Haikou weather in December
In December, Haikou has an average high of 22 °C71 °F and an average low of 18 °C65 °F, with about 49 mm1.9 in of precipitation. It is the 10th warmest month of the year and ranks 9th for precipitation.
How December compares with other months
Compared with November, December is 3.4 °C6.2 °F cooler on average and drier by 32 mm1.3 in. Compared with January, December is 1.3 °C2.4 °F warmer on average and wetter by 16 mm0.6 in. Daylight lasts about 10.9 hours around the middle of the month. Average relative humidity is 80% and the average cloud amount 66%.
Is December a good time to visit Haikou?
Yes — December is one of the most comfortable months to visit Haikou by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in December
For Haikou in December, pack light layers — T-shirts plus a light sweater or jacket.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Haikou | 2271 | 1865 | 491.9 |
| Xiuying | 2272 | 1763 | 441.7 |
| Wenchang | 2373 | 1864 | 602.3 |
| Qionghai | 2374 | 2067 | 662.6 |
| Nada | 2373 | 1458 | 451.8 |
| Zhanjiang | 2169 | 1762 | 411.6 |
| Wanning | 2374 | 2067 | 662.6 |
| Wuzhishan | 2374 | 1356 | 471.9 |
| Lianjiang | 2170 | 1152 | 351.4 |
Nearby places that are more than 1 °C1.8 °F warmer in December: Qionghai and Wanning; cooler: Nada, Zhanjiang, Wuzhishan and Lianjiang.
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 December?
In December the average high in Haikou is 22 °C (71 °F) and the average low is 18 °C (65 °F).
Does it rain a lot in Haikou in December?
On average about 49 mm (1.9 in) of precipitation falls in December; it ranks 9th of the 12 months.
Is December 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 December?
In the middle of December the day in Haikou lasts about 10.9 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Haikou in December?
The average relative humidity in December is about 80%. This is a long-term average for the whole day.
How cloudy is Haikou in December?
On average about 66% of the sky is covered by cloud in December. 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.