December Weather in Sofia, Bulgaria

Last updated: August 21, 2025

In December, Sofia, Bulgaria, experiences a chilly climate with temperatures ranging from a maximum of 13°C (55°F) to a bitter minimum of -14°C (7°F). The average temperature hovers around 1°C (34°F), making it essential for residents and visitors alike to bundle up for the cold. This month sees about 68 mm (2.7 in) of precipitation spread across 12 days, contributing to a higher humidity level of 89%. As the holiday season approaches, the mix of cool temperatures and occasional rain creates a uniquely atmospheric backdrop for winter activities in the vibrant capital.

December Temperature in Sofia

In December, Sofia, Bulgaria experiences a significant chill as winter settles in, with temperatures dipping to a minimum of -14°C (7°F) and reaching an average of 1°C (34°F). Daytime highs can climb to around 13°C (55°F), offering brief respite from the cold. This month marks a noticeable shift from the milder autumn temperatures of November, where averages hover around 6°C (42°F). As the year comes to a close, snow may blanket the city, adding a picturesque charm to Sofia's historic streets while residents and visitors alike bundle up to embrace the seasonal beauty.

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

The chart illustrates December temperature patterns in Sofia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sofia, 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).
JanFebMarAprMayJunJulAugSepOctNovDec283640485764686961514234
Data source: Temperature data for Sofia generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Sofia

In December, Sofia experiences a notable increase in precipitation, with a total of 68 mm (2.7 in) recorded over 12 days. This marks a significant uptick from the drier months preceding it, such as September and October, which saw just 25 mm (1.0 in) and 44 mm (1.7 in), respectively. The shift towards wetter weather signals the arrival of winter, when snowy days start to replace the crisp autumn air. Interestingly, December's rainfall is higher than that of both January and February, indicating a unique trend where early winter can deliver more moisture than the ensuing deep winter months. Overall, this pattern highlights Sofia's transition into a season characterized by increased precipitation, preparing the city for a frosty yet picturesque landscape.

December Precipitation Trends in Sofia

The chart displays monthly precipitation patterns in Sofia, 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 Sofia, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec554774506587683325443768
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sofia

As the year draws to a close, December in Sofia, Bulgaria, experiences a notable peak in humidity, reaching 89%—tying with January for the highest level throughout the year. This frosty month marks a significant shift from the drier summer months, where August registers a remarkably low 50% humidity. As autumn transitions into winter, humidity levels rise steadily, culminating in December's damp atmosphere, which reflects the natural cycle of the seasons. With November also showcasing high humidity at 87%, it’s clear that Sofia enjoys a moist close to the year, setting the stage for the cold winter months ahead.

December Average Humidity in Sofia

This chart illustrates the average monthly humidity levels in Sofia, 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 Sofia is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%83%71%73%67%68%50%59%79%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sofia

In December, Sofia experiences a notable dip in UV exposure, with the UV Index dropping to 2, classified as a low exposure category. This significantly decreases the risk of sunburn, extending the safe sun exposure time to an impressive 45 minutes. This trend of lower UV levels follows a pattern established in the preceding months, where the summer months peaked at a UV Index of 10 in June and July, indicating very high exposure. As the year winds down, the colder months bring a welcome relief from high UV levels, making December an ideal time for outdoor activities without the usual sun protection concerns. For those looking to understand the UV index fluctuations throughout the year, detailed insights can be found at Sofia UV Index.

Maximum UV Index Levels in Sofia for December

The chart shows the monthly maximum UV Index (UVI) for Sofia 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 Sofia typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24779101097632
Data source: Sofia 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 Sofia

December in Sofia, Bulgaria, offers a gentle conclusion to the year with 211 hours of sunshine, a dip from the vibrant light of the summer months but a welcome brightness during the winter chill. As temperatures drop, the city experiences significantly fewer hours of sun compared to the peak summer days, where July boasts a dazzling 423 hours. The trend reveals a gradual increase in daylight from January's modest 173 hours to the spring's 285 hours in March, emphasizing the awakening of nature after winter. While December brings less sunshine, it still carries the charm of the festive season, allowing residents and visitors alike to enjoy the beauty of Sofia under the soft radiance of winter sun.

Monthly Sunshine Duration in Sofia: December Highlighted

The December sunshine duration represents the total number of hours Sofia 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.
JanFebMarAprMayJunJulAugSepOctNovDec173h238h285h342h393h393h423h401h342h287h234h211h
Data source: Sofia December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sofia During December

In Sofia, Bulgaria, the likelihood of sunny weather in December hovers around 31%, reflecting a trend seen throughout the colder months. After a slight drop in November, where the chances of sunshine lessen to the same percentage, December continues this pattern. Notably, the sun's presence begins to wane significantly following the summer peak, with July and August boasting a remarkable 73% and 74% likelihood of sunny days, respectively. As fall progresses, this probability steadily declines, culminating at the year's end when the sun is less likely to make an appearance. This seasonal shift indicates that while December may offer some glimmers of sunshine, residents should prepare for a mix of overcast skies and colder weather.

