Last updated: August 21, 2025
December in Si'an, China presents a fascinating blend of cool temperatures and atmospheric charm. With average highs reaching 23°C (73°F) and lows dipping to a brisk -5°C (22°F), residents and visitors can expect a diverse range of conditions throughout the month. The overall average temperature settles around 7°C (44°F), making it essential to layer up. While the city experiences 52 mm (2.0 in) of precipitation over approximately 8 days, the distinct 77% humidity adds a unique texture to the winter air. Embrace the crisp weather and occasional drizzle as Si'an dons its winter cloak, perfect for exploring the rich history and culture of this captivating region.
In Si'an, China, December marks a transition into the cooler months, with temperatures reflecting a gradual drop as winter settles in. The month presents a minimum of -5°C (22°F), giving way to an average of 7°C (44°F) and a peak of 23°C (73°F). This trend shows a continuation from the preceding months, where temperatures have been steadily declining since the peak heat of summer. December's chill contrasts with the mildness of November, yet it still offers a considerable range for daytime activities, inviting both locals and tourists to enjoy the crisp winter air while experiencing the beauty of the season. As the year closes, Si'an’s frosty evenings and fairly moderate afternoons create a unique atmosphere that combines the old-world charm of this historic city with the breath of winter.
In December, Si'an, China, experiences a notable shift in its precipitation patterns. With an average rainfall of 52 mm (2.0 in) over 8 days, the month marks a decline from the heavier downpours characteristic of the summer months, such as 299 mm (11.8 in) in July and 257 mm (10.1 in) in June. This trend reflects a gradual tapering off of precipitation as the region transitions into winter. Notably, December's rainfall is slightly higher than November’s 45 mm (1.8 in), suggesting a mild increase before the dry months ahead. Overall, the precipitation in December supports the onset of cooler temperatures while hinting at the lingering influence of the wetter monsoon season.
In Si'an, China, December ushers in a decline in humidity, with levels averaging around 77%. This marks a slight drop from the preceding months, which experienced higher humidity peaks, especially in the summer where figures reached a notable 90% in July. As the year transitions from the sweltering summer to a cooler winter, the humidity begins to stabilize, decreasing from November's 84%. This trend reflects a broader pattern where the humid summer months gradually yield to milder conditions, providing a refreshing respite before the cold of winter sets in. Overall, Si'an's December maintains a relatively comfortable humidity level, striking a balance between the harsher elements of the seasons.
In Si'an, China, December brings a noticeable dip in the UV Index, falling to 4 and categorizing exposure as moderate. This decline from the extreme levels typically seen in the summer months means residents and visitors can enjoy more time outdoors, with a burn time of up to 30 minutes before the sun's rays become harmful. It's a refreshing contrast to the 11 seen from May to August, where exposure is classified as extreme, requiring vigilant sun protection. As the year wraps up, this trend illustrates a gradual easing of UV intensity, making December an ideal time for outdoor activities without the intense caution needed in hotter months. For more detailed information, visit Si'an UV Index.
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In Si'an, December is a comforting embrace of sunshine, offering 213 hours of daylight that bridges the shorter winter days. Following a bustling summer peak in August with 300 hours, the sunshine gradually recedes as the year draws to a close. Despite this decline, December still enjoys more sunlight than the frosty months of January and February, which see only 152 and 201 hours, respectively. This transitional month hints at the lingering warmth of autumn, blending crispness with the promise of gradual growth as it paves the way for the brighter months ahead. The steady increase from the low of January showcases the region's resilience, ensuring that every drop of sunlight is cherished in the depths of winter.
As December rolls into Si'an, China, residents can look forward to an increased likelihood of sunny weather, with a notable 69% chance of sunshine. This marks a significant improvement compared to the preceding months; in fact, it's the highest probability of clear skies seen since the start of the year. The transition from November's 52% chance indicates a welcome shift towards brighter days, particularly as the country moves through the colder months. This trend hints at December’s potential to offer a cheerful backdrop for outdoor festivities and winter exploration, standing out as a delightful culmination of the year.
