Haikou weather in January
In January, Haikou has an average high of 21 °C70 °F and an average low of 17 °C62 °F, with about 33 mm1.3 in of precipitation. January is the coldest month of the year and ranks 11th for precipitation.
How January compares with other months
Compared with December, January is 1.3 °C2.4 °F cooler on average and drier by 16 mm0.6 in. Compared with February, January is 1.2 °C2.2 °F cooler on average and wetter by 5 mm0.2 in. Daylight lasts about 11.0 hours around the middle of the month. Average relative humidity is 83% and the average cloud amount 70%.
Is January a good time to visit Haikou?
Yes — January 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 January
For Haikou in January, pack light layers — T-shirts plus a light sweater or jacket.
January in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Haikou | 2170 | 1762 | 331.3 |
| Xiuying | 2170 | 1661 | 301.2 |
| Wenchang | 2272 | 1661 | 351.4 |
| Qionghai | 2272 | 1865 | 381.5 |
| Nada | 2373 | 1356 | 251.0 |
| Zhanjiang | 1966 | 1560 | 421.7 |
| Wanning | 2272 | 1865 | 381.5 |
| Wuzhishan | 2474 | 1254 | 240.9 |
| Lianjiang | 2169 | 1151 | 441.7 |
Nearby places that are more than 1 °C1.8 °F warmer in January: Qionghai and Wanning; cooler: Zhanjiang 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 January?
In January the average high in Haikou is 21 °C (70 °F) and the average low is 17 °C (62 °F).
Does it rain a lot in Haikou in January?
On average about 33 mm (1.3 in) of precipitation falls in January; it ranks 11th of the 12 months.
Is January 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 January?
In the middle of January the day in Haikou lasts about 11.0 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Haikou in January?
The average relative humidity in January is about 83%. This is a long-term average for the whole day.
How cloudy is Haikou in January?
On average about 70% of the sky is covered by cloud in January. 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.