Quán Hàu weather in September

In September, Quán Hàu sees average daytime highs of 29°C and overnight lows near 27°C, with 371 mm of rain across 18.8 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 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels miserable.

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 Quán Hàu's 8th-clearest and 10th-windiest month. For the whole year in context, see Quán Hàu's year-round climate.

Daytime high
29°
5th warmest
Overnight low
27°
9th coldest
Rainfall
371 mm
18.8 wet days
Daylight
12 h 06 min
5:45 AM – 5:51 PM
Cloud cover
74%
8th clearest
Wind
15 km/h
10th windiest
Solar energy
4.68 kWh/m²
Travel score
4.1
out of 10

Quán Hàu is township in Quảng Bình, Vietnam.

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 30°C in the first days to 28°C by the end.

A typical September day in Quán Hàu reaches about 29°C in the afternoon and slips back to 27°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 31°C. Set against its neighbours, September runs about 2°C cooler than August and about 2°C warmer than October.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13027
23027
33027
43027
53027
63027
73027
83027
93027
102927
112927
122927
132927
142927
152927
162927
172927
182927
192927
202926
212926
222926
232926
242826
252826
262826
272826
282826
292826
302826

How September really feels in Quán Hàu

Once humidity and wind are folded in, September averages 28 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
28
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.

Quán Hàu 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
Jan22° / 20°13117.411.15.3
Feb22° / 20°6712.611.46.0
Mar24° / 22°7110.611.96.8
Apr26° / 24°669.212.46.7
May29° / 27°8211.212.85.2
Jun31° / 28°546134.5
Jul31° / 28°877.312.94.5
Aug31° / 28°14211.612.64.3
Sep29° / 27°37118.812.14.1
Oct27° / 25°49223.111.64.6
Nov25° / 23°34220.611.25.0
Dec23° / 21°24321.2114.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 70%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22377
32377
42278
52278
62278
72377
82476
92476
102674
112674
122773
132872
142971
153070
163169
173268
183367
193367
203565
213664
223664
233763
243862
253862
263862
273961
284060
294060
304060

Chance of precipitation in September

Any precipitation

Quán Hàu gets around 371 mm of rain over 18.8 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 63% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
150
251
352
453
554
655
756
857
958
1059
1160
1261
1362
1463
1563
1664
1765
1865
1966
2067
2167
2268
2369
2470
2571
2672
2772
2873
2974
3074

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
103070
203169
303169
403268
503367
603367
703367
813465
913465
1013465
1113564
1213564
1313663
1413663
1513762
1613861
1713861
1823959
1923959
2024058
2124157
2224256
2324355
2424454
2524553
2634651
2734750
2844749
2944847
3054946

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

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 5:43 AM to 5:47 AM, and sunset from 6:03 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:436:03
212.35:436:03
312.35:436:02
412.35:436:01
512.35:436:00
612.35:445:59
712.25:445:58
812.25:445:58
912.25:445:57
1012.25:445:56
1112.25:445:55
1212.25:445:54
1312.15:445:53
1412.15:455:52
1512.15:455:52
1612.15:455:51
1712.15:455:50
1812.15:455:49
1912.05:455:48
2012.05:455:47
2112.05:465:46
2212.05:465:45
2312.05:465:45
2412.05:465:44
2511.95:465:43
2611.95:465:42
2711.95:465:41
2811.95:475:40
2911.95:475:39
3011.95:475:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.96 kWh/m² in May across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Quán Hàu

In seasonPeak

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

Quán Hàu sits in the Pacific typhoon belt; the season peaks July–October.

Quán Hàu'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 Quán Hàu?

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

4.1
Sightseeing
12th-best month of the year
5.3
Beach & pool
7th-best month of the year

September is a reasonable time to visit Quán Hàu for sightseeing.

What to pack for Quán Hàu in September

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

In September, Quán Hàu sees daytime highs around 29°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

Sea temperature near Quán Hàu 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 25 km away) is warmest in August at about 30°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
Jan22Refreshing
Feb22Refreshing
Mar23Refreshing
Apr25Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec24Refreshing

UV index in Quán Hàu 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 Quán Hàu peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 12UV 13Dec 16UV 6
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar9Very high
Apr9Very high
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec6High

Air quality in Quán Hàu 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 Quán Hàu is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (July, 13 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 1064 µg/m³Jul 1514 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb26Moderate
Mar62Unhealthy
Apr65Unhealthy
May21Moderate
Jun14Moderate
Jul13Moderate
Aug14Moderate
Sep16Moderate
Oct20Moderate
Nov18Moderate
Dec21Moderate
Location & terrain

Where is Quán Hàu?

Quán Hàu sits at 17.4°N, 106.6°E, 13 m above sea level, in Vietnam. The nearest listed city is Đồng Hới, 7.0 km away.

thị xã Quảng TrịPhong Điền

Topography around Quán Hàu

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

Within 3 km, the terrain around Quán Hàu has only modest variations in elevation — a maximum elevation change of 25 m around an average of 5 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 711 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,630 m.

The land around Quán Hàu is covered by cropland (30%) within 3 km, trees (35%) and water (35%) within 16 km, and trees (62%) and water (31%) within 80 km.

3 km
25 m
16 km
711 m
80 km
1,630 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Đồng Hới 7.0 km · Hoàn Lão 23 km · Ba Đồn 45 km · Cam Lộ 76 km · Ðông Hà 82 km · Kỳ Anh 82 km · thị xã Quảng Trị 93 km · Phong Điền 119 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 Quán Hàu (17.4044°, 106.6407°, 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).