Villa Mercedes weather in September

In September, Villa Mercedes sees average daytime highs of 21°C and overnight lows near 9°C, with 36 mm of precipitation across 5.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 22°C by the end. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Villa Mercedes's 4th-clearest and 3rd-windiest month. For the whole year in context, see Villa Mercedes's year-round climate.

Daytime high: 21°; 8th warmest
Overnight low: 9°; 5th coldest
Precipitation: 36 mm; 5.6 wet days
Daylight: 11 h 48 min; 7:22 AM – 7:10 PM
Cloud cover: 40%; 4th clearest
Wind: 13 km/h; 3rd windiest
Solar energy: 5 kWh/m²
Travel score: 7.5; out of 10

Villa Mercedes is city in San Luis, Argentina.

Founded: 1856

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

← August Villa Mercedes year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 22°C by the end.

A typical September day in Villa Mercedes reaches about 21°C in the afternoon and slips back to 9°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 29°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

	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
Avg high (°C)	20	20	20	20	20	21	21	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23
Avg low (°C)	7	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	9	9	10	10	10	10	10	10

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

Villa Mercedes weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 18°	86	11.6	14	5.0
Feb	29° / 17°	79	9.4	13.3	5.7
Mar	27° / 15°	87	9.4	12.3	6.9
Apr	23° / 12°	67	7.2	11.2	7.5
May	19° / 8°	29	4.6	10.3	7.0
Jun	17° / 5°	11	2.5	9.8	6.4
Jul	16° / 4°	11	2.5	10	6.3
Aug	19° / 6°	21	3	10.7	7.5
Sep	21° / 9°	36	5.6	11.8	7.5
Oct	24° / 12°	83	9.6	12.8	7.2
Nov	27° / 15°	86	11.3	13.7	6.6
Dec	29° / 17°	97	11.8	14.2	5.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 31%.

	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
Clearer (%)	71	71	69	69	69	69	69	69	70	70	70	71	71	71	71	71	71	71	71	70	70	69	69	67	67	66	66	66	65	64
Cloudier (%)	29	29	31	31	31	31	31	31	30	30	30	29	29	29	29	29	29	29	29	30	30	31	31	33	33	34	34	34	35	36

	Clearer (%)	Cloudier (%)
1	71	29
2	71	29
3	69	31
4	69	31
5	69	31
6	69	31
7	69	31
8	69	31
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	71	29
19	71	29
20	70	30
21	70	30
22	69	31
23	69	31
24	67	33
25	67	33
26	66	34
27	66	34
28	66	34
29	65	35
30	64	36

Chance of precipitation in September

Any precipitation

Villa Mercedes gets around 36 mm of rain and snow over 5.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 19% and peaks near 26% on the wettest days, and about 0 day brings snow. The odds climb 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
Rain chance (%)	13	13	13	14	14	14	15	15	15	15	16	16	16	17	17	18	19	19	20	21	21	22	23	23	24	25	25	25	26	26

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 97% 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
Dry (%)	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	98	97	96	96	96	96	95	95	95	95	94
Comfortable (%)	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	4	4	4	4	5
Humid (%)	0	0	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

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	98	2	0
5	98	2	0
6	98	2	0
7	98	2	0
8	98	2	0
9	98	2	0
10	98	2	0
11	98	2	0
12	98	2	0
13	98	2	0
14	98	2	0
15	98	2	0
16	98	2	0
17	98	2	0
18	98	2	0
19	98	2	0
20	98	2	0
21	97	2	1
22	96	3	1
23	96	3	1
24	96	3	1
25	96	3	1
26	95	4	1
27	95	4	1
28	95	4	1
29	95	4	1
30	94	5	1

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 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
Wind speed (km/h)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in September

