Last updated: August 21, 2025
January in Si'an, China offers a blend of brisk temperatures and scenic winter charm. With a maximum temperature peaking at 20°C (68°F) and an average hovering around 5°C (41°F), the month can feel quite chilly, especially with a minimum dipping to -11°C (13°F). Visitors can expect about 68 mm (2.7 in) of precipitation over approximately 8 days, contributing to a damp, yet invigorating atmosphere characterized by a humidity level of 70%. Embrace the crisp air and explore the unique beauty of Si'an during this enchanting winter month!
In Si'an, China, January presents a fascinating spectrum of temperatures that capture the essence of winter. With a minimum of -11°C (13°F), the month starts off with a crisp chill, often blanketing the landscape in frost. However, as the days progress, the average climbs to a comfortable 5°C (41°F), and you may even experience a surprising maximum of 20°C (68°F) on the mildest days. This notable range not only highlights the sharp contrasts typical of winter in the region but also hints at the gradual warming trend that follows in February, where temperatures continue to rise. As the month unfolds, Si’an showcases its winter charm while foreshadowing the upcoming transitions to spring.
In January, Si'an, China, experiences a modest precipitation amount of 68 mm (2.7 in), distributed over an average of 8 rainy days. This marks the beginning of a gradual increase in rainfall that continues through the winter months, as February sees a slight rise to 71 mm (2.8 in). As spring approaches, precipitation begins to surge, peaking dramatically in the summer months. The transition from the relatively dry January to the wetter spring is evident, with March reaching 106 mm (4.2 in). This upward trend culminates in a staggering 299 mm (11.8 in) in July, highlighting the pronounced seasonal shift in Si'an's climate. The data reflects not just a pattern of increasing rainfall but also the anticipation of a rich, lush landscape that follows these winter months.
In January, Si'an, China experiences a comfortable humidity level of 70%, setting the stage for the colder months ahead. This figure marks the beginning of a gradual increase as the year progresses, with February's humidity rising slightly to 73%. A notable surge occurs in the spring months, where March sees a jump to 82%, and April peaks at an impressive 86%, creating a muggy atmosphere as the weather warms. This trend continues into the summer, with July reaching 90%, the highest humidity of the year. However, as autumn approaches, humidity begins to decline, with September recording a drop to 75%. By the end of the year, December settles at a more manageable 77%, illustrating a classic cycle of increasing and decreasing humidity that characterizes the region throughout the year.
In January, Si'an, China experiences a moderate UV Index of 5, indicating an exposure risk that calls for some precautions, especially with a burn time of 30 minutes. As the month transitions into February, the UV Index increases to 6 with a high exposure category, shortening the safe burn time to 25 minutes. The trend continues to escalate dramatically through spring, reaching a very high UV Index of 9 in March, with only 15 minutes before skin begins to burn. April and May reach their peak, with the UV Index hitting an extreme level of 10 and 11 respectively, reducing burn times to a mere 10 minutes. This pattern of heightened UV exposure persists through the summer months, revealing a serious need for sun protection. As autumn approaches, the UV Index begins to taper off, falling back to 6 in November and 4 in December, resembling the more cautious conditions of January. For a detailed overview of Si'an's UV Index throughout the year, visit Si'an UV Index.
UV Risk Categories
In January, Si'an basks in a modest 152 hours of sunshine, setting the stage for the gradual brightening that unfolds over the months. As February arrives, sunshine hours climb to 201, hinting at the imminent arrival of spring. This upward trend continues through March and April, with hours reaching 231 and 251, respectively, as daylight begins to dominate the landscape. By May, the sun's embrace intensifies, peaking at 278 hours. The warmth persists, peaking in August with an impressive 300 hours, before tapering off again in the fall months. Despite witnessing a gradual decline as winter approaches, the transition from November to December retains a respectable 222 and 213 hours of sunshine, revealing a city that basks in the joy of light, even amidst the chill.
In Si'an, China, January holds a noteworthy position in the annual climate calendar, showcasing a 50% chance of sunny weather. This relatively high likelihood stands in stark contrast to the warmer months that follow, with July reaching a low of just 17% sunshine. As spring progresses, the chances of clear skies fluctuate, dipping to 25% in March before slightly rising again in September at 48%. Interestingly, the months preceding and following January—the sunniest months of December and November—offer a tantalizing glimpse of sunshine with chances of 69% and 52%, respectively. Thus, January represents not only a peak in sunny potential at the beginning of the year but also hints at a gradual transition toward improved weather as the seasons change.
