Last updated: August 27, 2025
Experience the charm of Portorož, Slovenia, in December, where temperatures range from a mild 4°C (39°F) to a comfortable 16°C (60°F). The month offers an average temperature of 10°C (50°F), perfect for leisurely strolls along the coast. December brings a significant precipitation amount of 150 mm (5.9 in) over 13 rainy days, contributing to the region's lush greenery. With humidity levels at a notable 88%, visitors can expect a refreshing, coastal atmosphere, making it an ideal time to explore the unique beauty of this picturesque destination.
In December, Portorož, Slovenia, experiences a notable transition into winter, with temperatures averaging around 10°C (50°F). As the month unfolds, nighttime lows dip to about 4°C (39°F) while daytime highs reach a mild 16°C (60°F), signaling a departure from the cooler autumn months. This transition is consistent with the gradual drop in temperatures seen throughout the fall, making December a month of brisk yet manageable conditions. The climate remains relatively mild compared to earlier winter months, offering a unique opportunity to enjoy cozy walks along the coast or explore the charming local culture adorned with festive decorations. As the year wraps up, the cooler yet inviting weather sets the stage for a picturesque winter experience in this enchanting coastal town.
December in Portorož, Slovenia, wraps up the year with a notable increase in precipitation, measuring 150 mm (5.9 in) over 13 days of rain. This marks a slight decline from November's higher total of 183 mm (7.2 in) but continues the trend of significant late-autumn rainfall. The month’s precipitation plays a crucial role in replenishing local water sources as winter approaches. Notably, December's rainfall is nearly double that of summer months, such as July and August, which average only around 49 mm (1.9 in) to 58 mm (2.3 in). As winter settles in, the transition from lighter to heavier precipitation highlights the region's seasonal shifts, making December a pivotal month in Portorož's climatological pattern.
December in Portorož, Slovenia, sees a humidity level of 88%, closely mirroring the dampness of January and showing a significant rise from the drier months of July and August, where humidity dipped to 63% and 51%, respectively. This trend of higher humidity persists as the year shifts from the crisp autumn months, reflecting November's 89% humidity just before winter fully sets in. Overall, the data suggests that while summer brings a breath of fresh air, the colder months of December and January envelop Portorož in a much wetter atmosphere, creating a cozy and atmospheric feel for this charming coastal town.
In December, Portoroz, Slovenia experiences a significant drop in the UV Index, registering a low level of 2. This reduction marks the end of a sun-soaked summer season, where July reached its peak with an index of 9, indicating very high exposure levels. As temperatures cool, so does sun intensity, allowing for a safe outdoor experience with a burn time of 45 minutes. The transition from a summer paradise to a more subdued winter landscape reflects a broader trend of fluctuating UV exposure throughout the year in Portoroz, from low levels in winter to very high conditions during the peak summer months. For more detailed information, visit Portoroz UV Index.
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In December, Portorož enjoys a gentle fade into winter with 207 hours of sunlight, a decrease from the vibrant glow of summer but still a precious gift compared to the darker months that lie ahead. As we reflect on the year, it's clear that sunshine peaks in the height of summer with July’s impressive 430 hours, while the gradual decline in daylight hours during the colder months is noticeable. Yet, even December holds onto more light than the brisk January and February, hinting at the resilience of light in this coastal town. As the sun dips earlier, it invites cozy evenings by the sea, making Portorož a charming destination even as the year winds down.
In December, Portorož, Slovenia, experiences a mildly sunny disposition with a 36% chance of clear skies. This places it slightly above the preceding months, like November, which sees only a 35% chance of sunshine. While the winter season typically ushers in more overcast days, December's solar possibilities hint at a gradual shift toward brighter conditions as spring approaches. As the year winds down, travelers can still hope for those fleeting moments of sunlight amidst the cooler weather, providing a charming contrast to the festive atmosphere of the holiday season.
