May Weather in Jiangnan, China

Last updated: August 21, 2025

In May, Jiangnan, China, experiences a delightful transition into summer, characterized by a maximum temperature soaring to 34°C (93°F) and a pleasant average of 22°C (72°F). However, the nights can be cool, with minimum temperatures dropping to 11°C (52°F). This period is marked by significant precipitation, totaling 165 mm (6.5 in) over 16 days, leading to an humidity level of around 87%, creating a lush and vibrant landscape. The combination of warmth and moisture makes May an enchanting time to explore the natural beauty of Jiangnan, despite the brief rain showers that can frequently refresh the air.

May Temperature in Jiangnan

In May, Jiangnan, China, experiences a delightful transition into warmer weather, marked by a significant rise in temperatures. The minimum temperature hovers around 11°C (52°F), while the average temperature reaches a comfortable 22°C (72°F), peaking at a balmy 34°C (93°F). This month stands out as a pivotal point in the yearly temperature cycle, as the region shifts from the cooler sensations of spring to the early warmth of summer heat. The gradual increase in warmth is evident from previous months, with temperatures climbing steadily from the cooler days of April, making May an ideal time for outdoor activities and enjoying the lush landscapes of Jiangnan under the abundant sunshine.

May Weather in Jiangnan: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Jiangnan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jiangnan, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec525258647278838279726456
Data source: Temperature data for Jiangnan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Jiangnan

May marks a significant increase in precipitation in Jiangnan, China, with an impressive 165 mm (6.5 in) of rain accumulating over 16 days. This surge is not only a continuation of the trend seen in April but also a prelude to the rainy season ahead, as June and August are expected to receive even more rainfall. The steady rise in precipitation from January's modest 52 mm (2.0 in) to May's robust figure reflects the transition from the drier winter months to the lush, verdant conditions of late spring. With the rainiest months just around the corner, May stands out as a pivotal time when the region prepares for the prolific downpours that define its summer climate.

May Precipitation Trends in Jiangnan

The chart displays monthly precipitation patterns in Jiangnan, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Jiangnan, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec528814010616530212730094697546
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Jiangnan

As the spring flowers bloom in Jiangnan, May ushers in a peak in humidity, soaring to an average of 87%. This escalating moisture level builds on a steady increase from January's 66%, gradually climbing through the months as the region transitions from the cooler days of early spring to the warmth of summer. Following April's already high humidity of 84%, May sets the stage for the sweltering conditions that characteristically define the upcoming summer months. Notably, this rise aligns with a notable spike in July, when humidity levels reach 88%—the highest of the year—before beginning to taper off again in the autumn. Thus, May represents a significant turning point in Jiangnan's climatic rhythm, where lush greenery thrives under the embrace of warmth and moisture.

May Average Humidity in Jiangnan

This chart illustrates the average monthly humidity levels in Jiangnan, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Jiangnan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%71%81%84%87%84%88%85%67%72%77%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Jiangnan

In May, Jiangnan, China, experiences a notable spike in the UV Index, reaching a peak of 12, classified as extreme. This significant elevation in UV radiation means that outdoor enthusiasts should exercise caution, as the potential for sunburn occurs in just 10 minutes of exposure. This trend of increasing UV levels is evident from the previous months, with April recording a UV Index of 11, and it foreshadows a continuation into June with an even higher index of 13. As the summer approaches, residents and visitors alike should prioritize sun protection to ensure a safe and enjoyable experience under the sun. For more details on UV exposure, check out the full information on the Jiangnan UV Index.

Maximum UV Index Levels in Jiangnan for May

The chart shows the monthly maximum UV Index (UVI) for Jiangnan in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Jiangnan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6910111213121311986
Data source: Jiangnan May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Jiangnan

May in Jiangnan, China, shines brightly with 274 hours of sunshine, marking a peak just before the gentle decline into the summer months. This notable increase from 257 hours in April reflects the region's shift towards the warm embrace of late spring, bringing along vibrant blossoms and lush landscapes. Following May, the sun remains generous in June, offering 228 hours, before it climbs to its zenith in July with an impressive 313 hours. This upward trend in sunshine hours continues through the summer, fostering a lively atmosphere filled with outdoor activities. However, as the year progresses into autumn, a gradual tapering begins, with sunshine hours receding steadily, illustrating the seasonal ebb and flow. Overall, May serves as a delightful bridge between the freshness of spring and the exuberance of summer, making it a cherished month for both residents and travelers alike.

Monthly Sunshine Duration in Jiangnan: May Highlighted

The May sunshine duration represents the total number of hours Jiangnan experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec170h211h242h257h274h228h313h304h279h249h211h204h
Data source: Jiangnan May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Jiangnan During May

As May approaches in Jiangnan, China, the likelihood of sunny weather significantly declines, with only a 13% chance of sunshine. This marks a stark contrast to the sunnier days seen in the earlier months of the year, where January leads with a 55% chance of clear skies. The trend reveals an unsettling drop from 26% in April to that mere 13% in May, hinting at the onset of the region's transition into a wetter season. As summer unfolds, the sun's appearances dwindle even more, reaching a notable low of 5% for June. With this pattern, residents and visitors alike may want to prepare for a month that leans more towards overcast skies, as the prospect of basking in sunlight becomes increasingly scarce.

