Sapa weather in August

In August, Sapa sees average daytime highs of 27°C and overnight lows near 21°C, with 385 mm of rain across 28.7 wet days and about 12.8 hours of daylight. It is the 1st-warmest and 2nd-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 4% of the time in August, and the air most often feels muggy.

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 Sapa's 10th-clearest and 12th-windiest month. For the whole year in context, see Sapa's year-round climate.

Daytime high: 27°; 1st warmest
Overnight low: 21°; 10th coldest
Rainfall: 385 mm; 28.7 wet days
Daylight: 12 h 48 min; 5:45 AM – 6:32 PM
Cloud cover: 85%; 10th clearest
Wind: 3 km/h; 12th windiest
Solar energy: 4.27 kWh/m²
Travel score: 3.6; out of 10

← July Sapa year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Sapa reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, August runs on par with July and on par with September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

Sapa weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	18° / 10°	82	12.4	10.8	5.3
Feb	19° / 11°	73	13	11.2	5.6
Mar	23° / 14°	132	16.9	11.8	5.8
Apr	25° / 17°	177	21.7	12.5	5.0
May	27° / 20°	236	25.8	13.1	4.1
Jun	27° / 21°	344	28.9	13.3	3.4
Jul	27° / 21°	396	29.7	13.2	3.4
Aug	27° / 21°	385	28.7	12.8	3.6
Sep	26° / 20°	202	22.4	12.1	4.5
Oct	24° / 18°	108	17.4	11.5	5.7
Nov	22° / 14°	61	10.3	10.9	6.4
Dec	18° / 11°	63	10	10.7	5.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 10% of August, with mostly cloudy or overcast conditions the remaining 85%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	12	12	12	10	10	10	10	10	10	10	10	10	11	12	13	14	14	15	15	16	16	17	18	19	20	21	21	21	22	21	21
Cloudier (%)	88	88	88	90	90	90	90	90	90	90	90	90	89	88	87	86	86	85	85	84	84	83	82	81	80	79	79	79	78	79	79

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	10	90
5	10	90
6	10	90
7	10	90
8	10	90
9	10	90
10	10	90
11	10	90
12	10	90
13	11	89
14	12	88
15	13	87
16	14	86
17	14	86
18	15	85
19	15	85
20	16	84
21	16	84
22	17	83
23	18	82
24	19	81
25	20	80
26	21	79
27	21	79
28	21	79
29	22	78
30	21	79
31	21	79

Chance of precipitation in August

Any precipitation

Sapa gets around 385 mm of rain over 28.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 92% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	95	95	95	95	95	95	95	95	95	95	95	94	94	94	93	93	93	92	92	91	91	90	90	89	89	88	88	87	87	86	86

	Rain chance (%)
1	95
2	95
3	95
4	95
5	95
6	95
7	95
8	95
9	95
10	95
11	95
12	94
13	94
14	94
15	93
16	93
17	93
18	92
19	92
20	91
21	91
22	90
23	90
24	89
25	89
26	88
27	88
28	87
29	87
30	86
31	86

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Humid (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	2	2
Muggy (%)	64	64	63	63	63	62	62	62	63	63	64	65	65	66	67	69	70	71	71	72	73	73	74	75	75	75	76	76	76	75	76
Oppressive (%)	36	36	37	37	37	38	38	38	37	37	36	35	35	34	33	31	30	29	28	27	26	26	25	24	24	24	23	23	23	23	22

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	64	36
2	0	64	36
3	0	63	37
4	0	63	37
5	0	63	37
6	0	62	38
7	0	62	38
8	0	62	38
9	0	63	37
10	0	63	37
11	0	64	36
12	0	65	35
13	0	65	35
14	0	66	34
15	0	67	33
16	0	69	31
17	0	70	30
18	0	71	29
19	1	71	28
20	1	72	27
21	1	73	26
22	1	73	26
23	1	74	25
24	1	75	24
25	1	75	24
26	1	75	24
27	1	76	23
28	1	76	23
29	1	76	23
30	2	75	23
31	2	76	22

Wind in August

Winds average 3 km/h in August, the calmest month.

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	3	calm
2	3	calm
3	3	calm
4	3	calm
5	3	calm
6	3	calm
7	3	calm
8	3	calm
9	3	calm
10	3	calm
11	3	calm
12	3	calm
13	3	calm
14	3	calm
15	3	calm
16	3	calm
17	3	calm
18	3	calm
19	3	calm
20	3	calm
21	3	calm
22	3	calm
23	3	calm
24	3	calm
25	3	calm
26	3	calm
27	3	calm
28	3	calm
29	3	calm
30	3	calm
31	3	calm

