El Chalten weather in September

In September, El Chalten sees average daytime highs of 1°C and overnight lows near -5°C, with 179 mm of precipitation across 19.2 wet days and about 11.6 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 0°C in the first days to 2°C by the end. The sky is clear or mostly clear about 14% of the time in September, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of September to 12 h 30 min by month's end. Set against the rest of the year, September is El Chalten's 4th-clearest and 8th-windiest month. For the whole year in context, see El Chalten's year-round climate.

Daytime high: 1°; 8th warmest
Overnight low: -5°; 4th coldest
Precipitation: 179 mm; 19.2 wet days
Daylight: 11 h 36 min; 7:57 AM – 7:35 PM
Cloud cover: 75%; 4th clearest
Wind: 7 km/h; 8th windiest
Solar energy: 3.55 kWh/m²
Travel score: 0.0; out of 10

← August El Chalten 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 0°C in the first days to 2°C by the end.

A typical September day in El Chalten reaches about 1°C in the afternoon and slips back to -5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 4°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°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)	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3
Avg low (°C)	-6	-6	-6	-6	-6	-6	-6	-6	-5	-5	-5	-5	-5	-5	-5	-5	-5	-5	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4	-4

	Avg high (°C)	Avg low (°C)
1	0	-6
2	0	-6
3	0	-6
4	1	-6
5	1	-6
6	1	-6
7	1	-6
8	1	-6
9	1	-5
10	1	-5
11	1	-5
12	1	-5
13	1	-5
14	1	-5
15	1	-5
16	2	-5
17	2	-5
18	2	-5
19	2	-4
20	2	-4
21	2	-4
22	2	-4
23	2	-4
24	2	-4
25	2	-4
26	2	-4
27	2	-4
28	3	-4
29	3	-4
30	3	-4

How September really feels in El Chalten

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 30 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

El Chalten weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	7° / 1°	252	22.8	19.5	15.6	0.8
Feb	8° / 1°	202	17.8	13.6	14.2	1.1
Mar	7° / -1°	250	20.9	17.3	12.5	0.5
Apr	4° / -3°	268	20.4	18.8	10.6	0.0
May	1° / -4°	265	20.3	20	8.9	0.0
Jun	-2° / -7°	221	19.7	20.6	8	0.0
Jul	-2° / -7°	219	19.9	20.8	8.4	0.0
Aug	-1° / -6°	215	20.4	21.4	9.8	0.0
Sep	1° / -5°	179	19.2	20.5	11.6	0.0
Oct	3° / -4°	228	19.9	20.4	13.5	0.0
Nov	4° / -2°	234	21	21	15.1	0.0
Dec	6° / -1°	262	22.8	20.7	16	0.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 77%.

	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 (%)	21	21	22	22	22	23	23	23	24	24	24	24	23	23	22	22	22	21	23	23	23	23	24	24	25	25	25	27	27	28
Cloudier (%)	79	79	78	78	78	77	77	77	76	76	76	76	77	77	78	78	78	79	77	77	77	77	76	76	75	75	75	73	73	72

	Clearer (%)	Cloudier (%)
1	21	79
2	21	79
3	22	78
4	22	78
5	22	78
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	24	76
12	24	76
13	23	77
14	23	77
15	22	78
16	22	78
17	22	78
18	21	79
19	23	77
20	23	77
21	23	77
22	23	77
23	24	76
24	24	76
25	25	75
26	25	75
27	25	75
28	27	73
29	27	73
30	28	72

Chance of precipitation in September

Any precipitationSnow

El Chalten gets around 179 mm of rain and snow over 19.2 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 65% and peaks near 67% on the wettest days, and about 21 days bring 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 (%)	66	66	66	66	65	65	65	65	65	66	66	66	67	67	67	67	67	67	66	66	65	64	64	63	62	62	61	61	60	60
Snow chance (%)	70	70	70	70	70	70	69	69	70	70	70	71	71	71	71	71	71	71	70	70	69	68	67	66	65	64	64	63	62	62

	Rain chance (%)	Snow chance (%)
1	66	70
2	66	70
3	66	70
4	66	70
5	65	70
6	65	70
7	65	69
8	65	69
9	65	70
10	66	70
11	66	70
12	66	71
13	67	71
14	67	71
15	67	71
16	67	71
17	67	71
18	67	71
19	66	70
20	66	70
21	65	69
22	64	68
23	64	67
24	63	66
25	62	65
26	62	64
27	61	64
28	61	63
29	60	62
30	60	62

