Bắc Kạn weather in September

In September, Bắc Kạn sees average daytime highs of 29°C and overnight lows near 22°C, with 181 mm of rain across 18.9 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 19% 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 Bắc Kạn's 4th-clearest and 9th-windiest month. For the whole year in context, see Bắc Kạn's year-round climate.

Daytime high
29°
4th warmest
Overnight low
22°
9th coldest
Rainfall
181 mm
18.9 wet days
Daylight
12 h 06 min
5:47 AM – 5:55 PM
Cloud cover
70%
4th clearest
Wind
5 km/h
9th windiest
Solar energy
4.32 kWh/m²
Travel score
4.1
out of 10

Bắc Kạn is city in Vietnam.

Density
329/km²
people per km²
Founded
2015

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 Bắc Kạn reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
132923
142923
152922
162922
172922
182922
192922
202922
212922
222922
232922
242922
252922
262922
272921
282921
292921
302821

How September really feels in Bắc Kạn

Once humidity and wind are folded in, September averages 18 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
18
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.

Bắc Kạn 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°6812.510.84.9
Feb19° / 13°5911.711.25.3
Mar21° / 16°10116.311.85.3
Apr26° / 19°12817.712.55.2
May29° / 22°26722.5133.9
Jun30° / 24°38625.813.32.9
Jul30° / 24°39827.813.22.8
Aug30° / 24°34426.712.82.9
Sep29° / 22°18118.912.14.1
Oct27° / 20°8512.511.56.1
Nov23° / 16°689.610.96.7
Dec19° / 12°509.210.76.1

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 15% of September, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12476
22476
32476
42575
52674
62674
72674
82773
92971
102971
113070
123070
133169
143367
153466
163565
173664
183664
193862
203961
214060
224060
234159
244258
254357
264258
274357
284456
294456
304357

Chance of precipitation in September

Any precipitation

Bắc Kạn gets around 181 mm of rain over 18.9 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 79% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
179
279
378
477
576
675
774
873
972
1070
1169
1267
1366
1464
1563
1661
1760
1858
1957
2056
2155
2254
2353
2452
2551
2651
2750
2850
2949
3049

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10046927
20047026
30057025
40166924
50176923
60177022
70187021
80296920
902116819
1002126818
1103136717
1203146716
1303166714
1404176613
1504196512
1605206411
1705226310
181623619
191624618
201726588
211827577
221828567
231930546
2411031526
2521032515
2621132505
2721233484
2831333474
2931334463
3041434453

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:43 AM to 5:51 AM, and sunset from 6:10 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:436:10
212.45:436:09
312.45:446:08
412.45:446:07
512.45:446:06
612.35:446:05
712.35:456:04
812.35:456:03
912.35:456:02
1012.35:466:01
1112.25:466:00
1212.25:465:59
1312.25:465:58
1412.25:475:57
1512.15:475:56
1612.15:475:55
1712.15:475:54
1812.15:485:53
1912.15:485:52
2012.05:485:51
2112.05:495:50
2212.05:495:49
2312.05:495:48
2412.05:505:47
2511.95:505:46
2611.95:505:45
2711.95:505:44
2811.95:515:43
2911.85:515:42
3011.85:515:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.32 kWh/m².

For context, solar energy here swings from a low near 2.05 kWh/m² to a high of 4.4 kWh/m² in August across the year — September's 4.32 kWh/m² sits near the top of that range.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.2Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Bắc Kạn

In seasonPeak

In September, Bắc Kạn sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Bắc Kạn'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 Bắc Kạn?

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

4.1
Sightseeing
8th-best month of the year
5.4
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Bắc Kạn for sightseeing.

What to pack for Bắc Kạn in September

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

In September, Bắc Kạn sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 19 days see rain.

light clothesrain gear

UV index in Bắc Kạn 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 Bắc Kạn peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 23UV 12Nov 23UV 6
UV index (midday)Level
Jan6High
Feb7Very high
Mar10Very high
Apr6High
May8Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep9Very high
Oct8Very high
Nov6High
Dec6High

Air quality in Bắc Kạn 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 Bắc Kạn is worst in April — around 48 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (July, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorApr 947 µg/m³Jul 2321 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb44Poor
Mar47Poor
Apr48Poor
May33Moderate
Jun24Moderate
Jul21Moderate
Aug21Moderate
Sep25Moderate
Oct30Moderate
Nov37Poor
Dec42Poor
Location & terrain

Where is Bắc Kạn?

Bắc Kạn sits at 22.1°N, 105.8°E, 150 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Đại Từ, 61 km away.

Topography around Bắc Kạn

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

Within 3 km, the terrain around Bắc Kạn has significant variations in elevation — a maximum elevation change of 284 m around an average of 189 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,438 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,052 m.

The land around Bắc Kạn is covered by trees (79%) within 3 km, trees (96%) within 16 km, and trees (94%) within 80 km.

3 km
284 m
16 km
1,438 m
80 km
2,052 m
treesgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Thị Trấn Đại Từ 61 km · Thái Nguyên 61 km · Thị Trấn Thất Khê 67 km · Cao Bằng 72 km · Thị Trấn Nước Hai 73 km · Tuyên Quang 73 km · Thành phố Sông Công 74 km · Phổ Yên 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 Bắc Kạn (22.147°, 105.8348°, elevation 150 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).