Last updated: August 21, 2025
December in Piraeus, Greece offers a cool yet mild climate, characterized by an average temperature of 11°C (53°F), with daily highs reaching up to 21°C (70°F) and dipping to a chilly 1°C (34°F) at night. The month witnesses 66 mm (2.6 in) of rainfall spread over approximately 9 days, contributing to a humidity level of 76% that adds a crispness to the air. This blend of mild temperatures and occasional showers creates an inviting atmosphere for locals and visitors alike, making it a charming time to explore this vibrant port city.
As December approaches in Piraeus, Greece, the temperatures begin to cool down gently, marking a transition into winter. The month typically sees a minimum temperature of 1°C (34°F), creeping just above freezing, while an average temperature of 11°C (53°F) offers a mild escape for locals and visitors alike. The maximum usually reaches a comfortable 21°C (70°F), reminiscent of early autumn days. Compared to the previous months, December brings a noticeable drop from the warmer temperatures of November, which showcased balmy highs of 25°C (78°F). Still, the climate remains inviting, making it a cozy time to explore the historic port city's charm against a backdrop of chillier, yet fragrant Mediterranean breezes.
In December, Piraeus experiences a notable spike in precipitation, accumulating around 66 mm (2.6 in) of rain over an average of 9 days. This increase marks a contrast to the drier summer months, which see minimal rainfall, with July and August featuring as particularly arid months. As the year wraps up, December's precipitation is the highest recorded since January, indicating a shift in weather patterns as cooler temperatures set in. This trend demonstrates the transition from the drier, sun-soaked conditions of summer to a wetter, more dynamic winter climate, bringing the city’s annual weather cycle full circle.
In December, Piraeus, Greece, experiences a humidity level of 76%, maintaining a trend of slightly elevated moisture that unfolds throughout the winter months. Following a gradual decrease from the summer peak of 68% in July to 63% in August, humidity begins to rise again, with November registering 75%. This consistent increase into December signals a return to the higher moisture levels typical of the preceding months. Overall, the climate exhibits a rhythmic pattern, with winter months generally showcasing higher humidity, creating a refreshing yet crisp atmosphere as the year concludes.
In Piraeus, Greece, the UV Index shows a noticeable seasonal trend, with the highest exposure levels occurring in the warmer months. From January to March, the index begins at a moderate level of 3 but steadily climbs to 6 by March, indicating the approach of stronger sun rays. The spring months of April and May see a surge, with UV levels peaking at a very high 10, demanding caution for sunbathers. A subsequent plateau at 10 continues through the summer months of June to August, emphasizing the necessity for protective measures. As autumn sets in, recorded indices drop to a high of 8 in September before tapering off. By December, the UV Index returns to a moderate 3, suggesting a safer period for exposure. For detailed insights and forecasts, visit the Piraeus UV Index page.
UV Risk Categories
December in Piraeus, Greece, offers a gentle embrace of sunshine, with around 250 hours of delightful daylight. While this marks the lowest monthly total for the year, it follows a striking trend of increasing sunlight from January’s mere 200 hours to the summer peak of 423 hours in July. As autumn settles in, the hours gradually decline, with November still enjoying 261 hours before December’s descent. The steady rise and fall throughout the year highlight Piraeus as a sunlit haven, where even the cooler months offer a warm respite compared to the bleak winters in northern regions. Embrace the mild December sun as it casts a golden glow on the city's rich history and vibrant culture, making it a charming time to explore.
When considering the likelihood of sunny weather in December in Piraeus, Greece, you'll find that it stands at 51%—a moderate probability that hints at both risk and opportunity for enjoying the outdoors. As we transition from the sun-drenched summer months, where chances soar to a remarkable 94% in July and 95% in August, the likelihood begins to decline during the fall and into early winter. November dips to 40%, but December shows a slight rebound, suggesting that while you'll need to keep an eye on the weather, there's still a reasonable chance to bask in some sunlight as the year comes to a close. This trend underscores the Mediterranean climate's unpredictable charm, encouraging outdoor enthusiasts to seize those sunny breaks even in the midst of winter.