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 7 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 10 h 42 min at the start of September to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over September. Sunrise moves from 8:30 AM to 7:25 AM, and sunset from 7:13 PM to 7:56 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)	10.7	10.8	10.8	10.9	11.0	11.0	11.1	11.1	11.2	11.3	11.3	11.4	11.5	11.5	11.6	11.6	11.7	11.8	11.8	11.9	12.0	12.0	12.1	12.1	12.2	12.3	12.3	12.4	12.5	12.5
Sunrise (AM)	8:30	8:28	8:26	8:23	8:21	8:19	8:17	8:15	8:12	8:10	8:08	8:06	8:03	8:01	7:59	7:57	7:54	7:52	7:50	7:48	7:45	7:43	7:41	7:39	7:36	7:34	7:32	7:30	7:28	7:25
Sunset (PM)	7:13	7:14	7:16	7:17	7:19	7:20	7:22	7:23	7:25	7:26	7:28	7:29	7:31	7:32	7:34	7:35	7:37	7:38	7:40	7:41	7:43	7:44	7:46	7:47	7:49	7:50	7:52	7:53	7:55	7:56

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	8:30	7:13
2	10.8	8:28	7:14
3	10.8	8:26	7:16
4	10.9	8:23	7:17
5	11.0	8:21	7:19
6	11.0	8:19	7:20
7	11.1	8:17	7:22
8	11.1	8:15	7:23
9	11.2	8:12	7:25
10	11.3	8:10	7:26
11	11.3	8:08	7:28
12	11.4	8:06	7:29
13	11.5	8:03	7:31
14	11.5	8:01	7:32
15	11.6	7:59	7:34
16	11.6	7:57	7:35
17	11.7	7:54	7:37
18	11.8	7:52	7:38
19	11.8	7:50	7:40
20	11.9	7:48	7:41
21	12.0	7:45	7:43
22	12.0	7:43	7:44
23	12.1	7:41	7:46
24	12.1	7:39	7:47
25	12.2	7:36	7:49
26	12.3	7:34	7:50
27	12.3	7:32	7:52
28	12.4	7:30	7:53
29	12.5	7:28	7:55
30	12.5	7:25	7:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.55 kWh/m².

For context, solar energy here swings from a low near 0.97 kWh/m² to a high of 7.27 kWh/m² in December across the year — September's 3.55 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)	2.8	2.8	2.9	2.9	3.0	3.0	3.1	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6	3.7	3.7	3.8	3.8	3.9	4.0	4.0	4.1	4.2	4.2	4.3	4.3	4.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	2.8	Moderate
2	2.8	Moderate
3	2.9	Moderate
4	2.9	Moderate
5	3.0	Moderate
6	3.0	Moderate
7	3.1	Moderate
8	3.1	Moderate
9	3.2	Moderate
10	3.2	Moderate
11	3.3	Moderate
12	3.3	Moderate
13	3.4	Moderate
14	3.4	Moderate
15	3.5	Moderate
16	3.5	Moderate
17	3.6	Moderate
18	3.7	Moderate
19	3.7	Moderate
20	3.8	Moderate
21	3.8	Moderate
22	3.9	Moderate
23	4.0	Moderate
24	4.0	Bright
25	4.1	Bright
26	4.2	Bright
27	4.2	Bright
28	4.3	Bright
29	4.3	Bright
30	4.4	Bright

Planning a trip in September

Is September a good time to visit El Chalten?

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

0.0

Sightseeing

5th-best month of the year

—

Beach & pool

never really warm enough

September is a weaker month for outdoor sightseeing in El Chalten.

What to pack for El Chalten in September

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

In September, El Chalten sees daytime highs around 1°C and nights near -5°C. Pack a warm layer, a heavy coat and rain gear. About 19 days see rain.

a warm layera heavy coatrain gear

UV index in El Chalten in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 El Chalten peaks around December 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	11	6	3	2	1	1	2	4	7	8	13
Level	Extreme	Extreme	High	Moderate	Low	Low	Low	Low	Moderate	High	Very high	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	11	Extreme
Mar	6	High
Apr	3	Moderate
May	2	Low
Jun	1	Low
Jul	1	Low
Aug	2	Low
Sep	4	Moderate
Oct	7	High
Nov	8	Very high
Dec	13	Extreme

Location & terrain

Where is El Chalten?

El Chalten sits at 49.3°S, 72.9°W, 0 m above sea level, in Argentina. The nearest listed city is El Calafate, 121 km away.

Topography around El Chalten

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

Within 3 km, the terrain around El Chalten has significant variations in elevation — a maximum elevation change of 458 m around an average of 530 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,616 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,553 m.

The land around El Chalten is covered by grassland (57%) and trees (23%) within 3 km, bare terrain (37%) and grassland (29%) within 16 km, and snow and ice (32%), grassland (25%) and bare terrain (23%) within 80 km.

