Lào Cai weather in August

In August, Lào Cai sees average daytime highs of 30°C and overnight lows near 23°C, with 268 mm of rain across 22.4 wet days and about 12.8 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 10% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of August to 12 h 30 min by month's end. Set against the rest of the year, August is Lào Cai's 10th-clearest and 11th-windiest month. For the whole year in context, see Lào Cai's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
268 mm
22.4 wet days
Daylight
12 h 48 min
5:45 AM – 6:32 PM
Cloud cover
80%
10th clearest
Wind
3 km/h
11th windiest
Solar energy
4.41 kWh/m²
Travel score
3.6
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical August day in Lào Cai reaches about 30°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 26°C and 32°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
242923
252923
262923
272923
282923
292923
302923
312923

How August really feels in Lào Cai

Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Lào Cai weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 11°9618.110.84.7
Feb20° / 12°871711.25.0
Mar24° / 15°1261911.85.5
Apr27° / 19°12917.612.55.2
May29° / 22°20019.713.14.1
Jun30° / 24°2422213.43.3
Jul30° / 24°26123.213.23.4
Aug30° / 23°26822.412.83.6
Sep28° / 22°16518.212.14.6
Oct26° / 19°11816.611.55.7
Nov23° / 15°8813.810.96.1
Dec19° / 12°9214.110.65.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 11% of August, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31783
41783
51783
61783
71783
81783
91684
101684
111684
121882
131882
141882
152080
162080
172179
182278
192476
202476
212575
222674
232773
242773
252773
262773
272872
282872
292872
302872
312872

Chance of precipitation in August

Any precipitation

Lào Cai gets around 268 mm of rain over 22.4 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
176
275
375
475
575
674
774
874
974
1074
1174
1273
1373
1473
1572
1672
1772
1872
1971
2071
2171
2270
2370
2470
2570
2669
2769
2869
2969
3069
3168

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
102971
201981
301981
401981
501981
601981
701981
802971
902971
1002971
1103961
1203961
1304951
1405941
1505941
1606931
1707921
1808911
1909901
2009901
21010891
22010891
23011881
24012871
25012871
26013861
27113851
28114841
29115831
30115831
31116821

Wind in August

Winds average 3 km/h in August.

Across August, 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.

0246810151015202531
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
313calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 hours at the start of August to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over August. Sunrise moves from 5:39 AM to 5:50 AM, and sunset from 6:42 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:396:42
213.05:396:41
313.05:406:40
413.05:406:40
513.05:406:39
613.05:416:39
712.95:416:38
812.95:426:37
912.95:426:37
1012.95:426:36
1112.95:436:35
1212.95:436:35
1312.85:446:34
1412.85:446:33
1512.85:446:32
1612.85:456:32
1712.85:456:31
1812.75:456:30
1912.75:466:29
2012.75:466:28
2112.75:476:28
2212.75:476:27
2312.65:476:26
2412.65:486:25
2512.65:486:24
2612.65:486:23
2712.65:496:22
2812.55:496:21
2912.55:496:20
3012.55:506:19
3112.55:506:18

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 kWh/m².

For context, solar energy here swings from a low near 2.56 kWh/m² to a high of 4.91 kWh/m² in April across the year — August's 4.41 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.4Bright
Planning a trip in August

Hazard calendar for Lào Cai

In seasonPeak

In August, Lào Cai sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Lào Cai's rainy season runs March–September, when most of the year's rain falls.

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

Is August a good time to visit Lào Cai?

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

3.6
Sightseeing
10th-best month of the year
4.8
Beach & pool
5th-best month of the year

August is a weaker month for outdoor sightseeing in Lào Cai.

What to pack for Lào Cai in August

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

In August, Lào Cai sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 22 days see rain.

light clothesrain gear

UV index in Lào Cai in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Lào Cai peaks around June 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 21UV 13Dec 18UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar11Extreme
Apr8Very high
May10Very high
Jun14Extreme
Jul13Extreme
Aug12Extreme
Sep10Very high
Oct8Very high
Nov7High
Dec5High

Air quality in Lào Cai in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Lào Cai is worst in March — around 49 µg/m³ PM2.5 (poor), about 2.8× the cleanest month (July, 17 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 2349 µg/m³Jul 1817 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb40Poor
Mar49Poor
Apr48Poor
May30Moderate
Jun19Moderate
Jul17Moderate
Aug18Moderate
Sep23Moderate
Oct28Moderate
Nov33Moderate
Dec36Poor
Location & terrain

Where is Lào Cai?

Lào Cai sits at 22.5°N, 104.0°E, 86 m above sea level, in Vietnam. The nearest listed city is Sapa, 21 km away.

Bắc QuangMường LayÍt OngHà Giang

Topography around Lào Cai

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

Within 3 km, the terrain around Lào Cai has significant variations in elevation — a maximum elevation change of 298 m around an average of 141 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,148 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,050 m.

The land around Lào Cai is covered by trees (65%) and artificial surfaces (26%) within 3 km, trees (90%) within 16 km, and trees (85%) within 80 km.

3 km
298 m
16 km
2,148 m
80 km
3,050 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Sapa 21 km · Thị Trấn Phố Lu 29 km · Lai Châu 54 km · Thị Trấn Việt Quang 86 km · Bắc Quang 92 km · Mường Lay 102 km · Ít Ong 108 km · Hà Giang 111 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 Lào Cai (22.4856°, 103.9707°, elevation 86 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).