Percentage of Sunny Days in December in Sofia

The chart illustrates the percentage of sunny days in Sofia 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 Sofia experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%50%48%41%45%46%73%74%54%44%31%31%
Data source: Sofia December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sofia in December

As December unfolds in Sofia, Bulgaria, residents experience a return to the shorter days of winter, with daylight lasting only 9 hours—the same as in January and November. This month marks the culmination of the declining daylight that began in the summer months, where June boasted 15 hours of gleaming sun. The gradual reduction in daylight hours, from the peak of summer to the winter depths, showcases a rhythmic cycle of nature, drawing a stark contrast to the 14 hours enjoyed in May and the 12 hours that follow in September. As the days remain shorter, the twinkling lights and festive spirit illuminate Sofia, creating a cozy atmosphere during these winter evenings.

Average Daylight Hours in Sofia for December

The chart illustrates the variation in daylight duration in Sofia throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 25m10h 32m11h 57m13h 24m14h 38m15h 15m14h 56m13h 50m12h 26m11h9h 43m9h 4m
Data source: Sofia daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Sofia

As December settles over Sofia, Bulgaria, the average wind speed hovers around 2.1 m/s (5 mph), maintaining a gentle breeze that has characterized much of the autumn and early winter months. This figure is consistent with the wind patterns observed from previous months, where speeds typically range from 1.7 to 2.3 m/s. Notably, December's winds are slightly slower than the heights seen in the spring and fall but present a refreshing touch to the crisp winter air. While January through March display a steadier pace at 2.3 m/s, December's winds serve as a reminder of the mild climatic transitions in late autumn, creating a serene backdrop for the festive season in the city. Overall, Sofia's winter winds maintain a soothing rhythm, inviting residents and visitors alike to embrace the beauty of the season.

Average December Wind Speed in Sofia

The chart displays monthly wind speed patterns in Sofia, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.12.32.12.31.72.01.82.02.12.02.1 m/s
Data source: Sofia December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Sofia Compares to Other Months

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

In December, temperatures in Sofia range from a minimum of -14°C (7°F) to a maximum of 13°C (55°F), with an average of 1°C (34°F). The month experiences around 68 mm (2.7 in) of precipitation over 12 days, coupled with a consistent humidity level of 89%. In contrast, January sees a drop in the minimum temperature to -25°C (-14°F) and a slightly lower average of -2°C (29°F), while the maximum only reaches 12°C (54°F). Despite having less precipitation at 55 mm (2.2 in) over 9 days, the humidity remains steady at 89%. For more detailed information, visit Sofia weather in January.

In December, temperatures in Sofia range from a chilly -14°C (7°F) at their lowest to a mild 13°C (55°F) at their highest, with an average temperature of around 1°C (34°F). The month sees about 68 mm (2.7 in) of precipitation over approximately 12 days, coupled with high humidity at 89%.

In contrast, February tends to be even colder, experiencing minimum temperatures of -22°C (-8°F) and maximums around 18°C (64°F), while the average temperature slightly rises to 2°C (36°F). Precipitation decreases to about 47 mm (1.8 in) over 8 days, and humidity remains relatively high at 85%. For more specific details about the weather in Sofia during February, you can check Sofia weather in February.

In December, temperatures typically range from a minimum of -14°C (7°F) to a maximum of 13°C (55°F), with an average of around 1°C (34°F). The month experiences about 68 mm (2.7 in) of precipitation over approximately 12 days, accompanied by relatively high humidity at 89%. In contrast, March sees slightly lower minimum temperatures at -20°C (-3°F) but higher maximums reaching up to 22°C (71°F), leading to an average of 5°C (40°F). Total precipitation in March increases modestly to 74 mm (2.9 in) over 11 days, with humidity decreasing slightly to 83%. For a more detailed look at the weather during this time, you can check Sofia weather in March.

When comparing the weather in December and April, significant differences emerge. December typically presents a colder climate, with temperatures ranging from a minimum of -14°C (7°F) to a maximum of 13°C (55°F), while April enjoys milder temperatures, with a minimum of -6°C (21°F) and a maximum of 25°C (78°F). Precipitation is slightly higher in December at 68 mm (2.7 in) over 12 days compared to April’s 50 mm (2.0 in) across 10 days. Additionally, December maintains a higher humidity level at 89%, whereas April's humidity drops to 71%. For further insights into April's weather patterns, you can check out Sofia weather in April.

