Weekly Weather Summary
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January 5, 2018 - January 11, 2018Max. Rainfall AmountMax. Temperature
Thailand
The moderate high pressure area covered upper Thailand and the South China Sea on the first day of the period and later weakened. During late of the period, another active high pressure area from China respectively extended its ridge to cover northeastern Thailand and upper Thailand. In addition, the westerly trough from Myanmar moved to cover upper northern part of Thailand on 5 and 6 Jan. and the easterly wind prevailed over upper Thailand on 7 Jan. These conditions caused generally cool weather on the first day of the period and late period with cold weather in some areas of the northeastern parts during late period. Unusual rainfall occurred in upper Thailand almost the period with heavy to very heavy rainfall in some areas during late period. With the prevailing of the northeast monsoon over the Gulf of Thailand and southern part which strengthen during the second half of the period, southern Thailand experienced cool weather in some areas with abundant rainfall almost the period mainly along the east coast.    
Northern Part
Generally cool weather during early and late period. Cool weather nearly the whole areas on the rest days. Cool to cold weather in the mountainous areas and mountain tops. Isolated rain except for scattered rain on 6 and 10 Jan. 30.0 mm at Bo Kluae Nan on 7 Jan.  16.0 º C at Thung Chang Nan on 11 Jan. (8.0 º C at Doi Inthanon Chiang Mai on 6,8,11 Jan.)  
Northeastern Part
Generally cool weather on the first day of the period and late period with cold weather in some areas during late period. Cool weather in several areas on the rest days. Cool to cold weather in the mountainous areas and mountain tops. Isolated rain nearly the whole period with heavy rainfall in some areas on 6 Jan. 52.2 mm at Phra Yuen Khon Kaen on 6 Jan.  13.4 º C at Nakhon Phanom Agromet Stn. Nakhon Phanom on 11 Jan. (9.0 º C at Phu Rua Nation Park Loei on 5,11 Jan.)  
Central Part
Cool weather in several areas except for generally cool weather on the first and the last days of the period. Isolated to scattered rain on 7, 9 and 10 Jan. with heavy to very heavy rainfall in some areas on 9 Jan. 94.2 mm at Chai Badan Lob Buri on 9 Jan.  19.2 º C at Tha Ruea Phra Nakhon Si Ayutthaya on 11 Jan. 
Eastern Part
Cool weather in some areas except for generally cool weather on the last day of the period. Isolated rain except for fairly widespread to widespread rain with heavy to very heavy rainfall on 6, 9and 10 Jan. 115.0 mm at Kog Soong Sa Kaew on 9 Jan.  19.3 º C at Sanam Chai Khet Chachoengsao on 11 Jan. 
Southern Part (East Coast)
Cool weather in some areas. Isolated to scattered rain with heavy rainfall in some areas except for fairy widespread to widespread rain with heavy to very heavy rainfall in some areas mainly on the last day of the period. 180.3 mm at Koa I Rong Narathiwat on 11 Jan.  20.3 º C at Nong Plub Agromet. Stn. Prachuap Khiri Khan on 6 Jan. 
Southern Part (West Coast)
Cool weather in some areas. Fairy widespread to widespread rain with heavy rainfall in some areas except for isolated to scattered rain on 5, 9 and 10 Jan. 39.0 mm at Ko Lanta Krabi on 6 Jan.  19.0 º C at Nuea Khlong Krabi on 9 Jan. 
Metropolitan
Cool weather in some areas except for cool weather nearly the whole areas on the last day of the period. Scattered light rain on 6 Jan. and widespread rain with heavy rainfall in several areas on 9 and 10 Jan. especially very heavy rainfall in several areas of Bangkok on 9 Jan. 145.2 mm at Wat Sub Samosorn School. Khet Nong Chok on 9 Jan. Vicinity 86.8 mm at Samut Prakan Agromet Stn. Samut Prakan on 10 Jan.   21.1 º C at Bangkok Airport Khet Don Mueang on 11 Jan. Vicinity (20.5 º C at Khlong Luang Pathumthani on 11 Jan.)  
Weekly total Rainfall and Weekly mean minimum temperature Map
Issued Date January 12, 2018