C (39°F). Precipitation decreases to 88 mm (3.5 in) over about 9 days, and humidity dips slightly to 82%. The overall climate transition from December to February indicates a gradual warming trend as winter begins to fade. For more details, check the weather in February.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -15°C (6°F) to a maximum of 14°C (58°F), and an average of around 2°C (36°F). The month sees a significant amount of precipitation, totaling 121 mm (4.8 in) over about 10 days, and the humidity levels are notably high at 88%. In contrast, March offers a milder climate, with temperatures increasing to a minimum of -14°C (8°F) and rising to a maximum of 22°C (71°F), averaging 6°C (43°F). Precipitation in March is lighter at 71 mm (2.8 in), also spread over 10 days, and the humidity drops to a more comfortable 73%. For more detailed insights, check out the weather in March.
In December, the weather is characterized by significantly colder temperatures, with a minimum of -15°C (6°F) and an average of just 2°C (36°F). The month sees a considerable amount of precipitation, totaling 121 mm (4.8 in) over about 10 days, alongside high humidity at 88%. In contrast, April ushers in a milder climate, with temperatures ranging from a minimum of -11°C (13°F) to a pleasant average of 10°C (51°F) and a maximum of 26°C (79°F). Although April experiences slightly less precipitation at 94 mm (3.7 in) over 12 days, the humidity drops to a more comfortable 73%. For more details on this month’s conditions, you can check the weather in April.
In December, temperatures can dip as low as -15°C (6°F), with an average of just 2°C (36°F) and maximums reaching 14°C (58°F). The month is characterized by high humidity at 88% and precipitation of 121 mm (4.8 in) over about 10 days. In contrast, May sees a significant warming trend, with minimum temperatures around 1°C (34°F), average highs of 14°C (58°F), and maximum temperatures that can climb to 28°C (82°F). The precipitation in May increases to 166 mm (6.5 in) spread over 19 days, albeit with lower humidity at 70%. For a closer look at the dynamic weather patterns, check out weather in May.
December and June present stark contrasts in weather conditions. In December, temperatures can plummet as low as -15°C (6°F) while averaging around 2°C (36°F), with a maximum of 14°C (58°F). The month is characterized by considerable precipitation, totaling 121 mm (4.8 in) over about 10 days, paired with high humidity levels of 88%. In contrast, June boasts a much milder climate, with minimum temperatures of 6°C (43°F) and an average of 20°C (68°F), reaching up to 34°C (94°F). This month experiences less precipitation at 84 mm (3.3 in) over roughly 12 days, accompanied by lower humidity at 69%. For a deeper look at conditions during June, check out weather in June.
December and July present a stark contrast in weather conditions. In December, temperatures can plummet as low as -15°C (6°F), with an average of around 2°C (36°F) and highs reaching only 14°C (58°F). This month also experiences significant precipitation, totaling 121 mm (4.8 in) over approximately 10 days, coupled with high humidity levels of 88%. In contrast, July boasts much warmer weather, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 34°C (93°F) and an average of 21°C (70°F). Although July has slightly less precipitation at 98 mm (3.9 in) over about 13 days, the humidity is considerably lower at 63%. For further details, you can explore weather in July.
December and August present a stark contrast in weather conditions. In December, temperatures can plunge to a minimum of -15°C (6°F), with an average temperature around 2°C (36°F) and a maximum of 14°C (58°F). The month is marked by high humidity levels of 88% and significant precipitation, averaging 121 mm (4.8 in) over approximately 10 days. In contrast, August offers a much warmer climate, with temperatures ranging from a comfortable minimum of 8°C (47°F) to a considerable maximum of 35°C (96°F), averaging around 21°C (70°F). While August also experiences some rainfall, totaling 100 mm (3.9 in), it sees slightly more precipitation days at 12, but notably lower humidity at 51%. For more details, you can check the weather in August.
In December, temperatures can drop dramatically, with minimums reaching -15°C (6°F) and an average of around 2°C (36°F), while highs only reach up to 14°C (58°F). The month is characterized by higher humidity at 88% and considerable precipitation, totaling 121 mm (4.8 in) over about 10 days. In contrast, September offers a much milder climate, with temperatures ranging from a minimum of 2°C (35°F) to a comfortable maximum of 29°C (85°F), and an average of 16°C (61°F). Although September receives more rainfall, totaling 159 mm (6.3 in) over 12 days, the overall experience is more pleasant with lower humidity at 64%. For more details, you can check the weather in September.
In comparing the weather between December and October, December is significantly colder, with temperatures ranging from a frigid -15°C (6°F) to a warmer 14°C (58°F), while October enjoys milder temperatures that span from 0°C (31°F) to 24°C (76°F). Additionally, December experiences higher precipitation levels at 121 mm (4.8 in) over approximately 10 days, compared to October’s 98 mm (3.9 in) across 9 days. Humidity is slightly higher in December at 88%, contrasted with October's 83%. For more detailed information on October weather, you can check weather in October.
In December, temperatures experience a more significant drop compared to November, with minimums reaching as low as -15°C (6°F) and an average of 2°C (36°F), while November's temperatures range from a minimum of -6°C (22°F) to an average of 6°C (44°F). Although December sees slightly less precipitation at 121 mm (4.8 in) over 10 days, compared to November's 131 mm (5.2 in) over 11 days, the humidity remains quite high in both months, with December at 88% and November at 89%. Overall, December tends to feel colder and more frigid, while November offers milder temperatures before the winter sets in. For more detailed insights, you can view the weather in November.
As December arrives, the weather undergoes a striking transformation, distinguishing itself from the milder months that precede it. With colder daytime temperatures and nighttime lows often dipping well below freezing, the month brings a chill that blankets the landscape in frost and sometimes snow. The increased humidity at 88% and the frequency of precipitation—averaging 10 days of rain or snow—add to the stark chill, creating a damp atmosphere. This wintry environment not only alters daily life but also invites a host of seasonal activities, making December a unique chapter in the climate narrative. For further insights into how December weather fits into the broader climatic patterns, check out Climate.