Last updated: August 21, 2025
May in Si'an, China often brings a mix of experiences for residents and visitors alike. With maximum temperatures reaching up to 35°C (95°F) and an average temperature of 21°C (69°F), the weather can be quite warm, contrasting sharply with nighttime lows dipping to 9°C (49°F). This dynamic temperature range provides a wonderful opportunity for outdoor activities during the day while requiring a light jacket in the cooler evenings. However, be prepared for some precipitation, as May averages 112 mm (4.4 in) of rain over approximately 9 days, making it one of the wetter months of the year. Humidity stays high at 87%, adding to the overall richness of the climate. Whether you're navigating the bustling streets or enjoying scenic views, May's weather in Si'an combines warmth with refreshing showers, enriching the vibrant cultural experience of this historic city.
In May, Si'an, China, welcomes the warmth of spring, showcasing a noticeable transition in temperatures. With a minimum of 9°C (49°F), the days start to feel pleasantly mild, while the average temperature climbs to a comfortable 21°C (69°F). This month also brings the maximum temperatures soaring to 35°C (95°F), marking the beginning of summer's embrace. The steady rise from April, which boasts lower averages and maximums, highlights a significant warming trend, inviting both locals and visitors to enjoy outdoor activities as nature bursts into full bloom.
In May, Si'an, China experiences a significant uptick in precipitation, with an impressive 112 mm (4.4 in) of rainfall over 9 days. This marks a sharp increase compared to previous months, particularly from April's 70 mm. As spring transitions into summer, May serves as a pivotal month for moisture, setting the stage for the heavier rains that follow in June, which averages 131 mm. The trend indicates that the onset of summer brings not only more rain but also a greater number of rainy days, peaking in July with 231 mm spread across 17 days. This increase in both rainfall and rainy days highlights the region's shift towards a more humid climate as the year progresses, creating a lush landscape that many residents and visitors cherish.
In Si'an, China, the month of May marks a notable peak in humidity, registered at 87%. This increase continues the upward trajectory observed since the earlier months of the year, with humidity gradually rising from 67% in January to 86% in April. As the region transitions into the summer months, June further escalates the humidity levels to 90%, underscoring a trend of marked moisture that persists through the hottest season, peaking in July at 95%. The consistent climb in humidity indicates a shift towards a more tropical climate as the year progresses, with May standing out as a clear precursor to the more oppressive conditions of summer.
May in Si'an, China, marks a continuation of the intense solar exposure as the UV Index remains at a striking 10, categorizing it as very high. This trend, beginning in April, highlights the increasing vulnerability to skin damage, with a burn time of only 15 minutes for unprotected skin. As temperatures rise and sunlight becomes more direct, it's crucial for residents and visitors alike to take precautionary measures. This pattern of significant UV levels persists into June, and even the preceding months show a sharp increase from a moderate 4 in January to this peak. To stay informed about the UV levels throughout the year, explore more at Si'an UV Index.
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May shines brightly in Si'an, China, as the city basks in 288 hours of glorious sunshine—its peak for the year. This radiant month follows a steady progression of increasing daylight, starting with 166 hours in January and growing to 265 hours by April. The trend continues seamlessly, allowing May to emerge as a highlight before the summer months. While June and July maintain a strong sun presence with 287 and 286 hours respectively, nothing quite compares to the vibrant energy of May, which marks a celebratory point in the year. As the days grow longer and warmer, residents and visitors alike can fully embrace the beauty and vitality that this month brings to Si'an.
In Si'an, China, the likelihood of sunny weather experiences a notable dip in May, with only a 30% chance of sunshine. This trend marks a continuation of a gradual decline from April's 33%, following a seasonal peak in January with 49% sunshine likelihood. As the year progresses, the sunny days seem to diminish, particularly during the summer months, when July faces its lowest point at 21%. However, the promise of better weather returns in autumn, with September rising to 45% and November offering an uplifting 60% chance of sun. Overall, May represents a transitional period where sunshine becomes less frequent, hinting at the shifting climate as the seasons transition.
