Thailand
03 August 2026 - 09 August 2026The monsoon trough lay across the upper northern Thailand and upper Laos almost the week, extending into the low-pressure cell over the coast of upper Vietnam in the first half of the week before extending into a low-pressure area in the Gulf of Tonkin in the latter half. Additionally, the southwest monsoon prevailing over the Andaman Sea, Thailand and the Gulf of Thailand was rather active almost the week. These conditions caused rainfall in upper Thailand almost the week mainly in the northern and northeastern regions with flooding in some areas. In the southern region, rainfall was observed almost the week, mainly along the west coast.
Region Weather Summary
03 August 2026 - 09 August 2026Northern
Scattered to fairly widespread rain with heavy rainfall in some areas almost the week and very heavy rainfall in some areas on 7 and 8 Aug. Flooding was reported in Phitsanulok province during 3-4 Aug , Phetchabun province during 3–6 Aug., Nan province on 6-9 Aug., Chiang Rai province 7-8 Aug., Mae Hong Son province during 7-9 Aug. , and Chiang Mai provinces during 8 Aug. Landslide was reported in Mae Hong Son provinces on 9 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 135.0 mm at Song Khwae Nan on 6 Aug. |
Northeastern
Fairly widespread rain with heavy rainfall in some areas throughout the week and very heavy rainfall in some areas on 3 , 6 , 8 and 9 Aug. Flooding was reported in Nong Khai province during 7-9 Aug. and Nakhon Phanom province on 9 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 250.0 mm at Ban Phaeng Nakhon Phanom on 9 Aug. |
Central
Scattered to fairly widespread rain except for isolated to scattered rain on 4 and 9 Aug. with heavy rainfall in some areas on 3 , 5 , 6 and 8 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 82.0 mm at Sub Lanka Forest Garden, Lam Sonthi Lop Buri on 5 Aug. |
Eastern
Scattered rain at the beginning of the week then increasing in rainfall to fairly widespread rain with heavy rainfall in some areas almost the week and very heavy rainfall in some areas on 3 , 5 and 6 Aug.
| Max Rain | Max. Temp. | Min. Temp. |
| 94.8 mm at Mueang Trat Trat on 5 Aug. |
Southern (East Coast)
Scattered rain with heavy rainfall in some areas almost the week.
| Max Rain | Max. Temp. | Min. Temp. |
| 72.4 mm at Yaring Pattani on 4 Aug. |
Southern (West Coast)
Fairly widespread rain except for scattered rain on 8 Aug. with heavy rainfall in some areas at the beginning and the middle of the week.
| Max Rain | Max. Temp. | Min. Temp. |
| 173.4 mm at Thai Mueang Settlement, Thai Mueang Phang-nga on 4 Aug. |
Bangkok Metropolitan
Scattered to fairly widespread rain except for isolated rain on the first day of the week with heavy rainfall in some areas on 6 Aug. while isolated rain on the rest days.
| Max Rain | Max. Temp. | Min. Temp. |
| 41.7 mm at Ministry of Education Khet Dusit on 6 Aug. (68.4 mm at Nakhon Pathom Provincial Agricultural Extension Office, Mueang Nakhon Pathom Nakhon Pathom on 8 Aug.) |
Announcement Date 10 August 2026 11:27