Hàm Ninh weather in September

In September, Hàm Ninh sees average daytime highs of 28°C and overnight lows near 26°C, with 393 mm of rain across 26.7 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Hàm Ninh's 11th-clearest and 3rd-windiest month. For the whole year in context, see Hàm Ninh's year-round climate.

Daytime high
28°
10th warmest
Overnight low
26°
5th coldest
Rainfall
393 mm
26.7 wet days
Daylight
12 h 06 min
5:56 AM – 6:00 PM
Cloud cover
88%
11th clearest
Wind
23 km/h
3rd windiest
Solar energy
4.69 kWh/m²
Travel score
3.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Hàm Ninh reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Hàm Ninh

Once humidity and wind are folded in, September averages 18 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
18
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.

Hàm Ninh weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°348.311.56.7
Feb28° / 26°277.911.76.8
Mar28° / 27°6413.411.95.5
Apr29° / 27°12319.412.24.3
May29° / 27°31827.312.53.2
Jun29° / 27°37226.712.63.2
Jul28° / 26°40128.112.53.3
Aug28° / 26°37727.312.33.6
Sep28° / 26°39326.712.13.6
Oct28° / 26°3232711.83.7
Nov28° / 26°11815.911.54.8
Dec28° / 26°45911.46.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4892
5892
6892
7892
8793
9793
10892
11892
12892
13793
14892
15892
16892
171090
181090
191090
201090
211090
221090
231090
241189
251189
261189
271189
281189
291189
301090

Chance of precipitation in September

Any precipitation

Hàm Ninh gets around 393 mm of rain over 26.7 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 90% and peaks near 91% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
188
288
388
488
588
689
789
889
989
1089
1189
1290
1390
1490
1590
1690
1790
1890
1990
2090
2190
2290
2390
2490
2590
2690
2790
2890
2990
3091

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 73% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
11783
21882
31882
41981
52080
62080
72179
82179
92278
102377
112377
122476
132575
142575
152674
162674
172773
182773
192872
202872
212971
223070
233268
243367
253565
263763
273862
284060
294357
304555

Wind in September

Winds average 23 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1723breezy
1823breezy
1923breezy
2023breezy
2122breezy
2222breezy
2322breezy
2421breezy
2521breezy
2620breezy
2720breezy
2820light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 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 18 minutes over September. Sunrise moves from 5:58 AM to 5:56 AM, and sunset from 6:09 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:586:09
212.25:586:09
312.25:576:08
412.25:576:08
512.25:576:07
612.25:576:06
712.15:576:06
812.15:576:05
912.15:576:04
1012.15:576:04
1112.15:576:03
1212.15:576:02
1312.15:576:02
1412.15:576:01
1512.15:576:00
1612.15:566:00
1712.05:565:59
1812.05:565:58
1912.05:565:58
2012.05:565:57
2112.05:565:56
2212.05:565:56
2312.05:565:55
2412.05:565:55
2512.05:565:54
2612.05:565:53
2711.95:565:53
2811.95:565:52
2911.95:565:51
3011.95:565:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.69 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 6.33 kWh/m² in March across the year — September's 4.69 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Hàm Ninh

In seasonPeak

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

Hàm Ninh sits in the Pacific typhoon belt; the season peaks July–October.

Hàm Ninh's rainy season runs May–October, 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 Hàm Ninh?

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

3.6
Sightseeing
8th-best month of the year
3.9
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Hàm Ninh.

What to pack for Hàm Ninh in September

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

In September, Hàm Ninh sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 27 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Hàm Ninh 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 offshore is warmest in May at about 31°C and coldest in January near 28°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Hàm Ninh in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hàm Ninh peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 20UV 13Dec 15UV 9
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct11Extreme
Nov10Very high
Dec9Very high

Air quality in Hàm Ninh 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 Hàm Ninh is worst in February — around 33 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (August, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateFeb 1332 µg/m³Aug 2013 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb33Moderate
Mar28Moderate
Apr23Moderate
May17Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep14Moderate
Oct18Moderate
Nov21Moderate
Dec21Moderate
Location & terrain

Where is Hàm Ninh?

Hàm Ninh sits at 10.2°N, 104.0°E, 6 m above sea level, in Vietnam. The nearest listed city is Phu Quoc, 10 km away.

Tịnh BiênCô Tô

Topography around Hàm Ninh

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

Within 3 km, the terrain around Hàm Ninh has significant variations in elevation — a maximum elevation change of 375 m around an average of 39 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 432 m; within 80 km, large variations in elevation — a maximum elevation change of 1,080 m.

The land around Hàm Ninh is covered by trees (45%) and water (45%) within 3 km, water (64%) and trees (29%) within 16 km, and water (70%) within 80 km.

3 km
375 m
16 km
432 m
80 km
1,080 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Phu Quoc 10 km · Kep 45 km · Kampot 50 km · Hà Tiên 53 km · Sihanoukville 74 km · Kiên Hải 91 km · Tịnh Biên 108 km · Cô Tô 108 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 Hàm Ninh (10.1806°, 104.0477°, elevation 6 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).