Last updated: March 24, 2025
In December, San Siro, Italy experiences a distinctive winter climate characterized by a maximum temperature of 13°C (55°F) and a chilly average of 2°C (37°F), dipping to a minimum of -9°C (17°F). This month witnesses 108 mm (4.2 in) of precipitation spread over 9 days, contributing to a damp atmosphere with humidity levels reaching 85%. Visitors should be prepared for the brisk air and occasional rain, making it an ideal time to explore the city's winter charm while bundled up and enjoying festive activities.
In December, San Siro, Italy experiences a noticeable chill as winter sets in, with temperatures reflecting a significant dip from the milder months. The average temperature hovers around 2°C (37°F), while nighttime lows can plunge to a brisk -9°C (17°F). Although days may reach a maximum of 13°C (55°F), the overall trend reveals a steady cooling compared to November, where temperatures only slightly flirted with freezing. This month marks a clear transition into the colder season, inviting visitors to bundle up and enjoy the festive atmosphere that the winter months bring. With its moderate daytime highs and biting nighttime lows, December in San Siro serves as a captivating backdrop for holiday activities, making it a perfect time to experience the warmth of local hospitality amid the chill.
December in San Siro, Italy, sees a moderate precipitation level, with 108 mm (4.2 in) of rainfall spread across 9 days. This represents a significant dip from the wetter months of late spring and summer, reflecting a gradual shift as the region transitions into winter. Notably, the precipitation in December, while lower than the peak months of June and October, shows a consistent pattern of reduced rainfall compared to the height of the wet season, where totals exceeded 200 mm. The decline from autumn to winter illustrates a typical seasonal trend, allowing for a mix of crisp, clear days alongside sporadic rainfall, often enhancing the serene charm of the Italian landscape during this time of year.
In San Siro, Italy, December sees a humidity level of 85%, marking a slight decline from the 88% registered in both January and November. This time of year exhibits a notable trend, as humidity levels generally decrease from the peak of summer, where they reach a low of 64% in August. Following this dip, humidity gradually climbs again in the fall, peaking towards the end of the year. This winter rise is indicative of the region's shift from crisp autumn air to the damp chill of winter, creating a cozy yet humid atmosphere as the year comes to a close.
In December, the UV Index in San Siro, Italy, takes a dip to 2, placing it firmly in the low exposure category. With a comfortable burn time of 45 minutes, this month offers a reprieve from the intense sun experienced during the summer months, when UV levels soared to 9. As the year winds down, December's UV Index reflects a clear seasonal trend: starting from a low of 2 in January, the levels gradually rise through the spring, peaking in the summer before retreating again in the fall and winter. This cyclical pattern highlights the importance of adapting sun protection measures throughout the year. For more detailed information on UV exposure, check out the San Siro UV Index.
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In San Siro, December brings a subtle shift in sunshine, with 209 hours of daylight lighting the winter landscape. This marks a slight increase from November's 207 hours, hinting at the gradual return of brighter days as we inch towards the new year. While December's hours pale in comparison to the sun-drenched heights of summer—where July boasts a vigorous 422 hours—it still offers a gentle reminder of the sun's resilience against the winter chill. As the months progress from the darkness of January's 187 hours to the vibrant 377 hours of May, December stands as a transitional bridge, celebrating the beauty of the season while beckoning the promise of longer, sunnier days ahead.
As December rolls into San Siro, Italy, the chances of enjoying sunny weather stand at 49%, offering a promising shift as the year draws to a close. This figure is notably higher than the preceding months of November (41%) and October (42%), indicating a slight increase in sunny potential as winter approaches. While the winter months typically see less sunshine compared to spring, there is a gradual upward trend evident as the year progresses, with December marking a peak in among the colder months. With nearly half the month potentially filled with sun, December provides a delightful opportunity for locals and visitors alike to soak in the rays before the depths of winter settle in.
