Haikou weather in September 2025

Expect 88°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Haikou in September. Check more long-term weather averages for Haikou in September before you book your next holiday to China in 2025/2026.

  • 88°F maximum daytime temperature in September in Haikou88
    88°F max day temperature
  • 7 hours of sunshine per day
  • 17 days with some rainfall in September in Haikou17
    17 days with some rainfall
  • 75°F minimum night-time temperature in September in Haikou75
    75°F 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
  • 11.6 inches monthly rainfall in September in Haikou11.6
    11.6 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Haikou11
    11+ (Extreme) UV index
  • 82°F sea temperature in September in Haikou82
    82°F 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)  |  Imperial (°F)

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How hot is it in Haikou in September?

Daytime temperatures usually reach 88°F in Haikou in September with high heat and humidity, falling to 75°F at night.

How sunny is it in Haikou in September?

There are normally 7 hours of bright sunshine each day in Haikou in September - that's 55% of daylight hours.

How warm is the sea around Haikou in September?

The average sea temperature around Haikou in September is 82°F.

Does it rain in Haikou in September?

There are usually 17 days with some rain in Haikou in September and the average monthly rainfall is 11.6 inches.

What is the chance of a typhoon in Haikou in September?

On average 3.7 days in September in Haikou are likely to be affected by the passage of one or more tropical storms.

Haikou September sunrise & sunset times

Browse the sunrise and sunset times for Haikou in September 2025. Select a month to view Haikou sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:23 18:54
Monday, 15th September 2025 06:26 18:41
Tuesday, 30th September 2025 06:29 18:28

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