Mendoza weather in September

In September, Mendoza sees average daytime highs of 20°C and overnight lows near 9°C, with 28 mm of precipitation across 5 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 66% 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 Mendoza's 2nd-clearest and 4th-windiest month. For the whole year in context, see Mendoza's year-round climate.

Daytime high: 20°; 8th warmest
Overnight low: 9°; 5th coldest
Precipitation: 28 mm; 5 wet days
Daylight: 11 h 48 min; 7:36 AM – 7:24 PM
Cloud cover: 32%; 2nd clearest
Wind: 9 km/h; 4th windiest
Solar energy: 5.43 kWh/m²
Travel score: 7.6; out of 10

Mendoza is city in Argentina.

Density: 2,128/km²; people per km²
Founded: 1561

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

← August Mendoza 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 19°C in the first days to 22°C by the end.

A typical September day in Mendoza reaches about 20°C in the afternoon and slips back to 9°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°C. Set against its neighbours, September runs about 4°C warmer than August and about 4°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)	19	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	21	21	21	21	21	21	21	22	22	22	22	22	22	22
Avg low (°C)	7	7	7	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	11

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

Mendoza weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	31° / 20°	48	7.8	0	13.9	4.9
Feb	30° / 18°	46	7.1	0	13.2	5.8
Mar	26° / 16°	59	7.8	0	12.3	7.3
Apr	22° / 12°	40	6.5	0	11.2	7.5
May	17° / 8°	30	6.1	0	10.3	6.2
Jun	14° / 5°	21	4.1	0.2	9.9	5.0
Jul	14° / 4°	19	3.6	0.7	10.1	4.9
Aug	17° / 6°	25	4.1	0.4	10.8	6.6
Sep	20° / 9°	28	5	0.1	11.8	7.6
Oct	24° / 12°	43	6.5	0	12.8	7.9
Nov	28° / 16°	44	7.5	0	13.7	7.0
Dec	30° / 18°	47	6.8	0	14.1	5.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 22%.

	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 (%)	76	76	75	75	76	76	76	76	77	77	78	78	78	79	79	79	80	80	80	80	79	79	79	79	79	79	77	77	77	77
Cloudier (%)	24	24	25	25	24	24	24	24	23	23	22	22	22	21	21	21	20	20	20	20	21	21	21	21	21	21	23	23	23	23

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	75	25
4	75	25
5	76	24
6	76	24
7	76	24
8	76	24
9	77	23
10	77	23
11	78	22
12	78	22
13	78	22
14	79	21
15	79	21
16	79	21
17	80	20
18	80	20
19	80	20
20	80	20
21	79	21
22	79	21
23	79	21
24	79	21
25	79	21
26	79	21
27	77	23
28	77	23
29	77	23
30	77	23

Chance of precipitation in September

Any precipitation

Mendoza gets around 28 mm of rain and snow over 5 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 17% and peaks near 21% 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
Rain chance (%)	14	15	15	15	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	17	17	17	18	18	19	19	20	20	21

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

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 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
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

	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

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 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)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	10
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

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

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 7:56 AM to 7:16 AM, and sunset from 7:14 PM to 7:33 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	11.4	11.4	11.4	11.5	11.5	11.5	11.6	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	12.1	12.2	12.2	12.3	12.3
Sunrise (AM)	7:56	7:55	7:54	7:52	7:51	7:50	7:48	7:47	7:46	7:44	7:43	7:41	7:40	7:39	7:37	7:36	7:34	7:33	7:31	7:30	7:29	7:27	7:26	7:24	7:23	7:22	7:20	7:19	7:17	7:16
Sunset (PM)	7:14	7:14	7:15	7:16	7:16	7:17	7:18	7:18	7:19	7:20	7:20	7:21	7:22	7:22	7:23	7:24	7:24	7:25	7:26	7:26	7:27	7:28	7:28	7:29	7:30	7:30	7:31	7:32	7:33	7:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.3	7:56	7:14
2	11.3	7:55	7:14
3	11.4	7:54	7:15
4	11.4	7:52	7:16
5	11.4	7:51	7:16
6	11.5	7:50	7:17
7	11.5	7:48	7:18
8	11.5	7:47	7:18
9	11.6	7:46	7:19
10	11.6	7:44	7:20
11	11.6	7:43	7:20
12	11.7	7:41	7:21
13	11.7	7:40	7:22
14	11.7	7:39	7:22
15	11.8	7:37	7:23
16	11.8	7:36	7:24
17	11.8	7:34	7:24
18	11.9	7:33	7:25
19	11.9	7:31	7:26
20	11.9	7:30	7:26
21	12.0	7:29	7:27
22	12.0	7:27	7:28
23	12.0	7:26	7:28
24	12.1	7:24	7:29
25	12.1	7:23	7:30
26	12.1	7:22	7:30
27	12.2	7:20	7:31
28	12.2	7:19	7:32
29	12.3	7:17	7:33
30	12.3	7:16	7:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.43 kWh/m².