As the year winds down, December in Portorož, Slovenia, offers just 8 hours of daylight, marking the lowest point in the annual cycle. Following the summer months, which boast up to 15 hours of sunlight in June and July, a gradual decline occurs, mirroring the transition from vibrant May's 14 hours to the deeper shadows of late autumn. The shift from November’s 9 hours to December’s even shorter days emphasizes the stark contrast in seasonal light, inviting a reflective coziness during the winter months. As nature prepares for the rejuvenation of spring, the dwindling daylight serves as a reminder of the cyclical beauty of the changing seasons in this picturesque coastal town.
As the year draws to a close, December brings a gentle breeze to Portorož, Slovenia, with an average wind speed of just 3.3 m/s (7 mph). This marks a notable dip from the blustery November, which sees wind speeds rise to 5.2 m/s (12 mph), creating a transition from the more vigorous gusts of autumn to a calmer, more tranquil winter atmosphere. Throughout the year, wind speeds varied significantly, peaking in October, when they reached 5.0 m/s (11 mph). However, December's softer winds suggest a peaceful retreat as nature prepares for the cold months ahead. The fluctuation in wind patterns highlights not only the seasonal changes but also Portorož's unique coastal allure, where each month contributes to the region's distinctive climate tapestry.
Weather in Portoroz varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Portoroz, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit notable differences in weather patterns. In December, temperatures range from a mild minimum of 4°C (39°F) to a maximum of 16°C (60°F), with an average of 10°C (50°F). This month also sees considerable rainfall, totaling 150 mm (5.9 in) over 13 days, contributing to an overall humidity level of 88%. In contrast, January experiences cooler temperatures, with a minimum dropping to -3°C (27°F) and a maximum of 13°C (56°F), averaging around 7°C (46°F). Precipitation decreases significantly to 58 mm (2.3 in) over just 7 days, yet humidity remains constant at 88%. For more detailed information on weather specifics for January, you can check Portoroz weather in January.
When comparing the weather in December and February, we observe notable differences in temperature and precipitation. December features milder temperatures, with a minimum of 4°C and an average of 10°C, reaching up to 16°C. However, it is quite rainy, receiving 150 mm of precipitation over 13 days and maintaining a high humidity level of 88%. In contrast, February is cooler, with temperatures dipping to a minimum of -3°C, an average of 8°C, and a maximum of 13°C. The month is also drier, with only 106 mm of precipitation across 11 days and slightly lower humidity at 82%. For more specific details on February weather, you can refer to Portoroz weather in February.
In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 16°C (60°F), with an average temperature of around 10°C (50°F). The month is characterized by high humidity at 88% and considerable precipitation, totaling 150 mm (5.9 in) over approximately 13 days.
In contrast, March features more variable temperatures, with a minimum of -3°C (27°F) and a maximum of 16°C (62°F), while still maintaining an average of 10°C (50°F). The weather is generally drier, with only 57 mm (2.3 in) of precipitation across just 7 days and lower humidity at 73%.
To learn more about the weather specifics in March, you can check out Portoroz weather in March.
In December, the weather is cooler with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 16°C (60°F), accompanied by higher humidity at 88%. The month experiences significant precipitation, totaling 150 mm (5.9 in) over about 13 days, often resulting in a damp and chilly atmosphere.
In contrast, April brings a noticeable shift, with temperatures rising to an average of 13°C (56°F), peaking at 20°C (68°F). The increase in temperatures is paired with lower humidity at 73% and reduced precipitation of 86 mm (3.4 in) spread across just 8 days, creating a more pleasant and spring-like ambiance. For more details on April weather, you can visit Portoroz weather in April.
December weather tends to be significantly cooler and more humid compared to May. With minimum temperatures around 4°C (39°F) and an average of 10°C (50°F), December experiences a high of only 16°C (60°F). This month also brings considerable precipitation, totaling 150 mm (5.9 in) over 13 rainy days and a high humidity level of 88%. In contrast, May offers a milder climate, with minimum temperatures rising to 10°C (50°F) and averages reaching 17°C (64°F), peaking at a pleasant 24°C (76°F). This month sees less rainfall, totaling 105 mm (4.2 in), also over 13 days, but with lower humidity at 70%. For a detailed look at May weather, you can check Portoroz weather in May.
