Đồng Hới weather in May

In May, Đồng Hới sees average daytime highs of 30°C and overnight lows near 26°C, with 112 mm of rain across 14.7 wet days and about 12.8 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 31°C by the end. The sky is clear or mostly clear about 18% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Đồng Hới's 6th-clearest and 11th-windiest month. For the whole year in context, see Đồng Hới's year-round climate.

Daytime high
30°
4th warmest
Overnight low
26°
9th coldest
Rainfall
112 mm
14.7 wet days
Daylight
12 h 48 min
5:25 AM – 6:14 PM
Cloud cover
71%
6th clearest
Wind
10 km/h
11th windiest
Solar energy
5.68 kWh/m²
Travel score
4.2
out of 10

Đồng Hới is capital of Quảng Bình province, Vietnam.

Density
859/km²
people per km²

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 29°C in the first days to 31°C by the end.

A typical May day in Đồng Hới reaches about 30°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, May runs about 2°C warmer than April and about 2°C cooler than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12925
22925
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153026
163026
173026
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283126
293126
303126
313127

How May really feels in Đồng Hới

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
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.

Đồng Hới weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 18°12517.411.15.2
Feb22° / 18°7713.811.45.8
Mar25° / 21°8213.311.96.2
Apr28° / 23°8812.812.45.6
May30° / 26°11214.712.84.2
Jun32° / 27°638.1133.9
Jul32° / 27°941012.93.9
Aug31° / 26°14613.512.63.9
Sep29° / 25°34519.612.13.9
Oct27° / 24°5312411.64.5
Nov25° / 21°36620.911.24.9
Dec22° / 19°22820.3114.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 68%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34555
44456
54258
64258
74159
84159
93961
103961
113763
123763
133565
143367
153367
163169
173070
182971
192773
202773
212773
222575
232575
242575
252476
262476
272476
282476
292476
302377
312377

Chance of precipitation in May

Any precipitation

Đồng Hới gets around 112 mm of rain over 14.7 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 51% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
148
248
348
449
550
650
751
851
951
1051
1151
1251
1351
1451
1551
1650
1750
1849
1948
2047
2146
2245
2344
2443
2542
2641
2740
2839
2938
3037
3136

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1174448
2174350
3164152
4164053
5063955
6063757
7053659
8153559
9153460
10153460
11153361
12153361
13153361
14153460
15153460
16153559
17153658
18143758
19143857
20143956
21144055
22144154
23044155
24044254
25034255
26034354
27034354
28034354
29024454
30024454
31024553

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2712calm
2812calm
2912calm
3012light breeze
3112light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:32 AM to 5:22 AM, and sunset from 6:09 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:326:09
212.65:316:10
312.75:316:10
412.75:306:10
512.75:306:11
612.75:296:11
712.75:296:11
812.75:286:12
912.75:286:12
1012.75:286:12
1112.85:276:13
1212.85:276:13
1312.85:266:13
1412.85:266:14
1512.85:266:14
1612.85:256:14
1712.85:256:15
1812.85:256:15
1912.85:246:15
2012.95:246:16
2112.95:246:16
2212.95:246:16
2312.95:236:17
2412.95:236:17
2512.95:236:17
2612.95:236:18
2712.95:236:18
2812.95:226:19
2912.95:226:19
3013.05:226:19
3113.05:226:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.68 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.68 kWh/m² in May across the year — May's 5.68 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
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
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Hazard calendar for Đồng Hới

In seasonPeak

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

Đồng Hới sits in the Pacific typhoon belt; the season peaks July–October.

Đồng Hới's monsoon runs September–November, 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 Đồng Hới?

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

4.2
Sightseeing
8th-best month of the year
5.9
Beach & pool
4th-best month of the year

May is a reasonable time to visit Đồng Hới for sightseeing.

What to pack for Đồng Hới in May

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

In May, Đồng Hới sees daytime highs around 30°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 Đồng Hới 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 17 km away) is warmest in August at about 30°C and coldest in February near 22°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar23Refreshing
Apr25Warm
May28Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec24Refreshing

UV index in Đồng Hới in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Đồng Hới peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 12UV 13Dec 16UV 6
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar9Very high
Apr9Very high
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec6High

Air quality in Đồng Hới 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 Đồng Hới is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (July, 13 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 1064 µg/m³Jul 1514 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb26Moderate
Mar62Unhealthy
Apr65Unhealthy
May21Moderate
Jun14Moderate
Jul13Moderate
Aug14Moderate
Sep16Moderate
Oct20Moderate
Nov18Moderate
Dec21Moderate
Location & terrain

Where is Đồng Hới?

Đồng Hới sits at 17.5°N, 106.6°E, 9 m above sea level, in Vietnam. The nearest listed city is Quán Hàu, 7.0 km away.

thị xã Quảng TrịHà Tĩnh

Topography around Đồng Hới

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

Within 3 km, the terrain around Đồng Hới has only modest variations in elevation — a maximum elevation change of 22 m around an average of 4 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 711 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,630 m.

The land around Đồng Hới is covered by artificial surfaces (38%) and water (29%) within 3 km, water (45%) and trees (29%) within 16 km, and trees (61%) and water (32%) within 80 km.

3 km
22 m
16 km
711 m
80 km
1,630 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Quán Hàu 7.0 km · Hoàn Lão 16 km · Ba Đồn 38 km · Kỳ Anh 74 km · Cam Lộ 83 km · Ðông Hà 89 km · thị xã Quảng Trị 100 km · Hà Tĩnh 123 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 Đồng Hới (17.4688°, 106.6223°, elevation 9 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).