Qui Nhon weather in September

In September, Qui Nhon sees average daytime highs of 30°C and overnight lows near 26°C, with 226 mm of rain across 22.9 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 31°C in the first days to 29°C by the end. The sky is clear or mostly clear about 9% 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 Qui Nhon's 12th-clearest and 12th-windiest month. For the whole year in context, see Qui Nhon's year-round climate.

Daytime high
30°
5th warmest
Overnight low
26°
8th coldest
Rainfall
226 mm
22.9 wet days
Daylight
12 h 06 min
5:35 AM – 5:40 PM
Cloud cover
79%
12th clearest
Wind
10 km/h
12th windiest
Solar energy
5.04 kWh/m²
Travel score
3.2
out of 10

Qui Nhon is provincial city of Vietnam.

Density
1,815/km²
people per km²
Founded
1986

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 31°C in the first days to 29°C by the end.

A typical September day in Qui Nhon reaches about 30°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123126
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
252925
262925
272925
282925
292925
302925

How September really feels in Qui Nhon

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.

Qui Nhon 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°1091611.36.0
Feb25° / 22°5310.311.56.7
Mar27° / 23°6010.211.96.8
Apr29° / 25°6210.112.35.8
May30° / 26°15118.312.63.9
Jun31° / 27°9016.112.83.5
Jul31° / 27°821512.73.7
Aug31° / 27°10616.112.53.5
Sep30° / 26°22622.912.13.2
Oct28° / 25°35826.211.73.9
Nov26° / 24°41623.111.44.5
Dec25° / 22°28322.511.24.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12179
22080
32080
42080
51981
61882
71882
81882
91882
101882
111882
121882
131882
141981
151981
161981
172179
182179
192278
202377
212377
222377
232476
242575
252575
262575
272575
282674
292674
302773

Chance of precipitation in September

Any precipitation

Qui Nhon gets around 226 mm of rain over 22.9 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 77% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
163
264
365
466
567
668
769
870
972
1073
1174
1275
1376
1477
1578
1679
1779
1880
1981
2081
2182
2282
2383
2483
2584
2684
2785
2885
2986
3086

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
106139
206139
306238
406337
506436
606436
706535
806634
906634
1006733
1106733
1206733
1306832
1406832
1506832
1606931
1706931
1806931
1906931
2006931
2106931
2206931
2306931
2406931
2506931
2606931
2707030
2807030
2916930
3016930

Wind in September

Winds average 10 km/h in September, the calmest month.

Across September, daily wind ranges from about 10 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
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 5:35 AM to 5:36 AM, and sunset from 5:51 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:355:51
212.35:355:50
312.25:355:49
412.25:355:49
512.25:355:48
612.25:355:47
712.25:355:47
812.25:355:46
912.25:355:45
1012.25:355:44
1112.15:355:44
1212.15:355:43
1312.15:355:42
1412.15:355:41
1512.15:355:40
1612.15:355:40
1712.15:355:39
1812.05:355:38
1912.05:355:37
2012.05:355:37
2112.05:355:36
2212.05:355:35
2312.05:355:34
2412.05:355:34
2512.05:355:33
2611.95:355:32
2711.95:365:31
2811.95:365:31
2911.95:365:30
3011.95:365:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.04 kWh/m².

For context, solar energy here swings from a low near 3.08 kWh/m² to a high of 6.1 kWh/m² in April across the year — September's 5.04 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
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
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Qui Nhon

In seasonPeak

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

Qui Nhon sits in the Pacific typhoon belt; the season peaks July–October.

Qui Nhon'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 Qui Nhon?

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

3.2
Sightseeing
12th-best month of the year
4.5
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Qui Nhon.

What to pack for Qui Nhon in September

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

In September, Qui Nhon sees daytime highs around 30°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 Qui Nhon 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 20 km away) is warmest in September at about 29°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°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb24Warm
Mar25Warm
Apr27Warm
May28Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Warm
Nov27Warm
Dec25Warm

UV index in Qui Nhon 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 Qui Nhon peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 14UV 13Dec 16UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Qui Nhon 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 Qui Nhon is worst in April — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1616 µg/m³Nov 1613 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar15Moderate
Apr16Moderate
May15Moderate
Jun16Moderate
Jul15Moderate
Aug16Moderate
Sep14Moderate
Oct14Moderate
Nov13Moderate
Dec14Moderate
Location & terrain

Where is Qui Nhon?

Qui Nhon sits at 13.8°N, 109.2°E, 7 m above sea level, in Vietnam. The nearest listed city is An Nhơn, 17 km away.

A Yun PaTu BôngĐức PhổEa Drăng

Topography around Qui Nhon

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

Within 3 km, the terrain around Qui Nhon has significant variations in elevation — a maximum elevation change of 272 m around an average of 11 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 732 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,301 m.

The land around Qui Nhon is covered by water (45%) and artificial surfaces (34%) within 3 km, water (43%) and trees (28%) within 16 km, and trees (47%) and water (37%) within 80 km.

3 km
272 m
16 km
732 m
80 km
1,301 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: An Nhơn 17 km · Sông Cầu 36 km · An Khê 65 km · Tuy Hòa 76 km · A Yun Pa 95 km · Tu Bông 113 km · Đức Phổ 119 km · Ea Drăng 127 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 Qui Nhon (13.7765°, 109.2237°, elevation 7 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).