As the calendar transitions from winter to spring in Si'an, China, daylight hours gradually increase, peaking beautifully in May with 13 hours of sunlight. This month marks a vibrant shift from the 10 hours of daylight in January, drawing residents outdoors to bask in the longer days. Following May, June takes advantage of the summer solstice, offering the most daylight at 14 hours, creating a perfect backdrop for outdoor activities. However, as summer wanes into early autumn, daylight begins to taper off again, with September seeing a decrease back to 12 hours. This cyclical pattern highlights Si'an's dynamic seasonal changes, where each month brings its own unique share of sunlight, inviting both locals and visitors to embrace the rhythm of nature.
In May, Si'an, China experiences a gentle breeze with an average wind speed of 3.4 m/s (8 mph), continuing a mild trend established in the preceding months. The wind is not particularly strong, reflecting the calm atmosphere that often characterizes spring. As temperatures rise and nature awakens, the gentle currents provide a refreshing respite, encouraging outdoor activities amid blossoming landscapes. This pattern of stable winds leads seamlessly into summer, where they strengthen, reaching up to 4.5 m/s (10 mph) in July, while the preceding months maintain a sense of tranquility. Overall, May's wind conditions enhance the serene beauty of Si'an, offering a pleasant backdrop to the vibrant seasonal changes.
Weather in Si'an varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Si'an, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather patterns. In May, temperatures range from a minimum of 9°C (49°F) to a scorching maximum of 35°C (95°F), with an average of 21°C (69°F), creating a warm and humid atmosphere with 87% humidity and 112 mm (4.4 in) of rainfall over about 9 days. In comparison, January is much cooler, with temperatures dropping to a minimum of -8°C (17°F) and a maximum of 18°C (64°F), leading to an average of just 5°C (41°F). January experiences significantly less precipitation, with 47 mm (1.8 in) falling over 8 days and a lower humidity level of 67%. These differences highlight the dramatic seasonal shift from the warmth of late spring to the chill of mid-winter. For more details on January weather, you can visit Si'an weather in January.
May and February present contrasting weather patterns. In May, temperatures range from a minimum of 9°C (49°F) to a scorching maximum of 35°C (95°F), with an average temperature of 21°C (69°F). This month sees higher humidity at 87% and more precipitation, totaling 112 mm (4.4 in) over 9 days. In contrast, February experiences much cooler conditions, with temperatures ranging from a chilling minimum of -5°C (23°F) to a mild maximum of 24°C (75°F) and an average of 6°C (43°F). The precipitation is lower at 52 mm (2.0 in), occurring over 8 days, and humidity levels are also reduced at 69%. For a detailed look at February weather, you can refer to Si'an weather in February.
In comparing the weather of May and March, it becomes evident that May is significantly warmer and more humid. While March sees temperatures ranging from a chilly minimum of 0°C (33°F) to a pleasant maximum of 27°C (81°F), May boasts a broader range with temperatures from a minimum of 9°C (49°F) to a sweltering maximum of 35°C (95°F). The average temperature in March is just 11°C (51°F), compared to May’s more comfortable 21°C (69°F). Additionally, May experiences nearly double the precipitation of March, with 112 mm (4.4 in) spread over 9 days, compared to March's 56 mm (2.2 in) in the same number of days. Notably, humidity levels also peak in May at 87%, surpassing March’s 79%. For more details on March weather, you can visit Si'an weather in March.
In comparing the weather between April and May, it's evident that May experiences warmer temperatures, with a minimum of 9°C (49°F) and an average of 21°C (69°F), while April's temperatures range from a minimum of 4°C (39°F) to an average of 15°C (59°F). Additionally, May sees a higher maximum temperature of 35°C (95°F) compared to April's 30°C (87°F). Precipitation in May also increases, totaling 112 mm (4.4 in) over 9 days, compared to April's 70 mm (2.8 in) over 8 days. Both months have similar humidity levels, with May at 87% and April slightly lower at 86%. For more detailed weather patterns, you can visit Si'an weather in April.
In comparing the weather between May and June, we can see a notable increase in temperatures and humidity. May's temperatures range from a minimum of 9°C (49°F) to a maximum of 35°C (95°F), with an average of 21°C (69°F). In contrast, June experiences milder nighttime temperatures with a minimum of 16°C (61°F) and a higher maximum of 37°C (99°F), leading to an average of 24°C (76°F). Precipitation also sees a slight increase in June, with 131 mm (5.2 in) recorded over 10 days, compared to May's 112 mm (4.4 in) over 9 days. The humidity remains relatively high in both months, with June slightly higher at 90% compared to May's 87%. To explore more about June's weather, check out Si'an weather in June.
