Nha Trang Weather in September
September in Nha Trang brings very high temperatures, with highs of 31°C (88°F) and nights dropping to 26°C (79°F). The rainy season is in full swing this month, so frequent downpours are part of the picture.
Rainfall in Nha Trang in September
As part of the rainy season, Nha Trang sees around 20 days of rain in September, with an average of 218 mm (8.6 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Nha Trang in September
Daytime temperatures in Nha Trang reach 31°C (88°F) in September, dropping to 26°C (79°F) at night. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Nha Trang in September
The city usually sees around 203 hours of sunlight, indicating many sunny days despite it being the rainy season.
Average water temperature in September
At 29°C (84°F), the water is very warm — more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Nha Trang. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Nha Trang's climate page.
Nha Trang Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Water Temperature
29°C (84°F)
Chance of Rain
67%
Precipitation
218 mm (8.6 in)
Rainy days
20 days
Humidity
82%
Sunshine
203 hours
Percentage Sunshine
55%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Nha Trang typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 26°C (79°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 for Nha Trang in September
Browse day-by-day weather records for Nha Trang spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nha Trang historical weather extremes in September
Based on 32 years of weather observations in Nha Trang between 1993 and 2025, these are the recorded extremes.
- The hottest September day on record in Nha Trang reached 38°C (100°F) (September 5, 2019).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 21, 1997.
- The lowest overnight temperature recorded in September was 23°C (73°F) (September 15, 2022).
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 Nha Trang 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. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Nha Trang 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 Nha Trang's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Nha Trang climate overview or explore weather in Vietnam.
