Monthly Weather Summary

In November 2024, the high-pressure area from China periodically extended its ridge to cover upper Thailand and the South China Sea, causing cool weather in the northern and northeastern regions almost the whole month, especially at the end of the month when the rather intense high-pressure area extended down to the upper southern region which brought generally cool weather in upper Thailand with cold weather in many areas of the northeastern region. However, the high-pressure was weak at times, and temperature rose in several places. For rainfall, due to the passage of the westerly trough over the upper northern region on November 7 and 8 in the beginning and the middle of the month and the prevailing of the easterly and southeasterly winds over the lower northeastern, eastern, central and the upper southern regions in the middle of the month, unseasonable rain was observed in upper Thailand at that time. In southern region, under the influence of the monsoon trough that lay across the southern region at the beginning of the month, the northeast monsoon dominated the Gulf of Thailand and the southern region for almost the whole month, becoming stronger at the end of the month. Additionally, the low-pressure cell covered the eastern coast of Malaysia, the Strait of Malacca and the Malay Peninsula at the end of the month. These resulted in an abundance of rain in southern region at the beginning and the end of the month. In particular, the consecutive torrential rains at the end of the month caused significant flooding in many areas of the east coast. In November 2024, Thailand received an average total rainfall that was 57% higher than normal. The average temperature in Thailand was 0.9°C warmer than normal. Monthly rainfall was lower than normal in most regions i.e. northern region 1.9 mm (7%), northeastern region 13.0 mm (71%), eastern region 6.7 mm (14%) and southern region (west coast) 21.0 mm (11%). In contrast, the southern region (east coast) received 386.1 mm (113%) and the central received 3.1 mm (10%) higher than normal.