DaylightNight

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

Days grow by about 60 minutes over September. Sunrise moves from 7:44 AM to 7:02 AM, and sunset from 7:00 PM to 7:20 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
Daylight (h)	11.3	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.7	11.7	11.7	11.8	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3
Sunrise (AM)	7:44	7:42	7:41	7:39	7:38	7:37	7:35	7:34	7:32	7:31	7:30	7:28	7:27	7:25	7:24	7:22	7:21	7:19	7:18	7:17	7:15	7:14	7:12	7:11	7:09	7:08	7:07	7:05	7:04	7:02
Sunset (PM)	7:00	7:00	7:01	7:02	7:02	7:03	7:04	7:04	7:05	7:06	7:06	7:07	7:08	7:09	7:09	7:10	7:11	7:11	7:12	7:13	7:13	7:14	7:15	7:16	7:16	7:17	7:18	7:19	7:19	7:20

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.3	7:44	7:00
2	11.3	7:42	7:00
3	11.3	7:41	7:01
4	11.4	7:39	7:02
5	11.4	7:38	7:02
6	11.4	7:37	7:03
7	11.5	7:35	7:04
8	11.5	7:34	7:04
9	11.5	7:32	7:05
10	11.6	7:31	7:06
11	11.6	7:30	7:06
12	11.7	7:28	7:07
13	11.7	7:27	7:08
14	11.7	7:25	7:09
15	11.8	7:24	7:09
16	11.8	7:22	7:10
17	11.8	7:21	7:11
18	11.9	7:19	7:11
19	11.9	7:18	7:12
20	11.9	7:17	7:13
21	12.0	7:15	7:13
22	12.0	7:14	7:14
23	12.0	7:12	7:15
24	12.1	7:11	7:16
25	12.1	7:09	7:16
26	12.2	7:08	7:17
27	12.2	7:07	7:18
28	12.2	7:05	7:19
29	12.3	7:04	7:19
30	12.3	7:02	7:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5 kWh/m².

For context, solar energy here swings from a low near 2.71 kWh/m² to a high of 7.49 kWh/m² in December across the year — September's 5 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
Solar energy (kWh/m²)	4.4	4.5	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.3	5.4	5.4	5.4
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

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.5	Bright
3	4.5	Bright
4	4.5	Bright
5	4.6	Bright
6	4.6	Bright
7	4.7	Bright
8	4.7	Bright
9	4.8	Bright
10	4.8	Bright
11	4.9	Bright
12	4.9	Bright
13	5.0	Bright
14	5.0	Bright
15	5.0	Bright
16	5.1	Bright
17	5.1	Bright
18	5.2	Bright
19	5.2	Bright
20	5.2	Bright
21	5.2	Bright
22	5.3	Bright
23	5.3	Bright
24	5.3	Bright
25	5.3	Bright
26	5.3	Bright
27	5.3	Bright
28	5.4	Bright
29	5.4	Bright
30	5.4	Bright

Planning a trip in September

Hazard calendar for Villa Mercedes

In seasonPeak

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

Villa Mercedes'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 September a good time to visit Villa Mercedes?

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

7.5

Sightseeing

1st-best month of the year

4.9

Beach & pool

8th-best month of the year

September is one of the better times to visit Villa Mercedes for general sightseeing.

What to pack for Villa Mercedes in September

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

In September, Villa Mercedes sees daytime highs around 21°C and nights near 9°C. Worth packing: sun protection. About 6 days see rain.

sun protection

UV index in Villa Mercedes in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Villa Mercedes 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 — in 11 months 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 Villa Mercedes?

Villa Mercedes sits at 33.7°S, 65.5°W, 516 m above sea level, in Argentina. The nearest listed city is San Luis, 91 km away.

Topography around Villa Mercedes

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

Within 3 km, the terrain around Villa Mercedes has only modest variations in elevation — a maximum elevation change of 30 m around an average of 514 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 204 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,418 m.

The land around Villa Mercedes is covered by artificial surfaces (58%) and grassland (27%) within 3 km, cropland (52%) and grassland (24%) within 16 km, and cropland (59%) and grassland (31%) within 80 km.

