Thanh Hóa weather in May

In May, Thanh Hóa sees average daytime highs of 32°C and overnight lows near 26°C, with 167 mm of rain across 14.6 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 31°C in the first days to 33°C by the end. The sky is clear or mostly clear about 12% 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 Thanh Hóa's 7th-clearest and 5th-windiest month. For the whole year in context, see Thanh Hóa's year-round climate.

Daytime high
32°
3rd warmest
Overnight low
26°
9th coldest
Rainfall
167 mm
14.6 wet days
Daylight
12 h 54 min
5:25 AM – 6:21 PM
Cloud cover
75%
7th clearest
Wind
10 km/h
5th windiest
Solar energy
5.42 kWh/m²
Travel score
3.4
out of 10

Thanh Hóa is capital city of Thanh Hóa province.

Density
5,791/km²
people per km²
Founded
1994

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 31°C in the first days to 33°C by the end.

A typical May day in Thanh Hóa reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 37°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)
13125
23125
33125
43125
53125
63125
73225
83225
93225
103225
113226
123226
133226
143226
153226
163226
173226
183226
193226
203326
213326
223326
233326
243326
253326
263327
273327
283327
293327
303327
313327

How May really feels in Thanh Hóa

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
16 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.

Thanh Hóa 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° / 15°265.410.96.7
Feb22° / 17°153.511.37.1
Mar25° / 19°335.511.97.2
Apr29° / 23°577.212.45.8
May32° / 26°16714.612.93.4
Jun34° / 28°16713.813.22.5
Jul33° / 28°20616.313.12.6
Aug32° / 27°30921.712.72.7
Sep31° / 25°28920.612.13.3
Oct29° / 23°18015.111.55.1
Nov26° / 20°598.311.16.9
Dec22° / 16°265.110.87.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 73%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23367
33466
43466
53466
63466
73565
83565
93367
103367
113268
123268
133268
143070
153070
162872
172773
182674
192575
202377
212377
222278
232179
242179
252080
261981
271882
281882
291882
301783
311783

Chance of precipitation in May

Any precipitation

Thanh Hóa gets around 167 mm of rain over 14.6 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 47% and peaks near 53% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
134
236
337
438
539
640
741
842
943
1044
1145
1246
1347
1447
1548
1648
1749
1849
1949
2050
2150
2250
2351
2451
2552
2652
2753
2853
2953
3053
3153

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 70% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
13103057
23102958
3392860
4292762
5282664
6282664
7272566
8272467
9272467
10262369
11262369
12262270
13262270
14262270
15262270
16262270
17152271
18152272
19152272
20152272
21152272
22152272
23142174
24142174
25142075
26142075
27131977
28131878
29021880
30021781
31021682

Wind in May

Winds average 10 km/h in May.

Across May, 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.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 5:33 AM to 5:21 AM, and sunset from 6:16 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:336:16
212.75:326:16
312.75:326:16
412.85:316:17
512.85:306:17
612.85:306:17
712.85:296:18
812.85:296:18
912.85:286:18
1012.95:286:19
1112.95:276:19
1212.95:276:20
1312.95:266:20
1412.95:266:20
1512.95:266:21
1612.95:256:21
1712.95:256:22
1813.05:246:22
1913.05:246:22
2013.05:246:23
2113.05:236:23
2213.05:236:24
2313.05:236:24
2413.05:236:24
2513.05:226:25
2613.15:226:25
2713.15:226:26
2813.15:226:26
2913.15:226:26
3013.15:216:27
3113.15:216:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.42 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 5.47 kWh/m² in June across the year — May's 5.42 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Thanh Hóa

In seasonPeak

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

Thanh Hóa sits in the Pacific typhoon belt; the season peaks July–October.

Thanh Hóa's monsoon runs May–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 Thanh Hóa?

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

3.4
Sightseeing
8th-best month of the year
5.5
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Thanh Hóa.

What to pack for Thanh Hóa in May

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

In May, Thanh Hóa sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Thanh Hóa 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 23 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
Mar21Refreshing
Apr24Refreshing
May28Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Thanh Hóa in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Thanh Hóa peaks around August 14 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 14UV 12Dec 15UV 6
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar10Very high
Apr9Very high
May9Very high
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep10Very high
Oct9Very high
Nov7High
Dec6High

Air quality in Thanh Hóa 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 Thanh Hóa 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 Thanh Hóa?

Thanh Hóa sits at 19.8°N, 105.8°E, 5 m above sea level, in Vietnam. The nearest listed city is Sầm Sơn, 16 km away.

Topography around Thanh Hóa

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

Within 3 km, the terrain around Thanh Hóa has only modest variations in elevation — a maximum elevation change of 76 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 271 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,521 m.

The land around Thanh Hóa is covered by artificial surfaces (55%) and trees (20%) within 3 km, cropland (51%) within 16 km, and trees (47%), water (26%) and cropland (21%) within 80 km.

3 km
76 m
16 km
271 m
80 km
1,521 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Sầm Sơn 16 km · Nga Sơn 31 km · Bỉm Sơn 32 km · Thị Trấn Lam Sơn 40 km · Nghi Sơn 53 km · Ninh Binh 56 km · Hoàng Mai 59 km · Nam Định 83 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 Thanh Hóa (19.8°, 105.7667°, elevation 5 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).