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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Long Hai's climate page.
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
*
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 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 2025, these are the recorded extremes during September.
- The hottest September day on record in Long Hai reached 35°C (95°F) (September 25, 2019).
- 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 →
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Long Hai's climate page.
Temperature Rainfall Sunshine Humidity
See the full Long Hai climate overview or explore weather in Vietnam.
