What should I wear to Hainan in January?

You can wear short-sleeved shirts or slightly thinner long-sleeved shirts when you go to Hainan in January, because the temperature in Hainan is still 17 ~ 24℃ in January.

Hainan Island is located in the northern edge of the tropics, with a tropical monsoon climate. It has always been known as a "natural greenhouse". It has long summer without winter, with an average annual temperature of 22~27℃, a cumulative temperature of 82℃ greater than or equal to 1℃, and the coldest January temperature still reaches 17 ~ 24℃.

the annual illumination is 175 ~ 265 hours, the illumination rate is 5% ~ 6%, the light and temperature are sufficient, and the photosynthetic potential is high. Hainan Island, with its early spring, rapid temperature rise, large daily temperature difference, frost-free all year round and warm winter, is an ideal base for breeding seeds in South China.

Extended information:

Because Hainan has a tropical monsoon climate, under the control of the dry northeast monsoon, there is little precipitation in winter, and the temperature is the coolest moment in the whole year. Generally, the average humidity often falls between 5% and 75%, which is a dry and cool dry season.

The summer half year is the hottest half year of the year as the sun has started to warm up in the northern hemisphere. After the arrival of the southwest monsoon, it is easy to generate various stagnation fronts, such as tropical cyclones generated by the ocean and thunderstorms caused by thermal convection in the afternoon.

The rainfall increases obviously, and there are heavy rains from time to time. At this time, the average humidity generally falls between 75% and 1%, which makes people feel unbearable wet and sultry. This is the hot and humid rainy season.