Ðông Hà weather in September

In September, Ðông Hà sees average daytime highs of 31°C and overnight lows near 25°C, with 298 mm of rain across 20.3 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 32°C in the first days to 30°C by the end. The sky is clear or mostly clear about 10% 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 Ðông Hà's 9th-clearest and 9th-windiest month. For the whole year in context, see Ðông Hà's year-round climate.

Daytime high
31°
5th warmest
Overnight low
25°
8th coldest
Rainfall
298 mm
20.3 wet days
Daylight
12 h 06 min
5:43 AM – 5:49 PM
Cloud cover
81%
9th clearest
Wind
8 km/h
9th windiest
Solar energy
4.53 kWh/m²
Travel score
3.2
out of 10

Ðông Hà is provincial city in Vietnam.

Density
2,251/km²
people per km²

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 32°C in the first days to 30°C by the end.

A typical September day in Ðông Hà reaches about 31°C in the afternoon and slips back to 25°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)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113125
123125
133125
143125
153125
163124
173124
183124
193124
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
302924

How September really feels in Ðông Hà

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.

Ðông Hà 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
Jan23° / 18°13518.211.15.3
Feb25° / 19°8413.511.45.9
Mar27° / 21°8813.611.95.7
Apr30° / 23°8914.212.44.3
May33° / 25°13418.612.82.9
Jun34° / 26°7110.8132.7
Jul34° / 26°9912.312.92.8
Aug33° / 26°12814.812.63.0
Sep31° / 25°29820.312.13.2
Oct28° / 23°44924.211.64.0
Nov26° / 21°40022.411.24.6
Dec23° / 19°29322.3114.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% 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 79%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11783
21684
31684
41585
51585
61585
71585
81585
91684
101783
111783
121882
131882
141981
152080
162080
172278
182377
192476
202476
212476
222575
232674
242674
252674
262674
272773
282773
292674
302674

Chance of precipitation in September

Any precipitation

Ðông Hà gets around 298 mm of rain over 20.3 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 68% and peaks near 78% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
159
259
360
460
560
661
761
862
963
1064
1165
1266
1367
1468
1568
1669
1770
1870
1971
2072
2172
2273
2374
2475
2575
2676
2777
2877
2978
3078

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107228
207129
307129
407030
507030
606931
706832
816633
916534
1016435
1116336
1216237
1316138
1416039
1515940
1615841
1715841
1815841
1915841
2015841
2115841
2215940
2315940
2425939
2525939
2626038
2726038
2826137
2926236
3036136

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:41 AM to 5:45 AM, and sunset from 6:01 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:416:01
212.35:416:00
312.35:426:00
412.35:425:59
512.35:425:58
612.35:425:57
712.25:425:56
812.25:425:56
912.25:425:55
1012.25:425:54
1112.25:435:53
1212.25:435:52
1312.15:435:51
1412.15:435:50
1512.15:435:50
1612.15:435:49
1712.15:435:48
1812.15:435:47
1912.05:435:46
2012.05:445:45
2112.05:445:44
2212.05:445:44
2312.05:445:43
2412.05:445:42
2511.95:445:41
2611.95:445:40
2711.95:445:39
2811.95:455:39
2911.95:455:38
3011.95:455:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.53 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.79 kWh/m² in June across the year — September's 4.53 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Ðông Hà

In seasonPeak

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

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

Ðông Hà'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 Ðông Hà?

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

3.2
Sightseeing
8th-best month of the year
4.8
Beach & pool
8th-best month of the year

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

What to pack for Ðông Hà in September

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

In September, Ðông Hà sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Ðông Hà 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 30 km away) is warmest in August at about 29°C and coldest in February near 22°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb22Refreshing
Mar23Refreshing
Apr25Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov26Warm
Dec24Warm

UV index in Ðông Hà 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 Ðông Hà peaks around August 13 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 highHighAug 13UV 13Dec 15UV 6
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar9Very high
Apr10Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec6High

Air quality in Ðông Hà 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 Ðông Hà is worst in March — around 76 µg/m³ PM2.5 (unhealthy), about 5.1× the cleanest month (July, 15 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateMar 2274 µg/m³Jul 1915 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb27Moderate
Mar76Unhealthy
Apr66Unhealthy
May26Moderate
Jun17Moderate
Jul15Moderate
Aug16Moderate
Sep19Moderate
Oct21Moderate
Nov18Moderate
Dec21Moderate
Location & terrain

Where is Ðông Hà?

Ðông Hà sits at 16.8°N, 107.1°E, 21 m above sea level, in Vietnam. The nearest listed city is Cam Lộ, 11 km away.

Topography around Ðông Hà

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

Within 3 km, the terrain around Ðông Hà has only modest variations in elevation — a maximum elevation change of 44 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 204 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,059 m.

The land around Ðông Hà is covered by artificial surfaces (38%), cropland (24%) and trees (21%) within 3 km, trees (52%) and cropland (22%) within 16 km, and trees (60%) and water (29%) within 80 km.

3 km
44 m
16 km
204 m
80 km
2,059 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cam Lộ 11 km · thị xã Quảng Trị 11 km · Phong Điền 38 km · Hương Trà 51 km · Hue 66 km · Hương Thủy 72 km · Quán Hàu 82 km · Đồng Hới 89 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 Ðông Hà (16.8163°, 107.1003°, elevation 21 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).