3 km

458 m

grassland 57%

16 km

2,616 m

bare terrain 37%

80 km

3,553 m

snow and ice 32%

treesgrasslandartificial surfacesbare terrainsnow and icewatermoss and lichen

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

September weather nearby: El Calafate 121 km · Puerto Natales 268 km · Río Gallegos 362 km · Coyhaique 422 km · Las Heras 428 km · Puerto Aysén 437 km · Punta Arenas 448 km · Pico Truncado 462 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 El Chalten (-49.3299°, -72.886°, 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. 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	0	-6
2	0	-6
3	0	-6
4	1	-6
5	1	-6
6	1	-6
7	1	-6
8	1	-6
9	1	-5
10	1	-5
11	1	-5
12	1	-5
13	1	-5
14	1	-5
15	1	-5
16	2	-5
17	2	-5
18	2	-5
19	2	-4
20	2	-4
21	2	-4
22	2	-4
23	2	-4
24	2	-4
25	2	-4
26	2	-4
27	2	-4
28	3	-4
29	3	-4
30	3	-4

	Clearer (%)	Cloudier (%)
1	21	79
2	21	79
3	22	78
4	22	78
5	22	78
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	24	76
12	24	76
13	23	77
14	23	77
15	22	78
16	22	78
17	22	78
18	21	79
19	23	77
20	23	77
21	23	77
22	23	77
23	24	76
24	24	76
25	25	75
26	25	75
27	25	75
28	27	73
29	27	73
30	28	72

	Rain chance (%)	Snow chance (%)
1	66	70
2	66	70
3	66	70
4	66	70
5	65	70
6	65	70
7	65	69
8	65	69
9	65	70
10	66	70
11	66	70
12	66	71
13	67	71
14	67	71
15	67	71
16	67	71
17	67	71
18	67	71
19	66	70
20	66	70
21	65	69
22	64	68
23	64	67
24	63	66
25	62	65
26	62	64
27	61	64
28	61	63
29	60	62
30	60	62

	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	0	-6
2	0	-6
3	0	-6
4	1	-6
5	1	-6
6	1	-6
7	1	-6
8	1	-6
9	1	-5
10	1	-5
11	1	-5
12	1	-5
13	1	-5
14	1	-5
15	1	-5
16	2	-5
17	2	-5
18	2	-5
19	2	-4
20	2	-4
21	2	-4
22	2	-4
23	2	-4
24	2	-4
25	2	-4
26	2	-4
27	2	-4
28	3	-4
29	3	-4
30	3	-4

	Clearer (%)	Cloudier (%)
1	21	79
2	21	79
3	22	78
4	22	78
5	22	78
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	24	76
12	24	76
13	23	77
14	23	77
15	22	78
16	22	78
17	22	78
18	21	79
19	23	77
20	23	77
21	23	77
22	23	77
23	24	76
24	24	76
25	25	75
26	25	75
27	25	75
28	27	73
29	27	73
30	28	72

	Rain chance (%)	Snow chance (%)
1	66	70
2	66	70
3	66	70
4	66	70
5	65	70
6	65	70
7	65	69
8	65	69
9	65	70
10	66	70
11	66	70
12	66	71
13	67	71
14	67	71
15	67	71
16	67	71
17	67	71
18	67	71
19	66	70
20	66	70
21	65	69
22	64	68
23	64	67
24	63	66
25	62	65
26	62	64
27	61	64
28	61	63
29	60	62
30	60	62

	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	0	-6
2	0	-6
3	0	-6
4	1	-6
5	1	-6
6	1	-6
7	1	-6
8	1	-6
9	1	-5
10	1	-5
11	1	-5
12	1	-5
13	1	-5
14	1	-5
15	1	-5
16	2	-5
17	2	-5
18	2	-5
19	2	-4
20	2	-4
21	2	-4
22	2	-4
23	2	-4
24	2	-4
25	2	-4
26	2	-4
27	2	-4
28	3	-4
29	3	-4
30	3	-4

	Clearer (%)	Cloudier (%)
1	21	79
2	21	79
3	22	78
4	22	78
5	22	78
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	24	76
12	24	76
13	23	77
14	23	77
15	22	78
16	22	78
17	22	78
18	21	79
19	23	77
20	23	77
21	23	77
22	23	77
23	24	76
24	24	76
25	25	75
26	25	75
27	25	75
28	27	73
29	27	73
30	28	72

	Rain chance (%)	Snow chance (%)
1	66	70
2	66	70
3	66	70
4	66	70
5	65	70
6	65	70
7	65	69
8	65	69
9	65	70
10	66	70
11	66	70
12	66	71
13	67	71
14	67	71
15	67	71
16	67	71
17	67	71
18	67	71
19	66	70
20	66	70
21	65	69
22	64	68
23	64	67
24	63	66
25	62	65
26	62	64
27	61	64
28	61	63
29	60	62
30	60	62

	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