Nghĩa Lộ weather in May

In May, Nghĩa Lộ sees average daytime highs of 27°C and overnight lows near 20°C, with 300 mm of rain across 23.6 wet days and about 13 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 11% of the time in May, and the air most often feels muggy.

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 Nghĩa Lộ's 9th-clearest and 1st-windiest month. For the whole year in context, see Nghĩa Lộ's year-round climate.

Daytime high
27°
4th warmest
Overnight low
20°
9th coldest
Rainfall
300 mm
23.6 wet days
Daylight
13 hours
5:27 AM – 6:29 PM
Cloud cover
77%
9th clearest
Wind
4 km/h
1st windiest
Solar energy
4.92 kWh/m²
Travel score
4.4
out of 10

Nghĩa Lộ is town in Yen Bai province, Vietnam.

Density
2,304/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

Day-to-day highs hold fairly steady near 27°C through the month.

A typical May day in Nghĩa Lộ reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, May runs about 2°C warmer than April and about 1°C cooler than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72619
82619
92719
102719
112720
122720
132720
142720
152720
162720
172720
182720
192720
202720
212720
222720
232720
242720
252720
262721
272721
282721
292721
302721
312721

Nghĩa Lộ 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
Jan16° / 10°7513.810.84.5
Feb18° / 11°711411.35.1
Mar21° / 14°13418.111.85.3
Apr25° / 17°19420.612.55.1
May27° / 20°30023.6134.4
Jun28° / 22°31825.213.33.8
Jul27° / 21°41326.413.23.8
Aug27° / 21°43928.112.73.7
Sep26° / 20°29023.412.14.4
Oct24° / 17°15317.511.55.6
Nov21° / 14°8312.4116.0
Dec17° / 11°6410.910.75.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 77%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23862
33862
43763
53763
63664
73565
83466
93367
103169
113070
122872
132674
142476
152377
162278
172080
181981
191783
201783
211585
221585
231387
241387
251288
261189
271090
281090
29991
30991
31991

Chance of precipitation in May

Any precipitation

Nghĩa Lộ gets around 300 mm of rain over 23.6 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 76% and peaks near 82% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
171
271
372
472
572
672
772
873
973
1073
1174
1274
1375
1475
1576
1676
1776
1877
1977
2078
2178
2279
2379
2479
2580
2681
2781
2881
2982
3082
3182

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11729612
21728622
31727623
41626643
51625644
61624654
71623655
81622656
91521676
101520677
111518688
121517689
1315166810
1415156910
1514147011
1614146912
1714136913
1814126914
1903127015
2003117016
2103116917
2203106918
2302106919
240296920
250286921
260286822
270176923
280176824
290166825
300166726
310156826

Wind in May

Winds average 4 km/h in May, the windiest month of the year.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

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 5:36 AM to 5:23 AM, and sunset from 6:23 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:366:23
212.85:356:23
312.85:346:23
412.85:346:24
512.95:336:24
612.95:326:25
712.95:326:25
812.95:316:26
912.95:316:26
1012.95:306:26
1113.05:306:27
1213.05:296:27
1313.05:296:28
1413.05:286:28
1513.05:286:29
1613.05:276:29
1713.05:276:29
1813.15:276:30
1913.15:266:30
2013.15:266:31
2113.15:256:31
2213.15:256:32
2313.15:256:32
2413.15:256:33
2513.15:246:33
2613.25:246:33
2713.25:246:34
2813.25:246:34
2913.25:236:35
3013.25:236:35
3113.25:236:36

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.92 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 4.92 kWh/m² in May across the year — May's 4.92 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Hazard calendar for Nghĩa Lộ

In seasonPeak

In May, Nghĩa Lộ sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Nghĩa Lộ's rainy season runs May–September, when most of the year's rain falls.

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

Is May a good time to visit Nghĩa Lộ?

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

4.4
Sightseeing
8th-best month of the year
4.4
Beach & pool
3rd-best month of the year

May is a reasonable time to visit Nghĩa Lộ for sightseeing.

What to pack for Nghĩa Lộ in May

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

In May, Nghĩa Lộ sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 24 days see rain.

rain gearlight clothessun protection

UV index in Nghĩa Lộ in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nghĩa Lộ peaks around June 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highExtremeVery highHighJun 20UV 14Dec 20UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar12Extreme
Apr9Very high
May11Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep9Very high
Oct9Very high
Nov8Very high
Dec6High

Air quality in Nghĩa Lộ 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 Nghĩa Lộ is worst in April — around 70 µg/m³ PM2.5 (unhealthy), about 4.5× the cleanest month (July, 16 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyModeratePoorApr 1169 µg/m³Jul 2016 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb48Poor
Mar64Unhealthy
Apr70Unhealthy
May34Moderate
Jun18Moderate
Jul16Moderate
Aug17Moderate
Sep23Moderate
Oct30Moderate
Nov37Poor
Dec42Poor
Location & terrain

Where is Nghĩa Lộ?

Nghĩa Lộ sits at 21.6°N, 104.5°E, 260 m above sea level, in Vietnam. The nearest listed city is Yên Bái, 43 km away.

Cổ Đô

Topography around Nghĩa Lộ

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

Within 3 km, the terrain around Nghĩa Lộ has only modest variations in elevation — a maximum elevation change of 242 m around an average of 279 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,218 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,909 m.

The land around Nghĩa Lộ is covered by cropland (41%) and trees (38%) within 3 km, trees (77%) within 16 km, and trees (80%) within 80 km.

3 km
242 m
16 km
2,218 m
80 km
2,909 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Yên Bái 43 km · Ít Ong 51 km · Sơn La 69 km · Tuyên Quang 76 km · Phú Thọ 76 km · Thị Trấn Phố Lu 87 km · Thị Trấn Thuận Châu 87 km · Cổ Đô 95 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 Nghĩa Lộ (21.6°, 104.5167°, elevation 260 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).