For context, solar energy here swings from a low near 2.87 kWh/m² to a high of 7.98 kWh/m² in December across the year — September's 5.43 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)	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.3	5.3	5.4	5.4	5.5	5.5	5.6	5.6	5.6	5.7	5.7	5.8	5.8	5.8	5.8	5.9	5.9	5.9	6.0
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	4.8	Bright
2	4.8	Bright
3	4.9	Bright
4	4.9	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.1	Bright
9	5.1	Bright
10	5.2	Bright
11	5.2	Bright
12	5.3	Bright
13	5.3	Bright
14	5.4	Bright
15	5.4	Bright
16	5.5	Bright
17	5.5	Bright
18	5.6	Bright
19	5.6	Bright
20	5.6	Bright
21	5.7	Bright
22	5.7	Bright
23	5.8	Bright
24	5.8	Bright
25	5.8	Bright
26	5.8	Bright
27	5.9	Bright
28	5.9	Bright
29	5.9	Bright
30	6.0	Bright

Planning a trip in September

Is September a good time to visit Mendoza?

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

7.6

Sightseeing

2nd-best month of the year

4.2

Beach & pool

8th-best month of the year

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

What to pack for Mendoza in September

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

In September, Mendoza sees daytime highs around 20°C and nights near 9°C. Worth packing: sun protection. About 5 days see rain.

sun protection

UV index in Mendoza in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mendoza peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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)	15	13	11	6	4	3	3	5	7	10	12	13
Level	Extreme	Extreme	Extreme	High	Moderate	Moderate	Moderate	Moderate	High	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	13	Extreme
Mar	11	Extreme
Apr	6	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	5	Moderate
Sep	7	High
Oct	10	Extreme
Nov	12	Extreme
Dec	13	Extreme

Location & terrain

Where is Mendoza?

Mendoza sits at 32.9°S, 68.8°W, 853 m above sea level, in Argentina. The nearest listed city is Rodeo del Medio, 19 km away.

Topography around Mendoza

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

Within 3 km, the terrain around Mendoza has only modest variations in elevation — a maximum elevation change of 135 m around an average of 773 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,610 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,377 m.

The land around Mendoza is covered by artificial surfaces (83%) within 3 km, shrubs (42%) and artificial surfaces (24%) within 16 km, and shrubs (44%), bare terrain (23%) and grassland (21%) within 80 km.

3 km

135 m

artificial surfaces 83%

16 km

1,610 m

shrubs 42%

80 km

5,377 m

shrubs 44%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

September weather nearby: Rodeo del Medio 19 km · Perdriel 21 km · San Martín 41 km · Rivadavia 49 km · Tupungato 60 km · Tunuyán 79 km · Pocito 136 km · Caucete 148 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 Mendoza (-32.8895°, -68.8458°, elevation 853 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	19	7
2	19	7
3	19	7
4	19	8
5	19	8
6	19	8
7	19	8
8	19	8
9	19	8
10	20	8
11	20	8
12	20	8
13	20	8
14	20	9
15	20	9
16	20	9
17	21	9
18	21	9
19	21	9
20	21	9
21	21	9
22	21	10
23	21	10
24	22	10
25	22	10
26	22	10
27	22	10
28	22	10
29	22	10
30	22	11

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	75	25
4	75	25
5	76	24
6	76	24
7	76	24
8	76	24
9	77	23
10	77	23
11	78	22
12	78	22
13	78	22
14	79	21
15	79	21
16	79	21
17	80	20
18	80	20
19	80	20
20	80	20
21	79	21
22	79	21
23	79	21
24	79	21
25	79	21
26	79	21
27	77	23
28	77	23
29	77	23
30	77	23

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

	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

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

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	75	25
4	75	25
5	76	24
6	76	24
7	76	24
8	76	24
9	77	23
10	77	23
11	78	22
12	78	22
13	78	22
14	79	21
15	79	21
16	79	21
17	80	20
18	80	20
19	80	20
20	80	20
21	79	21
22	79	21
23	79	21
24	79	21
25	79	21
26	79	21
27	77	23
28	77	23
29	77	23
30	77	23

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

	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

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

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	75	25
4	75	25
5	76	24
6	76	24
7	76	24
8	76	24
9	77	23
10	77	23
11	78	22
12	78	22
13	78	22
14	79	21
15	79	21
16	79	21
17	80	20
18	80	20
19	80	20
20	80	20
21	79	21
22	79	21
23	79	21
24	79	21
25	79	21
26	79	21
27	77	23
28	77	23
29	77	23
30	77	23

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

	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