As December ushers in winter in San Siro, Italy, the days grow shorter, with daylight lasting just 8 hours. This marks a noticeable dip after the longer, sun-kissed days of summer, where June and July enjoy a full 15 hours of light. Following the vibrant months of April and May, which bask in 13 and 14 hours respectively, the transition to December brings the daylight duration down to its annual low. Interestingly, as the year progresses, daylight starts at a modest 9 hours in January, only to gradually increase until it peaks in mid-summer. However, by December, the cycle shifts once more, leading to cozy, candle-lit evenings that signal the approach of winter.
As December sweeps into San Siro, a noticeable uptick in wind speeds brings a refreshing change to the winter air. With an average wind speed of 1.7 m/s (4 mph), December marks a slight increase from the previous months, which generally hovered between 1.1 and 1.6 m/s. This seasonal shift not only invites a brisk chill, but it also enhances the vibrant atmosphere of the bustling city. Throughout the year, wind speeds tend to gently oscillate, with the colder months often showing subtle increases, culminating in December’s lively breezes that dance through the streets, stirring anticipation for the festive celebrations ahead.
The weather in San Siro changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Siro and find detailed weather information for every month.
December and January exhibit similar cold weather patterns, but there are notable differences in temperature and precipitation. December typically experiences a slightly warmer average temperature of 2°C (37°F), with maximums reaching up to 13°C (55°F), while January averages drop to 1°C (35°F), peaking at 12°C (53°F). In terms of precipitation, December is wetter, with 108 mm (4.2 in) of rain over 9 days, compared to January's 48 mm (1.9 in) falling over just 7 days. Humidity levels are slightly higher in January at 88%, compared to December's 85%, creating a crisp, cold atmosphere. For more on January weather specifics, check out San Siro weather in January.
In December, temperatures range from a chilly minimum of -9°C (17°F) to a milder maximum of 13°C (55°F), with an average temperature of 2°C (37°F). The month sees significant precipitation of 108 mm (4.2 in) over about 9 days, contributing to a high humidity level of 85%. In contrast, February experiences slightly colder minimum temperatures of -12°C (10°F) but boasts a warmer maximum of 18°C (65°F) and an average of 3°C (39°F). Precipitation decreases to 52 mm (2.0 in) over 8 days, with humidity dropping to 81%. The shift from December to February indicates a slight warming trend and reduced precipitation, making February a more favorable month for outdoor activities. For more detailed weather insights, check San Siro weather in February.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -9°C (17°F) to a maximum of 13°C (55°F) and an average of 2°C (37°F). The month experiences significant precipitation, totaling 108 mm (4.2 in) over approximately 9 days, and high humidity at 85%, giving it a characteristic winter feel. In contrast, March sees a more moderate climate with temperatures ranging from -8°C (17°F) to a warmer maximum of 20°C (68°F) and an average of 6°C (43°F). Total precipitation is slightly lower at 105 mm (4.1 in), spread across 11 days, and the humidity decreases to 76%, indicating a shift towards spring. For more detailed information, you can check out San Siro weather in March.
December and April showcase a stark contrast in weather patterns. In December, temperatures range from a chilly -9°C (17°F) at night to a mild 13°C (55°F) during the day, with an average of just 2°C (37°F). The month is marked by high humidity at 85% and precipitation amounting to 108 mm (4.2 in) over about 9 rainy days. In contrast, April experiences a noticeable warming trend, with temperatures ranging from a low of -2°C (28°F) to a high of 23°C (74°F) and an average temperature of 10°C (50°F). Although April sees more precipitation, totaling 162 mm (6.4 in) over 13 days, the humidity is slightly lower at 77%. For a closer look at what to expect during this time, visit San Siro weather in April.
The weather in December presents a stark contrast to that of May. In December, temperatures can drop as low as -9°C (17°F), with an average of just 2°C (37°F), while May sees much milder conditions, starting at a minimum of 1°C (33°F) and peaking at an average of 14°C (57°F). Rainfall is more frequent in May, with 202 mm (8.0 in) over 19 days compared to December's 108 mm (4.2 in) over only 9 days. Additionally, December's high humidity at 85% gives it a cold, damp feel, whereas May's humidity of 74% adds to the warmth and vibrancy of the spring season. For a closer look at May's climate specifics, check out San Siro weather in May.
