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.
Hanoi Weather in September
Hanoi in September sees very high daytime temperatures of 33°C (91°F) and nighttime lows of 25°C (77°F). As part of the rainy season, showers are frequent and often heavy. Budget around 247 mm (9.7 in) of rainfall for the month.
Rainfall in Hanoi in September
Hanoi is in the rainy season in September, with rain on around 14 days and an average of 247 mm (9.7 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Hanoi in September
In September, Hanoi sees very high temperatures, with highs of 33°C (91°F). Nights drop to around 25°C (77°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Hanoi in September
With about 162 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.September in Hanoi has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Hanoi Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
33°C (91°F)
Chance of Rain
46%
Precipitation
247 mm (9.7 in)
Rainy days
14 days
Humidity
87%
Sunshine
162 hours
Percentage Sunshine
Hanoi Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hanoi - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Hanoi typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 25°C (77°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 Hanoi in September
Browse day-by-day weather records for Hanoi spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hanoi historical weather extremes in September
Based on 50 years of weather observations in Hanoi between 1976 and 2026, these are the recorded extremes.
- On September 4, 1989, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 21°C (70°F), recorded on September 26, 1997.
- The lowest overnight temperature recorded in September was 17°C (63°F) (September 27, 1997).
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 Hanoi 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Hanoi in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Hanoi 3-Day Forecast
More climate data for Hanoi
Temperature Rainfall Sunshine Humidity
See the full Hanoi 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
Where to Go for Christmas: Sun, Value and Fewer Crowds
Where can you find warm Christmas weather without peak-season prices and huge crowds? Compare Marsa Alam, The Gambia, Vietnam, Agadir and Cap Skirring.
Peace, beauty and silence in Vietnam
Vedana is located along the shores of a secluded, peaceful and serene lagoon, surrounded in lushly forested peaks. This ensures an isolated appeal and stunning views across a vast immense lagoon.
Vietnam in February: North, Central or South?
Compare Vietnam's February weather in Hanoi, Da Nang, Nha Trang, Ho Chi Minh City and Phu Quoc to find the warmest, driest and sunniest region.