Thị Trấn Na Dương weather in September

In September, Thị Trấn Na Dương sees average daytime highs of 29°C and overnight lows near 23°C, with 161 mm of rain across 18.3 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Thị Trấn Na Dương's 4th-clearest and 11th-windiest month. For the whole year in context, see Thị Trấn Na Dương's year-round climate.

Daytime high
29°
4th warmest
Overnight low
23°
9th coldest
Rainfall
161 mm
18.3 wet days
Daylight
12 h 06 min
5:43 AM – 5:50 PM
Cloud cover
69%
4th clearest
Wind
7 km/h
11th windiest
Solar energy
4.42 kWh/m²
Travel score
4.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Thị Trấn Na Dương reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, September runs about 1°C cooler than August and about 3°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63023
73023
83023
93023
102923
112923
122923
132923
142923
152923
162923
172923
182923
192923
202922
212922
222922
232922
242922
252922
262822
272822
282822
292822
302821

How September really feels in Thị Trấn Na Dương

Once humidity and wind are folded in, September averages 17 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
17
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.

Thị Trấn Na Dương weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan17° / 11°509.510.85.1
Feb18° / 12°378.611.35.7
Mar21° / 16°7112.611.85.8
Apr26° / 20°8714.112.55.7
May29° / 23°20420.8134.1
Jun30° / 24°23623.613.33.1
Jul30° / 25°25124.313.23.1
Aug30° / 24°27225.212.73.1
Sep29° / 23°16118.312.14.3
Oct27° / 20°7510.511.56.6
Nov23° / 16°498117.1
Dec19° / 12°427.710.76.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22575
32476
42476
52476
62674
72674
82674
92773
102971
113070
123169
133169
143367
153466
163664
173763
183862
193961
204159
214159
224456
234456
244555
254654
264753
274852
285050
294951
305149

Chance of precipitation in September

Any precipitation

Thị Trấn Na Dương gets around 161 mm of rain over 18.3 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 61% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
176
276
375
475
574
674
773
872
971
1070
1169
1268
1366
1464
1563
1661
1759
1857
1956
2054
2152
2251
2350
2449
2548
2647
2746
2845
2944
3044

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10046531
20056530
30056629
40166528
50166627
60176626
71186525
81286524
91296523
1013106422
1113116421
1214126320
1314136319
1415146317
1516156216
1617166115
1717176114
1818186013
1919195912
2019215811
21210225511
22210235510
2321124549
2421125539
2521227518
2631227517
2731328497
2841329486
2941430466
3051430455

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
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 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 5:39 AM to 5:47 AM, and sunset from 6:05 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:396:05
212.45:396:04
312.45:396:03
412.45:406:02
512.45:406:01
612.35:406:00
712.35:405:59
812.35:415:58
912.35:415:57
1012.35:415:56
1112.25:415:55
1212.25:425:54
1312.25:425:53
1412.25:425:52
1512.15:435:51
1612.15:435:50
1712.15:435:49
1812.15:435:48
1912.15:445:47
2012.05:445:46
2112.05:445:45
2212.05:445:44
2312.05:455:43
2412.05:455:42
2511.95:455:41
2611.95:465:40
2711.95:465:39
2811.95:465:38
2911.85:465:37
3011.85:475:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.42 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 4.68 kWh/m² in July across the year — September's 4.42 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Thị Trấn Na Dương

In seasonPeak

In September, Thị Trấn Na Dương sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Thị Trấn Na Dương's monsoon runs May–September, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Thị Trấn Na Dương?

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

4.3
Sightseeing
8th-best month of the year
5.5
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Thị Trấn Na Dương for sightseeing.

What to pack for Thị Trấn Na Dương in September

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

In September, Thị Trấn Na Dương sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 18 days see rain.

light clothesrain gear

UV index in Thị Trấn Na Dương in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thị Trấn Na Dương peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 23UV 12Dec 14UV 6
UV index (midday)Level
Jan7High
Feb7High
Mar9Very high
Apr7Very high
May9Very high
Jun12Extreme
Jul12Extreme
Aug9Very high
Sep9Very high
Oct8Very high
Nov6High
Dec6High

Air quality in Thị Trấn Na Dương 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 Thị Trấn Na Dương is worst in April — around 47 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (July, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 2447 µg/m³Jul 1819 µg/m³
PM2.5 (µg/m³)Level
Jan47Poor
Feb47Poor
Mar45Poor
Apr47Poor
May31Moderate
Jun22Moderate
Jul19Moderate
Aug21Moderate
Sep26Moderate
Oct32Moderate
Nov36Poor
Dec43Poor
Location & terrain

Where is Thị Trấn Na Dương?

Thị Trấn Na Dương sits at 21.7°N, 107.0°E, 287 m above sea level, in Vietnam. The nearest listed city is Lạng Sơn, 26 km away.

Topography around Thị Trấn Na Dương

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thị Trấn Na Dương.

Within 3 km, the terrain around Thị Trấn Na Dương has only modest variations in elevation — a maximum elevation change of 193 m around an average of 294 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,313 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,567 m.

The land around Thị Trấn Na Dương is covered by trees (47%) and cropland (22%) within 3 km, trees (78%) within 16 km, and trees (87%) within 80 km.

3 km
193 m
16 km
1,313 m
80 km
1,567 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Lạng Sơn 26 km · Chũ 54 km · Thị Trấn Ba Chẽ 59 km · Thị Trấn Tiên Yên 62 km · Thành Phố Uông Bí 77 km · Thị Trấn Đầm Hà 77 km · Thị Trấn Thất Khê 79 km · Thị Trấn Mạo Khê 81 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 Thị Trấn Na Dương (21.7025°, 106.9555°, elevation 287 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. 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).