Thailand
21 July 2025 - 27 July 2025The strong southwest monsoon prevailed over the Andaman Sea, Thailand, and the Gulf of Thailand in the first half of the week before weakening. Additionally, the monsoon trough lay across upper northern Thailand and upper Laos during 22-23 Jul. and extended toward a low-pressure cell over upper Vietnam on 24 and 27 Jul. This low-pressure cell persisted over upper Vietnam for most of the week. Moreover, the tropical storm “WIPHA (2506)” which initially made landfall in southern China, moved into the Gulf of Tonkin and made landfall again over Thai Binh, upper Vietnam at 10:00 a.m. on 22 Jul. The storm subsequently weakened into a tropical depression and later into a strong low-pressure cell over Laos, before advancing to cover upper northern Thailand and upper Myanmar. These conditions brought rainfall across wide areas of upper Thailand almost the entire week, particularly in the northern region, where heavy to very heavy rainfall was observed in several areas, leading to prolonged flooding in various provinces. In the southern region, rainfall was mainly observed in the upper portion.
Region Weather Summary
21 July 2025 - 27 July 2025Northern
Fairly widespread rain almost the week, with heavy rainfall in some areas throughout the week, particularly from 22-23 Jul., when heavy to very heavy occurred in several areas. Prolonged flooding occurred in Chiang Rai and Nan provinces throughout the week, Chiang Mai province from 22-24 Jul., Mae Hong Son province from 23-24 Jul., Phayao and Lampang provinces from 23-26 Jul., Tak province from 23-27 Jul., Phrae province from 24-27 Jul. and Sukhothai province from 25-27 Jul. Gusty wind occurred in Phitsanulok province on 24 Jul.
| Max Rain | Max. Temp. | Min. Temp. |
| 184.0 mm at Doi Phuka National Park, Pua, Nan on 22 Jul. |
Northeastern
Fairly widespread rain with heavy rainfall in some areas almost the week. Flooding was reported in Loei province from 23-25 Jul. Gusty wind occurred in Loei province on 22 Jul.
| Max Rain | Max. Temp. | Min. Temp. |
| 85.0 mm at Nam Yuen, Ubon Ratchathani on 25 Jul. |
Central
Fairly widespread rain with heavy rainfall in some areas in the first half of the week and 26 Jul. whereas isolated to scattered rain on the rest days.
| Max Rain | Max. Temp. | Min. Temp. |
| 87.4 mm at Bangkok Bank Border Patrol Police School, Sangkhla Buri, Kanchanaburi on 23 Jul. |
Eastern
Fairly widespread rain almost the week, with heavy rainfall in some areas on 23, 26 and 27 Jul. and very heavy rainfall in some areas on 26 Jul. Gusty wind occurred in Chanthaburi province on 21 Jul.
| Max Rain | Max. Temp. | Min. Temp. |
| 110.2 mm at Pak Phli, Nakhon Nayok on 26 Jul. |
Southern (East Coast)
Isolated to scattered rain almost the week, with heavy rainfall in some areas of Narathiwat province on 24 Jul.
| Max Rain | Max. Temp. | Min. Temp. |
| 42.2 mm at Ra-ngae, Narathiwat on 24 Jul. |
Southern (West Coast)
Isolated rain almost the week except for scattered rain on the last day of the week.
| Max Rain | Max. Temp. | Min. Temp. |
| 29.4 mm at La-un, Ranong on 21 Jul. |
Bangkok Metropolitan
Scattered to fairly widespread rain in the first half of the week and 26 Jul. whereas scanty rain on the rest days.
| Max Rain | Max. Temp. | Min. Temp. |
| 28.9 mm at Wat Sutthi Sa-Ard School, Khet Khlong Sam Wa on 26 Jul. (34.2 mm at Nakhon Pathom Provincial Agricultural Extension Office, Mueang Nakhon Pathom, Nakhon Pathom on 26 Jul.) |
Announcement Date 28 July 2025 11:51
