Mường Lay weather in April

In April, Mường Lay sees average daytime highs of 28°C and overnight lows near 19°C, with 219 mm of rain across 19.5 wet days and about 12.5 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 33% of the time in April, and the air most often feels muggy.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 48 min by month's end. Set against the rest of the year, April is Mường Lay's 4th-clearest and 3rd-windiest month. For the whole year in context, see Mường Lay's year-round climate.

Daytime high
28°
6th warmest
Overnight low
19°
6th coldest
Rainfall
219 mm
19.5 wet days
Daylight
12 h 30 min
5:52 AM – 6:23 PM
Cloud cover
56%
4th clearest
Wind
3 km/h
3rd windiest
Solar energy
5.2 kWh/m²
Travel score
4.7
out of 10

Mường Lay is old town of Dien Bien province, Vietnam.

Density
179/km²
people per km²
Founded
1971

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 29°C by the end.

A typical April day in Mường Lay reaches about 28°C in the afternoon and slips back to 19°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 33°C. Set against its neighbours, April runs about 2°C warmer than March and about 1°C cooler than May.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12717
22717
32717
42717
52818
62818
72818
82818
92818
102818
112818
122818
132818
142819
152819
162819
172819
182919
192919
202919
212919
222919
232919
242920
252920
262920
272920
282920
292920
302920

How April really feels in Mường Lay

Once humidity and wind are folded in, April averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mường Lay weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 12°59810.86.8
Feb23° / 12°548.311.27.1
Mar26° / 15°12313.111.86.3
Apr28° / 19°21919.512.54.7
May29° / 21°32825.2133.5
Jun29° / 23°45528.313.32.9
Jul29° / 23°45329.413.23.0
Aug29° / 23°36426.912.83.2
Sep29° / 22°18719.712.14.2
Oct27° / 20°8613.711.55.9
Nov24° / 16°55810.97.2
Dec21° / 13°476.210.77.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 21% of April, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25743
35743
45743
55842
65743
75842
85842
95743
105743
115743
125743
135644
145644
155545
165446
175446
185347
195248
205149
215149
225149
235050
245050
255050
265050
274951
284852
294852
304852

Chance of precipitation in April

Any precipitation

Mường Lay gets around 219 mm of rain over 19.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 65% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
158
258
358
458
558
658
759
859
959
1060
1160
1261
1361
1462
1563
1664
1765
1866
1967
2068
2169
2270
2371
2472
2572
2673
2773
2874
2974
3074

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the muggy band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 76% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
131140442
231038472
321036493
42934514
52832535
61831555
71729576
81628578
91626589
1015255910
1114246011
1214226112
1313216114
1413206115
1502196217
1602186218
1702166319
1802156221
1901146322
2001136323
2101126324
2201116325
2301106326
2401106227
250196228
260196030
270185932
280185833
290185635
300175537

Wind in April

Winds average 3 km/h in April.

Across April, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over April. Sunrise moves from 6:06 AM to 5:41 AM, and sunset from 6:18 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:066:18
212.26:056:18
312.26:056:18
412.36:046:19
512.36:036:19
612.36:026:19
712.36:016:20
812.36:006:20
912.45:596:20
1012.45:586:21
1112.45:576:21
1212.45:566:21
1312.45:556:22
1412.55:546:22
1512.55:536:23
1612.55:526:23
1712.55:526:23
1812.55:516:24
1912.65:506:24
2012.65:496:24
2112.65:486:25
2212.65:476:25
2312.65:476:25
2412.75:466:26
2512.75:456:26
2612.75:446:27
2712.75:446:27
2812.75:436:27
2912.85:426:28
3012.85:416:28

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.2 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.09 kWh/m² to a high of 5.2 kWh/m² in April across the year — April's 5.2 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Mường Lay

In seasonPeak

In April, Mường Lay sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Mường Lay's monsoon runs April–August, when most of the year's rain falls.

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

Is April a good time to visit Mường Lay?

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

4.7
Sightseeing
7th-best month of the year
5.4
Beach & pool
5th-best month of the year

April is a reasonable time to visit Mường Lay for sightseeing.

What to pack for Mường Lay in April

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

In April, Mường Lay sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Mường Lay in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Mường Lay peaks around June 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highVery highExtremeVery highHighJun 19UV 13Dec 19UV 6
UV index (midday)Level
Jan7High
Feb9Very high
Mar11Extreme
Apr9Very high
May11Extreme
Jun14Extreme
Jul13Extreme
Aug12Extreme
Sep10Very high
Oct9Very high
Nov8Very high
Dec6High

Air quality in Mường Lay in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Mường Lay is worst in April — around 99 µg/m³ PM2.5 (unhealthy), about 8.1× the cleanest month (July, 12 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyModerateApr 1395 µg/m³Jul 2212 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb41Poor
Mar73Unhealthy
Apr99Unhealthy
May32Moderate
Jun14Moderate
Jul12Moderate
Aug13Moderate
Sep17Moderate
Oct23Moderate
Nov26Moderate
Dec30Moderate
Location & terrain

Where is Mường Lay?

Mường Lay sits at 22.0°N, 103.1°E, 496 m above sea level, in Vietnam. The nearest listed city is Lai Châu, 55 km away.

Lào CaiÍt OngSơn LaThị Trấn Phố Lu

Topography around Mường Lay

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

Within 3 km, the terrain around Mường Lay has large variations in elevation — a maximum elevation change of 987 m around an average of 501 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,867 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,950 m.

The land around Mường Lay is covered by trees (78%) within 3 km, trees (80%) within 16 km, and trees (80%) within 80 km.

3 km
987 m
16 km
1,867 m
80 km
2,950 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Lai Châu 55 km · Dien Bien Phu 69 km · Sapa 82 km · Thị Trấn Thuận Châu 85 km · Lào Cai 102 km · Ít Ong 107 km · Sơn La 111 km · Thị Trấn Phố Lu 114 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 Mường Lay (22°, 103.1333°, elevation 496 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).