In Si'an, China, the rhythm of daylight dances through the seasons, peaking during the summer months. Starting with 10 hours of daylight in January, the hours gradually increase, reaching a vibrant 14 hours in June. As summer transitions to fall, there's a gentle decline, with daylight dwindling to 10 hours again by December. This cyclical pattern highlights the clear shift from longer, sun-soaked days in spring and summer to the serene but shorter days of winter, creating a comforting predictability in the yearly ebb and flow of natural light.
As December embraces Si'an, China, the average wind speed dips to 2.3 m/s (5 mph), marking a trend that encapsulates the city's serene transition into winter. This month's wind speeds reflect a gentle shift, following the pattern of a gradual decrease seen from the lively gusts of late spring and summer, peaking at 2.9 m/s (7 mph) in July. While the winds are calm in December, it's noteworthy how they maintain a close-knit consistency throughout the year, hovering around 2.6 m/s (6 mph) during the cooler months. This soothing wind intrigue invites both locals and visitors to savor the crisp winter air, perfect for outdoor explorations and enjoying Si'an's enchanting winter landscape.
Weather in Si'an varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Si'an, 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 minimum of -5°C (22°F) to a maximum of 23°C (73°F), with an average of 7°C (44°F). The month sees around 52 mm (2.0 in) of precipitation over 8 days, accompanied by a humidity level of 77%. In contrast, January is colder, with temperatures dipping to a minimum of -11°C (13°F) and an average of 5°C (41°F), peaking at 20°C (68°F). Precipitation increases slightly to 68 mm (2.7 in) over the same number of days, but humidity drops to 70%. For more detailed weather insights, check out Si'an weather in January.
December and February showcase notable differences in weather patterns. December typically features a wider temperature range, with lows around -5°C (22°F) and highs reaching up to 23°C (73°F), averaging at 7°C (44°F). In contrast, February tends to be slightly cooler, with minimum temperatures dropping to -8°C (18°F) and maximums climbing to 26°C (79°F), averaging around 6°C (44°F). Precipitation is also different, with December experiencing 52 mm (2.0 in) over 8 days, while February sees increased rainfall at 71 mm (2.8 in) over 10 days. Additionally, December has higher humidity at 77%, compared to 73% in February. For more detailed insights into February weather, check out Si'an weather in February.
In December, temperatures typically range from a chilly minimum of -5°C (22°F) to a mild maximum of 23°C (73°F), averaging around 7°C (44°F). The month sees an average of 52 mm (2.0 in) of precipitation over approximately 8 days, and the humidity is around 77%.
In contrast, March experiences a more moderate climate with minimum temperatures of -1°C (30°F) and a higher average of 12°C (54°F), peaking at a warm 29°C (84°F). Precipitation increases to 106 mm (4.2 in) spread over about 13 days, and the humidity rises slightly to 82%. For more detailed insights on March weather, check out Si'an weather in March.
December and April present distinctly different weather patterns. In December, temperatures range from a chilly minimum of -5°C (22°F) to a comfortable maximum of 23°C (73°F), with an average of 7°C (44°F). The month sees about 52 mm (2.0 in) of precipitation over approximately 8 days, and the humidity level hovers around 77%. In contrast, April brings much milder conditions, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 33°C (92°F) and an average of 17°C (62°F). Rainfall increases to 81 mm (3.2 in) over the same number of days, while humidity climbs slightly to 86%. For more detailed information on weather conditions during April, you can visit Si'an weather in April.
When comparing the weather in December and May, it's evident that these months present stark contrasts. December is characterized by cooler temperatures, with minimums dropping to -5°C (22°F) and averaging around 7°C (44°F), while the maximum can reach up to 23°C (73°F). In contrast, May brings significantly warmer weather, with temperatures ranging from a minimum of 8°C (47°F) to an average of 22°C (71°F), and soaring highs of up to 37°C (99°F). Additionally, May experiences more substantial rainfall, with 135 mm (5.3 in) over 11 days compared to December's 52 mm (2.0 in) over 8 days. The humidity also increases slightly in May, averaging 85% compared to December's 77%. For a closer look at the specifics of May weather, you can visit Si'an weather in May.
