Vietnam (Hanoi) · September
Low seasonVietnam · Asia
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 20° (68°)13– (55–)27 (81) | 22° (72°)14– (57–)28 (82) | 24° (75°)17– (63–)30 (86) | 28° (82°)20– (68–)33 (91) | 33° (91°)25– (77–)38 (100) | 35° (95°)29– (84–)38 (100) | 34° (93°)29– (84–)37 (99) | 33° (91°)27– (81–)37 (99) | 33° (91°)26– (79–)36 (97) | 30° (86°)23– (73–)34 (93) | 27° (81°)20– (68–)32 (90) | 22° (72°)15– (59–)28 (82) |
Ø night, range from coldest to warmest nightØ nightrange | 15° (59°)8– (46–)20 (68) | 17° (63°)10– (50–)22 (72) | 19° (66°)13– (55–)24 (75) | 22° (72°)16– (61–)26 (79) | 25° (77°)21– (70–)28 (82) | 27° (81°)24– (75–)29 (84) | 27° (81°)24– (75–)29 (84) | 26° (79°)24– (75–)28 (82) | 26° (79°)23– (73–)28 (82) | 23° (73°)18– (64–)26 (79) | 20° (68°)15– (59–)24 (75) | 16° (61°)10– (50–)21 (70) |
☀️Sunshine | 3h | 3h | 2h | 4h | 5h | 6h | 6h | 5h | 5h | 5h | 4h | 4h |
🌧Rain Days | 5d48mm (1.9") | 3d28mm (1.1") | 5d58mm (2.3") | 8d116mm (4.6") | 14d225mm (8.8") | 15d254mm (10.0") | 17d301mm (11.9") | 19d409mm (16.1") | 15d296mm (11.7") | 9d146mm (5.7") | 4d45mm (1.8") | 4d30mm (1.2") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
September in Vietnam (Hanoi) is generally manageable, but with 15 rain days it's not a reliably sunny month. Better conditions can be found in March, April, and November.
Daytime highs reach 33°C (91°F) with a daily average of 29°C (84°F) — nights stay warm at 26°C (79°F). Peaks reach around 36°C (97°F), the coldest nights around 23°C (73°F). With 5 sunshine hours per day and 15 rain days (296 mm (11.7 in)), this is one of the cloudier months.
An umbrella or waterproof jacket is essential. On rainy days, plan indoor activities like museums and markets.
High summer: hot and humid, with monsoon rain in the afternoon. Hanoi stays lively anyway — street food on plastic stools, bia hơi corners, water puppet theatre. Not for the heat-sensitive.
Packing list for Vietnam (Hanoi) in September
- Light summer clothes
- Sunscreen
- Sunglasses
- Rain jacket and waterproof shoes
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is September a good time to visit Vietnam (Hanoi)?
- September is not an optimal month for Vietnam (Hanoi) (Score: 65/100), but it is manageable. For better conditions, consider March, April, and November.
- How warm is it in Vietnam (Hanoi) in September?
- In September, Vietnam (Hanoi) sees daily highs of 33°C (91°F). Nights cool to 26°C (79°F), with a daily average of 29°C (84°F). Peaks reach around 36°C (97°F), the coldest nights around 23°C (73°F).
- How much rain falls in Vietnam (Hanoi) in September?
- In September, Vietnam (Hanoi) receives an average of 296 mm (11.7 in) of rain over 15 rain days. With frequent rain days, waterproof clothing is recommended.
- How many sunshine hours does Vietnam (Hanoi) get in September?
- Vietnam (Hanoi) averages 5 sunshine hours per day in September — above the annual average.
