May Weather in Nantong, China

Last updated: August 21, 2025

In May, Nantong, China, experiences a delightful yet varied climate, with temperatures ranging from a minimum of 11°C (53°F) to a maximum of 35°C (96°F). The average temperature settles around 21°C (70°F), providing a comfortable atmosphere for outdoor activities. However, this period also witnesses an average precipitation of 110 mm (4.3 in) over 9 days, contributing to a notably humid environment with levels reaching 87%. Whether appreciating the warmth or navigating the occasional showers, May offers a unique blend of meteorological experiences that define this vibrant city.

May Temperature in Nantong

In Nantong, China, May marks a notable transition into the warmth of summer, with temperatures soaring to an average of 21°C (70°F). This month showcases a significant upward trend, as the minimum temperature rises to 11°C (53°F) and the maximum peaks at a sizzling 35°C (96°F). As spring unfolds, the mild earlier months pave the way for the heat, making May a perfect time for outdoor activities and exploration. With temperatures comfortably climbing, locals and visitors alike can enjoy the vibrant atmosphere as nature comes into full bloom, setting the stage for the even hotter months ahead.

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

The chart illustrates May temperature patterns in Nantong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nantong, 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).
JanFebMarAprMayJunJulAugSepOctNovDec414352607076838477665645
Data source: Temperature data for Nantong generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Nantong

In May, Nantong experiences a significant increase in precipitation, with an impressive 110 mm (4.3 in) of rain, marking one of the wettest months of the year. This uptick in rainfall aligns with the overall trend of rising precipitation as the season transitions into summer. Nine days of rain punctuate the month, contributing to the lushness of the region as it prepares for the intensifying rainfall in the following months, particularly in July, when average rainfall peaks at 241 mm (9.5 in). The patterns reveal not only a shift towards wetter conditions as spring wanes, but also highlight May as a pivotal month in Nantong's annual precipitation cycle, bridging the gentler spring showers and the summer deluge.

May Precipitation Trends in Nantong

The chart displays monthly precipitation patterns in Nantong, 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 Nantong, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec48526171110133241173145514942
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Nantong

In Nantong, China, May marks the transition into the humid summer season, with humidity levels maintaining a consistent 87%. This pattern reflects a gradual increase from the drier months of January through April, where humidity climbs steadily from 70% in January to 87% in April. As the region heads into June and July, residents can expect even higher humidity levels, reaching 89% and 93% respectively. This upward trend indicates a significant shift towards a more tropical climate, with May serving as a pivotal month that blends the remnants of spring's mildness with the impending heat of summer. Overall, the humidity levels in Nantong offer a glimpse into the climate's transformation, setting the stage for a sweltering summer.

May Average Humidity in Nantong

This chart illustrates the average monthly humidity levels in Nantong, 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 Nantong is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%73%81%87%87%89%93%91%81%80%82%77%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Nantong

In Nantong, China, May marks a peak in the UV Index, continuing April's trend with an index of 10 and classified as very high exposure. This means you'll need to take precautions as the burn time is just 15 minutes—a stark contrast to the 30 minutes allowed in January. The increasing UV levels from 4 in January to 10 in both April and May illustrate a clear upward trend, urging residents and visitors alike to stay vigilant under the sun. As June approaches, the index climbs even higher to 11, indicating extreme conditions just around the corner. With this trend suggesting increasingly intense sun exposure, it's essential to stay informed and prepared. For more details on the UV Index throughout the year, visit Nantong UV Index.

Maximum UV Index Levels in Nantong for May

The chart shows the monthly maximum UV Index (UVI) for Nantong 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 Nantong typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111110864
Data source: Nantong 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 Nantong

May is a radiant highlight in the annual sunshine chart of Nantong, China, boasting 287 hours of sunshine that sets the tone for the onset of summer. This month marks a significant increase from April's 257 hours, showcasing a vibrant transition into sunnier days. As temperatures rise, the daylight hours continue to trend upward—May serves as a precursor to the sun-drenched August, which tops the list with 305 hours. The consistent climb from January's mere 159 hours to the generous sunlight of May illustrates not only the awakening of nature but also invites locals and visitors alike to bask in the warmth and beauty that spring brings to this coastal city.

Monthly Sunshine Duration in Nantong: May Highlighted

The May sunshine duration represents the total number of hours Nantong 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.
JanFebMarAprMayJunJulAugSepOctNovDec159h213h243h257h287h276h277h305h259h243h222h217h
Data source: Nantong May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Nantong During May

In Nantong, China, the likelihood of experiencing sunny weather takes a noticeable dip in May, with only a 30% chance of sun. This marks a continuation of a downward trend from the slightly brighter April, which had a 33% probability. Following the spring season, the chance of sun generally decreases further, plummeting to 26% in June and 20% by July. Interestingly, this decline is tempered by a notable increase in sun chances as the year moves into late autumn, spiking to 60% in November and peaking at 64% in December. Thus, while May offers modest sunlight potential, it sets the stage for a sunnier end to the year.

