Las Heras weather in September

In September, Las Heras sees average daytime highs of 14°C and overnight lows near 4°C, with 19 mm of precipitation across 4.7 wet days and about 11.6 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 16°C by the end. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of September to 12 h 30 min by month's end. Set against the rest of the year, September is Las Heras's 12th-clearest and 8th-windiest month. For the whole year in context, see Las Heras's year-round climate.

Daytime high: 14°; 8th warmest
Overnight low: 4°; 5th coldest
Precipitation: 19 mm; 4.7 wet days
Daylight: 11 h 42 min; 7:40 AM – 7:20 PM
Cloud cover: 53%; 12th clearest
Wind: 19 km/h; 8th windiest
Solar energy: 3.98 kWh/m²
Travel score: 4.6; out of 10

Las Heras is city in Santa Cruz, Argentina.

Density: 194/km²; people per km²
Founded: 1914

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

← August Las Heras 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 12°C in the first days to 16°C by the end.

A typical September day in Las Heras reaches about 14°C in the afternoon and slips back to 4°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 18°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)	12	12	12	12	12	12	12	13	13	13	13	13	13	14	14	14	14	14	14	15	15	15	15	15	15	15	16	16	16	16
Avg low (°C)	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	5	5	5	5	5	5

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

How September really feels in Las Heras

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 21 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.

Las Heras weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	25° / 12°	8	2.5	0	15.2	8.3
Feb	24° / 12°	14	2.6	0	14	8.3
Mar	21° / 10°	17	3.1	0	12.4	7.7
Apr	16° / 6°	17	3.9	0.1	10.7	6.1
May	11° / 3°	24	4.8	1	9.2	3.4
Jun	7° / 0°	27	5.8	2.5	8.4	1.2
Jul	7° / -0°	18	4.5	2.3	8.8	1.2
Aug	10° / 1°	20	5.1	1.6	10	2.7
Sep	14° / 4°	19	4.7	0.8	11.6	4.6
Oct	18° / 6°	15	3.8	0.3	13.3	6.7
Nov	21° / 9°	16	2.9	0	14.8	7.6
Dec	23° / 11°	13	3.2	0	15.6	8.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 43%.

	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 (%)	56	56	58	58	58	59	59	58	58	58	58	58	58	58	58	59	58	58	58	57	57	55	55	55	55	55	55	54	54	54
Cloudier (%)	44	44	42	42	42	41	41	42	42	42	42	42	42	42	42	41	42	42	42	43	43	45	45	45	45	45	45	46	46	46

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	58	42
4	58	42
5	58	42
6	59	41
7	59	41
8	58	42
9	58	42
10	58	42
11	58	42
12	58	42
13	58	42
14	58	42
15	58	42
16	59	41
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	55	45
23	55	45
24	55	45
25	55	45
26	55	45
27	55	45
28	54	46
29	54	46
30	54	46

Chance of precipitation in September

Any precipitationSnow

Las Heras gets around 19 mm of rain and snow over 4.7 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 15% and peaks near 19% on the wettest days, and about 1 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 (%)	19	19	18	18	18	17	17	16	16	16	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Snow chance (%)	5	5	5	5	5	4	4	4	3	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2

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

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 19 km/h in September.

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 10 h 48 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 102 minutes over September. Sunrise moves from 8:10 AM to 7:11 AM, and sunset from 7:00 PM to 7:39 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)	10.8	10.9	10.9	11.0	11.1	11.1	11.2	11.2	11.3	11.3	11.4	11.4	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.3	12.4	12.4	12.5
Sunrise (AM)	8:10	8:08	8:06	8:04	8:02	8:00	7:58	7:56	7:54	7:52	7:50	7:48	7:46	7:44	7:42	7:40	7:38	7:36	7:34	7:32	7:29	7:27	7:25	7:23	7:21	7:19	7:17	7:15	7:13	7:11
Sunset (PM)	7:00	7:02	7:03	7:04	7:06	7:07	7:08	7:10	7:11	7:12	7:14	7:15	7:16	7:18	7:19	7:20	7:22	7:23	7:24	7:26	7:27	7:28	7:30	7:31	7:32	7:34	7:35	7:36	7:38	7:39

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.8	8:10	7:00
2	10.9	8:08	7:02
3	10.9	8:06	7:03
4	11.0	8:04	7:04
5	11.1	8:02	7:06
6	11.1	8:00	7:07
7	11.2	7:58	7:08
8	11.2	7:56	7:10
9	11.3	7:54	7:11
10	11.3	7:52	7:12
11	11.4	7:50	7:14
12	11.4	7:48	7:15
13	11.5	7:46	7:16
14	11.6	7:44	7:18
15	11.6	7:42	7:19
16	11.7	7:40	7:20
17	11.7	7:38	7:22
18	11.8	7:36	7:23
19	11.8	7:34	7:24
20	11.9	7:32	7:26
21	12.0	7:29	7:27
22	12.0	7:27	7:28
23	12.1	7:25	7:30
24	12.1	7:23	7:31
25	12.2	7:21	7:32
26	12.2	7:19	7:34
27	12.3	7:17	7:35
28	12.4	7:15	7:36
29	12.4	7:13	7:38
30	12.5	7:11	7:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.98 kWh/m².