In Piraeus, Greece, the rhythm of daylight ebbs and flows throughout the year, peaking in the vibrant months of spring and summer. As December approaches, the city experiences a return to shorter days, with daylight lasting approximately 9 hours. This is consistent with the year’s beginning when January also offers just 9 hours of daylight. Following this winter trend, daylight gradually increases through February and March, reaching a robust 14 hours by May and maintaining that length through June and July. As summer wanes into autumn, daylight recedes, cascading back down to 10 hours in November before settling at its December low. This cyclical dance of light not only marks the changing seasons but also enhances the allure of Piraeus, where the sun casts its glow longer during the warmer months, inviting both locals and visitors to enjoy its picturesque landscapes.
In December, Piraeus experiences a notable uptick in wind activity, with an average speed of 3.5 m/s (8 mph), making it one of the breeziest months of the year. This increase marks a pleasant departure from the calmer summer months, where winds often dip to around 1.8 m/s (4 mph) in June. As the year draws to a close, the wind picks up, revealing a trend of generally moderate speeds during most months, particularly in late autumn with consistent speeds around 3.0 m/s (7 mph). The December winds not only invigorate the atmosphere but also herald the arrival of winter, creating an ideal backdrop for those exploring the vibrant maritime life of this historic port city.
Weather in Piraeus varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Piraeus, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January in Piraeus showcase notable differences in temperatures and precipitation patterns. In December, temperatures range from a minimum of 1°C (34°F) to a maximum of 21°C (70°F), with an average of 11°C (53°F), and the month experiences around 66 mm (2.6 in) of precipitation over 9 days. In contrast, January brings cooler conditions, with temperatures dipping to a minimum of -4°C (25°F) and an average of 9°C (48°F), while the maximum reaches 22°C (72°F). Precipitation decreases slightly to 57 mm (2.2 in) across 7 days, yet humidity remains constant at 76% throughout both months. For more detailed weather insights, check out Piraeus weather in January.
December and February both feature mild temperatures, though December is slightly warmer overall. In December, temperatures range from a minimum of 1°C (34°F) to a maximum of 21°C (70°F), while February sees temperatures from 0°C (32°F) to 20°C (68°F). Precipitation is more prevalent in December, with 66 mm (2.6 in) falling over 9 days, compared to February's 48 mm (1.9 in) over 8 days. Humidity levels remain fairly constant, with December at 76% and February slightly lower at 75%. For more detailed information, you can check Piraeus weather in February.
In December, the weather is characterized by a relatively mild temperature range, with minimums around 1°C (34°F) and maximums reaching 21°C (70°F). The month sees an average temperature of 11°C (53°F) and experiences about 66 mm (2.6 in) of precipitation over approximately 9 days, along with a humidity level of 76%. In contrast, March showcases slightly higher average temperatures, with minimums at 0°C (32°F) and maximums peaking at 23°C (74°F). The average for March is 12°C (54°F), and it has lower precipitation, at 39 mm (1.5 in) over just 5 days, resulting in a slightly lower humidity of 74%. For more details on March weather, visit Piraeus weather in March.
December and April present contrasting weather patterns. In December, temperatures range from a chilly 1°C (34°F) to a mild 21°C (70°F), with an average of 11°C (53°F). This month experiences a higher amount of precipitation at 66 mm (2.6 in) over approximately 9 days, alongside a humidity level of 76%. In contrast, April welcomes warmer temperatures, with lower minimums of 4°C (40°F) and maximum highs reaching 29°C (85°F), averaging at 15°C (60°F). The precipitation decreases to 42 mm (1.6 in) spread over just 5 days, while humidity slightly drops to 75%. For more details, you can check out Piraeus weather in April.
December weather typically ranges from a chilly minimum of 1°C (34°F) to a mild maximum of 21°C (70°F), with an average temperature of around 11°C (53°F). The month sees approximately 66 mm (2.6 in) of precipitation over about 9 days, and humidity levels hover around 76%. In contrast, May brings much warmer conditions, with temperatures starting at a comfortable minimum of 10°C (51°F) and soaring to a maximum of 36°C (97°F), averaging at about 21°C (70°F). Precipitation drops significantly to just 23 mm (0.9 in) over only 4 days, while humidity slightly increases to 77%. For a more detailed look at the weather in May, visit Piraeus weather in May.
