Hồng Lĩnh weather in September

In September, Hồng Lĩnh sees average daytime highs of 31°C and overnight lows near 26°C, with 342 mm of rain across 19.4 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 2nd-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 17% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Hồng Lĩnh's 7th-clearest and 8th-windiest month. For the whole year in context, see Hồng Lĩnh's year-round climate.

Daytime high
31°
5th warmest
Overnight low
26°
9th coldest
Rainfall
342 mm
19.4 wet days
Daylight
12 h 06 min
5:48 AM – 5:55 PM
Cloud cover
76%
7th clearest
Wind
7 km/h
8th windiest
Solar energy
4.35 kWh/m²
Travel score
3.3
out of 10

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 Hồng Lĩnh reaches about 31°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83226
93226
103226
113126
123126
133126
143126
153126
163126
173126
183126
193125
203125
213125
223125
233125
243125
253025
263025
273025
283025
293025
303025

How September really feels in Hồng Lĩnh

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.

Hồng Lĩnh weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 16°437.8116.4
Feb23° / 17°306.711.46.9
Mar26° / 20°507.311.96.9
Apr30° / 23°638.312.45.1
May33° / 26°1311312.93.2
Jun35° / 28°10010.513.12.3
Jul35° / 28°14412.7132.4
Aug33° / 27°20917.912.62.7
Sep31° / 26°34219.412.13.3
Oct29° / 23°41219.711.64.5
Nov26° / 20°1521411.15.9
Dec22° / 17°699.610.96.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11981
21981
32080
42080
52080
62080
72278
82278
92377
102476
112476
122674
132674
142773
152773
163070
173070
183169
193169
203169
213367
223367
233466
243466
253565
263565
273565
283664
293664
303664

Chance of precipitation in September

Any precipitation

Hồng Lĩnh gets around 342 mm of rain over 19.4 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 66% and peaks near 66% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
165
265
365
465
565
665
765
865
965
1065
1165
1265
1366
1466
1566
1666
1766
1866
1966
2066
2166
2265
2365
2466
2566
2666
2766
2866
2966
3066

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100496
200496
300595
400595
501693
601792
701891
801891
901990
10021088
11021187
12021286
13021286
14031384
15031483
16031582
17031681
18031780
19031978
20142075
21142174
22142273
23142372
24142471
25152569
26152668
27152767
28162865
29172963
30172963

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 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 30 minutes over September. Sunrise moves from 5:46 AM to 5:51 AM, and sunset from 6:08 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:466:08
212.45:466:07
312.35:466:06
412.35:466:05
512.35:476:04
612.35:476:04
712.35:476:03
812.25:476:02
912.25:476:01
1012.25:476:00
1112.25:485:59
1212.25:485:58
1312.25:485:57
1412.15:485:56
1512.15:485:56
1612.15:485:55
1712.15:495:54
1812.15:495:53
1912.05:495:52
2012.05:495:51
2112.05:495:50
2212.05:495:49
2312.05:505:48
2412.05:505:47
2511.95:505:46
2611.95:505:46
2711.95:505:45
2811.95:515:44
2911.95:515:43
3011.95:515:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.35 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 5.64 kWh/m² in June across the year — September's 4.35 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Hồng Lĩnh

In seasonPeak

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

Hồng Lĩnh sits in the Pacific typhoon belt; the season peaks July–October.

Hồng Lĩnh's monsoon runs August–October, 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 Hồng Lĩnh?

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

3.3
Sightseeing
8th-best month of the year
4.9
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Hồng Lĩnh.

What to pack for Hồng Lĩnh in September

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

In September, Hồng Lĩnh sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. About 19 days see rain.

light clothesrain gear

Sea temperature near Hồng Lĩnh in September

The nearest coast averages about 30°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 21 km away) is warmest in August at about 30°C and coldest in February near 21°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar22Refreshing
Apr24Warm
May28Warm
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Hồng Lĩnh 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 Hồng Lĩnh peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highVery highExtremeVery highHighAug 11UV 13Dec 15UV 6
UV index (midday)Level
Jan8Very high
Feb9Very high
Mar10Extreme
Apr9Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov7Very high
Dec6High

Air quality in Hồng Lĩnh 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 Hồng Lĩnh is worst in April — around 62 µg/m³ PM2.5 (unhealthy), about 3.5× the cleanest month (July, 18 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorApr 1161 µg/m³Jul 1618 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb52Poor
Mar57Unhealthy
Apr62Unhealthy
May35Poor
Jun20Moderate
Jul18Moderate
Aug21Moderate
Sep30Moderate
Oct41Poor
Nov47Poor
Dec52Poor
Location & terrain

Where is Hồng Lĩnh?

Hồng Lĩnh sits at 18.5°N, 105.7°E, 11 m above sea level, in Vietnam. The nearest listed city is Nghèn, 12 km away.

Topography around Hồng Lĩnh

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

Within 3 km, the terrain around Hồng Lĩnh has significant variations in elevation — a maximum elevation change of 360 m around an average of 36 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 670 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,269 m.

The land around Hồng Lĩnh is covered by trees (35%) and cropland (35%) within 3 km, cropland (43%) and trees (35%) within 16 km, and trees (57%) and water (27%) within 80 km.

3 km
360 m
16 km
670 m
80 km
2,269 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nghèn 12 km · Bến Thủy 14 km · Nghi Xuân 15 km · Yên Vinh 16 km · Vinh 16 km · Hà Tĩnh 29 km · Diễn Thành 51 km · Kim Liên 57 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 Hồng Lĩnh (18.5286°, 105.7064°, elevation 11 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).