San Luis weather in August

In August, San Luis sees average daytime highs of 18°C and overnight lows near 6°C, with 15 mm of precipitation across 2.6 wet days and about 10.8 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 64% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 18 min at the start of August to 11 h 12 min by month's end. Set against the rest of the year, August is San Luis's 1st-clearest and 5th-windiest month. For the whole year in context, see San Luis's year-round climate.

Daytime high: 18°; 10th warmest
Overnight low: 6°; 3rd coldest
Precipitation: 15 mm; 2.6 wet days
Daylight: 10 h 48 min; 8:07 AM – 6:52 PM
Cloud cover: 33%; 1st clearest
Wind: 11 km/h; 5th windiest
Solar energy: 4.06 kWh/m²
Travel score: 7.4; out of 10

San Luis is capital city of the San Luis Province in the Cuyo region of Argentina.

Founded: 1594

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

← July San Luis 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

Highs climb over the month, from about 17°C in the first days to 20°C by the end.

A typical August day in San Luis reaches about 18°C in the afternoon and slips back to 6°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 26°C. Set against its neighbours, August runs about 3°C warmer than July and about 3°C cooler than 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)	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	19	19	20	20	20	20	20
Avg low (°C)	4	4	4	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	7	7	7

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

San Luis weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 18°	107	13.3	14	5.3
Feb	28° / 17°	81	10.9	13.2	6.3
Mar	26° / 15°	80	10.1	12.3	7.1
Apr	22° / 11°	53	7	11.2	7.4
May	18° / 8°	25	4.2	10.3	6.8
Jun	16° / 5°	8	1.9	9.8	6.3
Jul	16° / 4°	9	2.1	10	6.1
Aug	18° / 6°	15	2.6	10.8	7.4
Sep	21° / 9°	30	4.6	11.8	7.6
Oct	24° / 12°	66	8.7	12.8	7.5
Nov	26° / 14°	89	11.7	13.7	6.7
Dec	28° / 17°	102	13.1	14.2	5.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 24%.

	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 (%)	78	78	78	78	78	78	77	77	77	77	77	77	77	77	76	76	75	75	75	75	76	76	76	76	76	76	76	76	75	75	75
Cloudier (%)	22	22	22	22	22	22	23	23	23	23	23	23	23	23	24	24	25	25	25	25	24	24	24	24	24	24	24	24	25	25	25

	Clearer (%)	Cloudier (%)
1	78	22
2	78	22
3	78	22
4	78	22
5	78	22
6	78	22
7	77	23
8	77	23
9	77	23
10	77	23
11	77	23
12	77	23
13	77	23
14	77	23
15	76	24
16	76	24
17	75	25
18	75	25
19	75	25
20	75	25
21	76	24
22	76	24
23	76	24
24	76	24
25	76	24
26	76	24
27	76	24
28	76	24
29	75	25
30	75	25
31	75	25

Chance of precipitation in August

Any precipitation

San Luis gets around 15 mm of rain and snow over 2.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 8% and peaks near 10% on the wettest days, and about 0 day brings snow.

	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 (%)	7	7	7	7	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	10	10	10	10

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

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in August

Winds average 11 km/h in August.

Across August, daily wind ranges from about 11 km/h on the calmest days to 12 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)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
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	11	calm
2	11	calm
3	11	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm
31	12	calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 18 min at the start of August to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over August. Sunrise moves from 8:21 AM to 7:48 AM, and sunset from 6:41 PM to 7:03 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)	10.3	10.4	10.4	10.4	10.4	10.5	10.5	10.5	10.5	10.6	10.6	10.6	10.7	10.7	10.7	10.8	10.8	10.8	10.8	10.9	10.9	10.9	11.0	11.0	11.0	11.1	11.1	11.1	11.2	11.2	11.2
Sunrise (AM)	8:21	8:20	8:20	8:19	8:18	8:17	8:16	8:15	8:14	8:13	8:12	8:11	8:10	8:09	8:08	8:07	8:06	8:04	8:03	8:02	8:01	8:00	7:58	7:57	7:56	7:55	7:53	7:52	7:51	7:49	7:48
Sunset (PM)	6:41	6:42	6:43	6:44	6:44	6:45	6:46	6:46	6:47	6:48	6:49	6:49	6:50	6:51	6:51	6:52	6:53	6:54	6:54	6:55	6:56	6:56	6:57	6:58	6:58	6:59	7:00	7:01	7:01	7:02	7:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.3	8:21	6:41
2	10.4	8:20	6:42
3	10.4	8:20	6:43
4	10.4	8:19	6:44
5	10.4	8:18	6:44
6	10.5	8:17	6:45
7	10.5	8:16	6:46
8	10.5	8:15	6:46
9	10.5	8:14	6:47
10	10.6	8:13	6:48
11	10.6	8:12	6:49
12	10.6	8:11	6:49
13	10.7	8:10	6:50
14	10.7	8:09	6:51
15	10.7	8:08	6:51
16	10.8	8:07	6:52
17	10.8	8:06	6:53
18	10.8	8:04	6:54
19	10.8	8:03	6:54
20	10.9	8:02	6:55
21	10.9	8:01	6:56
22	10.9	8:00	6:56
23	11.0	7:58	6:57
24	11.0	7:57	6:58
25	11.0	7:56	6:58
26	11.1	7:55	6:59
27	11.1	7:53	7:00
28	11.1	7:52	7:01
29	11.2	7:51	7:01
30	11.2	7:49	7:02
31	11.2	7:48	7:03

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.06 kWh/m².

