According to information from Son La Provincial Hydrometeorological Station, on the night of the 26th and day of February 27th, the weather throughout the province is generally cloudy, without rain; early morning fog appears in some places, cold at night and in the morning, light sunshine during the day, level 2 easterly wind.
Accordingly, Son La is currently affected by the southwest edge of the weakened continental high pressure ridge, combined with the southern edge of a low pressure trough with axis from 26-28 degrees North latitude.
This shape causes a significant temperature difference between day and night.
The common lowest temperature is 16-20 degrees Celsius, the highest is 21-32 degrees Celsius depending on the region. Moc Chau, Van Ho maintains the lowest temperature (about 16-21 degrees Celsius), while Muong La can reach 32 degrees Celsius during the day.
At night and early morning, many highland areas such as Moc Chau, Van Ho, Bac Yen maintain cold weather, accompanied by scattered fog, reducing visibility on mountain passes.
Air humidity is commonly from 50-98%, high in the early morning and at night, creating a clear feeling of humidity.
In Cao Bang, on the night of February 26 and the day of February 27, the weather will be cloudy, with light rain and light fog in some places at night and in the morning; clouds will decrease in the afternoon, and it will be sunny.
Lowest temperature 18-21 degrees C, highest 23-27 degrees C depending on the area. Light wind, high humidity, cold weather at night and morning.
According to Mr. Hoang Phuc Lam - Deputy Director of the National Center for Hydro-Meteorological Forecasting, since the 6th day of Lunar New Year until now, the North is generally cloudy, with fog in the early morning, accompanied by light rain and scattered drizzle.
This is a characteristic period of the transitional season, when humidity begins to appear on a large scale.
The main reason is that the cold air weakens and shifts to the east, while moisture from the sea continuously penetrates deep into the mainland.
Humidity in the air has been maintained at a high level for many consecutive days, causing floors, walls, and objects to easily "sweat", floors to be slippery, and clothes to be difficult to dry. The feeling of humidity lasts day and night, even if the temperature is not too low.
Experts predict that late February and March will be the peak of humidity in the North. Cold air will continue to operate but with weak intensity, mainly causing light rain and drizzle instead of widespread severe cold and frost like early winter.
Statistics show that from December 2025 to the first half of February 2026, there have been 8 cold spells, including 2 widespread severe cold spells.
However, the number of severe cold spells is less than the multi-year average; the average winter temperature is about 0.5-1 degree Celsius higher.
Forecast for the next 3 days (February 28 - March 3), the Son La area and many northern provinces will be cloudy, with light showers in some places at night and in the morning, sunny during the day.
The common lowest temperature is 20-22 degrees C, the highest is 30-32 degrees C. The humid state is likely to continue in the coming days, especially at night and early morning.
In Lao Cai, on the night of February 26th and 27th, it will be cloudy, with scattered light rain at night and in the morning; sunny skies in the afternoon. Cold weather in highlands and high mountains, deep cold at night and in the morning.