In Si'an, China, January heralds a modest 10 hours of daylight, setting the stage for gradual lengthening as the year unfolds. By February and March, daylight extends to 11 hours, hinting at the approaching warmth of spring. April ushers in a delightful 12 hours, quickly followed by a flourishing 13 hours in May, as nature awakens in full bloom. The longest days occur in June with 14 hours, perfect for outdoor adventures and explorations. As summer transitions into fall, daylight gently wanes, with July and August both enjoying 13 hours before dipping to 12 hours in September. The descent continues through October and November, returning to 10 hours in December, bringing the year full circle. This subtle ebb and flow of daylight not only marks the changing seasons but also encapsulates the vibrant rhythm of life in Si'an.
In January, Si'an experiences a gentle embrace of wind, with an average speed of 2.6 m/s (6 mph), creating a serene atmosphere perfect for winter strolls. As the month transitions into February, the breeze picks up slightly, with a modest increase to 2.8 m/s (6 mph). This trend of gentle winds continues into March and April, where speeds fluctuate around 2.6 m/s (6 mph). However, it's noteworthy that as spring progresses into July, the winds grow bolder, reaching 2.9 m/s (7 mph), signaling a shift towards more dynamic weather. The following months see a decline as the winds soften again, particularly in August, dropping to a mere 2.1 m/s (5 mph). Ultimately, January sets the tone for a relatively calm wind pattern throughout the year, with moments of livelier gusts hinting at the seasonal transitions ahead.
Weather in Si'an varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Si'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit notable differences in weather patterns. January experiences a broader temperature range, with a minimum of -11°C (13°F) and a maximum of 20°C (68°F), resulting in an average temperature of 5°C (41°F). This month sees about 68 mm (2.7 in) of precipitation over 8 days, with humidity levels around 70%. In contrast, February brings slightly milder conditions, featuring temperatures ranging from -8°C (18°F) to a maximum of 26°C (79°F) and an average of 6°C (44°F). Precipitation increases marginally to 71 mm (2.8 in) over 10 days, with humidity rising to 73%. For more detailed information about February weather, you can check Si'an weather in February.
January and March present notably different weather conditions. In January, temperatures can drop to a chilling minimum of -11°C (13°F), with an average of 5°C (41°F) and a maximum reaching 20°C (68°F). This month experiences around 68 mm (2.7 in) of precipitation over 8 days, accompanied by a humidity level of 70%. In contrast, March sees milder temperatures, with a minimum of -1°C (30°F), an average of 12°C (54°F), and a maximum soaring to 29°C (84°F). This month is also wetter, receiving 106 mm (4.2 in) of precipitation over 13 days, and the humidity increases to 82%. The transition from January to March heralds a shift toward warmer and wetter weather, making March a more vibrant month. For more detailed insights on the weather in March, check out Si'an weather in March.
In January, the weather is quite cold, with temperatures ranging from a frigid minimum of -11°C (13°F) to a maximum of 20°C (68°F), resulting in an average of 5°C (41°F). This month experiences moderate precipitation of 68 mm (2.7 in) over 8 days and a humidity level of 70%. In contrast, April brings a significant warming trend, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 33°C (92°F), averaging 17°C (62°F). Although April sees slightly higher precipitation at 81 mm (3.2 in) over the same 8 days, the humidity increases to 86%, contributing to a more tropical feel. For more detailed information, you can check Si'an weather in April.
January and May exhibit striking contrasts in weather patterns. In January, temperatures range from a chilly minimum of -11°C (13°F) to a mild maximum of 20°C (68°F), with an average of 5°C (41°F). The month sees around 68 mm (2.7 in) of precipitation over 8 days, and humidity hovers at about 70%. In contrast, May experiences significantly warmer temperatures, from a minimum of 8°C (47°F) to a sweltering maximum of 37°C (99°F), with an average of 22°C (71°F). Precipitation increases to 135 mm (5.3 in) over 11 days, and humidity rises to 85%. These differences highlight the transition from the cold depths of winter to the warm embrace of late spring. For more details on the weather, you can check Si'an weather in May.