December and June present contrasting weather conditions. In December, temperatures can drop as low as -9°C (17°F) and average around 2°C (37°F), with maximums reaching 13°C (55°F). This month experiences significant precipitation at 108 mm (4.2 in) over about 9 days, coupled with high humidity levels at 85%. In stark contrast, June boasts much warmer temperatures, with lows of 8°C (46°F) and average highs around 18°C (65°F), peaking at a sweltering 33°C (92°F). Additionally, June sees increased rainfall at 219 mm (8.6 in) over 17 days but maintains lower humidity at 71%. For more detailed information, you can check San Siro weather in June.
The weather in December is markedly colder than in July, with temperatures ranging from a minimum of -9°C (17°F) to a maximum of 13°C (55°F) and an average of 2°C (37°F). In contrast, July boasts much warmer conditions, with temperatures starting at 10°C (50°F) and reaching up to 30°C (86°F), averaging around 20°C (68°F). December experiences about 108 mm (4.2 in) of precipitation over nine days, while July sees more rain, totaling 187 mm (7.4 in) over 17 days, albeit with lower humidity at 67% compared to December's high of 85%. For more details about the weather in July, check out San Siro weather in July.
December and August present a stark contrast in weather. In December, temperatures dip significantly, with lows around -9°C (17°F) and an average of 2°C (37°F), making for a chilly winter month. The precipitation also plays a role, totaling 108 mm (4.2 in) over about 9 days, coupled with high humidity at 85%. In contrast, August offers a much warmer climate, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 30°C (86°F) and an average of 20°C (68°F). Despite being a summer month, August is wetter overall, receiving 222 mm (8.7 in) of rain across 17 days, but the humidity is notably lower at 64%. For more details on August weather, you can check out San Siro weather in August.
In comparing the weather of December and September, it's striking how different the two months can be. December features much colder temperatures with an average of 2°C (37°F), ranging from a frigid minimum of -9°C (17°F) to a maximum of 13°C (55°F). Additionally, this month sees significant humidity at 85% and experiences approximately 108 mm (4.2 in) of precipitation over 9 days. In contrast, September offers a more temperate climate, with an average temperature of 16°C (61°F) and a comfortable high of 25°C (78°F), along with a minimum of 4°C (39°F). However, September is also wetter, accumulating around 161 mm (6.3 in) of rain over 14 days, but with a lower humidity of 74%. For a more detailed look at the weather in September, you can visit San Siro weather in September.
When comparing December and October weather, we see notable differences in temperature and precipitation. December experiences much colder temperatures, with averages around 2°C (37°F) and lows plummeting to -9°C (17°F), while October enjoys milder conditions, averaging 11°C (53°F) and reaching highs of 23°C (73°F). Precipitation is also significantly different; December averages 108 mm (4.2 in) over 9 days, while October sees a higher total of 223 mm (8.8 in) over 11 days. Despite the slight decrease in humidity from December (85%) to October (87%), both months are quite damp, but October's warmth and increased rainfall create a contrasting atmosphere to the chillier, drier December. For more detailed insights on October weather, visit San Siro weather in October.
In comparing the weather of December and November, it is evident that December experiences colder temperatures, with a minimum of -9°C (17°F) and an average of 2°C (37°F), whereas November has a milder range with a minimum of -3°C (27°F) and an average of 7°C (44°F). Additionally, November tends to be wetter than December, receiving 177 mm (7.0 in) of precipitation over 13 days compared to December's 108 mm (4.2 in) across 9 days. Humidity levels are slightly higher in November at 88%, in contrast to December's 85%. For more specific details on the weather in November, you can refer to San Siro weather in November.
As December arrives in San Siro, the weather takes a chilly turn compared to the mild months before it. The maximum temperatures dip significantly, often hovering around a brisk 13°C, with average temperatures falling to a cold 2°C. The nighttime brings even colder air, with lows reaching -9°C on occasion. This month also witnesses increased precipitation, adding a damp chill to the atmosphere, as wet days rise to about nine. The humidity remains high at 85%, making the air feel even colder. For a deeper understanding of the seasonal shifts, including December's unique characteristics, be sure to explore San Siro Climate.