Haikou weather in May 2026

Expect daytime maximum temperatures of 32°C in Haikou, China in May and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 16 days with some rainfall and typically 189 mm of rainfall in the month.

  • 32°C maximum daytime temperature in May in Haikou32
    32°C max day temperature
  • 7 hours of sunshine per day
  • 16 days with some rainfall in May in Haikou16
    16 days with some rainfall
  • 24°C minimum night-time temperature in May in Haikou24
    24°C min night temperature
  • 13 hours of daylight per day in May in Haikou13
    13 hours of daylight per day
  • Very high heat & humidity in May in HaikouVH
    Very High heat & humidity
  • 189 mm monthly rainfall in May in Haikou189
    189 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Haikou11
    11+ (Extreme) UV index
  • 26°C sea temperature in May in Haikou26
    26°C sea temperature

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The May weather guide for China (Haikou) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Haikou in May?

Daytime temperatures usually reach 27°C in Haikou in May with low heat and humidity, falling to 13°C at night.

How sunny is it in Haikou in May?

There are normally 9 hours of bright sunshine each day in Haikou in May - that's 65% of daylight hours.

Does it rain in Haikou in May?

There are usually 6 days with some rain in Haikou in May and the average monthly rainfall is 29mm.

Haikou May sunrise & sunset times

Browse the sunrise and sunset times for Haikou in May 2026. Select a month to view Haikou sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 06:10 19:02
Saturday, 16th May 2026 06:02 19:08
Sunday, 31st May 2026 05:59 19:14

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