January 13 weather: Cold, haze persists, light rain in South Thailand

Ryan TurnerPublished: January 13, 2026, 11:26 AM

61 2 minutes read

January 13 weather: Cold, haze persists, light rain in South Thailand | Thaiger — Morning fog at Doi Inthanon National Park in Chiang Mai | Photo via Bangkok Post/Panumet Tanraksa

Key insights from the news

Thailand is experiencing cool to cold weather, particularly in the North and Northeast, with morning fog and dry air conditions, as per the Thai Meteorological Department's forecast on January 13.
A weakening high-pressure system is causing a slight temperature rise of 1 to 2°C across most regions, but cool conditions remain, especially in mountainous areas.
Isolated light rain is expected in the lower South due to a moderate northeast monsoon, while wave heights in the Gulf and Andaman Sea are moderate, reaching 1 to 2 meters.
Temperatures in upper Thailand are projected to rise by 3 to 6°C by January 19, with persistent cool weather and potential light rain from a westerly trough between January 15 and 17.

Thailand continues to experience cool to cold weather in the North and Northeast, with morning fog and dry air conditions, according to the Thai Meteorological Department (TMD) forecast issued today, January 13.

A weakening high-pressure system over upper Thailand and the upper South is causing temperatures to rise slightly by 1 to 2 degrees Celsius (°C) in most regions. However, cool to cold weather remains likely in upper Thailand, particularly in mountainous areas.

A moderate northeast monsoon prevails over the Gulf of Thailand, the South, and the Andaman Sea, bringing isolated light rain in the lower South. Winds and waves in the Gulf and offshore in the Andaman Sea remain moderate, with wave heights of 1 to 2 metres, and higher in thunderstorm areas.

Regional forecast:

North Thailand: Cool to cold with morning fog. Temperatures are rising by 1 to 2°C. Minimum temperature 13 to 16°C; maximum temperature 28 to 32°C. Cold to very cold on mountain tops, with minimum temperatures of 4 to 10°C. Northeasterly winds 10 to 15 kilometres per hour (km/h).
Northeast Thailand: Cool to cold with light morning fog. Temperature increase of 1 to 2°C. Minimum temperature 12 to 16°C; maximum temperature 28 to 31°C. Cold to very cold on mountain tops, with minimum temperatures of 4 to 10°C. Northeasterly winds 10 to 20 km/h.
Central Thailand: Cool with morning fog. Temperature rising by 1 to 2°C. Minimum temperature 15 to 18°C; maximum temperature 30 to 32°C. Northeasterly winds 10 to 20 km/h.
East Thailand: Cool with light morning fog. Temperatures are rising by 1 to 2°C. Minimum temperature 17 to 22°C; maximum temperature 31 to 33°C. Northeasterly winds 15 to 35 km/h. Wave height about 1 metre, increasing to 1 to 2 metres offshore.
South Thailand (east coast):
- Upper part: Cool with light fog.
- Lower part: Isolated light rain.
- Minimum temperature 19 to 22°C; maximum temperature 30 to 33°C. Northeasterly winds 15 to 35 km/h. Wave height 1 to 2 metres.
South Thailand (west coast): Morning cool. Minimum temperature 22 to 24°C; maximum temperature 32 to 34°C. Northeasterly winds 15 to 35 km/h. Wave height around 1 metre, rising to 1 to 2 metres offshore.
Bangkok and surrounding areas: Cool with morning light fog. Temperatures are rising by 1 to 2°C. Minimum temperature 19 to 21°C; maximum temperature 30 to 32°C. Northeasterly winds 10 to 20 km/h.

Fine dust and haze accumulation in upper Thailand remains moderate to high. Poor atmospheric ventilation is contributing to increased buildup in several areas.

Until next Monday, January 19, Temperatures in upper Thailand are expected to rise by 3 to 6°C, with morning fog and occasional thick fog in some locations. Cool to cold weather is expected to persist in the North, Northeast and Central regions.

Between January 15 and 17, a westerly trough from Myanmar may bring light rain to upper northern and northeastern areas.

Minor earthquakes were detected, including magnitudes 3.5 and 3.6 in Myanmar, and 4.2, 3.8, and 4.2 in northern Sumatra, Indonesia, from January 12 to 13. None of the seismic activity had any effect on Thailand.