Monthly Weather Summary

         In April 2025, the heat low-pressure cell periodically covered upper Thailand, accompanied by the prevailing of the southerly winds for nearly the entire month. These resulted in hot weather in most of areas and very hot in some place of northern, northeastern and central parts. However, the high-pressure areas extended from China to northeastern Thailand and the South China Sea for few time. At the end of the month, the confluence of the southeasterly and southwesterly winds over northern and upper northeastern Thailand due to the passage of westerly trough moved through the mentioned areas. These caused periodical rainfall in upper Thailand with gusty wind in several areas. In the southern part, the easterly and southeasterly winds that dominated the Gulf of Thailand and southern part for nearly the entire month in addition the passage of easterly trough moved through the mentioned areas in the beginning of the month cause of rainfall almost the month. Monthly rainfall was above normal in almost parts i.e. northern part 37.2 mm (53%), central part 33.9 mm (44%), southern part (east coast) 41.4 mm (52%) and southern part (west coast) 58.8 mm (36%), except for northeastern and eastern parts that received below normal 21.6 mm (25%) and 0.4 mm (0%), respectively. The average total rainfall over Thailand in this month was higher than normal 21.3 mm (32%). For more details were as follow.