Haikou weather in August
In August, Haikou has an average high of 30 °C86 °F and an average low of 26 °C80 °F, with about 313 mm12 in of precipitation. It is the 3rd warmest month of the year and the wettest.
How August compares with other months
Compared with July, August is about the same temperature and wetter by 77 mm3.0 in. Compared with September, August is 0.5 °C0.9 °F warmer on average and wetter by 20 mm0.8 in. Daylight lasts about 12.8 hours around the middle of the month. Average relative humidity is 87% and the average cloud amount 68%.
Is August a good time to visit Haikou?
August is not among the most comfortable months by our comfort score: it is hot (average high 30 °C86 °F), it is fairly wet (313 mm12 in) and it is humid (87%). The most comfortable months in Haikou are December–March.
What to wear in August
For Haikou in August, pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Haikou | 3086 | 2680 | 31312 |
| Xiuying | 3086 | 2780 | 32413 |
| Wenchang | 3187 | 2678 | 30012 |
| Qionghai | 3086 | 2780 | 27811 |
| Nada | 3087 | 2476 | 34414 |
| Zhanjiang | 3085 | 2781 | 33813 |
| Wanning | 3086 | 2780 | 27811 |
| Wuzhishan | 3086 | 2374 | 32513 |
| Lianjiang | 3187 | 2578 | 33613 |
Nearby places that are more than 1 °C1.8 °F cooler: Wuzhishan.
Other months in Haikou
- January21 °C70 °F / 17 °C62 °F
- February23 °C73 °F / 17 °C63 °F
- March25 °C77 °F / 20 °C67 °F
- April28 °C83 °F / 23 °C73 °F
- May30 °C86 °F / 25 °C77 °F
- June30 °C87 °F / 27 °C80 °F
- July30 °C87 °F / 26 °C80 °F
- August30 °C86 °F / 26 °C80 °F
- September29 °C85 °F / 26 °C79 °F
- October28 °C82 °F / 24 °C76 °F
- November25 °C77 °F / 22 °C71 °F
- December22 °C71 °F / 18 °C65 °F
Frequently asked questions
How warm is Haikou in August?
In August the average high in Haikou is 30 °C (86 °F) and the average low is 26 °C (80 °F).
Does it rain a lot in Haikou in August?
On average about 313 mm (12.3 in) of precipitation falls in August; it ranks 1st of the 12 months.
Is August the warmest month in Haikou?
No. The warmest month in Haikou is June, with an average high of 30 °C (87 °F). The coldest month is January, with an average low of 17 °C (62 °F).
How long is the day in Haikou in August?
In the middle of August the day in Haikou lasts about 12.8 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Haikou in August?
The average relative humidity in August is about 87%. Combined with warm days, it can feel muggy.
How cloudy is Haikou in August?
On average about 68% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.