Quảng Ngãi weather in September

In September, Quảng Ngãi sees average daytime highs of 31°C and overnight lows near 25°C, with 286 mm of rain across 24.9 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 32°C in the first days to 30°C by the end. The sky is clear or mostly clear about 8% 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 Quảng Ngãi's 11th-clearest and 11th-windiest month. For the whole year in context, see Quảng Ngãi's year-round climate.

Daytime high
31°
5th warmest
Overnight low
25°
8th coldest
Rainfall
286 mm
24.9 wet days
Daylight
12 h 06 min
5:37 AM – 5:42 PM
Cloud cover
81%
11th clearest
Wind
5 km/h
11th windiest
Solar energy
5.01 kWh/m²
Travel score
2.7
out of 10

Quảng Ngãi is provincial city of Vietnam.

Density
1,739/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 32°C in the first days to 30°C by the end.

A typical September day in Quảng Ngãi reaches about 31°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°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)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143125
153125
163125
173125
183125
193125
203125
213125
223124
233124
243124
253124
263024
273024
283024
293024
303024

How September really feels in Quảng Ngãi

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
10 feel dangerously hot (≥ 39°C)
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.

Quảng Ngãi 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
Jan25° / 20°12816.211.25.7
Feb26° / 20°7110.911.56.4
Mar28° / 22°8410.511.95.9
Apr31° / 24°8012.212.34.2
May33° / 26°14218.812.72.7
Jun34° / 27°10517.612.92.4
Jul34° / 26°13218.412.82.5
Aug33° / 26°15720.512.52.5
Sep31° / 25°28624.912.12.7
Oct29° / 23°3582611.73.5
Nov27° / 22°42422.611.34.4
Dec25° / 21°3142211.14.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 81%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12080
21981
31981
41882
51882
61882
71783
81783
91783
101783
111684
121783
131783
141783
151882
161882
171981
182080
192080
202179
212179
222179
232179
242179
252179
262179
272179
282179
292179
302179

Chance of precipitation in September

Any precipitation

Quảng Ngãi gets around 286 mm of rain over 24.9 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 83% and peaks near 85% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
178
278
379
479
580
680
781
881
981
1082
1182
1282
1383
1483
1583
1683
1783
1883
1984
2084
2184
2284
2384
2484
2585
2685
2785
2885
2985
3085

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 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
12080
22080
32080
42179
52179
62179
72278
82278
92377
102476
112476
122575
132674
142773
152872
162971
173169
183268
193367
203466
213664
223763
233961
244060
254258
264456
274555
284753
294951
305149

Wind in September

Winds average 5 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
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
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 5:36 AM to 5:38 AM, and sunset from 5:53 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:365:53
212.35:365:53
312.35:365:52
412.35:365:51
512.25:365:50
612.25:365:50
712.25:365:49
812.25:365:48
912.25:365:47
1012.25:365:46
1112.25:365:46
1212.15:365:45
1312.15:365:44
1412.15:375:43
1512.15:375:42
1612.15:375:42
1712.15:375:41
1812.15:375:40
1912.05:375:39
2012.05:375:38
2112.05:375:38
2212.05:375:37
2312.05:375:36
2412.05:375:35
2512.05:375:34
2611.95:375:34
2711.95:375:33
2811.95:385:32
2911.95:385:31
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 5.01 kWh/m².

For context, solar energy here swings from a low near 2.86 kWh/m² to a high of 6.17 kWh/m² in April across the year — September's 5.01 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.4Bright
65.3Bright
75.3Bright
85.3Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.5Bright
Planning a trip in September

Hazard calendar for Quảng Ngãi

In seasonPeak

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

Quảng Ngãi sits in the Pacific typhoon belt; the season peaks July–October.

Quảng Ngãi'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 Quảng Ngãi?

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

2.7
Sightseeing
8th-best month of the year
4.1
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Quảng Ngãi.

What to pack for Quảng Ngãi in September

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

In September, Quảng Ngãi sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Quảng Ngãi 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 30 km away) is warmest in August at about 30°C and coldest in February near 24°C.

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

22°24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Refreshing
Mar24Warm
Apr26Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov27Warm
Dec25Warm

UV index in Quảng Ngãi 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 Quảng Ngãi peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 11UV 13Dec 16UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec7High

Air quality in Quảng Ngãi 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 Quảng Ngãi is worst in March — around 35 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2335 µg/m³Nov 1815 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb22Moderate
Mar35Moderate
Apr34Moderate
May28Moderate
Jun23Moderate
Jul17Moderate
Aug17Moderate
Sep17Moderate
Oct17Moderate
Nov15Moderate
Dec16Moderate
Location & terrain

Where is Quảng Ngãi?

Quảng Ngãi sits at 15.1°N, 108.8°E, 13 m above sea level, in Vietnam. The nearest listed city is Mỹ Khê, 12 km away.

Hoi An

Topography around Quảng Ngãi

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

Within 3 km, the terrain around Quảng Ngãi has only modest variations in elevation — a maximum elevation change of 57 m around an average of 9 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 921 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,931 m.

The land around Quảng Ngãi is covered by artificial surfaces (46%) and trees (23%) within 3 km, trees (49%) and cropland (22%) within 16 km, and trees (49%) and water (42%) within 80 km.

3 km
57 m
16 km
921 m
80 km
1,931 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mỹ Khê 12 km · Mỹ Lại 13 km · Núi Thành 37 km · Đức Phổ 39 km · Lý Sơn 45 km · Tam Kỳ 61 km · Đông Phú 87 km · Hoi An 98 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 Quảng Ngãi (15.1205°, 108.7923°, elevation 13 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).