Thị Trấn Ba Chẽ weather in April

In April, Thị Trấn Ba Chẽ sees average daytime highs of 26°C and overnight lows near 21°C, with 64 mm of rain across 11.5 wet days and about 12.5 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 28°C by the end. The sky is clear or mostly clear about 11% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 48 min by month's end. Set against the rest of the year, April is Thị Trấn Ba Chẽ's 5th-clearest and 7th-windiest month. For the whole year in context, see Thị Trấn Ba Chẽ's year-round climate.

Daytime high
26°
7th warmest
Overnight low
21°
6th coldest
Rainfall
64 mm
11.5 wet days
Daylight
12 h 30 min
5:36 AM – 6:06 PM
Cloud cover
76%
5th clearest
Wind
8 km/h
7th windiest
Solar energy
4.28 kWh/m²
Travel score
6.0
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 28°C by the end.

A typical April day in Thị Trấn Ba Chẽ reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, April runs about 4°C warmer than March and about 3°C cooler than May.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12419
22419
32419
42419
52420
62520
72520
82520
92520
102520
112520
122520
132621
142621
152621
162621
172621
182621
192721
202722
212722
222722
232722
242722
252722
262822
272822
282822
292823
302823

How April really feels in Thị Trấn Ba Chẽ

Once humidity and wind are folded in, April averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Thị Trấn Ba Chẽ weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 13°346.310.86.2
Feb20° / 15°215.411.36.4
Mar22° / 17°458.211.86.5
Apr26° / 21°6411.512.56.0
May29° / 24°20819.7134.0
Jun31° / 26°2982413.32.8
Jul31° / 26°33825.613.22.8
Aug31° / 25°37426.312.72.8
Sep30° / 24°22719.512.13.7
Oct28° / 22°8710.411.56.0
Nov25° / 18°497.9117.2
Dec21° / 14°336.310.76.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 11% of April, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11684
21684
31684
41684
51783
61783
71882
81882
91981
102080
112179
122179
132278
142377
152377
162476
172476
182575
192575
202575
212575
222476
232575
242476
252476
262476
272476
282476
292575
302476

Chance of precipitation in April

Any precipitation

Thị Trấn Ba Chẽ gets around 64 mm of rain over 11.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
134
234
334
434
534
634
734
835
935
1036
1136
1237
1337
1438
1538
1639
1740
1840
1941
2042
2142
2243
2344
2445
2546
2647
2748
2849
2950
3051

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the oppressive band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
18102332270
2792332291
3792231301
4692131321
5692130341
6582030351
7581929371
8581928391
9481827402
10481727422
11481626442
12381525453
13381524473
14381424484
15371323504
16271222525
17271222516
18261122536
19161121547
20151021558
21151021549
22159215410
23149215411
24048215512
25038215414
26037205515
27037205317
28037205119
29027195121
30026194923

Wind in April

Winds average 8 km/h in April.

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

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over April. Sunrise moves from 5:50 AM to 5:26 AM, and sunset from 6:01 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:506:01
212.25:496:01
312.25:486:02
412.25:476:02
512.35:466:02
612.35:456:03
712.35:446:03
812.35:446:03
912.35:436:03
1012.45:426:04
1112.45:416:04
1212.45:406:04
1312.45:396:05
1412.45:386:05
1512.55:376:05
1612.55:366:06
1712.55:366:06
1812.55:356:06
1912.55:346:07
2012.65:336:07
2112.65:326:07
2212.65:326:08
2312.65:316:08
2412.65:306:09
2512.75:296:09
2612.75:286:09
2712.75:286:10
2812.75:276:10
2912.75:266:10
3012.85:266:11

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.28 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 4.77 kWh/m² in May across the year — April's 4.28 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.7Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Bright
114.1Bright
124.1Bright
134.2Bright
144.2Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.5Bright
204.5Bright
214.5Bright
224.6Bright
234.6Bright
244.6Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in April

Hazard calendar for Thị Trấn Ba Chẽ

In seasonPeak

In April, Thị Trấn Ba Chẽ sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Thị Trấn Ba Chẽ sits in the Pacific typhoon belt; the season peaks July–October.

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

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

Is April a good time to visit Thị Trấn Ba Chẽ?

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

6.0
Sightseeing
6th-best month of the year
5.7
Beach & pool
3rd-best month of the year

April is a reasonable time to visit Thị Trấn Ba Chẽ for sightseeing.

What to pack for Thị Trấn Ba Chẽ in April

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

In April, Thị Trấn Ba Chẽ sees daytime highs around 26°C and nights near 21°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Thị Trấn Ba Chẽ in April

The nearest coast averages about 23°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 39 km away) is warmest in August at about 30°C and coldest in February near 19°C.

It's comfortable for a long swim from Mar 15 to Jan 4 — about 9.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar20Refreshing
Apr23Refreshing
May27Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov25Warm
Dec21Refreshing

UV index in Thị Trấn Ba Chẽ in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thị Trấn Ba Chẽ peaks around July 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highHighJul 11UV 12Dec 17UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul13Extreme
Aug8Very high
Sep9Very high
Oct9Very high
Nov7High
Dec6High

Air quality in Thị Trấn Ba Chẽ in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Thị Trấn Ba Chẽ is worst in January — around 42 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (July, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 2342 µg/m³Jul 1716 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb42Poor
Mar41Poor
Apr40Poor
May26Moderate
Jun19Moderate
Jul16Moderate
Aug18Moderate
Sep21Moderate
Oct27Moderate
Nov29Moderate
Dec39Poor
Location & terrain

Where is Thị Trấn Ba Chẽ?

Thị Trấn Ba Chẽ sits at 21.3°N, 107.3°E, 16 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Tiên Yên, 14 km away.

Topography around Thị Trấn Ba Chẽ

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

Within 3 km, the terrain around Thị Trấn Ba Chẽ has significant variations in elevation — a maximum elevation change of 422 m around an average of 94 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 885 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,603 m.

The land around Thị Trấn Ba Chẽ is covered by trees (88%) within 3 km, trees (82%) within 16 km, and trees (57%) and water (35%) within 80 km.

3 km
422 m
16 km
885 m
80 km
1,603 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
April weather nearby: Thị Trấn Tiên Yên 14 km · Cẩm Phả Mines 28 km · Cẩm Phả 29 km · Thị Trấn Đầm Hà 34 km · Ha Long 42 km · Thị Trấn Na Dương 59 km · Thành Phố Uông Bí 59 km · Cát Bà 65 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 Ba Chẽ (21.2716°, 107.2836°, elevation 16 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).