Thành Phố Uông Bí weather in April

In April, Thành Phố Uông Bí sees average daytime highs of 27°C and overnight lows near 22°C, with 75 mm of rain across 12 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 25°C in the first days to 29°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 42 min by month's end. Set against the rest of the year, April is Thành Phố Uông Bí's 5th-clearest and 1st-windiest month. For the whole year in context, see Thành Phố Uông Bí's year-round climate.

Daytime high
27°
7th warmest
Overnight low
22°
6th coldest
Rainfall
75 mm
12 wet days
Daylight
12 h 30 min
5:39 AM – 6:08 PM
Cloud cover
74%
5th clearest
Wind
10 km/h
1st windiest
Solar energy
4.36 kWh/m²
Travel score
5.6
out of 10

Thành Phố Uông Bí is city in north-east, Vietnam.

Density
249/km²
people per km²
Founded
1961

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 25°C in the first days to 29°C by the end.

A typical April day in Thành Phố Uông Bí reaches about 27°C in the afternoon and slips back to 22°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°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)
12520
22520
32520
42521
52621
62621
72621
82621
92621
102621
112721
122722
132722
142722
152722
162722
172822
182822
192822
202823
212823
222823
232823
242923
252923
262923
272923
282923
292924
302924

How April really feels in Thành Phố Uông Bí

Once humidity and wind are folded in, April averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Thành Phố Uông Bí 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
Jan20° / 14°30610.96.4
Feb21° / 16°195.711.36.5
Mar23° / 18°439.111.96.6
Apr27° / 22°751212.55.6
May31° / 25°24119.8133.6
Jun32° / 27°26022.513.32.6
Jul32° / 27°29024.613.22.5
Aug32° / 26°37126.612.72.5
Sep31° / 25°24220.312.13.4
Oct29° / 22°10412.511.55.4
Nov26° / 19°537.8117.1
Dec22° / 15°295.710.77.1

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 13% of April, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21981
32080
42080
52080
62179
72278
82278
92278
102278
112377
122575
132575
142575
152674
162674
172773
182773
192773
202674
212674
222674
232674
242773
252773
262773
272773
282773
292872
302971

Chance of precipitation in April

Any precipitation

Thành Phố Uông Bí gets around 75 mm of rain over 12 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 41% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
137
237
337
438
538
638
738
838
938
1038
1139
1239
1339
1439
1539
1639
1740
1840
1940
2041
2141
2242
2343
2444
2545
2646
2747
2848
2949
3050

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 45% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1681733351
2681732362
3581731382
4581630392
5471629413
6471627423
7471626443
8371525454
9371524465
10371523475
11371422486
12271321498
13271320499
142612205010
152611195012
161611195013
171511195014
181510185016
191510184917
20149184919
21149184920
22138184822
23038174824
24037174726
25027164628
26026164530
27026164432
28026154334
29026154136
30015154038

Wind in April

Winds average 10 km/h in April, the windiest month of the year.

Across April, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over April. Sunrise moves from 5:52 AM to 5:28 AM, and sunset from 6:03 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:526:03
212.25:516:03
312.25:506:04
412.25:496:04
512.35:486:04
612.35:486:04
712.35:476:05
812.35:466:05
912.35:456:05
1012.45:446:06
1112.45:436:06
1212.45:426:06
1312.45:416:07
1412.45:406:07
1512.55:406:07
1612.55:396:08
1712.55:386:08
1812.55:376:08
1912.55:366:09
2012.65:356:09
2112.65:356:09
2212.65:346:10
2312.65:336:10
2412.65:326:10
2512.75:316:11
2612.75:316:11
2712.75:306:11
2812.75:296:12
2912.75:296:12
3012.75:286:13

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.36 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 4.96 kWh/m² in June across the year — April's 4.36 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.7Moderate
33.7Moderate
43.8Moderate
53.8Moderate
63.9Moderate
73.9Moderate
84.0Moderate
94.0Bright
104.1Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.4Bright
164.4Bright
174.5Bright
184.5Bright
194.6Bright
204.6Bright
214.7Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in April

Hazard calendar for Thành Phố Uông Bí

In seasonPeak

In April, Thành Phố Uông Bí sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Thành Phố Uông Bí sits in the Pacific typhoon belt; the season peaks July–October.

Thành Phố Uông Bí'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 Thành Phố Uông Bí?

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

5.6
Sightseeing
6th-best month of the year
6.0
Beach & pool
3rd-best month of the year

April is a reasonable time to visit Thành Phố Uông Bí for sightseeing.

What to pack for Thành Phố Uông Bí in April

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

In April, Thành Phố Uông Bí sees daytime highs around 27°C and nights near 22°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Thành Phố Uông Bí 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 47 km away) is warmest in August at about 30°C and coldest in February near 20°C.

It's comfortable for a long swim from Feb 28 to Jan 27 — about 11 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Refreshing
Feb20Cool
Mar20Refreshing
Apr23Refreshing
May27Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Thành Phố Uông Bí in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thành Phố Uông Bí peaks around July 10 at about 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 10UV 12Dec 15UV 6
UV index (midday)Level
Jan7High
Feb7Very high
Mar8Very high
Apr7Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug8Very high
Sep9Very high
Oct9Very high
Nov6High
Dec6High

Air quality in Thành Phố Uông Bí 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 Thành Phố Uông Bí is worst in December — around 92 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (July, 35 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 2192 µg/m³Jul 1335 µg/m³
PM2.5 (µg/m³)Level
Jan90Unhealthy
Feb80Unhealthy
Mar76Unhealthy
Apr66Unhealthy
May49Poor
Jun37Poor
Jul35Moderate
Aug40Poor
Sep59Unhealthy
Oct74Unhealthy
Nov82Unhealthy
Dec92Unhealthy
Location & terrain

Where is Thành Phố Uông Bí?

Thành Phố Uông Bí sits at 21.0°N, 106.8°E, 11 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Mạo Khê, 19 km away.

Topography around Thành Phố Uông Bí

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thành Phố Uông Bí.

Within 3 km, the terrain around Thành Phố Uông Bí has only modest variations in elevation — a maximum elevation change of 231 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,047 m; within 80 km, large variations in elevation — a maximum elevation change of 1,180 m.

The land around Thành Phố Uông Bí is covered by trees (41%) and artificial surfaces (24%) within 3 km, trees (55%) within 16 km, and trees (45%) and water (26%) within 80 km.

3 km
231 m
16 km
1,047 m
80 km
1,180 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
April weather nearby: Thị Trấn Mạo Khê 19 km · Haiphong 21 km · Thị Trấn Đông Triều 27 km · Kiến An 30 km · Ha Long 33 km · Đố Sơn 36 km · Chũ 43 km · Cát Bà 45 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 Thành Phố Uông Bí (21.0343°, 106.7705°, elevation 11 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).