The weather in December and June presents a striking contrast. December experiences cooler temperatures, with average highs around 7°C (44°F) and lows dipping to -5°C (22°F), accompanied by a modest precipitation of 52 mm (2.0 in) over approximately 8 days. In contrast, June brings much warmer weather, featuring average highs of 25°C (77°F) and lows around 14°C (58°F), along with significantly higher precipitation, totaling 257 mm (10.1 in) over about 15 days. Additionally, June has a slightly higher humidity level at 85% compared to December's 77%. For an in-depth look at June weather, you can visit Si'an weather in June.
The weather in December contrasts sharply with that of July. December temperatures range from a chilly minimum of -5°C (22°F) to a comfortable average of 7°C (44°F) and can peak at a mild 23°C (73°F). In stark contrast, July boasts significantly warmer temperatures, with a minimum of 20°C (68°F) and an average of 28°C (83°F), reaching highs of 39°C (102°F). Additionally, while December experiences only 52 mm (2.0 in) of precipitation over 8 days, July sees a substantial increase with 299 mm (11.8 in) of rainfall over 17 days, accompanied by higher humidity levels at 90%. For more insights on July’s weather, visit Si'an weather in July.
In December, temperatures range from a chilly minimum of -5°C (22°F) to a maximum of 23°C (73°F), with an average of 7°C (44°F). In contrast, August boasts much warmer temperatures, with lows of 18°C (64°F), averaging 29°C (84°F), and soaring to highs of 38°C (100°F). Additionally, December experiences lower precipitation levels at 52 mm (2.0 in) over about 8 days, while August is considerably wetter, receiving 190 mm (7.5 in) spread across 15 days. Humidity also differs notably; December has a humidity level of 77%, compared to August's higher 88%. For more details on the August weather, visit Si'an weather in August.
In December, the weather takes a significant turn with temperatures ranging from a chilly minimum of -5°C (22°F) to a pleasant maximum of 23°C (73°F), averaging around 7°C (44°F). In contrast, September boasts much warmer conditions, with temperatures starting at a minimum of 13°C (56°F) and soaring to a maximum of 36°C (98°F), resulting in an average temperature of 25°C (77°F). Additionally, December experiences lower precipitation levels at 52 mm (2.0 in) over 8 days, while September sees a higher rainfall total of 120 mm (4.7 in) across 12 days. Humidity is relatively similar in both months, with December at 77% and September slightly lower at 75%. For more detailed insights, you can check Si'an weather in September.
In December, temperatures drop significantly compared to October, with a minimum of -5°C (22°F) and an average of 7°C (44°F), while October enjoys milder temperatures, ranging from a minimum of 7°C (44°F) to an average of 19°C (66°F). The maximum temperature in December caps at 23°C (73°F), which is noticeably lower than October's peak of 34°C (93°F). Although both months receive similar amounts of precipitation, with December at 52 mm (2.0 in) and October at 50 mm (2.0 in), December typically feels colder due to its higher humidity of 77%, compared to October's 76%. For a more detailed look at October weather, visit Si'an weather in October.
In comparing the weather conditions of December and November, December is noticeably cooler with a minimum temperature dropping to -5°C (22°F) compared to November's -2°C (28°F). The average temperature in December sits at 7°C (44°F), while November boasts a significantly warmer average of 13°C (56°F). Maximum temperatures reflect this trend as well, with December reaching only up to 23°C (73°F) in contrast to November’s high of 28°C (83°F). Precipitation levels are relatively similar, with December receiving 52 mm (2.0 in) and November slightly less at 45 mm (1.8 in), both spread over 8 days. Notably, humidity remains high in both months, at 77% in December and 84% in November. For more specifics on November’s weather, you can visit Si'an weather in November.
As December settles in Si'an, the weather experiences a notable transformation compared to the preceding months. Temperatures dip significantly, ranging from chilly lows to mild highs, inviting a crispness that marks the onset of winter. With an average temperature of 7°C, the days are cooler and often overcast, contrasting sharply with the warm weather of autumn. Additionally, precipitation increases slightly, bringing about a more humid atmosphere with an average of 77% humidity. These shifts create a unique ambiance conducive to cozy indoor activities, making it a special time for reflection and preparation for the year ahead. To learn more about how these conditions compare with other months, visit Si'an Climate.