Vĩnh Yên weather in May

In May, Vĩnh Yên sees average daytime highs of 32°C and overnight lows near 25°C, with 201 mm of rain across 17.4 wet days and about 13 hours of daylight. It is the 4th-warmest and 4th-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 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 Vĩnh Yên's 6th-clearest and 3rd-windiest month. For the whole year in context, see Vĩnh Yên's year-round climate.

Daytime high
32°
4th warmest
Overnight low
25°
8th coldest
Rainfall
201 mm
17.4 wet days
Daylight
13 hours
5:23 AM – 6:24 PM
Cloud cover
75%
6th clearest
Wind
6 km/h
3rd windiest
Solar energy
4.64 kWh/m²
Travel score
3.2
out of 10

Vĩnh Yên is provincial city of Vietnam.

Density
2,345/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 31°C in the first days to 33°C by the end.

A typical May day in Vĩnh Yên reaches about 32°C in the afternoon and slips back to 25°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 36°C. Set against its neighbours, May runs about 3°C warmer than April and about 1°C cooler than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63125
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213226
223226
233226
243226
253226
263326
273326
283326
293326
303326
313326

How May really feels in Vĩnh Yên

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
10 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.

Vĩnh Yên weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 15°378.310.86.2
Feb22° / 16°267.911.36.5
Mar25° / 19°4810.411.86.4
Apr29° / 22°8110.712.55.2
May32° / 25°20117.4133.2
Jun33° / 27°21518.213.32.4
Jul33° / 27°25120.513.22.4
Aug33° / 26°31122.112.72.5
Sep32° / 25°20117.912.13.3
Oct29° / 23°10010.511.55.4
Nov26° / 19°486.7117.2
Dec22° / 16°296.510.77.1

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 13% of May, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33169
43169
53169
63169
73169
83169
93169
103169
112971
122971
132872
142773
152773
162575
172575
182575
192377
202377
212179
222179
232080
242080
251981
261981
271882
281783
291684
301585
311585

Chance of precipitation in May

Any precipitation

Vĩnh Yên gets around 201 mm of rain over 17.4 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 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
144
245
346
446
547
648
749
850
951
1052
1152
1253
1354
1456
1557
1657
1758
1859
1959
2060
2161
2261
2362
2462
2563
2663
2763
2863
2963
3063
3163

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 64% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
14153645
24153546
33143448
43143450
53133351
63133252
72123155
82123056
92112958
102112958
112102860
122102761
132102761
142102662
151102663
16192565
17192565
18192466
19182467
20182368
21182368
22172270
23072172
24062173
25062074
26051976
27051877
28041779
29031681
30031582
31021484

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 5:32 AM to 5:19 AM, and sunset from 6:18 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:326:18
212.85:316:18
312.85:306:19
412.85:306:19
512.85:296:20
612.95:286:20
712.95:286:20
812.95:276:21
912.95:276:21
1012.95:266:22
1112.95:266:22
1213.05:256:22
1313.05:256:23
1413.05:246:23
1513.05:246:24
1613.05:236:24
1713.05:236:25
1813.05:236:25
1913.15:226:26
2013.15:226:26
2113.15:226:26
2213.15:216:27
2313.15:216:27
2413.15:216:28
2513.15:206:28
2613.15:206:29
2713.25:206:29
2813.25:206:29
2913.25:206:30
3013.25:196:30
3113.25:196:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.64 kWh/m².

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 4.78 kWh/m² in June across the year — May's 4.64 kWh/m² sits near the top of that range.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Hazard calendar for Vĩnh Yên

In seasonPeak

In May, Vĩnh Yên sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Vĩnh Yên's monsoon runs May–September, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Vĩnh Yên?

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

3.2
Sightseeing
9th-best month of the year
5.2
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Vĩnh Yên.

What to pack for Vĩnh Yên in May

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

In May, Vĩnh Yên sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in Vĩnh Yên in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Vĩnh Yên peaks around June 20 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highHighVery highExtremeVery highVery highHighJun 20UV 11Nov 21UV 6
UV index (midday)Level
Jan6High
Feb7High
Mar9Very high
Apr6High
May7Very high
Jun11Extreme
Jul10Extreme
Aug9Very high
Sep7High
Oct8Very high
Nov6High
Dec6High

Air quality in Vĩnh Yên 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 Vĩnh Yên is worst in December — around 171 µg/m³ PM2.5 (very unhealthy), about 3.4× the cleanest month (July, 50 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyPoorUnhealthyVery unhealthyDec 19170 µg/m³Jul 1452 µg/m³
PM2.5 (µg/m³)Level
Jan161Very unhealthy
Feb136Unhealthy
Mar122Unhealthy
Apr106Unhealthy
May76Unhealthy
Jun59Unhealthy
Jul50Poor
Aug68Unhealthy
Sep96Unhealthy
Oct125Unhealthy
Nov152Very unhealthy
Dec171Very unhealthy
Location & terrain

Where is Vĩnh Yên?

Vĩnh Yên sits at 21.3°N, 105.6°E, 19 m above sea level, in Vietnam. The nearest listed city is Phúc Yên, 13 km away.

Topography around Vĩnh Yên

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

Within 3 km, the terrain around Vĩnh Yên has only modest variations in elevation — a maximum elevation change of 137 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,044 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,694 m.

The land around Vĩnh Yên is covered by artificial surfaces (44%) and trees (28%) within 3 km, trees (39%) and cropland (38%) within 16 km, and trees (68%) and cropland (22%) within 80 km.

3 km
137 m
16 km
1,044 m
80 km
1,694 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Phúc Yên 13 km · Việt Trì 21 km · Sơn Tây 21 km · Quang Minh 22 km · Đan Phượng 25 km · Cổ Đô 25 km · Sóc Sơn 26 km · Thượng Cát 27 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 Vĩnh Yên (21.3089°, 105.6049°, elevation 19 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. 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).