December Weather in Sinaia, Romania

Last updated: August 27, 2025

December in Sinaia, Romania, presents a striking winter landscape, where temperatures fluctuate between a maximum of 14°C (57°F) and a minimum of -17°C (2°F), setting an average around 0°C (31°F). Visitors can expect a humid environment with levels reaching 88%, contributing to the crisp, cold air typical of the season. Over the month, precipitation totals 77 mm (3.0 in), spread across 10 rainy or snowy days, adding to the enchanting winter charm of the region. Whether you're exploring the breathtaking Carpathian scenery or enjoying the local sights, January promises a magical experience in this picturesque mountain town.

December Temperature in Sinaia

In December, Sinaia, Romania, embraces the depths of winter, with temperatures that reflect its alpine charm. The month sees minimum temperatures plunging to -17°C (2°F), while the average hovers around 0°C (31°F), offering a stark contrast to the milder months preceding it. Daytime highs reach a comfortable 14°C (57°F), providing a brief respite from the chill. This notable drop in temperature underscores a clear trend as the year progresses, transitioning from the crisp autumn leftover into a wintry landscape perfect for skiing and cozy mountain retreats. As December unfolds, Sinaia transforms into a picturesque winter wonderland, inviting visitors to revel in its snowy allure.

December Weather in Sinaia: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sinaia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sinaia, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec263136445461646557473931
Data source: Temperature data for Sinaia generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Sinaia

In December, Sinaia experiences a notable increase in precipitation, with an average of 77 mm (3.0 in) spread over 10 days. This uptick marks a transition into the winter season, contributing to the region's scenic snowy landscapes. Compared to the preceding months, December's rainfall is higher, reflecting a shift from the relatively drier conditions of autumn. As temperatures drop, the precipitation often takes the form of snow, enhancing the charm of this picturesque mountain town. The increase in both the amount and the number of rainy days signals a shift towards the wetter months of the year, paving the way for the winter sports season and the holiday festivities that draw visitors to Sinaia.

December Precipitation Trends in Sinaia

The chart displays monthly precipitation patterns in Sinaia, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Sinaia, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec4044646313518614110441704577
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sinaia

In Sinaia, Romania, December ushers in a return to high humidity levels, peaking at 88%, mirroring January's damp conditions. This month marks a significant shift from the summer months, where humidity drops to a comfortable low of 48% in August. As the seasons transition, we observe a gradual increase, with November also recording elevated humidity at 87%, followed closely by December's figures. The trend showcases a winter season characterized by consistent moisture levels, reminiscent of the earlier months of the year. Overall, December serves as a reminder of the chill in the air, where the combination of cool temperatures and high humidity can create a crisp, refreshing atmosphere in this picturesque mountain town.

December Average Humidity in Sinaia

This chart illustrates the average monthly humidity levels in Sinaia, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Sinaia is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%85%82%73%71%70%66%48%57%79%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sinaia

In Sinaia, Romania, the UV Index in December settles at a low level of 2, indicating minimal sun exposure risk, which allows for a comfortable burn time of 45 minutes. This value reflects a significant dip from the peak summer months, showcasing a clear pattern of seasonal change. Following a trend from January's low exposure category, December continues to prioritize caution against sunburn, particularly as ski season approaches. As the year progresses, the UV Index rises dramatically from moderate levels in early spring, soaring to a remarkable 9 during the summer months where burn times plunge to just 15 minutes. This striking variation underscores the importance of monitoring UV levels year-round, emphasizing the need for sun protection strategies tailored to seasonal shifts. For more detailed information, visit Sinaia UV Index.

Maximum UV Index Levels in Sinaia for December

The chart shows the monthly maximum UV Index (UVI) for Sinaia in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Sinaia typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789997532
Data source: Sinaia December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Sinaia

In Sinaia, Romania, December brings a gentle transition into winter with approximately 190 hours of sunshine. While this marks a dip from the brighter months preceding it, the trend of daylight remains notable; the region experiences its peak sunshine in the summer, with July boasting a remarkable 420 hours. As the year winds down, it's clear that Sinaia enhances its charm through shorter, yet still delightful, sunny days. As December unfolds, the contrast of sunshine against the backdrop of snow-capped peaks offers a unique beauty, inviting visitors to embrace the serene winter landscape. Despite the decrease in daylight, the opportunities for exploration and appreciation of the natural beauty remain abundant in this picturesque mountain town.

Monthly Sunshine Duration in Sinaia: December Highlighted

The December sunshine duration represents the total number of hours Sinaia experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec173h230h288h342h384h398h420h402h337h284h219h190h
Data source: Sinaia December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sinaia During December

In Sinaia, Romania, the likelihood of enjoying sunny weather in December is relatively low, with only a 22% chance of sunshine. This figure reflects a trend of diminishing sunshine hours as the year draws to a close; for instance, December offers significantly less sun compared to the summer months, where July and August boast probabilities of 54% and 55% respectively. As the seasons change, there’s a noticeable decrease in sunny days, particularly in the later autumn months like November at 32%. Travelers looking to experience a bright and beaming December in Sinaia might want to temper their expectations, as the sun takes a back seat to the wintry charm of snow-laden landscapes instead.

