Mường Lay weather in July

In July, Mường Lay sees average daytime highs of 29°C and overnight lows near 23°C, with 453 mm of rain across 29.4 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 3% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 13 h 18 min at the start of July to 13 hours by month's end. Set against the rest of the year, July is Mường Lay's 11th-clearest and 9th-windiest month. For the whole year in context, see Mường Lay's year-round climate.

Daytime high
29°
4th warmest
Overnight low
23°
12th coldest
Rainfall
453 mm
29.4 wet days
Daylight
13 h 12 min
5:36 AM – 6:50 PM
Cloud cover
90%
11th clearest
Wind
2 km/h
9th windiest
Solar energy
3.92 kWh/m²
Travel score
3.0
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical July day in Mường Lay reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, July runs on par with June and on par with August.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12923
22923
32923
42923
52923
62923
72923
82923
92923
102923
112923
122923
132923
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282923
292923
302923
312923

How July really feels in Mường Lay

Once humidity and wind are folded in, July averages 11 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
11
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Mường Lay weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 2nd-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 6% of July, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2892
3991
4991
5991
6991
7991
8991
9892
10892
11892
12892
13892
14892
15892
16892
17892
18892
19892
20991
21991
22991
231090
241090
251189
261189
271189
281189
291189
301189
311189

Chance of precipitation in July

Any precipitation

Mường Lay gets around 453 mm of rain over 29.4 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 95% and peaks near 96% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
196
296
396
496
596
696
795
895
995
1095
1195
1295
1395
1495
1595
1695
1795
1895
1995
2095
2195
2295
2394
2494
2594
2694
2794
2894
2994
3094
3194

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
10973
20973
30973
41963
51972
61972
71972
81972
91972
101972
111972
121972
131972
141972
150982
160982
170982
180982
190982
200982
210982
220982
230982
240982
250973
260973
270973
280973
290973
300973
310973

Wind in July

Winds average 2 km/h in July.

Across July, daily wind ranges from about 2 km/h on the calmest days to 2 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
12calm
22calm
32calm
42calm
52calm
62calm
72calm
82calm
92calm
102calm
112calm
122calm
132calm
142calm
152calm
162calm
172calm
182calm
192calm
202calm
212calm
222calm
232calm
242calm
252calm
262calm
272calm
282calm
292calm
302calm
312calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 18 min at the start of July to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:31 AM to 5:43 AM, and sunset from 6:51 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:316:51
213.35:316:51
313.35:326:51
413.35:326:51
513.35:326:51
613.35:336:51
713.35:336:51
813.35:336:51
913.35:346:51
1013.35:346:51
1113.35:346:51
1213.35:356:50
1313.35:356:50
1413.25:366:50
1513.25:366:50
1613.25:366:50
1713.25:376:50
1813.25:376:49
1913.25:386:49
2013.25:386:49
2113.25:386:49
2213.25:396:48
2313.15:396:48
2413.15:406:48
2513.15:406:47
2613.15:406:47
2713.15:416:46
2813.15:416:46
2913.15:426:46
3013.05:426:45
3113.05:436:45

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 3.92 kWh/m².

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 — July's 3.92 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
234.0Moderate
244.0Moderate
254.0Moderate
264.0Bright
274.0Bright
284.0Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in July

Hazard calendar for Mường Lay

In seasonPeak

In July, 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 July a good time to visit Mường Lay?

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

3.0
Sightseeing
11th-best month of the year
3.7
Beach & pool
12th-best month of the year

July is a weaker month for outdoor sightseeing in Mường Lay.

What to pack for Mường Lay in July

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

In July, Mường Lay sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Mường Lay in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 13 (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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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
July 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).