Percentage of Sunny Days in May in Nantong

The chart illustrates the percentage of sunny days in Nantong 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 Nantong experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec50%44%29%33%30%26%20%34%46%41%60%64%
Data source: Nantong May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Nantong in May

As spring gives way to summer in Nantong, China, May brings a delightful increase in daylight duration, with the sun gracing the skies for 13 hours. This is a beautiful progression from the 10 hours seen in January, gradually climbing through February and March, where daylight hovers around 11 hours, and hitting 12 hours in April. The trend of increasing daylight peaks in June at 14 hours, offering the longest days of the year, while July and August settle back to 13 hours. As the months transition into autumn, the daylight gradually decreases, mirroring the earlier increase. By the time October rolls in, Nantong experiences a return to 11 hours, before settling back at 10 hours in November and December. This rhythmic ebb and flow of daylight not only marks the changing seasons but also invites residents to savor the longer, sunnier days of May.

Average Daylight Hours in Nantong for May

The chart illustrates the variation in daylight duration in Nantong throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 17m11h 1m11h 59m12h 57m13h 47m14h 11m13h 59m13h 16m12h 20m11h 21m10h 30m10h 4m
Data source: Nantong daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Nantong

In Nantong, China, the winds of May bring a gentle breeze, with an average wind speed of 3.4 m/s (8 mph), consistent with the preceding months of March and April. This stability in wind patterns marks a transition before summer, where gusts pick up in July, reaching an average of 4.3 m/s (10 mph). Interestingly, May's mild winds serve as a bridge between the quieter spring and the more dynamic summer months. As we drift into June, a slight decline to 3.1 m/s (7 mph) hints at the shifting dynamics of the season, making May an ideal time for outdoor activities under the pleasant conditions.

Average May Wind Speed in Nantong

The chart displays monthly wind speed patterns in Nantong, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.33.63.43.43.4 m/s3.14.32.83.43.33.32.9
Data source: Nantong May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Nantong Compares to Other Months

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

When comparing the weather in May and January, the contrast is striking. May typically enjoys warmer temperatures, ranging from a minimum of 11°C (53°F) to a maximum of 35°C (96°F), with an average of 21°C (70°F). The month brings about 110 mm (4.3 in) of precipitation over approximately 9 days, alongside high humidity levels reaching 87%. In contrast, January presents a much cooler climate, with temperatures dipping as low as -8°C (17°F) and averaging just 5°C (41°F), while the maximum temperature reaches 18°C (65°F). There’s significantly less precipitation in January at 48 mm (1.9 in) over about 7 days, and the humidity sits at a lower 70%. For a more detailed overview of January weather, you can check Nantong weather in January.

May weather is significantly warmer and more humid compared to February. With average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 35°C (96°F), May brings a pleasant warmth, culminating in an average temperature of 21°C (70°F). In contrast, February experiences much cooler temperatures, with a minimum of -4°C (26°F) and a maximum of 23°C (73°F), resulting in an average of only 6°C (43°F). Additionally, May sees more precipitation, accumulating 110 mm (4.3 in) over 9 days along with higher humidity at 87%, unlike February, which has 52 mm (2.1 in) of rain over the same number of days and a lower humidity of 73%. For a detailed look at February's weather, visit Nantong weather in February.

In comparing the weather of March and May, significant differences can be observed. March typically experiences cooler temperatures, with a minimum of 1°C (35°F) and an average of 11°C (52°F), while May sees much warmer conditions, with a minimum of 11°C (53°F) and an average of 21°C (70°F). The maximum temperatures also reflect this warming trend, peaking at 26°C (79°F) in March and soaring to 35°C (96°F) in May. Additionally, May is considerably wetter, with 110 mm (4.3 in) of precipitation over 9 days, compared to March's 61 mm (2.4 in) spread across 10 days. Humidity levels slightly increase from 81% in March to 87% in May, indicating a more humid climate as summer approaches. For more detailed information, check out this link: Nantong weather in March.

In comparing the weather of April and May, May presents a significant increase in temperature, with a minimum of 11°C (53°F) and an average high of 21°C (70°F), compared to April's minimum of 6°C (42°F) and an average high of 16°C (60°F). Additionally, May reaches peak temperatures of 35°C (96°F), showcasing a warmer climate as spring progresses. Precipitation also increases in May, totaling 110 mm (4.3 in) over 9 days, compared to April's 71 mm (2.8 in) over just 8 days, although the humidity remains consistent at 87% for both months. For more detailed information, you can check out Nantong weather in April.