For context, solar energy here swings from a low near 1.36 kWh/m² to a high of 8.04 kWh/m² in December across the year — September's 3.98 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)	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6	3.6	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8
Level	Moderate	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

	Solar energy (kWh/m²)	Level
1	3.2	Moderate
2	3.3	Moderate
3	3.3	Moderate
4	3.4	Moderate
5	3.4	Moderate
6	3.5	Moderate
7	3.5	Moderate
8	3.6	Moderate
9	3.6	Moderate
10	3.7	Moderate
11	3.8	Moderate
12	3.8	Moderate
13	3.9	Moderate
14	3.9	Moderate
15	4.0	Moderate
16	4.0	Bright
17	4.1	Bright
18	4.1	Bright
19	4.2	Bright
20	4.2	Bright
21	4.3	Bright
22	4.3	Bright
23	4.4	Bright
24	4.5	Bright
25	4.5	Bright
26	4.6	Bright
27	4.6	Bright
28	4.7	Bright
29	4.7	Bright
30	4.8	Bright

Planning a trip in September

Is September a good time to visit Las Heras?

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

4.6

Sightseeing

8th-best month of the year

0.1

Beach & pool

8th-best month of the year

September is a reasonable time to visit Las Heras for sightseeing.

What to pack for Las Heras in September

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

In September, Las Heras sees daytime highs around 14°C and nights near 4°C. Worth packing: a warm layer. About 5 days see rain.

a warm layer

UV index in Las Heras in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Las Heras peaks around December 24 at about 11 (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)	11	10	6	3	2	1	1	2	3	6	8	11
Level	Extreme	Very high	High	Moderate	Low	Low	Low	Low	Moderate	High	Very high	Extreme

	UV index (midday)	Level
Jan	11	Extreme
Feb	10	Very high
Mar	6	High
Apr	3	Moderate
May	2	Low
Jun	1	Low
Jul	1	Low
Aug	2	Low
Sep	3	Moderate
Oct	6	High
Nov	8	Very high
Dec	11	Extreme

Location & terrain

Where is Las Heras?

Las Heras sits at 46.5°S, 68.9°W, 324 m above sea level, in Argentina. The nearest listed city is Pico Truncado, 80 km away.

Topography around Las Heras

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

Within 3 km, the terrain around Las Heras has only modest variations in elevation — a maximum elevation change of 38 m around an average of 334 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 462 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,258 m.

The land around Las Heras is covered by grassland (44%), bare terrain (30%) and artificial surfaces (21%) within 3 km, grassland (65%) and bare terrain (30%) within 16 km, and grassland (69%) and bare terrain (23%) within 80 km.

3 km

38 m

grassland 44%

16 km

462 m

grassland 65%

80 km

1,258 m

grassland 69%

shrubsgrasslandartificial surfacesbare terrainwater

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

September weather nearby: Pico Truncado 80 km · Caleta Olivia 108 km · Comodoro Rivadavia 134 km · Coyhaique 265 km · Puerto Deseado 266 km · Puerto Aysén 317 km · El Chalten 428 km · Esquel 445 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 Las Heras (-46.5413°, -68.9323°, elevation 324 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	12	2
2	12	2
3	12	2
4	12	2
5	12	2
6	12	3
7	12	3
8	13	3
9	13	3
10	13	3
11	13	3
12	13	3
13	13	3
14	14	3
15	14	3
16	14	4
17	14	4
18	14	4
19	14	4
20	15	4
21	15	4
22	15	4
23	15	4
24	15	4
25	15	5
26	15	5
27	16	5
28	16	5
29	16	5
30	16	5

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	58	42
4	58	42
5	58	42
6	59	41
7	59	41
8	58	42
9	58	42
10	58	42
11	58	42
12	58	42
13	58	42
14	58	42
15	58	42
16	59	41
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	55	45
23	55	45
24	55	45
25	55	45
26	55	45
27	55	45
28	54	46
29	54	46
30	54	46

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

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

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	58	42
4	58	42
5	58	42
6	59	41
7	59	41
8	58	42
9	58	42
10	58	42
11	58	42
12	58	42
13	58	42
14	58	42
15	58	42
16	59	41
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	55	45
23	55	45
24	55	45
25	55	45
26	55	45
27	55	45
28	54	46
29	54	46
30	54	46

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

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

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	58	42
4	58	42
5	58	42
6	59	41
7	59	41
8	58	42
9	58	42
10	58	42
11	58	42
12	58	42
13	58	42
14	58	42
15	58	42
16	59	41
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	55	45
23	55	45
24	55	45
25	55	45
26	55	45
27	55	45
28	54	46
29	54	46
30	54	46

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

	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