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May Weather in Si'en, China

Last updated: August 22, 2025

In May, the average temperature in Si'en, China hovers around a pleasant 24°C (76°F). However, be prepared for fluctuations, as it can dip to a minimum of 13°C (56°F) and soar to a maximum of 36°C (97°F). Expect a fair amount of rain, with 292 mm (11.5 in) of precipitation spread over 22 days, resulting in an average humidity of 84%. Stay hydrated and enjoy the vibrant atmosphere!

May Temperature in Si'en

In May in Si'en, the average temperature is 24°C (76°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 13°C (56°F). This diverse temperature range makes it a great time for travelers to enjoy both warm days and cooler evenings.

May Weather in Si'en: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Si'en, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si'en, May typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (97°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec525463697680828280706354
Data source: Temperature data for Si'en 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 Si'en

In Si'en in May, the precipitation amount is 292 mm (11.5 in), occurring over a span of 22 days.

May Precipitation Trends in Si'en

The chart displays monthly precipitation patterns in Si'en, 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 Si'en, May typically receives around 292 mm (11.5 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec80941841912924292582611701319056
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Si'en

In Si'en in May humidity is 84%. With an average temperature of 24°C (76°F), this humidity feels like a warm, damp embrace that can make outdoor activities feel sticky and uncomfortable, requiring frequent breaks in the shade and plenty of hydration for travelers.

May Average Humidity in Si'en

This chart illustrates the average monthly humidity levels in Si'en, 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 Si'en is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%67%70%67%84%87%89%86%66%66%69%68%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Si'en

In Si'en in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Si'en.

Maximum UV Index Levels in Si'en for May

The chart shows the monthly maximum UV Index (UVI) for Si'en 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 Si'en typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79111113121313111086
Data source: Si'en 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 Si'en Compares to Other Months

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

This table compares monthly weather conditions in Si'en, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)80 mm (3.1 inches)59%high
February Weather12°C (55°F)94 mm (3.7 inches)67%very high
March Weather17°C (63°F)184 mm (7.2 inches)70%extreme
April Weather20°C (69°F)191 mm (7.5 inches)67%extreme
May Weather24°C (76°F)292 mm (11.5 inches)84%extreme
June Weather27°C (80°F)429 mm (16.9 inches)87%extreme
July Weather28°C (83°F)258 mm (10.1 inches)89%extreme
August Weather28°C (83°F)261 mm (10.3 inches)86%extreme
September Weather27°C (80°F)170 mm (6.7 inches)66%extreme
October Weather21°C (71°F)131 mm (5.1 inches)66%very high
November Weather17°C (63°F)89 mm (3.5 inches)69%very high
December Weather12°C (54°F)56 mm (2.2 inches)68%high

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