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 5:40 AM to 5:50 AM, and sunset from 6:42 PM to 6:19 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.0	13.0	13.0	13.0	13.0	13.0	12.9	12.9	12.9	12.9	12.9	12.9	12.8	12.8	12.8	12.8	12.8	12.7	12.7	12.7	12.7	12.7	12.6	12.6	12.6	12.6	12.6	12.5	12.5	12.5	12.5
Sunrise (AM)	5:40	5:40	5:40	5:41	5:41	5:42	5:42	5:42	5:43	5:43	5:44	5:44	5:44	5:45	5:45	5:45	5:46	5:46	5:47	5:47	5:47	5:48	5:48	5:48	5:49	5:49	5:49	5:50	5:50	5:50	5:50
Sunset (PM)	6:42	6:41	6:41	6:40	6:40	6:39	6:38	6:38	6:37	6:36	6:36	6:35	6:34	6:34	6:33	6:32	6:31	6:30	6:30	6:29	6:28	6:27	6:26	6:25	6:24	6:24	6:23	6:22	6:21	6:20	6:19

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.0	5:40	6:42
2	13.0	5:40	6:41
3	13.0	5:40	6:41
4	13.0	5:41	6:40
5	13.0	5:41	6:40
6	13.0	5:42	6:39
7	12.9	5:42	6:38
8	12.9	5:42	6:38
9	12.9	5:43	6:37
10	12.9	5:43	6:36
11	12.9	5:44	6:36
12	12.9	5:44	6:35
13	12.8	5:44	6:34
14	12.8	5:45	6:34
15	12.8	5:45	6:33
16	12.8	5:45	6:32
17	12.8	5:46	6:31
18	12.7	5:46	6:30
19	12.7	5:47	6:30
20	12.7	5:47	6:29
21	12.7	5:47	6:28
22	12.7	5:48	6:27
23	12.6	5:48	6:26
24	12.6	5:48	6:25
25	12.6	5:49	6:24
26	12.6	5:49	6:24
27	12.6	5:49	6:23
28	12.5	5:50	6:22
29	12.5	5:50	6:21
30	12.5	5:50	6:20
31	12.5	5:50	6:19

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.27 kWh/m².

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 5.08 kWh/m² in April across the year — August's 4.27 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.3	4.3	4.3	4.3	4.3	4.3	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.2	Bright
3	4.2	Bright
4	4.2	Bright
5	4.2	Bright
6	4.2	Bright
7	4.2	Bright
8	4.2	Bright
9	4.2	Bright
10	4.2	Bright
11	4.2	Bright
12	4.2	Bright
13	4.2	Bright
14	4.2	Bright
15	4.2	Bright
16	4.3	Bright
17	4.3	Bright
18	4.3	Bright
19	4.3	Bright
20	4.3	Bright
21	4.3	Bright
22	4.4	Bright
23	4.4	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.4	Bright
31	4.4	Bright

Planning a trip in August

Hazard calendar for Sapa

In seasonPeak

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

Sapa'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 August a good time to visit Sapa?

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

3.7

Beach & pool

7th-best month of the year

August is a weaker month for outdoor sightseeing in Sapa.

What to pack for Sapa in August

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

In August, Sapa sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Sapa 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 Sapa 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	6	8	11	8	10	14	13	12	10	8	7	5
Level	High	Very high	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	Very high	High	High

	UV index (midday)	Level
Jan	6	High
Feb	8	Very high
Mar	11	Extreme
Apr	8	Very high
May	10	Very high
Jun	14	Extreme
Jul	13	Extreme
Aug	12	Extreme
Sep	10	Very high
Oct	8	Very high
Nov	7	High
Dec	5	High

Air quality in Sapa 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 Sapa is worst in April — around 70 µg/m³ PM2.5 (unhealthy), about 5.0× the cleanest month (July, 14 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	25	33	54	70	28	15	14	15	18	22	23	25
Level	Moderate	Moderate	Poor	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	25	Moderate
Feb	33	Moderate
Mar	54	Poor
Apr	70	Unhealthy
May	28	Moderate
Jun	15	Moderate
Jul	14	Moderate
Aug	15	Moderate
Sep	18	Moderate
Oct	22	Moderate
Nov	23	Moderate
Dec	25	Moderate

Location & terrain

Where is Sapa?

Sapa sits at 22.3°N, 103.8°E, 0 m above sea level, in Vietnam. The nearest listed city is Lào Cai, 21 km away.

Topography around Sapa

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

Within 3 km, the terrain around Sapa has large variations in elevation — a maximum elevation change of 957 m around an average of 1,481 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,006 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,050 m.

The land around Sapa is covered by trees (56%) and grassland (28%) within 3 km, trees (86%) within 16 km, and trees (84%) within 80 km.

