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May Weather in Haimen, China

Last updated: August 22, 2025

In Haimen, China, the average temperature in May is a comfortable 21°C (70°F), though it can range from a cool 10°C (50°F) to a warm 37°C (98°F). Expect a total precipitation of 106 mm (4.2 in) over approximately 9 days, contributing to an average humidity level of 87%. Whether you're enjoying the warmth or preparing for the occasional rain, this month's weather offers a unique experience!

May Temperature in Haimen

In May in Haimen, the average temperature is 21°C (70°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 10°C (50°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm days and cooler evenings.

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

The chart illustrates May temperature patterns in Haimen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Haimen, May typically has an average temperature of 21°C (70°F), with highs reaching up to 37°C (98°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec414352607076838477665745
Data source: Temperature data for Haimen 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 Haimen

In Haimen in May, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

May Precipitation Trends in Haimen

The chart displays monthly precipitation patterns in Haimen, 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 Haimen, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec47516270106128246173158554943
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Haimen

In Haimen in May humidity is 87%. With an average temperature of 21°C (70°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities quite exhausting and requiring frequent breaks to hydrate and cool off.

May Average Humidity in Haimen

This chart illustrates the average monthly humidity levels in Haimen, 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 Haimen is approximately 87%, 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 Haimen

In Haimen in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Haimen.

Maximum UV Index Levels in Haimen for May

The chart shows the monthly maximum UV Index (UVI) for Haimen 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 Haimen typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111110864
Data source: Haimen 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.

How May Weather in Haimen Compares to Other Months

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

This table compares monthly weather conditions in Haimen, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)47 mm (1.9 inches)70%moderate
February Weather6°C (43°F)51 mm (2.0 inches)73%high
March Weather11°C (52°F)62 mm (2.5 inches)81%very high
April Weather15°C (60°F)70 mm (2.8 inches)87%very high
May Weather21°C (70°F)106 mm (4.2 inches)87%very high
June Weather24°C (76°F)128 mm (5.1 inches)89%extreme
July Weather28°C (83°F)246 mm (9.7 inches)93%extreme
August Weather29°C (84°F)173 mm (6.8 inches)91%extreme
September Weather25°C (77°F)158 mm (6.2 inches)81%very high
October Weather19°C (66°F)55 mm (2.1 inches)80%very high
November Weather14°C (57°F)49 mm (1.9 inches)82%high
December Weather7°C (45°F)43 mm (1.7 inches)77%moderate

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