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 7.59 kWh/m² in December across the year — August's 4.06 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)	3.6	3.6	3.6	3.6	3.7	3.7	3.8	3.8	3.8	3.9	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.4	4.5	4.5	4.5	4.6
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.6	Moderate
2	3.6	Moderate
3	3.6	Moderate
4	3.6	Moderate
5	3.7	Moderate
6	3.7	Moderate
7	3.8	Moderate
8	3.8	Moderate
9	3.8	Moderate
10	3.9	Moderate
11	3.9	Moderate
12	3.9	Moderate
13	4.0	Moderate
14	4.0	Moderate
15	4.0	Bright
16	4.1	Bright
17	4.1	Bright
18	4.1	Bright
19	4.2	Bright
20	4.2	Bright
21	4.2	Bright
22	4.3	Bright
23	4.3	Bright
24	4.3	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright
31	4.6	Bright

Planning a trip in August

Hazard calendar for San Luis

In seasonPeak

None of San Luis's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

San Luis's rainy season runs October–April, 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 San Luis?

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

7.4

Sightseeing

3rd-best month of the year

2.7

Beach & pool

9th-best month of the year

August is one of the better times to visit San Luis for general sightseeing.

What to pack for San Luis in August

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

In August, San Luis sees daytime highs around 18°C and nights near 6°C. Worth packing: a warm layer.

a warm layer

UV index in San Luis in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Luis peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).

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)	14	13	10	6	4	3	3	4	6	10	12	13
Level	Extreme	Extreme	Extreme	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	13	Extreme
Mar	10	Extreme
Apr	6	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	10	Very high
Nov	12	Extreme
Dec	13	Extreme

Location & terrain

Where is San Luis?

San Luis sits at 33.3°S, 66.3°W, 729 m above sea level, in Argentina. The nearest listed city is Villa Mercedes, 91 km away.

Topography around San Luis

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

Within 3 km, the terrain around San Luis has only modest variations in elevation — a maximum elevation change of 121 m around an average of 743 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,416 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,820 m.

The land around San Luis is covered by artificial surfaces (72%) within 3 km, shrubs (50%) and grassland (24%) within 16 km, and shrubs (59%) and grassland (22%) within 80 km.

3 km

121 m

artificial surfaces 72%

16 km

1,416 m

shrubs 50%

80 km

1,820 m

shrubs 59%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

August weather nearby: Villa Mercedes 91 km · Villa Dolores 184 km · Río Cuarto 184 km · Rivadavia 199 km · San Martín 201 km · Embalse 217 km · Rodeo del Medio 222 km · General Alvear 226 km

Argentina travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / I; 220 V · 50 Hz
Prices: ≈ 46% of US; price level, 2025
GDP per capita: $14,898; 2025
Happiness: 6.4 / 10; World Happiness, 2025
Homicide rate: 4.5; per 100k, 2023
Road deaths: 14.1; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: High; EF EPI 575
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 San Luis (-33.2914°, -66.3247°, elevation 729 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. 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	17	4
2	17	4
3	17	4
4	17	5
5	17	5
6	17	5
7	17	5
8	17	5
9	18	5
10	18	5
11	18	5
12	18	5
13	18	5
14	18	6
15	18	6
16	18	6
17	19	6
18	19	6
19	19	6
20	19	6
21	19	7
22	19	7
23	19	7
24	19	7
25	19	7
26	19	7
27	20	7
28	20	7
29	20	7
30	20	7
31	20	7

	Clearer (%)	Cloudier (%)
1	78	22
2	78	22
3	78	22
4	78	22
5	78	22
6	78	22
7	77	23
8	77	23
9	77	23
10	77	23
11	77	23
12	77	23
13	77	23
14	77	23
15	76	24
16	76	24
17	75	25
18	75	25
19	75	25
20	75	25
21	76	24
22	76	24
23	76	24
24	76	24
25	76	24
26	76	24
27	76	24
28	76	24
29	75	25
30	75	25
31	75	25

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	78	22
2	78	22
3	78	22
4	78	22
5	78	22
6	78	22
7	77	23
8	77	23
9	77	23
10	77	23
11	77	23
12	77	23
13	77	23
14	77	23
15	76	24
16	76	24
17	75	25
18	75	25
19	75	25
20	75	25
21	76	24
22	76	24
23	76	24
24	76	24
25	76	24
26	76	24
27	76	24
28	76	24
29	75	25
30	75	25
31	75	25

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	78	22
2	78	22
3	78	22
4	78	22
5	78	22
6	78	22
7	77	23
8	77	23
9	77	23
10	77	23
11	77	23
12	77	23
13	77	23
14	77	23
15	76	24
16	76	24
17	75	25
18	75	25
19	75	25
20	75	25
21	76	24
22	76	24
23	76	24
24	76	24
25	76	24
26	76	24
27	76	24
28	76	24
29	75	25
30	75	25
31	75	25

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100