Núi Thành weather in September

In September, Núi Thành sees average daytime highs of 29°C and overnight lows near 26°C, with 296 mm of rain across 23.4 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 15% of the time in September, and the air most often feels miserable.

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 Núi Thành's 11th-clearest and 9th-windiest month. For the whole year in context, see Núi Thành's year-round climate.

Daytime high
29°
5th warmest
Overnight low
26°
8th coldest
Rainfall
296 mm
23.4 wet days
Daylight
12 h 06 min
5:37 AM – 5:42 PM
Cloud cover
77%
11th clearest
Wind
10 km/h
9th windiest
Solar energy
5.16 kWh/m²
Travel score
3.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 28°C by the end.

A typical September day in Núi Thành reaches about 29°C in the afternoon and slips back to 26°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13027
23027
33027
43027
53026
63026
73026
83026
93026
103026
113026
123026
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282825
292825
302825

How September really feels in Núi Thành

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.

Núi Thành weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 21°16017.811.25.6
Feb24° / 21°9111.211.56.7
Mar26° / 23°868.911.97.0
Apr28° / 25°668.712.36.1
May30° / 26°9515.612.74.3
Jun31° / 27°9417.812.93.5
Jul31° / 27°10719.212.83.5
Aug31° / 27°13620.612.53.4
Sep29° / 26°29623.412.13.5
Oct27° / 25°41825.211.64.2
Nov26° / 24°45022.911.34.6
Dec24° / 22°36324.211.14.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 74%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12476
22476
32476
42278
52278
62278
72278
82278
92278
102278
112278
122278
132377
142476
152575
162575
172674
182674
192674
202872
212971
222971
233070
243169
253169
263169
273169
283268
293268
303367

Chance of precipitation in September

Any precipitation

Núi Thành gets around 296 mm of rain over 23.4 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 78% and peaks near 80% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
175
276
377
477
578
678
779
879
979
1080
1180
1280
1379
1479
1579
1679
1778
1878
1977
2077
2177
2277
2377
2477
2577
2677
2778
2878
2978
3078

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
10892
20892
30991
401090
501189
601288
701288
801387
901486
1001585
1101684
1201783
1301882
1402080
1502179
1602278
1702476
1802674
1902773
2002971
2103169
2203367
2303565
2403763
2503961
2604159
2714356
2814554
2914752
3014950

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 5:36 AM to 5:38 AM, and sunset from 5:54 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:365:54
212.35:365:53
312.35:365:53
412.35:365:52
512.25:365:51
612.25:365:50
712.25:365:50
812.25:375:49
912.25:375:48
1012.25:375:47
1112.25:375:46
1212.15:375:46
1312.15:375:45
1412.15:375:44
1512.15:375:43
1612.15:375:42
1712.15:375:41
1812.15:375:41
1912.05:375:40
2012.05:375:39
2112.05:375:38
2212.05:385:37
2312.05:385:37
2412.05:385:36
2512.05:385:35
2611.95:385:34
2711.95:385:33
2811.95:385:33
2911.95:385:32
3011.95:385:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.16 kWh/m².

For context, solar energy here swings from a low near 2.93 kWh/m² to a high of 6.39 kWh/m² in May across the year — September's 5.16 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
205.0Bright
214.9Bright
224.9Bright
234.9Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Núi Thành

In seasonPeak

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

Núi Thành sits in the Pacific typhoon belt; the season peaks July–October.

Núi Thành's monsoon runs September–December, when most of the year's rain falls.

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

Is September a good time to visit Núi Thành?

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

3.5
Sightseeing
9th-best month of the year
4.6
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Núi Thành.

What to pack for Núi Thành in September

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

In September, Núi Thành sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Núi Thành 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 22 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 Núi Thành in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Núi Thành peaks around August 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 highAug 10UV 13Dec 16UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec6High

Air quality in Núi Thành 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 Núi Thành is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (September, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1326 µg/m³Sep 1016 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May22Moderate
Jun20Moderate
Jul16Moderate
Aug16Moderate
Sep16Moderate
Oct18Moderate
Nov17Moderate
Dec20Moderate
Location & terrain

Where is Núi Thành?

Núi Thành sits at 15.4°N, 108.7°E, 8 m above sea level, in Vietnam. The nearest listed city is Tam Kỳ, 25 km away.

Topography around Núi Thành

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

Within 3 km, the terrain around Núi Thành has only modest variations in elevation — a maximum elevation change of 65 m around an average of 4 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,136 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,392 m.

The land around Núi Thành is covered by grassland (20%) and water (20%) within 3 km, water (39%) and trees (38%) within 16 km, and water (46%) and trees (43%) within 80 km.

3 km
65 m
16 km
1,136 m
80 km
2,392 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tam Kỳ 25 km · Mỹ Lại 37 km · Quảng Ngãi 37 km · Mỹ Khê 41 km · Lý Sơn 50 km · Đông Phú 54 km · Hoi An 61 km · Điện Bàn 67 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 Núi Thành (15.4319°, 108.6595°, elevation 8 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).