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Balancing on the edges of a rice field with endless views. A trek through the valley of Sapa is definitely a must for the bucket list.
Lạng Sơn Weather in September
September in Lạng Sơn averages 31°C (88°F) during the day and 23°C (73°F) at night. Quite a bit of rainfall is typical this month, with around 168 mm (6.6 in) on average. An umbrella is a good idea.
Rainfall in Lạng Sơn in September
Based on our climate data of the past 30 years, about 14 days of rain are anticipated, with 168 mm (6.6 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Lạng Sơn in September
September in Lạng Sơn sees highs of 31°C (88°F) and lows of 23°C (73°F) overnight. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. At 23°C (73°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Lạng Sơn in September
The area enjoys a moderate level of sunlight, with around 183 hours. It's a good balance between sunny and cloudy days.If you prefer dry days with pleasant temperatures, February, March, October, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Lạng Sơn Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
31°C (88°F)
Chance of Rain
47%
Precipitation
168 mm (6.6 in)
Rainy days
14 days
Humidity
84%
Sunshine
183 hours
Percentage Sunshine
Lạng Sơn Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lạng Sơn - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lạng Sơn typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows typically ranging from 22°C (72°F) to 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Lạng Sơn in September
Browse day-by-day weather records for Lạng Sơn spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lạng Sơn historical weather extremes in September
Based on weather observations in Lạng Sơn between 1976 and 2025, these are the recorded extremes during September.
- Lạng Sơn recorded its highest September temperature of 39°C (102°F) on September 7, 1976.
- Lạng Sơn experienced its chilliest September day on September 27, 1997, reaching only 18°C (64°F).
- The lowest overnight temperature recorded in September was 15°C (59°F) (September 30, 1998).
Best Places in Vietnam in September
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Lạng Sơn in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Lạng Sơn in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Lạng Sơn 3-Day Forecast
More climate data for Lạng Sơn
Temperature Rainfall Sunshine Humidity
See the full Lạng Sơn climate overview or explore weather in Vietnam.
Popular in September
Where to go in September - average daytime high across popular destinations.
Ho Chi Minh City
32°C (90°F) Hanoi33°C (91°F) Nha Trang31°C (88°F) Hoi An32°C (90°F) Da Nang31°C (88°F) Vung Tau30°C (86°F) Duong Dong29°C (84°F) Da Lat26°C (79°F) Bucket list
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