Hoàng Mai weather in May

In May, Hoàng Mai sees average daytime highs of 33°C and overnight lows near 26°C, with 115 mm of rain across 12.1 wet days and about 12.9 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 34°C by the end. The sky is clear or mostly clear about 16% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is Hoàng Mai's 6th-clearest and 8th-windiest month. For the whole year in context, see Hoàng Mai's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
26°
9th coldest
Rainfall
115 mm
12.1 wet days
Daylight
12 h 54 min
5:26 AM – 6:21 PM
Cloud cover
73%
6th clearest
Wind
11 km/h
8th windiest
Solar energy
5.72 kWh/m²
Travel score
3.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 32°C in the first days to 34°C by the end.

A typical May day in Hoàng Mai reaches about 33°C in the afternoon and slips back to 26°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 38°C. Set against its neighbours, May runs about 4°C warmer than April and about 2°C cooler than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63226
73226
83226
93226
103226
113326
123326
133326
143326
153326
163326
173326
183327
193327
203327
213327
223327
233427
243427
253427
263427
273427
283427
293427
303427
313428

How May really feels in Hoàng Mai

Once humidity and wind are folded in, May averages 31 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
31
21 feel dangerously hot (≥ 39°C)
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.

Hoàng Mai weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 16°234.9116.8
Feb22° / 17°153.911.37.1
Mar25° / 20°315.711.97.2
Apr29° / 23°47712.45.5
May33° / 26°11512.112.93.3
Jun35° / 28°12411.613.12.2
Jul35° / 28°17213.1132.4
Aug33° / 27°26320.112.72.6
Sep31° / 26°29319.412.13.4
Oct29° / 23°21916.311.65.0
Nov26° / 20°63911.16.7
Dec22° / 17°30510.97.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
33961
43961
53961
63961
73961
83862
93862
103763
113664
123664
133565
143565
153268
163268
173070
182971
192872
202773
212773
222575
232575
242377
252377
262377
272179
282179
292179
302179
312080

Chance of precipitation in May

Any precipitation

Hoàng Mai gets around 115 mm of rain over 12.1 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 39% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
132
233
334
434
534
635
736
836
937
1037
1138
1238
1339
1439
1540
1640
1740
1841
1941
2041
2142
2242
2342
2442
2542
2642
2742
2842
2942
3042
3142

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1393850
2393751
3293653
4283456
5283357
6283258
7273160
8273061
9273061
10273061
11263062
12263062
13163063
14163063
15163162
16163162
17153262
18153262
19153361
20153361
21143362
22143362
23143362
24143362
25133264
26133264
27133165
28123166
29023167
30023167
31023167

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 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 5:34 AM to 5:23 AM, and sunset from 6:15 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:346:15
212.75:336:15
312.75:326:16
412.75:326:16
512.85:316:16
612.85:316:17
712.85:306:17
812.85:306:18
912.85:296:18
1012.85:296:18
1112.85:286:19
1212.95:286:19
1312.95:276:19
1412.95:276:20
1512.95:276:20
1612.95:266:21
1712.95:266:21
1812.95:256:21
1912.95:256:22
2013.05:256:22
2113.05:256:23
2213.05:246:23
2313.05:246:23
2413.05:246:24
2513.05:246:24
2613.05:236:25
2713.05:236:25
2813.05:236:25
2913.05:236:26
3013.15:236:26
3113.15:236:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.72 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.67 kWh/m² to a high of 5.72 kWh/m² in May across the year — May's 5.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Hazard calendar for Hoàng Mai

In seasonPeak

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

Hoàng Mai sits in the Pacific typhoon belt; the season peaks July–October.

Hoàng Mai's monsoon runs July–October, 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 Hoàng Mai?

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

3.3
Sightseeing
9th-best month of the year
5.7
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Hoàng Mai.

What to pack for Hoàng Mai in May

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

In May, Hoàng Mai sees daytime highs around 33°C and nights near 26°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Hoàng Mai in May

The nearest coast averages about 28°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 21 km away) is warmest in August at about 30°C and coldest in February near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar22Refreshing
Apr24Warm
May28Warm
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Hoàng Mai 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 Hoàng Mai peaks around August 11 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 11UV 12Dec 15UV 6
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar10Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep10Extreme
Oct9Very high
Nov7High
Dec6High

Air quality in Hoàng Mai 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 Hoàng Mai is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 3.3× the cleanest month (July, 20 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyApr 1065 µg/m³Jul 1920 µg/m³
PM2.5 (µg/m³)Level
Jan65Unhealthy
Feb63Unhealthy
Mar63Unhealthy
Apr65Unhealthy
May43Poor
Jun25Moderate
Jul20Moderate
Aug23Moderate
Sep33Moderate
Oct46Poor
Nov55Poor
Dec64Unhealthy
Location & terrain

Where is Hoàng Mai?

Hoàng Mai sits at 19.3°N, 105.7°E, 6 m above sea level, in Vietnam. The nearest listed city is Nghi Sơn, 13 km away.

Topography around Hoàng Mai

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

Within 3 km, the terrain around Hoàng Mai has only modest variations in elevation — a maximum elevation change of 211 m around an average of 16 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 420 m; within 80 km, large variations in elevation — a maximum elevation change of 1,079 m.

The land around Hoàng Mai is covered by trees (41%) and cropland (25%) within 3 km, trees (42%) and water (31%) within 16 km, and trees (46%) and water (33%) within 80 km.

3 km
211 m
16 km
420 m
80 km
1,079 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Nghi Sơn 13 km · Diễn Thành 35 km · Sầm Sơn 55 km · Thanh Hóa 59 km · Kim Liên 60 km · Vinh 66 km · Yên Vinh 67 km · Nghi Xuân 68 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 Hoàng Mai (19.2676°, 105.7159°, elevation 6 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).