Hà Tĩnh weather in September

In September, Hà Tĩnh sees average daytime highs of 30°C and overnight lows near 26°C, with 391 mm of rain across 19.1 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 31°C in the first days to 29°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 Hà Tĩnh's 7th-clearest and 11th-windiest month. For the whole year in context, see Hà Tĩnh's year-round climate.

Daytime high
30°
5th warmest
Overnight low
26°
8th coldest
Rainfall
391 mm
19.1 wet days
Daylight
12 h 06 min
5:48 AM – 5:54 PM
Cloud cover
76%
7th clearest
Wind
9 km/h
11th windiest
Solar energy
4.34 kWh/m²
Travel score
3.8
out of 10

Hà Tĩnh is province capital city in Vietnam.

Density
47/km²
people per km²
Founded
2007

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 Hà Tĩnh 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 27°C and 33°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13126
23126
33126
43126
53126
63126
73126
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925

How September really feels in Hà Tĩnh

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.

Hà Tĩnh 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° / 17°10315.1115.4
Feb22° / 18°6712.111.46.0
Mar25° / 20°6910.111.96.7
Apr28° / 23°7710.512.45.7
May31° / 26°11813.612.94.0
Jun33° / 28°71813.13.4
Jul33° / 28°1269.6133.4
Aug32° / 27°19113.812.63.5
Sep30° / 26°39119.112.13.8
Oct27° / 24°53822.511.64.6
Nov25° / 21°27218.311.15.3
Dec22° / 18°16617.410.95.2

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 12% 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 (%)
12179
22179
32179
42179
52179
62179
72179
82179
92278
102377
112476
122575
132575
142674
152872
162872
172971
183169
193169
203268
213268
223466
233466
243466
253664
263664
273664
283763
293763
303862

Chance of precipitation in September

Any precipitation

Hà Tĩnh gets around 391 mm of rain over 19.1 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 64% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
157
258
358
459
559
660
761
861
962
1063
1163
1264
1365
1465
1566
1666
1766
1866
1966
2066
2167
2267
2367
2467
2568
2668
2769
2869
2970
3070

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1002377
2002476
3002476
4012574
5012574
6012673
7012673
8012673
9022771
10022771
11022870
12032869
13032968
14033067
15043165
16043264
17043363
18043462
19053560
20053659
21053758
22053956
23054055
24054253
25064351
26064449
27064647
28174746
29174844
30184942

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3011calm

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 5:45 AM to 5:50 AM, and sunset from 6:07 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:456:07
212.35:456:06
312.35:456:05
412.35:466:04
512.35:466:04
612.35:466:03
712.35:466:02
812.25:466:01
912.25:476:00
1012.25:475:59
1112.25:475:58
1212.25:475:57
1312.25:475:56
1412.15:475:56
1512.15:475:55
1612.15:485:54
1712.15:485:53
1812.15:485:52
1912.05:485:51
2012.05:485:50
2112.05:485:49
2212.05:495:48
2312.05:495:47
2412.05:495:47
2511.95:495:46
2611.95:495:45
2711.95:505:44
2811.95:505:43
2911.95:505:42
3011.95:505:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.64 kWh/m² in June across the year — September's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Hà Tĩnh

In seasonPeak

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

Hà Tĩnh sits in the Pacific typhoon belt; the season peaks July–October.

Hà Tĩnh's monsoon runs September–November, 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 Hà Tĩnh?

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

3.8
Sightseeing
9th-best month of the year
5.2
Beach & pool
7th-best month of the year

September is a weaker month for outdoor sightseeing in Hà Tĩnh.

What to pack for Hà Tĩnh in September

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

In September, Hà Tĩnh sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. About 19 days see rain.

light clothesrain gear

Sea temperature near Hà Tĩnh 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 23 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
Jan22Refreshing
Feb21Refreshing
Mar22Refreshing
Apr24Warm
May28Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Hà Tĩnh 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 Hà Tĩnh peaks around July 20 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 highExtremeVery highHighJul 20UV 13Dec 15UV 6
UV index (midday)Level
Jan8Very high
Feb9Very high
Mar10Very high
Apr9Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov7Very high
Dec6High

Air quality in Hà Tĩnh 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 Hà Tĩnh is worst in April — around 60 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (July, 14 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyModerateApr 1159 µg/m³Jul 1715 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb35Poor
Mar54Poor
Apr60Unhealthy
May24Moderate
Jun16Moderate
Jul14Moderate
Aug16Moderate
Sep20Moderate
Oct27Moderate
Nov28Moderate
Dec32Moderate
Location & terrain

Where is Hà Tĩnh?

Hà Tĩnh sits at 18.3°N, 105.9°E, 8 m above sea level, in Vietnam. The nearest listed city is Nghèn, 18 km away.

Topography around Hà Tĩnh

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

Within 3 km, the terrain around Hà Tĩnh has only modest variations in elevation — a maximum elevation change of 17 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 485 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,260 m.

The land around Hà Tĩnh is covered by artificial surfaces (41%) and cropland (35%) within 3 km, cropland (36%) and trees (28%) within 16 km, and trees (57%) and water (30%) within 80 km.

3 km
17 m
16 km
485 m
80 km
2,260 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nghèn 18 km · Hồng Lĩnh 29 km · Nghi Xuân 39 km · Bến Thủy 40 km · Vinh 43 km · Yên Vinh 44 km · Kỳ Anh 52 km · Diễn Thành 77 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 Hà Tĩnh (18.3428°, 105.9057°, elevation 8 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).