Rach Gia Weather in September

Rach Gia in September averages 31°C (88°F) during the day and 26°C (79°F) at night. This is the wettest month of the year.

Rainfall in Rach Gia in September

As part of the rainy season, Rach Gia sees around 20 days of rain in September, with an average of 345 mm (14 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours, often in the late afternoon.

Temperature in Rach Gia in September

Temperatures in Rach Gia in September top out at 31°C (88°F) and drop to 26°C (79°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With overnight lows of 26°C (79°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. On average, it features the lowest temperatures of the year but it is still a warm month.

Sunshine in Rach Gia in September

The area enjoys a balanced 163 hours of sunlight, ensuring it's neither too rainy nor too sunny.

September in Rach Gia can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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For a detailed overview over the year and the best time to visit Vietnam, check out our Rach Gia's climate page.

Rach Gia Temperature in September

Min Temperature 26°C (79°F)  

Max Temperature 31°C (88°F)  

Chance of Rain 65%  

Precipitation 345 mm (14 in)  

Rainy days 20 days  

Humidity 85%  

Sunshine 163 hours  

Percentage Sunshine  

Historical weather for Rach Gia in September

Browse day-by-day weather records for Rach Gia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Rach Gia historical weather extremes in September

Our historical data for Rach Gia spans 2002 to 2025, revealing these weather extremes.

• The warmest day in September was on September 7, 2017, with a maximum of 35°C (95°F).
• Rach Gia experienced its chilliest September day on September 10, 2011, reaching only 26°C (79°F).
• The coldest night in September in Rach Gia was on September 30, 2023, with a minimum of 22°C (72°F).

What to Wear in Rach Gia in September

Warm but pleasant conditions in Rach Gia in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Rach Gia in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Vietnam, check out our Rach Gia's climate page.

More climate data for Rach Gia

Temperature Rainfall Sunshine Humidity

See the full Rach Gia climate overview or explore weather in Vietnam.