Daily Weather Forecast
20 January 2026Announcement Date 20 January 2026
Forecast Additional Video Formats
General Situation
20 Jan 2026
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Weather Map
The weak high-pressure system covering upper Thailand. Morning cool with fog and dense fog in some places over the North. Cool to cold weather is likely in the North and the Northeast regions. At the same time, the westerly winds from Myanmar move through the upper North and the upper Laos while the southeasterly wind prevails over the East with isolated rains. People should keep healthy due changeable weather and beware fire due to dry air.
All transports take more cautions with poor visibility.
The weak northeast monsoon prevails over the Gulf and the South with isolated thundershowers in the South. The wind and waves in the Gulf and the Andaman Sea are likely about 1 meter high. All ships should proceed with caution.
In addition, the another moderate high-pressure system from China will extend to upper Thailand, the upper South and the South China Sea with a decrease in temperate and strong wind. A decrease in temperate by 2 – 4 °C is likely in the Northeast and the East regions while a decrease in temperate by 1 – 3 °C is likely in the rest regions except for the lower South regions.
Bangkok Metropolis and Vicinity Forecast
06:00 Today - 06:00 TomorrowMorning fog. Isolated rain. Minimum temperature 23-25 °C. Maximum temperature 33-35 °C. Southeasterly winds 10-15 km/hr.
Announcement Date 20 January 2026
Weather Province Additional
7 days Weather Forecast
During 20 – 26 January 2026Forecast
During 21 – 26 Jan 2026, the another moderate high-pressure system from China will extend to upper Thailand, the upper South and the South China Sea with a decrease in temperate and strong wind. A decrease in temperate by 2 – 4 °C is likely in the Northeast and the East regions while a decrease in temperate by 1 – 3 °C is likely in the rest regions except for the lower South regions. For the South, during 21 – 26 Jan 2026, the moderate northeast monsoon prevailing over the Gulf, the South and the Andaman Sea will strengthen with isolated thundershowers in the South. The strengthening wind force the waves in the lower Gulf up to about 2 meters high, 1-2 meters high in the upper Gulf and the Andaman Sea offshore and above 2 meters high in thundershowers.
Caution
During 21 – 26 Jan 2026, People in the upper Thailand and the upper South should keep healthy due to cool to cold weather. All ships in the Gulf and the Andaman Sea should proceed with caution and keep off thundershowers.
Announcement Date 20 Jan 2026
7 day Weather Summary
12 January 2025 - 18 January 2025Forecast
The rather active high-pressure area from China that extended its ridge to cover upper Thailand and the upper southern weakened, and during the second half of the week it was weak and covering upper Thailand. In addition, the westerly wind from Myanmar moved to cover upper northern region and upper Laos during 15-17 Jan., while the southeasterly wind prevailed over lower central and eastern regions in the second half of the week. These conditions caused generally cool to cold weather over Thailand in the first half of the week. After that, temperature increased relatively over most areas but cold weather remained in the upper part of the northern and northeastern regions in the second half of the week. Rainfall was observed in some areas of the central and eastern regions at the end of the week. In the southern region, the moderate northeast monsoon prevailed over the Gulf of Thailand, the southern region and the Andaman Sea in the first half of the week before weakening, causing rainfall in some areas.
Announcement Date 19 Jan 2026
Previous
Monthly Weather Forecast
November 2022Forecast
Upper Thailand will be more cold especially the northern and northeastern regions with some thunderstorms on certain days. For the mountain tops, mountain peaks, and mountain ranges, the weather is generally cold. This is because The high pressure area from China will extend to cover the North and Northeast periodically. It will be mostly moderate power. the southern part It continues to rain heavily. especially the east coast from Chumphon down There are still thunderstorms in 60 - 80 percent of the area with heavy rain in many areas and very heavy in some places.This will cause flash floods and flash floods, as well as overflowing riverbanks in some places. For wind waves in the Gulf of Thailand will be strong. In some periods, there will be waves 2 - 4 meters high, while the Andaman Sea will have 1-2 meters high because the northeast monsoon still prevails over the Gulf of Thailand and the South. It will have strength from time to time. In addition, there will be a monsoon trough that lies across the central South in some periods. In addition, in some periods there will be an active low pressure cell moving closer. and has a high chance of moving through the southern region
Caution
In summary, this month, the total rainfall in the northern and northeastern regions is expected to be 10% less than normal, and the central and eastern regions are close to normal. The southern region is 10 percent above normal, while the average landscape is still slightly above normal.
Announcement Date 01 November 2022