In December, the weather is considerably cooler, with temperatures ranging from a chilly 1°C (34°F) at night to a mild 21°C (70°F) during the day, and an average of 11°C (53°F). The month sees approximately 66 mm (2.6 in) of precipitation over 9 days, contributing to a higher humidity level of 76%. In contrast, June boasts warmer temperatures, with a minimum of 13°C (56°F), an average of 25°C (77°F), and highs reaching up to 38°C (101°F). Rainfall is significantly lower in June, at just 33 mm (1.3 in) across 5 days, and the humidity is slightly reduced at 71%. For more information on the weather during this vibrant month, check out Piraeus weather in June.
December weather features cooler temperatures, with a minimum of 1°C (34°F) and an average of 11°C (53°F), peaking at a maximum of 21°C (70°F). This month also sees a fair amount of precipitation, totaling 66 mm (2.6 inches) over about 9 days, accompanied by a relatively high humidity level of 76%. In stark contrast, July boasts much warmer conditions with temperatures ranging from a minimum of 19°C (67°F) to an average of 28°C (83°F) and soaring highs of up to 42°C (108°F). Precipitation is minimal in July, with just 9 mm (0.4 inches) typically falling over only 2 days, and humidity is slightly lower at 68%. For more details on the warm and dry conditions typical of this month, check out Piraeus weather in July.
When comparing the weather in December and August, it's evident that the two months present vastly different climate conditions. December features a cooler range of temperatures, with a minimum of 1°C (34°F) and an average of 11°C (53°F), while August boasts much warmer temperatures, with a minimum of 19°C (66°F) and an average high of 28°C (83°F). Precipitation also varies significantly; December sees an average of 66 mm (2.6 in) over about 9 days, compared to the almost dry conditions of August, which experiences only 4 mm (0.2 in) with no rainy days at all. Additionally, humidity is higher in December at 76%, while August enjoys a lower humidity level of 63%. For a more detailed look at the conditions during August, you can visit Piraeus weather in August.
When comparing December and September weather, significant differences emerge in both temperature and precipitation patterns. December tends to be much cooler, with average temperatures ranging from a minimum of 1°C (34°F) to a maximum of 21°C (70°F), while September boasts warmer conditions, with temperatures fluctuating between 13°C (55°F) and 37°C (98°F). In terms of precipitation, December experiences more rainfall, with 66 mm (2.6 in) spread over 9 days, compared to September's minimal 17 mm (0.7 in) over just 2 days. Additionally, December's higher humidity at 76% contrasts with September's lower humidity level of 65%. For a more detailed overview of September in Piraeus, you can check out Piraeus weather in September.
December weather is generally cooler and wetter than October. While December temperatures range from a minimum of 1°C (34°F) to a maximum of 21°C (70°F), October boasts a milder average of 19°C (66°F), with highs reaching as much as 31°C (89°F). Additionally, precipitation increases significantly in December, with 66 mm (2.6 in) expected over about 9 days, whereas October sees just 30 mm (1.2 in) over only 4 days. Humidity levels are slightly higher in December at 76%, compared to 72% in October. For more detailed information on October weather conditions, you can check Piraeus weather in October.
In December, the weather sees a notable drop in temperature compared to November, with minimums at 1°C (34°F) versus 4°C (39°F) and average highs of 21°C (70°F) compared to 25°C (78°F) in November. Additionally, December experiences more rainfall at 66 mm (2.6 in) over 9 days, while November has less precipitation at 48 mm (1.9 in) across 7 days. Both months have similar humidity levels, hovering around 75-76%. For a detailed look at the weather in November, you can visit Piraeus weather in November.
As December arrives in Piraeus, the weather takes on a cooler and more humid character compared to previous months. With average temperatures hovering around 11°C (53°F) and a maximum of 21°C (70°F), the city bids farewell to the warmer days of autumn. Rainfall becomes more frequent with around 66 mm (2.6 in) spread over 9 days, contributing to a notably higher humidity level of 76%. This shift heralds the onset of winter, offering a refreshing contrast to the sun-drenched months before. For a closer look at what to expect during this transitional month, check out Piraeus Climate.