Climate Insights for Lạng Sơn

The climate in Lạng Sơn is warm and mild. The average annual temperature is 22°C and approximately 1552mm of precipitation falls per year. Lạng Sơn receives a notable amount of rainfall throughout the year, including during its driest month. Lạng Sơn is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to 12°C.

Lạng Sơn sees moderate temperature variation throughout the year, ranging from 12°C to 32°C. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 12°C and an average of 15°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Lạng Sơn is a fairly wet location, receiving approximately 1552mm of precipitation annually, which averages out to around 129mm per month. The wettest month is August, averaging 280mm of rainfall. June and July also tend to see above-average precipitation. The driest month is December, with just 32mm. That's 248mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Lạng Sơn is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 16km/h in spring, 12km/h in summer, 13km/h in autumn.

It is currently spring in Lạng Sơn, which began on March 20, 2026. Lạng Sơn is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 32°C, while the coldest stretch bottoms out in January near 12°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Lạng Sơn is during February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 49mm per month. By contrast, July can be uncomfortably hot with highs reaching 32°C, while January is the coldest period with lows dropping to 12°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Lạng Sơn based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.