May and July exhibit notable differences in weather patterns. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 35°C (95°F), with an average of 21°C (69°F) and relatively high humidity at 87%. The month also sees about 112 mm (4.4 in) of precipitation over approximately 9 days. In contrast, July is significantly warmer, with minimum temperatures starting at 18°C (65°F) and peaking at a sweltering 39°C (103°F). The average temperature rises to 28°C (82°F), and humidity increases to 95%. Rainfall in July is more pronounced, totaling 231 mm (9.1 in) over 17 days. For more insights, visit Si'an weather in July.
In comparing the weather in May and August, it’s clear that August tends to be hotter and more humid. May experiences a wider range of temperatures, with minimums dropping to 9°C (49°F) and maximums reaching 35°C (95°F), while August sees warmer minimums of 21°C (71°F) and reaches a maximum of 37°C (99°F). Precipitation is also higher in August, averaging 192 mm (7.6 in) over 14 days compared to May’s 112 mm (4.4 in) over 9 days. Additionally, humidity levels rise slightly in August, averaging 92% compared to 87% in May. For more detailed insights specifically about August, you can visit Si'an weather in August.
May typically offers a warm transition into summer, with temperatures ranging from a cool 9°C (49°F) to a high of 35°C (95°F) and an average of 21°C (69°F). However, it can be quite humid at 87%, and rainfall is not uncommon, with about 112 mm (4.4 in) over approximately 9 days. In contrast, September ushers in slightly cooler conditions, with minimum temperatures of 16°C (61°F) and an average of 24°C (76°F), peaking at 34°C (94°F). Although September experiences more precipitation overall, at 142 mm (5.6 in) over 11 days, the humidity is lower at 79%. For more details, you can check Si'an weather in September.
May and October present distinct weather patterns, reflecting the transition from spring to autumn. In May, temperatures range from a minimum of 9°C (49°F) to a maximum of 35°C (95°F), with an average temperature of 21°C (69°F), making it a warm month. However, it also sees substantial precipitation, with about 112 mm (4.4 in) falling over 9 days and high humidity levels at 87%.
In contrast, October experiences slightly cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 32°C (90°F), leading to a lower average of 19°C (66°F). The month has significantly reduced rainfall, totaling 58 mm (2.3 in) over 7 days, and lower humidity at 76%. This shift makes October a more comfortable and drier month compared to May. For more details, you can check Si'an weather in October.
In May, temperatures range from a chilly minimum of 9°C (49°F) to a sweltering maximum of 35°C (95°F), with an average of 21°C (69°F), making it a warm month. The weather is also quite humid at 87%, with a substantial rainfall of 112 mm (4.4 in) spread over 9 days. In contrast, November sees much cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 27°C (81°F), averaging at 13°C (56°F). This month also experiences lower humidity at 77% and less precipitation at 53 mm (2.1 in) over just 7 days. For more specific details on November conditions, you can check Si'an weather in November.
May and December exhibit strikingly contrasting weather patterns. In May, temperatures range from a minimum of 9°C (49°F) to a scorching maximum of 35°C (95°F), with an average of 21°C (69°F). This month sees substantial rainfall, totaling 112 mm (4.4 in) over about 9 days, accompanied by high humidity at 87%. In contrast, December experiences much cooler conditions, with temperatures ranging from a chilling -7°C (20°F) to a mild 20°C (68°F), averaging around 7°C (45°F). Precipitation is significantly less in December at 44 mm (1.7 in) over 8 days, and humidity drops to 73%. For a more detailed look at December weather, check out Si'an weather in December.
In May, Si'an embraces a beautiful transition into warmer weather, as temperatures rise and the vibrant landscapes awaken. With an average temperature that can climb up to 35°C (95°F), days are delightfully warm, contrasting with the cooler evenings that can dip to around 9°C (49°F). This month experiences a moderate level of precipitation spread over a few days, contributing to the lush greenery that this season is known for, complementing the high humidity of 87% that keeps the air feeling fresh. As May stands apart from the cooler months that precede it, it signals the beginning of a more vibrant and lively atmosphere in Si'an. For a deeper understanding of the seasonal patterns, visit Si'an Climate.