Haikou weather in September 2026

Expect daytime maximum temperatures of 31°C in Haikou, China in September and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 17 days with some rainfall and typically 295 mm of rainfall in the month.

  • 31°C maximum daytime temperature in September in Haikou31
    31°C max day temperature
  • 7 hours of sunshine per day
  • 17 days with some rainfall in September in Haikou17
    17 days with some rainfall
  • 24°C minimum night-time temperature in September in Haikou24
    24°C min night temperature
  • 12 hours of daylight per day in September in Haikou12
    12 hours of daylight per day
  • High heat & humidity in September in HaikouH
    High heat & humidity
  • 295 mm monthly rainfall in September in Haikou295
    295 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Haikou11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Haikou28
    28°C sea temperature

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The September 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 September?

Daytime temperatures usually reach 26°C in Haikou in September with low heat and humidity, falling to 14°C at night.

How sunny is it in Haikou in September?

There are normally 8 hours of bright sunshine each day in Haikou in September - that's 64% of daylight hours.

Does it rain in Haikou in September?

There are usually 7 days with some rain in Haikou in September and the average monthly rainfall is 42mm.

Haikou September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:23 18:54
Tuesday, 15th September 2026 06:26 18:42
Wednesday, 30th September 2026 06:29 18:28

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