May and June in Nantong exhibit notable differences in weather conditions. May experiences a wider temperature range, with minimums around 11°C (53°F) and maximums reaching up to 35°C (96°F), while June presents warmer temperatures, with minimums of 17°C (62°F) and maximums climbing to 36°C (98°F). Precipitation rises slightly in June to 133 mm (5.2 in) over about 11 days, compared to May's 110 mm (4.3 in) over 9 days. Furthermore, the humidity remains high in both months, increasing slightly from 87% in May to 89% in June. For a more detailed look at June's weather specifics, you can refer to Nantong weather in June.

May and July present striking contrasts in weather conditions. In May, temperatures range from a cool 11°C (53°F) to a pleasant 35°C (96°F), with an average of 21°C (70°F). The month experiences about 110 mm (4.3 in) of rainfall over 9 days, and the humidity is relatively high at 87%. In comparison, July sees warmer temperatures, with minimums of 19°C (67°F), averages soaring to 28°C (83°F), and maximums reaching a blistering 40°C (104°F). Rainfall increases significantly to 241 mm (9.5 in) over 17 days, and humidity rises to 93%, creating a much more oppressive atmosphere. For more specific details, you can check Nantong weather in July.

In May, the weather is characterized by mild temperatures, with a minimum of 11°C (53°F) and an average of 21°C (70°F), reaching a maximum of 35°C (96°F). However, this month also sees a considerable amount of precipitation, averaging 110 mm (4.3 in) over 9 days, along with high humidity levels at 87%. In contrast, August experiences warmer conditions with a minimum temperature of 21°C (71°F) and an average of 29°C (84°F), peaking at 38°C (100°F). Precipitation is more substantial in August, totaling 173 mm (6.8 in) across 15 days, with humidity slightly higher at 91%. For a more detailed look at August weather, check out Nantong weather in August.

May and September offer distinct weather profiles, highlighting the transition from spring to early autumn. In May, temperatures range from a cooler minimum of 11°C (53°F) to a warmer maximum of 35°C (96°F), with an average of 21°C (70°F). The month experiences significant precipitation, totaling 110 mm (4.3 in) over about 9 days, alongside high humidity at 87%. In contrast, September presents milder evenings with a minimum temperature of 17°C (62°F) and slightly warmer daytime averages at 25°C (77°F), peaking at 34°C (94°F). Rainfall is more pronounced, reaching 145 mm (5.7 in) over 11 days, but the humidity is lower at 81%. For more detailed insights on September's weather, visit Nantong weather in September.

In May, temperatures range from a minimum of 11°C (53°F) to a maximum of 35°C (96°F), with an average of 21°C (70°F). The month experiences higher precipitation levels, totaling 110 mm (4.3 in) over about 9 days, along with a relatively high humidity of 87%. In contrast, October sees slightly cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 32°C (89°F), averaging around 19°C (66°F). Precipitation significantly decreases to 51 mm (2.0 in) over just 6 days, and humidity is lower at 80%. For more information, check out Nantong weather in October.

May and November present contrasting weather patterns. In May, temperatures range from a mild 11°C (53°F) at night to a scorching 35°C (96°F) during the day, with an average temperature of 21°C (70°F). The month is characterized by high humidity at 87% and considerable rainfall, totaling 110 mm (4.3 in) over about 9 days. In contrast, November brings cooler conditions, with temperatures dipping to a minimum of 2°C (36°F) and peaking at 27°C (80°F), resulting in an average of 14°C (57°F). Precipitation is significantly lower in November at 49 mm (1.9 in) across 6 days, and humidity also decreases to 82%. For more details, you can check Nantong weather in November.

In May, the weather is characterized by warm temperatures, with a minimum of 11°C (53°F) and soaring highs reaching up to 35°C (96°F). The month experiences considerable humidity at 87%, along with approximately 110 mm (4.3 in) of rainfall spread over 9 days, creating a lush atmosphere.

In contrast, December brings a significant drop in temperature, with lows plummeting to -6°C (21°F) and a milder maximum of 19°C (67°F). The average temperature settles around 7°C (45°F), and precipitation decreases to 42 mm (1.6 in) over 7 days, accompanied by lower humidity at 77%. This stark difference in weather highlights how May enjoys warm, humid conditions while December transitions into a chillier, drier climate. For more detailed information, you can check Nantong weather in December.

Compare Nantong's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Nantong

As May unfolds in Nantong, the weather begins to shift, bringing a blend of warmth and humidity that sets the stage for a vibrant early summer. Unlike the cooler months, May sees temperatures rise significantly, with days often reaching the mid-30s°C, creating an inviting yet muggy atmosphere. While precipitation is present, with a handful of rainy days, it's generally outweighed by the sun’s intensity. This unique balance between warmth and humidity makes May distinct, as residents and visitors can enjoy a lively environment, perfect for outdoor activities. For a more detailed understanding of what to expect throughout the year, explore the Nantong Climate.