SeasonMapCon Dao (Con Son) weather in September
Vietnam
September in Con Dao: warm, soaked, with clean air — a gamble, with 26 rainy days.
#12 of 12 months in Con Dao · #1169 of 1383 destinations to visit in September · comfort 58/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Con Dao in September
No notes yet. Open Con Dao on the map to add the first one.
Con Dao climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Sea temperature | 29°C / 85°F | ♨️ bath-warm |
| Rainfall | 336 mm / 13.2 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9 h/day | |
| Daylight | 12.2 h | |
| Wind | 28 km/h / 17 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Con Dao in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in Vietnam, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Con Dao's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherCon Dao's weather peaks February–April, best around March.
Best weatherFair weatherToughest weather
What's on in Con Dao in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Sea turtle nesting
15 Apr – 31 Oct · usuallyBook earlyGreen turtles come ashore on Bay Canh and the smaller islets, most of them between May and October. The national park runs overnight ranger trips and hatchling releases, and the places on them are limited. Source ↗
- Season
Wet season
MonsoonRisk26 rainy days and about 336 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Con Dao — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Con Dao?
Con Dao in September — FAQ
- Is September a good time to visit Con Dao?
- September in Con Dao: warm, soaked, with clean air — a gamble, with 26 rainy days. It ranks #12 of 12 months for Con Dao on SeasonMap's comfort score (58/100).
- What is the weather like in Con Dao in September?
- In September, Con Dao averages a daily high of 27.7°C and a low of 26°C, with about 336.3 mm of rain over roughly 26 rainy days.
- What is the air quality in Con Dao in September?
- Con Dao has a mean US Air Quality Index of about 42 in September.
Other months in Con Dao
Compare Con Dao in September
Warmer or cooler than Con Dao in September
Similar destinations in Southeast Asia — September
Within 300 km: Ho Chi Minh City's Mid-Autumn Festival on 25 Sep.