Percentage of Sunny Days in December in Sinaia

The chart illustrates the percentage of sunny days in Sinaia throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sinaia experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%39%37%35%38%36%54%55%47%40%32%22%
Data source: Sinaia December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sinaia in December

In Sinaia, Romania, the rhythm of daylight gradually ebbs as the year draws to a close, with December offering just 8 hours of sunlight per day. This reduction marks the lowest point in a natural cycle where daylight peaks in June at 15 hours. Following the vibrant and long days of summer, a notable decline begins in August, settling into the shorter days of fall and winter. As the year progresses from November's 9 hours to December's twilight hours, the cozy atmosphere of the holiday season is complemented by early evenings and the enchanting beauty of the snow-covered landscape. Looking ahead, daylight will slowly begin to lengthen again in January, as nature prepares for the renewal of spring.

Average Daylight Hours in Sinaia for December

The chart illustrates the variation in daylight duration in Sinaia throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 10m10h 24m11h 56m13h 31m14h 52m15h 33m15h 11m14h12h 28m10h 54m9h 31m8h 48m
Data source: Sinaia daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Sinaia

As December arrives in Sinaia, Romania, the December winds breathe a gentle strength into the wintry landscape, with an average wind speed of 2.1 m/s (5 mph). This slight uptick from the preceding months hints at a subtle transition, as the winds have generally hovered around the 2.2 m/s mark from January to May, only dipping in the warmer months of summer. Interestingly, while the wind typically calms during the heat, December’s breezes reclaim a sense of briskness, reflecting the switch from autumn to winter. As the year closes, these winds can invigorate the air, making the snow-dusted surroundings feel alive, inviting those to embrace the chilly beauty of the season.

Average December Wind Speed in Sinaia

The chart displays monthly wind speed patterns in Sinaia, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.22.21.92.21.91.81.81.71.91.92.1 m/s
Data source: Sinaia December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Sinaia Compares to Other Months

Weather in Sinaia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sinaia, focusing on differences in temperature, rainfall, humidity, and UV levels.

In December, temperatures range from a chilling minimum of -17°C (2°F) to a mild maximum of 14°C (57°F), with an average temperature hovering around 0°C (31°F). The month sees significant precipitation, totaling 77 mm (3.0 in) over about 10 days, while humidity remains high at 88%. In contrast, January experiences colder conditions, with minimum temperatures dropping to -21°C (-5°F) and an average of -3°C (26°F). The maximum temperature also decreases to 9°C (49°F), and there is a marked reduction in precipitation to 40 mm (1.6 in) over 7 days, although the humidity stays the same at 88%. This notable drop in temperature and precipitation reflects the deepening winter conditions. For a detailed view of January weather, you can visit Sinaia weather in January.

When comparing the weather in December and February, we see notable differences in temperature and precipitation. December experiences a milder average temperature of around 0°C (31°F), with a maximum of 14°C (57°F) and a minimum of -17°C (2°F). In contrast, February is slightly colder, with an average of -1°C (31°F), a maximum of 16°C (62°F), and a minimum of -19°C (-1°F). In terms of precipitation, December sees more rainfall, totaling 77 mm (3.0 in) over 10 days, while February has less precipitation at 44 mm (1.7 in) across 9 days. Humidity levels are also comparable, with December at 88% and February slightly lower at 85%. For more detailed insights on February weather, you can refer to Sinaia weather in February.

December and March present notably contrasting weather patterns despite their proximity in the calendar year. In December, temperatures range from a chilling minimum of -17°C (2°F) to a mild maximum of 14°C (57°F), averaging 0°C (31°F). The month experiences high humidity at 88% and receives about 77 mm (3.0 in) of precipitation over roughly 10 days. In contrast, March shows a slight increase in temperatures, with a minimum of -16°C (4°F) and a maximum reaching 20°C (67°F), leading to an average of 2°C (36°F). Precipitation decreases to 64 mm (2.5 in) over 11 days, and humidity drops to 82%. This comparison highlights the gradual warming trend as winter transitions into spring. For more details on the specific conditions, you can visit Sinaia weather in March.

December and April present distinctly different weather patterns. In December, temperatures can dip as low as -17°C (2°F), with an average of around 0°C (31°F) and a maximum of 14°C (57°F). The month experiences about 77 mm (3.0 in) of precipitation over roughly 10 days, accompanied by high humidity at 88%. In contrast, April brings a milder climate with minimum temperatures of -11°C (13°F) and averages around 7°C (45°F), peaking at 23°C (74°F). Precipitation is slightly lower at 63 mm (2.5 in) over 11 days, and humidity drops to 73%. This transition reflects the shift from winter's chill to spring's blossoming warmth. For more detailed insights, check out Sinaia weather in April.

