Bản Na Hỷ in Fall
In fall (September, October and November), Bản Na Hỷ sees average daytime highs around 26°C and overnight lows near 19°C, with 384 mm of rain over about 45 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 29°C in early September to 22°C by late November. The sky is clear or mostly clear about 19% of the time across fall, and the air most often feels oppressive.
Fall is Bản Na Hỷ's 2nd-best season to visit on our travel score. For the whole year in context, see Bản Na Hỷ's year-round climate.
- Avg daytime high
- 26°C
- 3rd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 384 mm
- 45 wet days
- Avg wind
- 4 km/h
- Travel score
- 5.7
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Bản Na Hỷ in Fall
Over the season highs ease from about 29°C in early September to 22°C by late November.
A typical fall day in Bản Na Hỷ reaches about 26°C and drops to 19°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Bản Na Hỷ
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Bản Na Hỷ weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 12° | 21 | 5 | 11 | 6.8 |
| Feb | 22° / 14° | 17 | 5.2 | 11.3 | 7.2 |
| Mar | 25° / 16° | 42 | 9.1 | 11.9 | 6.9 |
| Apr | 28° / 19° | 68 | 14.8 | 12.4 | 5.1 |
| May | 30° / 22° | 155 | 22.2 | 12.9 | 3.4 |
| Jun | 31° / 23° | 158 | 22.3 | 13.2 | 3.0 |
| Jul | 30° / 23° | 233 | 24.4 | 13.1 | 3.1 |
| Aug | 29° / 22° | 298 | 26.8 | 12.7 | 3.2 |
| Sep | 28° / 21° | 231 | 22.6 | 12.1 | 4.1 |
| Oct | 26° / 19° | 118 | 15.4 | 11.5 | 5.8 |
| Nov | 23° / 16° | 35 | 6.9 | 11.1 | 7.2 |
| Dec | 20° / 13° | 21 | 4.9 | 10.8 | 7.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 19% of the time across fall.
Chance of precipitation in Fall
Bản Na Hỷ gets around 384 mm of rain over 45 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 4 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.8 kWh/m².
Hazard calendar for Bản Na Hỷ
In fall, Bản Na Hỷ overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Bản Na Hỷ's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Bản Na Hỷ?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Bản Na Hỷ for sightseeing.
What to pack for Bản Na Hỷ in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Bản Na Hỷ sees daytime highs around 26°C and nights near 19°C. Pack light clothes and rain gear. About 45 days see rain.
UV index in Bản Na Hỷ in Fall
Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bản Na Hỷ peaks around August 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 11 | 9 | 9 | 14 | 13 | 14 | 11 | 10 | 8 | 6 |
| Level | Very high | Very high | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 11 | Extreme |
| Apr | 9 | Very high |
| May | 9 | Very high |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 14 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 6 | High |
Air quality in Bản Na Hỷ in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Bản Na Hỷ is worst in April — around 162 µg/m³ PM2.5 (very unhealthy), about 19.2× the cleanest month (August, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 30 | 83 | 162 | 34 | 28 | 10 | 8 | 11 | 15 | 15 | 19 |
| Level | Moderate | Moderate | Unhealthy | Very unhealthy | Moderate | Moderate | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 30 | Moderate |
| Mar | 83 | Unhealthy |
| Apr | 162 | Very unhealthy |
| May | 34 | Moderate |
| Jun | 28 | Moderate |
| Jul | 10 | Good |
| Aug | 8 | Good |
| Sep | 11 | Good |
| Oct | 15 | Moderate |
| Nov | 15 | Moderate |
| Dec | 19 | Moderate |
Where is Bản Na Hỷ?
Bản Na Hỷ sits at 19.6°N, 104.5°E, 303 m above sea level, in Vietnam. The nearest listed city is Thái Hòa, 85 km away.
Topography around Bản Na Hỷ
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bản Na Hỷ.
Within 3 km, the terrain around Bản Na Hỷ has large variations in elevation — a maximum elevation change of 1,158 m around an average of 625 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,938 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,684 m.
The land around Bản Na Hỷ is covered by trees (94%) within 3 km, trees (89%) within 16 km, and trees (91%) within 80 km.
Vietnam travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / F
- 220 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,066
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2011
- Road deaths
- 30.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 500
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bản Na Hỷ (19.5636°, 104.5346°, elevation 303 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.