Percentage of Sunny Days in May in Jiangnan

The chart illustrates the percentage of sunny days in Jiangnan throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Jiangnan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec55%44%33%26%13%6%23%19%50%26%33%38%
Data source: Jiangnan May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Jiangnan in May

In Jiangnan, China, daylight duration exhibits a captivating progression throughout the year. Starting with a modest 10 hours in January, the days gradually lengthen, reaching 12 hours by March and maintaining that glow through April. As May arrives, the sunlight peaks at 13 hours, ushering in the warmth of late spring and hinting at the vibrant summer ahead. This 13-hour daylight persists through the summer months of June, July, and August, offering ample time for outdoor activities and leisurely explorations. However, as autumn approaches, daylight begins to decrease again, with September witnessing a slight drop to 12 hours, followed by a gradual descent back to 10 hours in November and December. This rhythmic dance of light across seasons not only highlights the transition of time in Jiangnan but also enhances the cultural and natural beauty of the region.

Average Daylight Hours in Jiangnan for May

The chart illustrates the variation in daylight duration in Jiangnan throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 41m11h 15m12h12h 46m13h 25m13h 44m13h 34m13h12h 16m11h 30m10h 51m10h 30m
Data source: Jiangnan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Jiangnan

In Jiangnan, China, the May winds carry a gentle touch, with an average speed of 2.4 m/s (5 mph), marking a minor lull compared to the breezier months surrounding it. As spring tiptoes into summer, May's winds are notably softer than those of April, which saw a brisk 2.9 m/s (7 mph), yet still provide a refreshing respite. This tranquil period serves as a precursor to the more vigorous gusts of the coming months, particularly October, which boasts an average of 4.1 m/s (9 mph). Interestingly, while the winds begin to pick up momentum moving into summer, the pattern indicates a generally mild atmosphere during this time, embodying the serene beauty of the Jiangnan landscape, where gentle breezes harmonize with the vibrant blossoming scenery.

Average May Wind Speed in Jiangnan

The chart displays monthly wind speed patterns in Jiangnan, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.22.92.52.92.4 m/s2.63.12.72.44.13.03.4
Data source: Jiangnan May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Jiangnan Compares to Other Months

Weather in Jiangnan varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Jiangnan, focusing on differences in temperature, rainfall, humidity, and UV levels.

In May, temperatures in Jiangnan can reach a maximum of 34°C (93°F), making it significantly warmer than January's peak of 25°C (78°F). The average temperature in May is also much higher at 22°C (72°F) compared to January's average of 11°C (53°F). Additionally, May experiences greater humidity at 87%, while January has a more comfortable humidity level of 66%. Precipitation is more frequent in May, with rain falling on 16 days and totaling 165 mm (6.5 in), whereas January sees just 52 mm (2.0 in) over 7 days. For more detailed weather information, you can visit Jiangnan weather in January.

May and February exhibit distinct weather patterns. In May, temperatures rise significantly, with a minimum of 11°C (52°F) and an average high of 22°C (72°F), peaking at 34°C (93°F). This month also experiences higher humidity at 87% and increased precipitation, totaling 165 mm (6.5 in) over 16 days. In contrast, February is much cooler, featuring a minimum temperature of 1°C (34°F) and an average high of 11°C (52°F), reaching up to 25°C (77°F). Precipitation in February is also lighter, at 88 mm (3.5 in) over 10 days, with a lower humidity of 71%. For more details, check out Jiangnan weather in February.

In comparison to March, May offers significantly warmer temperatures, with average highs reaching 22°C (72°F) compared to March’s 14°C (58°F). The temperatures in May can peak at 34°C (93°F), creating a much more summer-like atmosphere, while March sees a maximum of 27°C (82°F). Despite May's higher temperatures, it also experiences more precipitation, with 165 mm (6.5 in) over 16 days, compared to March's 140 mm (5.5 in) across the same number of days. Additionally, the humidity in May is notable at 87%, slightly higher than March's 81%. For a detailed overview of March weather, check out Jiangnan weather in March.

In comparing the weather of April and May, it is evident that May experiences significantly warmer temperatures, with average highs reaching 34°C (93°F) compared to April's maximum of 29°C (85°F). The minimum temperature in May is also higher, averaging 11°C (52°F) versus 8°C (47°F) in April. Additionally, May sees increased precipitation, totaling 165 mm (6.5 in) over 16 days, while April has 106 mm (4.2 in) spread across 12 days. Humidity is slightly higher in May, averaging 87% compared to April's 84%. For more detailed insights into April's weather, visit Jiangnan weather in April.

