Thailand
29 September 2025 - 05 October 2025The active monsoon trough lay across the northern and upper northeastern regions on the first day of the week. Additionally, the southwest monsoon which prevailed over the Andaman Sea, Thailand and the Gulf of Thailand was weakened since the middle of the week. Besides, the eastern and southeastern winds prevailed over the northeastern, eastern regions and the Gulf of Thailand during this period. These conditions brought rainfall across upper Thailand, particularly, abundant rainfall in the central and eastern regions almost the week with flooding reported in several areas. In the southern region, rainfall was observed throughout the week.
Meanwhile, Typhoon “BUALOI (2520)” made landfall in Quang Binh, upper Vietnam, and weakened into a severe tropical storm at 01:00 a.m. on 29 Sep. It then moved into Laos and further weakened into a tropical storm and tropical depression at 01:00 p.m. and 07:00 p.m. on the same day, respectively. Subsequently, it downgraded into an active low-pressure cell and moved to cover upper Myanmar and upper Laos on the following day. In addition, the severe tropical storm “MATMO (2521)” over the upper South China Sea reached Typhoon at the dawn of 5 Oct. and made landfall in the southern coast of Guangdong, China at the afternoon. After that, it moved into the Gulf of Tonkin at night on the same day.
Region Weather Summary
29 September 2025 - 05 October 2025Northern
Fairly widespread rain in the first half of the week then decreasing in rainfall and isolated to scattered rain. Heavy rainfall occurred in some areas throughout the week with very heavy rainfall in some areas on 29 Sep. and 3 Oct. Flooding continued in Phitsanulok, Phetchabun and Pichit provinces, and was additionally reported in Kamphaeng Phet province from 29-30 Sep., Mae Hong Son province from 29 Sep.–1 Oct., Uttaradit province from 30 Sep. – 5 Oct., Phare province on 1 Oct. and Chiang Mai province from 2-3 Oct.
| Max Rain | Max. Temp. | Min. Temp. |
| 168.0 mm at Tha Pla Agricultural Office, Tha Pla Uttaradit on 29 Sep. |
Northeastern
Fairly widespread rain with heavy to very heavy rainfall in several areas at the beginning of the week then decreasing in rainfall and isolated to scattered rain with heavy rainfall in some areas. Flooding occurred in Loei province from 29 Sep.–2 Oct., Maha Sarakham province from 28-29 Sep., Surin, Nong Bua Lam Phu, Nong Khai, Maha Sarakham and Nakhon Ratchasima provinces from 29 Sep.–1 Oct., Khon Kaen and Udon Thani province from 30 Sep. – 1 Oct., Chaiyaphum province from 3-5 Oct. and Ubon Ratchathani province on 5 Oct.
| Max Rain | Max. Temp. | Min. Temp. |
| 236.0 mm at Non Sang Self-Help Settlement Nong Bua Lam Phu on 29 Sep. |
Central
Fairly widespread rain except for isolated rain on 1, 2 and 5 Oct. Heavy rainfall occurred in some areas in the first half of the week and 4 Oct. Flooding continued in Phra Nakhon Si Ayutthaya, Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Ang Thong, and Suphan Buri provinces.
| Max Rain | Max. Temp. | Min. Temp. |
| 84.4 mm at Banrai Uthai Thani on 30 Sep. |
Eastern
Fairly widespread rain except for scattered rain on 29 Sep. and 1 Oct. with heavy rainfall in some areas throughout the week. Flooding continued in Chachoengsao provinces and was additionally reported in Sa Kaeo province on 29 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 88.9 mm at Klaeng Rayong on 5 Oct. |
Southern (East Coast)
Scattered to fairly widespread rain with heavy rainfall in some areas almost the week. Flooding occurred in Yala province on 4 Oct.
| Max Rain | Max. Temp. | Min. Temp. |
| 89.8 mm at Yala Agromet. Stn., Mueang Yala Yala on 3 Oct. |
Southern (West Coast)
Scattered to fairly widespread rain almost the week with heavy rainfall in some areas. Flooding occurred in Satun province on 29 Sep.
| Max Rain | Max. Temp. | Min. Temp. |
| 125.6 mm at Palian Trang on 3 Oct. |
Bangkok Metropolitan
Scattered to fairly widespread rain almost the week. Heavy rainfall occurred in some areas mainly in the second half of the week and very heavy rainfall in some areas on 4 Oct. Flooding continued in Nakhon Pathom province and Pathum Thani provinces.
| Max Rain | Max. Temp. | Min. Temp. |
| 90.2 mm at Wat Bang Bon School Khet Bang Bon on 4 Oct. (116.4 mm at Pathum Thani Agromet. Stn., Khlong Luang Pathum Thani on 4 Oct.) |
Announcement Date 06 October 2025 11:25