Thailand
September 19, 2022 - September 25, 2022The monsoon trough lay across the lower northern, upper central and northeastern parts on the first day of the week and shifted northward to lie over upper Laos and upper Vietnam on 20 Sep. Then it moved southward to lie over the lower northern and central parts toward a low pressure cell over the lower northeastern part. On the last day of the week, the monsoon trough moved southward to lie over the lower northern, central and eastern parts. In addition, the moderate southwest monsoon prevailed over the Andaman Sea, southern Thailand and the Gulf of Thailand throughout the week. These conditions caused abundant rainfall over upper Thailand almost the week with an increase in the amount and distribution of rainfall during the middle and the end of the week. The southern part received rainfall throughout the week especially along the west coast which had plentiful rainfall throughout the week.
Region Weather Summary
September 19, 2022 - September 25, 2022Northern
Fairly widespread rain except for scattered rain on the first day of the week. Heavy rainfall occurred in some areas throughout the week and very heavy rainfall in some areas on 23-24 Sep. Floods were reported in Kamphaeng Phet province on 22 Sep., Chiang Mai province on 23 and 25 Sep., Lamphun and Sukhothai provinces on 24 Sep., Lampang, Tak and Phetchabun provinces on 25 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 107.0 mm at Mueang Sukhothai on 23 Sep. |
Northeastern
Fairly widespread rain except for scattered rain on 20 Sep. Heavy to very heavy rainfall occurred in some areas throughout the week. Floods were reported in Buriram and Surin provinces on 20 Sep., Nakhon Ratchasima province on 20 and 23 Sep., Si Sa Ket province on 20 and 25 Sep., Mukdahan province on 23 Sep., Amnat Charoen province on 23-24 Sep., Yasothon province on 24 Sep., Loei, Khon Kaen and Chaiyaphum provinces on 25 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 188.5 mm at Don Tan Mukdahan on 23 Sep. |
Central
Fairly widespread rain with heavy rainfall in some areas almost the week and very heavy rainfall in some areas during the middle and the end of the week.
| Max Rain | Max. Temp. | Min. Temp. |
| 140.7 mm at Amphawa Samut Songkhram on 21 Sep. |
Eastern
Fairly widespread rain with heavy to very heavy rainfall in some areas throughout the week. Floods were reported in Sa Kaeo province on 20 Sep., Rayong province on 24 Sep. and Prachin Buri province on 25 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 140.6 mm at Mueang Prachinburi on 25 Sep. |
Southern (East Coast)
Scattered rain with heavy rainfall in some areas almost the week. Gusty wind occurred in Nakhon Si Thammarat province on 20 Sep. and Narathiwat province on 21 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 86.0 mm at Nong Phlub Agromet. Stn., Hua Hin Prachuap Khiri Khan on 24 Sep. |
Southern (West Coast)
Fairly widespread rain with heavy rainfall in some areas throughout the week.
| Max Rain | Max. Temp. | Min. Temp. |
| 68.0 mm at Koh Libong Wildlife Sanctuary Trang on 23 Sep. |
Bangkok Metropolitan
Fairly widespread rain with heavy to very heavy rainfall in some areas except for isolated light rain on the first day of the week. Flooding continued from the last week in Pathum Thani province with report of flooding in Samut Prakan province on 23 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 95.1 mm at Rattanakosin Somphot School Khet Bang Khun Thian on 21 Sep. (97.1 mm at Thetsaban 1 school, Mueang Samut Prakan on 23 Sep.) |
Announcement Date 19 September 2022 15:46