December and May showcase a stark contrast in weather. In December, temperatures can plummet to as low as -14°C (7°F), with an average temperature hovering around 1°C (34°F) and a maximum reaching 13°C (55°F). The month is characterized by high humidity levels at 89% and precipitation of about 68 mm (2.7 in) over 12 days. In contrast, May brings a much milder climate, with minimum temperatures starting at 1°C (34°F) and averaging 14°C (57°F), peaking at 29°C (84°F). Although May has a similar precipitation amount of 65 mm (2.6 in), it experiences slightly more rainy days at 14, alongside a lower humidity level of 73%. For a detailed look at what to expect, you can check out Sofia weather in May.

December and June present markedly different weather patterns. In December, temperatures can dip as low as -14°C (7°F), with an average of around 1°C (34°F) and a maximum of 13°C (55°F). The month experiences significant humidity at 89% and sees around 68 mm (2.7 in) of precipitation over 12 days. In contrast, June offers a much milder climate, with temperatures ranging from a minimum of 4°C (39°F) to an average of 18°C (64°F) and highs reaching 32°C (91°F). This month also has a slightly higher precipitation total of 87 mm (3.4 in) over 16 days, but the humidity is notably lower at 67%. For a detailed look at what to expect, check out Sofia weather in June.

December and July in Sofia present a stark contrast in weather conditions. December features chilly temperatures, with a minimum of -14°C (7°F) and an average of around 1°C (34°F), while July enjoys much milder weather, boasting a comfortable average temperature of 20°C (68°F) and highs reaching up to 35°C (95°F). Both months experience similar levels of precipitation, with December receiving 68 mm over 12 days, and July slightly less at 67 mm across 11 days. Additionally, December's humidity at 89% compares to a significantly lower 68% in July, adding to the feeling of warmth during the summer month. For a closer look at July's weather specifics, you can check Sofia weather in July.

December and August present stark contrasts in weather. December experiences frigid temperatures, with a minimum of -14°C (7°F) and an average around 1°C (34°F), while August boasts a much milder range, with a minimum of 7°C (44°F) and an average temperature of 20°C (69°F). Precipitation in December is higher, totaling 68 mm (2.7 in) over 12 days, compared to just 33 mm (1.3 in) across 7 days in August. Humidity levels also differ significantly; December holds a high humidity of 89%, while August sees a drier atmosphere with 50% humidity. For more specific information on August conditions, visit Sofia weather in August.

December weather in Sofia is characterized by significantly colder temperatures, with a minimum of -14°C (7°F) and an average of 1°C (34°F), contrasting sharply with September's more moderate climate where temperatures range from a minimum of -2°C (28°F) to an average of 16°C (61°F) and can reach up to 32°C (90°F). Additionally, December experiences a higher frequency of precipitation over 12 days and a humidity level of 89%, while September sees much less rainfall, totaling 25 mm (1.0 in) over just 4 days and lower humidity at 59%. This stark contrast highlights the transition from autumn warmth to the chill of winter. For more detailed information, you can explore Sofia weather in September.

When comparing the weather in December and October, December tends to be significantly colder with average temperatures hovering around 1°C (34°F) compared to October's mild average of 10°C (51°F). While December experiences minimum temperatures plummeting to -14°C (7°F), October has a milder minimum of -3°C (27°F). Precipitation is also more frequent in December, occurring over 12 days and totaling 68 mm (2.7 in), while October's rain is less, falling on just 6 days with a total of 44 mm (1.7 in). Additionally, December's humidity is higher at 89%, compared to 79% in October. For a more detailed look at October's weather, you can check Sofia weather in October.

In comparing the weather of December and November, we notice a significant shift in temperatures and precipitation patterns. December experiences a colder average temperature of 1°C (34°F), with a maximum reaching only 13°C (55°F), while November enjoys milder temperatures, averaging 6°C (42°F) and peaking at 22°C (73°F). Additionally, December is wetter, with 68 mm (2.7 in) of precipitation over 12 days, compared to November's 37 mm (1.5 in) across just 6 days. Both months maintain similar humidity levels, with December at 89% and November slightly lower at 87%. For a more detailed look into November's weather, visit Sofia weather in November.

Compare Sofia's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Sofia

As December sets in, Sofia transforms into a winter wonderland, with significantly colder temperatures compared to the milder months preceding it. The crisp air brings an average chill that dips well below freezing at night, inviting residents and visitors alike to embrace the cozy comforts of the season. Precipitation is more frequent this month, contributing to the city’s charm with occasional snowflakes blanketing the landscape. The high humidity adds to the chilly ambiance, making this month distinctively frosty and perfect for enjoying warm drinks and festive activities. For a deeper dive into Sofia’s weather patterns throughout the year, explore Sofia Climate.