In December, the weather is notably cooler, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 16°C (60°F). This month also experiences higher precipitation, at 150 mm (5.9 in) over about 13 days, contributing to a humidity level of 88%. In contrast, June brings a much warmer climate, with temperatures varying from 16°C (61°F) to 30°C (86°F) and a significantly lower precipitation level of 68 mm (2.7 in) over just 5 days. The humidity drops to 69%, making June feel more comfortable and mild. For more detailed weather insights, visit Portoroz weather in June.
December and July present a striking contrast in weather conditions. In December, temperatures range from a chilly 4°C (39°F) at night to a mild 16°C (60°F) during the day, with an average of around 10°C (50°F). The month sees considerable precipitation, totaling 150 mm (5.9 in) over approximately 13 days, contributing to a high humidity level of 88%. In contrast, July brings much warmer weather, with temperatures starting at a minimum of 20°C (68°F) and peaking at 29°C (85°F), averaging around 25°C (77°F). Rainfall is minimal during this summer month, with only 49 mm (1.9 in) recorded over just 6 days and lower humidity levels at 63%. For those interested in specifics about July's weather, you can delve deeper at Portoroz weather in July.
In December, the weather is quite chilly with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 16°C (60°F) and an average of 10°C (50°F). The month is characterized by high humidity at 88% and considerable precipitation of 150 mm (5.9 in) over approximately 13 days. In contrast, August offers much warmer conditions, with temperatures ranging from a mild 17°C (63°F) to a hot 30°C (87°F) and an average temperature of 26°C (78°F). The summer month experiences significantly less rainfall, totaling just 58 mm (2.3 in) across about 6 days, and lower humidity at 51%. For more details on August weather specifics, you can check Portoroz weather in August.
When comparing the weather in December and September, notable differences emerge. December experiences much cooler temperatures, with a minimum of 4°C (39°F) and an average of 10°C (50°F), while September enjoys a warm range, featuring a minimum of 14°C (57°F) and an average of 22°C (71°F). Precipitation is slightly higher in September, totaling 171 mm (6.7 in) over 10 days, compared to December's 150 mm (5.9 in) over 13 days. Additionally, December boasts a significantly higher humidity level of 88%, contrasting with September's more comfortable 64%. For a detailed overview of the weather patterns in September, you can check Portoroz weather in September.
When comparing the weather in December and October, notable differences arise in temperature and precipitation. October enjoys milder conditions, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 23°C (73°F), while December sees cooler temperatures, peaking at 16°C (60°F). Additionally, October experiences less rainfall, with 100 mm (4.0 in) over 10 days, compared to December's 150 mm (5.9 in) over 13 days. Humidity levels are slightly lower in October at 83%, while December's humidity rises to 88%, resulting in a distinctly chillier and wetter atmosphere as the year closes. For more detailed information, you can explore Portoroz weather in October.
When comparing the weather between November and December, we notice a slight decrease in temperature and an increase in humidity. In December, the minimum temperature is 4°C (39°F), averaging 10°C (50°F), and reaching a maximum of 16°C (60°F). By contrast, November features slightly warmer temperatures with a minimum of 6°C (42°F), an average of 13°C (56°F), and a maximum of 19°C (67°F). While both months experience 13 days of precipitation, December has 150 mm (5.9 in) of rainfall, compared to November’s 183 mm (7.2 in). The humidity remains quite high throughout both months, with December's humidity at 88% and November's at 89%. For more detailed information, you can check out Portoroz weather in November.
As December descends upon Portoroz, the weather transforms into a cooler and more humid experience compared to other months of the year. With an average temperature around 10°C, residents and visitors alike will notice that brisk breezes replace the warmth of autumn. The month also brings an increase in precipitation, with rainfall occurring on about 13 days, setting a quieter, more introspective mood for this coastal town. Despite the chill and dampness, December's unique blend of elements offers a charming backdrop for those exploring the serene beauty of Portoroz. For a more detailed look at what to expect throughout the year, check out Portoroz Climate.