Bà Nà weather in September

In September, Bà Nà sees average daytime highs of 30°C and overnight lows near 24°C, with 377 mm of rain across 26.8 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 29°C by the end. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Bà Nà's 10th-clearest and 11th-windiest month. For the whole year in context, see Bà Nà's year-round climate.

Daytime high
30°
5th warmest
Overnight low
24°
8th coldest
Rainfall
377 mm
26.8 wet days
Daylight
12 h 06 min
5:40 AM – 5:45 PM
Cloud cover
82%
10th clearest
Wind
4 km/h
11th windiest
Solar energy
4.88 kWh/m²
Travel score
2.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 29°C by the end.

A typical September day in Bà Nà reaches about 30°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, September runs about 2°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253023
262923
272923
282923
292923
302923

How September really feels in Bà Nà

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Bà Nà weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 18°15316.411.25.6
Feb25° / 19°8511.811.56.3
Mar28° / 21°11113.811.95.7
Apr30° / 23°14118.312.33.9
May32° / 24°28726.412.72.5
Jun33° / 25°21624.312.92.3
Jul32° / 25°24425.912.92.4
Aug32° / 25°27426.112.52.5
Sep30° / 24°37726.812.12.8
Oct28° / 22°43325.611.63.9
Nov26° / 21°46523.111.34.5
Dec23° / 19°32922.711.14.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21486
31486
41585
51585
61486
71486
81486
91486
101486
111486
121684
131684
141684
151783
161783
171882
181981
191981
202080
212179
222278
232278
242278
252278
262278
272278
282377
292377
302377

Chance of precipitation in September

Any precipitation

Bà Nà gets around 377 mm of rain over 26.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 89% and peaks near 92% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
191
291
391
491
592
692
792
892
992
1092
1192
1292
1392
1491
1591
1690
1790
1889
1989
2088
2188
2287
2387
2486
2586
2686
2785
2885
2985
3084

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
104159
204258
304357
404456
504555
604654
704753
804852
904951
1015049
1115247
1215346
1315544
1415643
1515841
1616039
1716138
1816336
1916435
2016633
2116732
2216930
2317029
2427028
2527226
2627325
2727424
2837522
2937621
3047620

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:38 AM to 5:41 AM, and sunset from 5:57 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:385:57
212.35:385:56
312.35:395:56
412.35:395:55
512.35:395:54
612.25:395:53
712.25:395:52
812.25:395:52
912.25:395:51
1012.25:395:50
1112.25:395:49
1212.15:395:48
1312.15:395:48
1412.15:405:47
1512.15:405:46
1612.15:405:45
1712.15:405:44
1812.15:405:43
1912.05:405:43
2012.05:405:42
2112.05:405:41
2212.05:405:40
2312.05:405:39
2412.05:405:38
2511.95:415:38
2611.95:415:37
2711.95:415:36
2811.95:415:35
2911.95:415:34
3011.95:415:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.88 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 6.08 kWh/m² in May across the year — September's 4.88 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.0Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.5Bright
274.4Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Hazard calendar for Bà Nà

In seasonPeak

In September, Bà Nà sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Bà Nà sits in the Pacific typhoon belt; the season peaks July–October.

Bà Nà's rainy season runs May–December, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Bà Nà?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.8
Sightseeing
8th-best month of the year
4.0
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Bà Nà.

What to pack for Bà Nà in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Bà Nà sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Bà Nà in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 30°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb23Refreshing
Mar24Refreshing
Apr25Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov27Warm
Dec25Warm

UV index in Bà Nà in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bà Nà peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 13UV 13Dec 15UV 7
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar11Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec6High

Air quality in Bà Nà in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Bà Nà is worst in March — around 49 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (July, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 2048 µg/m³Jul 2416 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb29Moderate
Mar49Poor
Apr42Poor
May28Moderate
Jun21Moderate
Jul16Moderate
Aug17Moderate
Sep20Moderate
Oct22Moderate
Nov21Moderate
Dec23Moderate
Location & terrain

Where is Bà Nà?

Bà Nà sits at 16.0°N, 108.0°E, 1,004 m above sea level, in Vietnam. The nearest listed city is Hải Châu, 18 km away.

Topography around Bà Nà

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bà Nà.

Within 3 km, the terrain around Bà Nà has very significant variations in elevation — a maximum elevation change of 1,343 m around an average of 780 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,481 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,013 m.

The land around Bà Nà is covered by trees (98%) within 3 km, trees (85%) within 16 km, and trees (59%) and water (32%) within 80 km.

3 km
1,343 m
16 km
1,481 m
80 km
2,013 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hải Châu 18 km · Đại Lộc 19 km · Hòa Cường 22 km · Cẩm Lệ 24 km · Thanh Khê 24 km · Da Nang 27 km · Sơn Trà 28 km · An Hải 28 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
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Bà Nà (15.9833°, 107.9833°, elevation 1,004 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).