Ninh Binh (Trang An) weather in September
September in Ninh Binh: sweltering, soaked, with poor air quality — not the time — 22 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#11 of 12 months in Ninh Binh · #1327 of 1413 destinations to visit in September · comfort 40/100 (tier F)
- Days
- 31°C
- Nights
- 25°C
- Wet days
- 22
- Sun
- 7.6 h
- Humidity
- 87%
- Daylight
- 12 h
Traveller notes on Ninh Binh in September
Other months in Ninh Binh
Ninh Binh's forum doesn't soften June: temperatures pushing toward 38C with brutal humidity are common enough that posters said it genuinely cuts into how much sightseeing you can pack into a day. Thunderstorms can roll through at any hour, usually brief downpours lasting a couple of hours rather than settling in for the whole day. The upside several posters mentioned is timing a visit around the local rice harvest, which adds a striking gold-and-green layer to the karst scenery that isn't there year-round.
Forum posters give genuinely mixed reports on December here: one visitor described the weather as glorious - dry and sunny nearly every day and pleasantly warm until the back half of the month, when nights turned much colder - while another had the opposite experience, with rain and fog obscuring the views. A recurring concern among posters is the famous rice paddies: their vivid emerald green fades to a muddy brown by December, well after the harvest, which changes the classic photogenic scenery many visitors expect from photos taken earlier in the year. Posters generally note that southern Vietnam runs warmer and drier than the north this time of year, positioning Ninh Binh's December visit as a genuine weather gamble rather than a guaranteed clear-and-green scene.
Add your own note from Ninh Binh's card on the map.
Ninh Binh climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Ninh Binh 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.
Peak crowdsNational Day, Summer break in Vietnam, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Ninh Binh'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 weatherNinh Binh's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Ninh Binh in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Holiday
National Day
30 Aug – 3 Sep · usuallyNational holidayCrowdedBook earlyNational Day on 2 September comes with at least two days off, usually joined to a weekend, and is a domestic travel peak. Flights and buses sell out, hotels fill with Vietnamese families, and streets are hung with red flags. Source ↗
- Season
Autumn window
25 Sep – 30 Nov · usuallyDry seasonCool, mostly dry and clear enough to see the top of the Mua Cave steps, with the summer domestic crowd gone and the paddy green again after the rains.
- Season
Wet season
MonsoonRisk22 rainy days and about 335 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 Ninh Binh — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Ninh Binh?
Ninh Binh in September — FAQ
- Is September a good time to visit Ninh Binh?
- September in Ninh Binh: sweltering, soaked, with poor air quality — not the time — 22 rainy days. It ranks #11 of 12 months for Ninh Binh on SeasonMap's comfort score (40/100).
- What is the weather like in Ninh Binh in September?
- In September, Ninh Binh averages a daily high of 31.2°C and a low of 25.1°C, with about 335.3 mm of rain over roughly 22 rainy days.
- What is the air quality in Ninh Binh in September?
- Ninh Binh has a mean US Air Quality Index of about 104 in September.
Within 300 km: Hanoi's Hanoi autumn around 25 Sep – 30 Nov, and Ha Long's Northern autumn around 25 Sep – 30 Nov.