January and June present starkly contrasting weather conditions. In January, temperatures can drop as low as -11°C (13°F) with an average temperature of only 5°C (41°F) and a maximum of 20°C (68°F). This month also sees moderate precipitation, averaging 68 mm (2.7 in) over about 8 days, paired with a humidity level of 70%. In contrast, June experiences much warmer temperatures, with a minimum of 14°C (58°F), an average of 25°C (77°F), and peaks reaching up to 37°C (99°F). Rainfall significantly increases in June, totaling 257 mm (10.1 in) across 15 days, along with a higher humidity level of 85%. For a more detailed insight into June's weather, you can visit Si'an weather in June.
In January, temperatures can drop as low as -11°C (13°F), with an average of 5°C (41°F) and a maximum reaching 20°C (68°F). The month sees approximately 68 mm (2.7 in) of precipitation over about 8 days, accompanied by a humidity level of 70%. In stark contrast, July experiences significantly warmer conditions, with minimum temperatures around 20°C (68°F), averaging 28°C (83°F), and peaking at an impressive 39°C (102°F). Additionally, July sees much higher precipitation at 299 mm (11.8 in) across 17 days, coupled with increased humidity of 90%. For a detailed look at the weather patterns in July, visit Si'an weather in July.
January and August present striking contrasts in weather. In January, temperatures can drop to a minimum of -11°C (13°F), with an average of 5°C (41°F) and a maximum of 20°C (68°F). This winter month sees around 68 mm (2.7 in) of precipitation over approximately 8 days, accompanied by a humidity of 70%. In stark contrast, August experiences significantly warmer temperatures, with a minimum of 18°C (64°F), averaging 29°C (84°F), and peaking at 38°C (100°F). The summer month receives much more rainfall, totaling 190 mm (7.5 in) across about 15 days, coupled with higher humidity levels at 88%. For more detailed information on the weather patterns, you can visit Si'an weather in August.
In January, temperatures in Si'an are significantly cooler, with a minimum of -11°C (13°F) and an average of around 5°C (41°F). The month experiences about 68 mm (2.7 in) of precipitation over approximately 8 days, coupled with relative humidity averaging 70%. In contrast, September showcases much warmer conditions, with minimum temperatures around 13°C (56°F) and an average soaring to 25°C (77°F), peaking at a sweltering 36°C (98°F). Precipitation increases to 120 mm (4.7 in), occurring over 12 days, with humidity slightly higher at 75%. For more detailed information, check out Si'an weather in September.
January and October present contrasting weather conditions. In January, temperatures can plunge to a minimum of -11°C (13°F), with an average of 5°C (41°F) and a maximum reaching 20°C (68°F). This month experiences about 68 mm (2.7 in) of precipitation over 8 days, with humidity levels around 70%. In stark contrast, October offers milder temperatures, ranging from a minimum of 7°C (44°F) to an average of 19°C (66°F) and peaking at 34°C (93°F). Although it has slightly less precipitation at 50 mm (2.0 in), it maintains a similar frequency of rainy days, and the humidity rises to 76%. For more detailed insights on October weather, you can visit Si'an weather in October.
January weather is characterized by colder temperatures, with minimums dropping to -11°C (13°F) and an average of 5°C (41°F). In contrast, November enjoys milder conditions, featuring a minimum temperature of -2°C (28°F) and an average of 13°C (56°F). While January has a maximum temperature of 20°C (68°F), November can reach as high as 28°C (83°F). Additionally, January experiences more precipitation, totaling 68 mm (2.7 in) over 8 days, compared to November's 45 mm (1.8 in) over the same number of days. The humidity levels are also higher in November at 84%, compared to January's 70%. For more specifics about the November climate, you can refer to Si'an weather in November.
When comparing the weather in January and December, January tends to be colder with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 20°C (68°F), while December has milder temperatures, with a minimum of -5°C (22°F) and a maximum of 23°C (73°F). January is also wetter, experiencing 68 mm (2.7 in) of precipitation over 8 days, compared to December's 52 mm (2.0 in) over the same number of days. Additionally, the humidity is relatively lower in January at 70%, compared to December's higher humidity at 77%. For more specific details about December weather, you can visit Si'an weather in December.
In January, Si'an experiences a distinct shift in weather, showcasing a unique blend of cool temperatures and notable humidity. Unlike the warmer months, the daytime can feel quite brisk, with temperatures often hovering around 5°C and dipping significantly at night. The average precipitation, though somewhat moderate, contributes to the chillier feel, particularly as it often arrives on about eight days of the month. This damp atmosphere combined with the characteristic winter cold sets January apart from the milder seasons, making it essential for visitors to prepare for a variety of weather conditions. For more detailed insights, visit Si'an Climate.