Visit Sapa in Vietnam
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.
Long Hai Weather in September
Long Hai in September sees very high temperatures, with highs around 30°C (86°F) and overnight lows of 26°C (79°F). Rainfall is at its peak this month, around 281 mm (11 in) on average, so waterproofs are essential.
Rainfall in Long Hai in September
As part of the rainy season, Long Hai sees around 20 days of rain in September, with an average of 281 mm (11 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Long Hai in September
If you're visiting Long Hai in September, expect highs of 30°C (86°F) and overnight lows around 26°C (79°F). For most visitors, the main thing to prepare for is the heat during the day. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Long Hai in September
The area enjoys a balanced 187 hours of sunlight, ensuring it's neither too rainy nor too sunny.September in Long Hai has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Long Hai Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
66%
Precipitation
281 mm (11 in)
Rainy days
20 days
Humidity
86% *
Sunshine
187 hours *
Percentage Sunshine
*
* Data from: Vung Tau, Vietnam (16 KM, 10 Miles).
Long Hai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Long Hai - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Long Hai typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Historical weather records for Long Hai in September
Browse day-by-day weather records for Long Hai spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Long Hai historical weather extremes in September
Based on weather observations in Long Hai between 1987 and 2026, these are the recorded extremes during September.
- The hottest September day on record in Long Hai reached 35°C (95°F) (September 4, 2026).
- The coldest September day was on September 29, 1999, with a maximum of 25°C (77°F).
- Nighttime temperatures dropped to 19°C (66°F) on September 22, 2010, marking the coldest September night on record.
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 Long Hai 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. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Long Hai 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 -
Camping7/10 -
Outdoor sports7/10
Long Hai 3-Day Forecast
More climate data for Long Hai
Temperature Rainfall Sunshine Humidity
See the full Long Hai 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
Need travel inspiration? Check out our bucket list articles and be inspired.
Visit Sapa in Vietnam
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