Cẩm Phả weather in May

In May, Cẩm Phả sees average daytime highs of 28°C and overnight lows near 25°C, with 200 mm of rain across 17.5 wet days and about 13 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 19% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 12 min by month's end. Set against the rest of the year, May is Cẩm Phả's 6th-clearest and 7th-windiest month. For the whole year in context, see Cẩm Phả's year-round climate.

Daytime high
28°
5th warmest
Overnight low
25°
8th coldest
Rainfall
200 mm
17.5 wet days
Daylight
13 hours
5:17 AM – 6:17 PM
Cloud cover
71%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
5.16 kWh/m²
Travel score
5.0
out of 10

Cẩm Phả is city in Quảng Ninh province, Vietnam.

Density
391/km²
people per km²
Founded
2012

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 29°C by the end.

A typical May day in Cẩm Phả reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, May runs about 3°C warmer than April and about 2°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12624
22624
32724
42724
52724
62724
72724
82725
92725
102725
112725
122725
132825
142825
152825
162825
172825
182825
192825
202825
212826
222826
232826
242826
252826
262926
272926
282926
292926
302926
312926

How May really feels in Cẩm Phả

Once humidity and wind are folded in, May averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Cẩm Phả weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 15°6111.410.95.5
Feb19° / 16°4410.511.35.6
Mar21° / 19°6412.111.95.9
Apr24° / 22°6510.312.56.5
May28° / 25°20017.5135.0
Jun30° / 27°28821.413.33.5
Jul30° / 27°37323.413.13.4
Aug30° / 27°43124.512.73.4
Sep29° / 26°29619.912.14.2
Oct27° / 24°12611.911.56.4
Nov24° / 21°598.9117.2
Dec20° / 17°487.710.76.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34258
44258
54357
64258
74159
84258
94159
104159
113961
123961
133763
143664
153565
163367
173268
183070
193070
202773
212773
222575
232476
242476
252278
262278
272278
282080
292080
301981
311882

Chance of precipitation in May

Any precipitation

Cẩm Phả gets around 200 mm of rain over 17.5 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 56% and peaks near 67% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
143
244
345
446
548
649
750
851
952
1052
1153
1254
1354
1455
1555
1656
1757
1857
1958
2059
2159
2260
2361
2462
2563
2663
2764
2865
2966
3066
3167

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
115154634
214144436
314144239
414134042
513133944
613123747
713123549
813113451
913113352
1013113253
1112103156
1212103057
1312102958
1412102958
151292959
161292959
171292959
180282961
190282862
200282862
210272764
220272764
230272665
240262567
250262468
260252370
270152272
280152173
290141976
300141877
310131779

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:25 AM to 5:13 AM, and sunset from 6:11 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:256:11
212.85:256:11
312.85:246:12
412.85:236:12
512.85:236:12
612.85:226:13
712.95:226:13
812.95:216:14
912.95:216:14
1012.95:206:15
1112.95:206:15
1212.95:196:15
1313.05:196:16
1413.05:186:16
1513.05:186:17
1613.05:176:17
1713.05:176:17
1813.05:166:18
1913.05:166:18
2013.15:166:19
2113.15:156:19
2213.15:156:20
2313.15:156:20
2413.15:156:21
2513.15:146:21
2613.15:146:21
2713.15:146:22
2813.15:146:22
2913.25:136:23
3013.25:136:23
3113.25:136:23

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.16 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 5.16 kWh/m² in May across the year — May's 5.16 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in May

Hazard calendar for Cẩm Phả

In seasonPeak

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

Cẩm Phả sits in the Pacific typhoon belt; the season peaks July–October.

Cẩm Phả'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 May a good time to visit Cẩm Phả?

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

5.0
Sightseeing
8th-best month of the year
5.5
Beach & pool
4th-best month of the year

May is a reasonable time to visit Cẩm Phả for sightseeing.

What to pack for Cẩm Phả in May

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

In May, Cẩm Phả sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Cẩm Phả in May

The nearest coast averages about 27°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 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 13 to Jan 10 — about 10 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb19Cool
Mar20Refreshing
Apr23Refreshing
May27Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov25Warm
Dec22Refreshing

UV index in Cẩm Phả in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cẩm Phả 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 Cẩm Phả in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cẩm Phả 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 Cẩm Phả?

Cẩm Phả sits at 21.0°N, 107.3°E, 20 m above sea level, in Vietnam. The nearest listed city is Cẩm Phả Mines, 3.0 km away.

Topography around Cẩm Phả

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

Within 3 km, the terrain around Cẩm Phả has significant variations in elevation — a maximum elevation change of 457 m around an average of 88 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,012 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,582 m.

The land around Cẩm Phả is covered by artificial surfaces (31%), trees (25%) and water (21%) within 3 km, trees (45%) and water (40%) within 16 km, and water (49%) and trees (42%) within 80 km.

3 km
457 m
16 km
1,012 m
80 km
1,582 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
May weather nearby: Cẩm Phả Mines 3.0 km · Ha Long 22 km · Thị Trấn Ba Chẽ 29 km · Thị Trấn Tiên Yên 38 km · Cát Bà 39 km · Thị Trấn Đầm Hà 51 km · Thành Phố Uông Bí 52 km · Đố Sơn 60 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 Cẩm Phả (21.01°, 107.2734°, elevation 20 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).