3 km

957 m

trees 56%

16 km

3,006 m

trees 86%

80 km

3,050 m

trees 84%

treesgrasslandcroplandartificial surfacesbare terrainwater

← July Sapa year-round climate September →Best places to visit in August

August weather nearby: Lào Cai 21 km · Thị Trấn Phố Lu 35 km · Lai Châu 40 km · Mường Lay 82 km · Ít Ong 93 km · Thị Trấn Việt Quang 99 km · Thị Trấn Thuận Châu 102 km · Bắc Quang 106 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

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 Sapa (22.3402°, 103.8441°, elevation 0 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).

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	10	90
5	10	90
6	10	90
7	10	90
8	10	90
9	10	90
10	10	90
11	10	90
12	10	90
13	11	89
14	12	88
15	13	87
16	14	86
17	14	86
18	15	85
19	15	85
20	16	84
21	16	84
22	17	83
23	18	82
24	19	81
25	20	80
26	21	79
27	21	79
28	21	79
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	95
2	95
3	95
4	95
5	95
6	95
7	95
8	95
9	95
10	95
11	95
12	94
13	94
14	94
15	93
16	93
17	93
18	92
19	92
20	91
21	91
22	90
23	90
24	89
25	89
26	88
27	88
28	87
29	87
30	86
31	86

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	64	36
2	0	64	36
3	0	63	37
4	0	63	37
5	0	63	37
6	0	62	38
7	0	62	38
8	0	62	38
9	0	63	37
10	0	63	37
11	0	64	36
12	0	65	35
13	0	65	35
14	0	66	34
15	0	67	33
16	0	69	31
17	0	70	30
18	0	71	29
19	1	71	28
20	1	72	27
21	1	73	26
22	1	73	26
23	1	74	25
24	1	75	24
25	1	75	24
26	1	75	24
27	1	76	23
28	1	76	23
29	1	76	23
30	2	75	23
31	2	76	22

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	10	90
5	10	90
6	10	90
7	10	90
8	10	90
9	10	90
10	10	90
11	10	90
12	10	90
13	11	89
14	12	88
15	13	87
16	14	86
17	14	86
18	15	85
19	15	85
20	16	84
21	16	84
22	17	83
23	18	82
24	19	81
25	20	80
26	21	79
27	21	79
28	21	79
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	95
2	95
3	95
4	95
5	95
6	95
7	95
8	95
9	95
10	95
11	95
12	94
13	94
14	94
15	93
16	93
17	93
18	92
19	92
20	91
21	91
22	90
23	90
24	89
25	89
26	88
27	88
28	87
29	87
30	86
31	86

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	64	36
2	0	64	36
3	0	63	37
4	0	63	37
5	0	63	37
6	0	62	38
7	0	62	38
8	0	62	38
9	0	63	37
10	0	63	37
11	0	64	36
12	0	65	35
13	0	65	35
14	0	66	34
15	0	67	33
16	0	69	31
17	0	70	30
18	0	71	29
19	1	71	28
20	1	72	27
21	1	73	26
22	1	73	26
23	1	74	25
24	1	75	24
25	1	75	24
26	1	75	24
27	1	76	23
28	1	76	23
29	1	76	23
30	2	75	23
31	2	76	22

	Avg high (°C)	Avg low (°C)
1	27	21
2	27	21
3	27	21
4	27	21
5	27	21
6	27	21
7	27	21
8	27	21
9	27	21
10	27	21
11	27	21
12	27	21
13	27	21
14	27	21
15	27	21
16	27	21
17	27	21
18	27	21
19	27	21
20	27	21
21	27	21
22	27	21
23	27	21
24	27	21
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	27	21
31	27	21

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	10	90
5	10	90
6	10	90
7	10	90
8	10	90
9	10	90
10	10	90
11	10	90
12	10	90
13	11	89
14	12	88
15	13	87
16	14	86
17	14	86
18	15	85
19	15	85
20	16	84
21	16	84
22	17	83
23	18	82
24	19	81
25	20	80
26	21	79
27	21	79
28	21	79
29	22	78
30	21	79
31	21	79

	Rain chance (%)
1	95
2	95
3	95
4	95
5	95
6	95
7	95
8	95
9	95
10	95
11	95
12	94
13	94
14	94
15	93
16	93
17	93
18	92
19	92
20	91
21	91
22	90
23	90
24	89
25	89
26	88
27	88
28	87
29	87
30	86
31	86

	Humid (%)	Muggy (%)	Oppressive (%)
1	0	64	36
2	0	64	36
3	0	63	37
4	0	63	37
5	0	63	37
6	0	62	38
7	0	62	38
8	0	62	38
9	0	63	37
10	0	63	37
11	0	64	36
12	0	65	35
13	0	65	35
14	0	66	34
15	0	67	33
16	0	69	31
17	0	70	30
18	0	71	29
19	1	71	28
20	1	72	27
21	1	73	26
22	1	73	26
23	1	74	25
24	1	75	24
25	1	75	24
26	1	75	24
27	1	76	23
28	1	76	23
29	1	76	23
30	2	75	23
31	2	76	22