3 km

30 m

artificial surfaces 58%

16 km

204 m

cropland 52%

80 km

1,418 m

cropland 59%

treesshrubsgrasslandcroplandartificial surfaces

← August Villa Mercedes year-round climate October →Best places to visit in September

September weather nearby: San Luis 91 km · Río Cuarto 119 km · Embalse 191 km · Villa Dolores 194 km · Laboulaye 197 km · Río Tercero 209 km · Alta Gracia 245 km · Villa Nueva 248 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 Villa Mercedes (-33.6757°, -65.4578°, elevation 516 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	20	7
2	20	8
3	20	8
4	20	8
5	20	8
6	21	8
7	21	8
8	21	8
9	21	8
10	21	8
11	21	8
12	21	8
13	21	8
14	21	8
15	21	9
16	22	9
17	22	9
18	22	9
19	22	9
20	22	9
21	22	9
22	22	9
23	22	9
24	22	9
25	22	10
26	22	10
27	22	10
28	22	10
29	23	10
30	23	10

	Clearer (%)	Cloudier (%)
1	71	29
2	71	29
3	69	31
4	69	31
5	69	31
6	69	31
7	69	31
8	69	31
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	71	29
19	71	29
20	70	30
21	70	30
22	69	31
23	69	31
24	67	33
25	67	33
26	66	34
27	66	34
28	66	34
29	65	35
30	64	36

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

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	98	2	0
5	98	2	0
6	98	2	0
7	98	2	0
8	98	2	0
9	98	2	0
10	98	2	0
11	98	2	0
12	98	2	0
13	98	2	0
14	98	2	0
15	98	2	0
16	98	2	0
17	98	2	0
18	98	2	0
19	98	2	0
20	98	2	0
21	97	2	1
22	96	3	1
23	96	3	1
24	96	3	1
25	96	3	1
26	95	4	1
27	95	4	1
28	95	4	1
29	95	4	1
30	94	5	1

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

	Clearer (%)	Cloudier (%)
1	71	29
2	71	29
3	69	31
4	69	31
5	69	31
6	69	31
7	69	31
8	69	31
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	71	29
19	71	29
20	70	30
21	70	30
22	69	31
23	69	31
24	67	33
25	67	33
26	66	34
27	66	34
28	66	34
29	65	35
30	64	36

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

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	98	2	0
5	98	2	0
6	98	2	0
7	98	2	0
8	98	2	0
9	98	2	0
10	98	2	0
11	98	2	0
12	98	2	0
13	98	2	0
14	98	2	0
15	98	2	0
16	98	2	0
17	98	2	0
18	98	2	0
19	98	2	0
20	98	2	0
21	97	2	1
22	96	3	1
23	96	3	1
24	96	3	1
25	96	3	1
26	95	4	1
27	95	4	1
28	95	4	1
29	95	4	1
30	94	5	1

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

	Clearer (%)	Cloudier (%)
1	71	29
2	71	29
3	69	31
4	69	31
5	69	31
6	69	31
7	69	31
8	69	31
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	71	29
16	71	29
17	71	29
18	71	29
19	71	29
20	70	30
21	70	30
22	69	31
23	69	31
24	67	33
25	67	33
26	66	34
27	66	34
28	66	34
29	65	35
30	64	36

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

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	98	2	0
5	98	2	0
6	98	2	0
7	98	2	0
8	98	2	0
9	98	2	0
10	98	2	0
11	98	2	0
12	98	2	0
13	98	2	0
14	98	2	0
15	98	2	0
16	98	2	0
17	98	2	0
18	98	2	0
19	98	2	0
20	98	2	0
21	97	2	1
22	96	3	1
23	96	3	1
24	96	3	1
25	96	3	1
26	95	4	1
27	95	4	1
28	95	4	1
29	95	4	1
30	94	5	1