What to wear in May

Dear, hello, it is recommended that you pay more attention to the weather forecast before departure, and determine it according to the actual situation! <br/>The climate in Qamdo is characterized by coldness. Due to the influence of factors such as north-south parallel canyons and mid-low latitude geographical location, it has the characteristics of obvious vertical distribution and large regional differences. Sufficient sunshine, strong solar radiation; large daily temperature difference, small annual temperature difference; concentrated rainfall, uneven seasonal distribution, large evaporation, low relative humidity. The north-south vertical arrangement of mountains and rivers in Qamdo area is conducive to the north-south transport of warm and humid air flow, the canyon height difference is huge, and the vertical climate change is greater than the horizontal change. <br/> 1. The air is clean, the sunshine is long and the radiation is strong. The average altitude of Qamdo is over 3,500 meters, the air is thin, and the annual average air pressure and oxygen content per cubic air are only 2/3 of those in the plains. The content of dust and impurities in water and air is small, and the intensity of solar radiation is high. The average annual sunshine hours in various places are between 2180 and 2700 hours, which is 30[%] higher than that of the Yangtze River Basin at the same latitude in eastern my country. Basu is located in the rain shadow area of ​​the leeward slope of Nyainqentanglha Mountain and Boshula Ridge. The climate is dry, little rain, and the annual sunshine is 2697 hours. <br/>The total solar radiation in Changdu area is between 5800-7000×106J/㎡, and the total monthly radiation is sufficient throughout the year. The total radiation in May is the highest, and the total monthly radiation is 607-754×106J/ ㎡; the total radiation amount in December is the lowest, 339～435×106J/㎡. <br/> 2. The daily temperature difference is large, the annual temperature difference is small, and the temperature is low. The annual average temperature in Qamdo area is 2.4℃～12.6℃. The climate distribution restricted by the terrain structure and atmospheric circulation characteristics is that the temperature in the Sanjiang Valley is the highest, and gradually decreases from southeast to northwest. January is the coldest month, except for Basu, Chaya and Yanjing, where the temperature is above 0°C, other areas are below 0°C; the warmest month, except for Bianba and Gongjue, which is generally in August, other areas appear In July, the temperature is between 11.6°C and 19.6°C. The river valleys of Basu, Chaya, and Yanjing are close to 20°C, while Bangda, which is at a higher altitude, is less than 12°C, with a difference of 8°C. The average temperature in Qamdo is 7.6°C. Due to the influence of latitude, terrain, water and land distribution, weather and other factors, the daily temperature in Qamdo area varies greatly, and the daily temperature difference is much larger than that in the eastern area at the same latitude throughout the year. Gyantse (16.1°C) is comparable. In winter, the daily temperature range is 14.2°C to 20°C, and in summer it is 11.3°C to 16.2°C, with a difference of 2.9°C to 3.8°C. <br/>3. The rainfall is concentrated and the seasonal distribution is uneven. The precipitation from May to September is between 182.3 and 538.2 mm, accounting for 77.9 [%] to 95.8 [%] of the annual rainfall. The precipitation from October to May of the following year is 19.6-102.6 mm, accounting for only 4.3[%]-21.2[%] of the annual precipitation. Qamdo has high mountains and deep valleys. Affected by topographical conditions and atmospheric circulation, there are distinct dry and rainy seasons. The rainy season has concentrated precipitation, which is mild and humid. The dry season has little precipitation and is severely cold and dry. <br/> 4. Large evaporation and low relative humidity. The annual evaporation of each place is between 1325.3 and 2617.2 mm, and Basu, located in the Nu River Valley, has the highest annual evaporation of 2617.2 mm, which is more than 10 times the annual precipitation. Dingqing and Leiwuqi, which are located in the northern section of the Lancang River Basin, are the least, with a thickness of 1325.3-1450.8 mm. The evaporation also has obvious seasonal distribution characteristics. The evaporation in May before the rainy season is the highest, generally 180-247 mm, and the highest evaporation in Baxiu is concentrated in June, reaching 326.7 mm. The period with the least evaporation in the whole region is generally in December, which is 50-70 mm. The relative humidity is low from October to April of the following year, less than 50[%] in most areas, and this period is generally the dry season. When the southwest monsoon begins to affect the Sanjiang River Basin from south to north in March and April, the relative humidity increases month by month. After entering June except Basu, the relative humidity in all places is above 60[%]. The low centers of annual average relative humidity are 40[%] in Basu in the Nujiang River Valley and 47[%] in the salt wells in the Lancang River Valley. The high centers of relative humidity are Leiwuqi and Bangda Grasslands. The annual average relative humidity reaches 58[%]~60[%], and the maximum is above 70[%] from July to September.