May and June exhibit notable differences in weather patterns. In May, temperatures range from a minimum of 11°C (52°F) to a maximum of 34°C (93°F), with an average of 22°C (72°F). The month experiences significant precipitation, amounting to 165 mm (6.5 in) across 16 rainy days, accompanied by high humidity levels of 87%. In contrast, June sees warmer temperatures with a minimum of 18°C (65°F) and a maximum of 35°C (94°F), averaging 26°C (78°F). However, it is characterized by even higher precipitation levels at 302 mm (11.9 in) over 20 days, while humidity slightly decreases to 84%. For more detailed information, you can check Jiangnan weather in June.

May and July present contrasting weather patterns, with May characterized by a wider temperature range, featuring minimums of 11°C (52°F) and maximums reaching up to 34°C (93°F). The average temperature in May settles around 22°C (72°F), accompanied by significant rainfall of 165 mm (6.5 in) over 16 days, contributing to a high humidity level of 87%. In comparison, July is notably warmer, with minimums climbing to 23°C (74°F) and maximums peaking at 36°C (97°F), resulting in an average of 28°C (83°F). Rainfall during July decreases to 127 mm (5.0 in) over 15 days, while humidity remains slightly elevated at 88%. For a more detailed look at the weather in July, you can check Jiangnan weather in July.

May and August present distinct weather patterns, with May typically experiencing a wider temperature range. In May, temperatures range from a minimum of 11°C (52°F) to a maximum of 34°C (93°F), resulting in an average of 22°C (72°F). The month is characterized by significant precipitation, with 165 mm (6.5 in) falling over 16 days, accompanied by high humidity at 87%.

In contrast, August offers a warmer climate, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 35°C (96°F), leading to an average of 28°C (82°F). However, August is also wetter, receiving a total of 300 mm (11.8 in) of rain over 22 days, while maintaining a slightly lower humidity level at 85%. Overall, while both months are humid and wet, August tends to be warmer and rainier than May. For more detailed information, check out Jiangnan weather in August.

May and September present distinct weather patterns. In May, temperatures range from a cool 11°C (52°F) at night to a hot 34°C (93°F) during the day, with an average of 22°C (72°F). This month is characterized by high humidity at 87% and considerable rainfall, receiving about 165 mm (6.5 in) over 16 days. In contrast, September offers warmer nights with a minimum of 19°C (66°F) and averages around 26°C (80°F), reaching up to a maximum of 36°C (97°F). The humidity drops to a more comfortable 67%, and rainfall is significantly less, totaling 94 mm (3.7 in) over 15 days. For more insights on September weather, you can visit Jiangnan weather in September.

May and October exhibit distinct weather patterns despite similar average temperatures. In May, temperatures can range from a pleasant 11°C (52°F) to a scorching 34°C (93°F), with high humidity at 87% and significant precipitation of 165 mm (6.5 in) spread over 16 days. In contrast, October sees slightly milder minimum temperatures at 13°C (55°F) and a cap of 33°C (92°F), but it enjoys drier conditions with only 69 mm (2.7 in) of rain over 10 days and lower humidity at 72%. For more insights into October weather, check out Jiangnan weather in October.

May and November offer distinct weather patterns. In May, temperatures range from a minimum of 11°C (52°F) to a maximum of 34°C (93°F), with an average of 22°C (72°F). The month is characterized by high humidity at 87% and considerable rainfall, totaling 165 mm (6.5 in) over 16 days. In contrast, November experiences cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 29°C (84°F), averaging around 18°C (64°F). The precipitation is significantly lower, with only 75 mm (3.0 in) over 9 days, and humidity decreases to 77%. For more details on the weather in November, you can refer to Jiangnan weather in November.

May and December exhibit stark contrasts in weather patterns. In May, temperatures range from a minimum of 11°C (52°F) to a maximum of 34°C (93°F), with an average of 22°C (72°F), accompanied by high humidity at 87%. The month also sees substantial precipitation, amounting to 165 mm (6.5 in) over 16 days, making it one of the wetter months. In contrast, December experiences cooler temperatures, with a minimum of 5°C (41°F), an average of 13°C (56°F), and a maximum of 25°C (78°F). This month is much drier, receiving only 46 mm (1.8 in) of rain over 9 days, along with slightly lower humidity at 80%. For more details about December weather, you can check Jiangnan weather in December.

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Conclusion: What to Expect From May Weather in Jiangnan

As May settles over Jiangnan, the weather begins to shift significantly, marking the transition to the warmer season. With daytime temperatures reaching a pleasant average of 22°C (72°F), it’s a delightful time to explore the lush landscapes and vibrant flora. However, be prepared for increased humidity and frequent rainfall, as the region experiences about 16 days of precipitation, resulting in a total of 165 mm (6.5 in) of rain. Compared to the cooler and drier months preceding it, May presents a unique blend of warmth and moisture, making it a key month for growth and charm in Jiangnan’s natural scenery. For more insights on the distinctive weather patterns, check out Jiangnan Climate.