Thailand
18 August 2025 - 24 August 2025The monsoon trough lay across the northern and upper northeastern regions into an active low-pressure cell over the Gulf of Tonkin on the first day of the week, and then shifted northward to lie across Myanmar and upper Laos on the following day. Toward the end of the week, the monsoon trough returned to lie across the northern and upper northeastern regions, extending into Typhoon “KAJIKI (2513)” over the upper South China Sea on the last day. Moreover, the southwest monsoon prevailing over the Andaman Sea, Thailand, and the Gulf of Thailand strengthened during the second half of the week. In addition, a low-pressure cell covered upper Vietnam in the middle of the week. These conditions brought abundant rainfall to upper Thailand, mainly on the first day and during the latter half of the week. In the southern region, rainfall increased in the second half of the week, particularly along the west coast.
Meanwhile, Typhoon “KAJIKI (2513)” moved over the upper South China Sea at 10.00 p.m. LST on 24 Aug., with its center located east of Vinh, Vietnam.
Region Weather Summary
18 August 2025 - 24 August 2025Northern
Isolated to scattered rain in the first half of the week then increasing in rainfall to fairly widespread rain, with heavy rainfall in some areas at the middle and the end of the week and very heavy rainfall in some areas on 22 Aug. Flooding was reported in Chiang Mai and Phetchabun provinces from 22-24 Aug. Gusty wind occurred in Chiang Rai province from 21-22 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 111.1 mm at Kong Krailat, Sukhothai on 22 Aug. |
Northeastern
Fairly widespread rain except for isolated to scattered rain from 19-20 Aug. Heavy rainfall was observed in some areas throughout the week, with very heavy rainfall in some areas from 21-23 Aug. Flooding was reported in Chaiyaphum province from 20-24 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 125.0 mm at Phlapphla Chai, Buri Ram on 22 Aug. |
Central
Fairly widespread rain from 21-22 and 24 Aug. while isolated to scattered rain on the rest days. Heavy rainfall was observed in some areas almost the week with very heavy rainfall in some areas on 21 Aug. Flooding was reported in Phra Nakhon Si Ayutthaya province from 23-24 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 96.0 mm at Phak Hai and Bang Pa-in, Phra Nakhon Si Ayutthaya on 21 Aug. |
Eastern
Fairy widespread rain on the first day of the week and 21-22 Aug. while isolated to scattered rain on the rest days. Heavy rainfall was observed in some areas on 19 and 21-23 Aug. with very heavy rainfall in some areas from 21-22 Aug. Prolonged flooding was reported in Chanthaburi and Trat provinces.
| Max Rain | Max. Temp. | Min. Temp. |
| 110.8 mm at Ongkharak, Nakhon Nayok on 22 Aug. |
Southern (East Coast)
Scattered rain except for fairly widespread rain on 21 and 23 Aug. Heavy rainfall was observed in some areas almost the week with very heavy rainfall in some areas at the beginning of the week. Gusty Wind occurred in Phatthalung province on 19 Aug. and Songkhla province on 21 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 97.2 mm at Betong, Yala on 19 Aug. |
Southern (West Coast)
Isolated rain in the first half of the week then increasing in rainfall to fairly widespread rain with heavy rainfall in some areas. Flooding was reported in Phuket province on 22 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 64.4 mm at Thalang, Phuket on 22 Aug. |
Bangkok Metropolitan
Fairly widespread rain on the first day of the week and from 21-22 Aug. while isolated to scattered rain on the rest days. Heavy rainfall was observed in some areas on 18, 20 and 21 Aug. with very heavy rainfall in some areas on 21 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 49.9 mm at Ministry of Education, Khet Dusit on 21 Aug. (79.3 mm at Thetsaban 1 School, Mueang Samut Prakan, Samut Prakan on 21 Aug.) |
Announcement Date 25 August 2025 11:23