December weather contrasts sharply with that of May, showcasing the distinct seasonal shifts. In December, temperatures can plummet to a chilling minimum of -17°C (2°F), with an average hovering around 0°C (31°F) and a maximum of 14°C (57°F). The month is marked by significant precipitation of 77 mm (3.0 in) spread over about 10 days, and humidity levels are a high 88%. In contrast, May brings a refreshing warmth, with temperatures ranging from a minimum of -1°C (31°F) to an average of 12°C (54°F) and a pleasant maximum of 24°C (76°F). However, it is wetter than December, seeing 135 mm (5.3 in) of precipitation over 18 days, while humidity decreases to a more comfortable 71%. For a closer look at the weather specifics in Sinaia during this beautiful month, check out Sinaia weather in May.

December weather is characterized by cold temperatures, with minimums plunging to -17°C (2°F) and an average around 0°C (31°F). The month sees about 77 mm (3.0 in) of precipitation, spread over approximately 10 days, contributing to a high humidity level of 88%. In contrast, June offers a much milder climate, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 28°C (83°F) and an average of 16°C (61°F). Although June experiences more precipitation, totaling 186 mm (7.3 in) over 23 days, the humidity is relatively lower at 70%. For more information about June weather specifically, visit Sinaia weather in June.

In December, the weather is quite chilly, with temperatures ranging from a minimum of -17°C (2°F) to a maximum of 14°C (57°F) and an average of 0°C (31°F). The month is characterized by high humidity at 88%, resulting in a cold, damp atmosphere, with precipitation occurring on about 10 days for a total of 77 mm (3.0 in). In contrast, July boasts much warmer temperatures, with a minimum of 7°C (44°F) and a maximum of 29°C (85°F), averaging 18°C (64°F). Although July is wetter, with 141 mm (5.6 in) of precipitation over 20 days, the humidity is lower at 66%, leading to a more comfortable feel compared to the wintry December conditions. For more details on the July weather, you can check Sinaia weather in July.

The weather in December contrasts sharply with that of August, reflecting the distinct seasonal variations. December temperatures can plunge as low as -17°C (2°F), with an average around 0°C (31°F) and a maximum of 14°C (57°F), while August enjoys much milder conditions with minimums of 5°C (41°F), averages of 18°C (65°F), and highs reaching up to 31°C (88°F). Precipitation is also noteworthy, with December receiving 77 mm (3.0 in) over approximately 10 days, compared to August's 104 mm (4.1 in) spread over 13 days. Furthermore, humidity in December remains high at 88%, delivering a crisp, cold atmosphere, in stark contrast to the relatively comfortable 48% humidity typical of August. For more details on the warm August climate, visit Sinaia weather in August.

In December, the weather is characterized by significantly colder temperatures, with a minimum dipping to -17°C (2°F) and an average of around 0°C (31°F), culminating in a maximum of 14°C (57°F). The month also sees higher humidity levels at 88%, accompanied by 77 mm (3.0 in) of precipitation over about 10 days. In contrast, September enjoys milder temperatures, ranging from a minimum of -3°C (27°F) to a much warmer maximum of 29°C (84°F), with an average temperature of 14°C (57°F). The precipitation is notably less at 41 mm (1.6 in) over 8 days, and the humidity is lower at 57%. Overall, December presents a much harsher and wetter climate compared to the more temperate and drier conditions of September, making Sinaia weather in September a more pleasant experience for outdoor activities.

When comparing the weather in December to October, it’s clear that December experiences significantly colder temperatures, with a minimum of -17°C (2°F) compared to October's milder minimum of -4°C (25°F). The average temperature in December hovers around 0°C (31°F), while October enjoys a more pleasant average of 9°C (48°F). Additionally, October sees higher maximum temperatures, reaching up to 23°C (74°F) versus December's peak of 14°C (57°F). Precipitation levels are similar, with December receiving slightly more at 77 mm (3.0 in) over 10 days compared to October's 70 mm (2.7 in) over 9 days. Humidity is also higher in December at 88%, compared to October's 79%. For more detailed information on October weather specifically, you can visit Sinaia weather in October.

In December, temperatures drop significantly compared to November, with minimums reaching as low as -17°C (2°F) and average temperatures lingering around 0°C (31°F). In contrast, November offers a milder climate, with averages around 4°C (39°F) and maximums peaking at 22°C (72°F). Precipitation also increases in December to 77 mm (3.0 in), compared to just 45 mm (1.8 in) in November, although both months experience precipitation on about 10 days. Humidity levels remain similar, with December at 88% and November at 87%. For a more detailed look at the weather in November, check out Sinaia weather in November.

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Conclusion: What to Expect From December Weather in Sinaia

December in Sinaia marks a distinct transition into winter, with temperatures dipping significantly compared to the milder months preceding it. As the landscape transforms into a winter wonderland, the average chill sets in, and the occasional snowfall adds to the allure of the season. With increased humidity and relatively high precipitation, December is one of the wetter months, often characterized by a cozy atmosphere perfect for embracing this festive time of year. For more insights into the seasonal variations and overall climate of this beautiful region, be sure to check out Sinaia Climate.