An Nhơn weather in September

In September, An Nhơn sees average daytime highs of 32°C and overnight lows near 25°C, with 202 mm of rain across 22 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 33°C in the first days to 31°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 An Nhơn's 12th-clearest and 10th-windiest month. For the whole year in context, see An Nhơn's year-round climate.

Daytime high
32°
5th warmest
Overnight low
25°
8th coldest
Rainfall
202 mm
22 wet days
Daylight
12 h 06 min
5:36 AM – 5:40 PM
Cloud cover
81%
12th clearest
Wind
7 km/h
10th windiest
Solar energy
4.9 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 33°C in the first days to 31°C by the end.

A typical September day in An Nhơn reaches about 32°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 1°C cooler than August and about 3°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13326
23326
33326
43326
53326
63326
73326
83326
93226
103225
113225
123225
133225
143225
153225
163225
173225
183225
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293025
303025

How September really feels in An Nhơn

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.

An Nhơn 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
Jan25° / 20°6913.711.36.1
Feb26° / 21°358.711.56.7
Mar29° / 22°479.311.95.9
Apr31° / 24°5810.412.34.4
May33° / 26°12217.912.62.9
Jun34° / 27°8015.312.82.6
Jul33° / 26°8215.312.72.8
Aug33° / 26°9816.112.52.8
Sep32° / 25°2022212.12.8
Oct29° / 24°2782511.73.6
Nov27° / 23°31822.111.44.5
Dec25° / 21°19720.211.25.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12179
22080
31981
41981
51981
61981
71981
81882
91882
101882
111882
121882
131882
141882
151981
161981
172080
182080
192179
202179
212179
222179
232179
242278
252278
262278
272278
282179
292179
302278

Chance of precipitation in September

Any precipitation

An Nhơn gets around 202 mm of rain over 22 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 74% and peaks near 81% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
163
263
364
465
566
667
768
869
970
1071
1172
1273
1373
1474
1575
1676
1776
1877
1977
2077
2177
2278
2378
2478
2579
2679
2780
2880
2981
3081

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
117920
217920
317920
417821
517821
617722
717722
817623
917623
1017524
1117524
1217425
1317326
1417326
1517227
1617128
1707228
1807129
1907030
2006931
2106931
2206832
2306733
2406733
2506733
2606634
2706634
2806634
2906634
3016534

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
266calm
276calm
286calm
296calm
306calm

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 5:30 PM.

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

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.9 kWh/m².

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 6.08 kWh/m² in April across the year — September's 4.9 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
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for An Nhơn

In seasonPeak

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

An Nhơn sits in the Pacific typhoon belt; the season peaks July–October.

An Nhơn'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 An Nhơn?

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

2.8
Sightseeing
9th-best month of the year
4.4
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in An Nhơn.

What to pack for An Nhơn in September

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

In September, An Nhơn sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near An Nhơn 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 29 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 An Nhơn 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 An Nhơn peaks around August 13 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 13UV 13Dec 16UV 8
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec7Very high

Air quality in An Nhơn 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 An Nhơn is worst in March — around 33 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (July, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2032 µg/m³Jul 1914 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar33Moderate
Apr28Moderate
May19Moderate
Jun15Moderate
Jul13Moderate
Aug14Moderate
Sep16Moderate
Oct17Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is An Nhơn?

An Nhơn sits at 13.9°N, 109.1°E, 13 m above sea level, in Vietnam. The nearest listed city is Qui Nhon, 17 km away.

Đức PhổPleikuEa Drăng

Topography around An Nhơn

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

Within 3 km, the terrain around An Nhơn has only modest variations in elevation — a maximum elevation change of 113 m around an average of 10 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 642 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,452 m.

The land around An Nhơn is covered by cropland (50%), trees (20%) and artificial surfaces (20%) within 3 km, trees (39%) and cropland (35%) within 16 km, and trees (49%) and water (32%) within 80 km.

3 km
113 m
16 km
642 m
80 km
1,452 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Qui Nhon 17 km · Sông Cầu 49 km · An Khê 50 km · A Yun Pa 91 km · Tuy Hòa 91 km · Đức Phổ 104 km · Pleiku 120 km · Ea Drăng 123 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 An Nhơn (13.8858°, 109.1082°, 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).