Las Heras weather in December

In December, Las Heras sees average daytime highs of 23°C and overnight lows near 11°C, with 13 mm of rain across 3.2 wet days and about 15.6 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels dry.

Daylight stretches from about 15 h 24 min at the start of December to 15 h 36 min by month's end. Set against the rest of the year, December is Las Heras's 6th-clearest and 1st-windiest month. For the whole year in context, see Las Heras's year-round climate.

Daytime high: 23°; 3rd warmest
Overnight low: 11°; 10th coldest
Rainfall: 13 mm; 3.2 wet days
Daylight: 15 h 36 min; 5:44 AM – 9:20 PM
Cloud cover: 51%; 6th clearest
Wind: 25 km/h; 1st windiest
Solar energy: 8.04 kWh/m²
Travel score: 8.1; 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.

← November Las Heras year-round climate January →Best places to visit in December

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical December day in Las Heras reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, December runs about 2°C warmer than November and about 2°C cooler than January.

	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)	22	22	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	24	24	24	24	24	24	24	24
Avg low (°C)	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12

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

How December really feels in Las Heras

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Las Heras weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 11th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 41%.

	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 (%)	57	57	57	57	58	58	58	59	59	59	59	59	59	59	59	59	58	58	58	58	58	59	59	59	59	59	60	61	61	62	62
Cloudier (%)	43	43	43	43	42	42	42	41	41	41	41	41	41	41	41	41	42	42	42	42	42	41	41	41	41	41	40	39	39	38	38

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	58	42
6	58	42
7	58	42
8	59	41
9	59	41
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	58	42
18	58	42
19	58	42
20	58	42
21	58	42
22	59	41
23	59	41
24	59	41
25	59	41
26	59	41
27	60	40
28	61	39
29	61	39
30	62	38
31	62	38

Chance of precipitation in December

Any precipitation

Las Heras gets around 13 mm of rain over 3.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 10% on the wettest days.

	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 (%)	10	10	10	10	10	10	10	10	10	10	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	10	10

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

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 December

Winds average 25 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 25 km/h on the calmest days to 26 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)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

	Wind speed (km/h)	Feels
1	25	breezy
2	25	breezy
3	25	breezy
4	25	breezy
5	25	breezy
6	25	breezy
7	25	breezy
8	25	breezy
9	25	breezy
10	25	breezy
11	25	breezy
12	25	breezy
13	25	breezy
14	25	breezy
15	26	breezy
16	26	breezy
17	26	breezy
18	26	breezy
19	26	breezy
20	26	breezy
21	26	breezy
22	26	breezy
23	26	breezy
24	26	breezy
25	26	breezy
26	26	breezy
27	26	breezy
28	26	breezy
29	26	breezy
30	26	breezy
31	26	breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 15 h 24 min at the start of December to 15 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 5:45 AM to 5:52 AM, and sunset from 9:06 PM to 9:26 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)	15.4	15.4	15.4	15.4	15.4	15.5	15.5	15.5	15.5	15.5	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6	15.6
Sunrise (AM)	5:45	5:45	5:44	5:44	5:44	5:43	5:43	5:43	5:43	5:43	5:43	5:43	5:43	5:43	5:43	5:44	5:44	5:44	5:45	5:45	5:45	5:46	5:46	5:47	5:47	5:48	5:49	5:49	5:50	5:51	5:52
Sunset (PM)	9:06	9:07	9:08	9:09	9:10	9:11	9:12	9:13	9:14	9:15	9:16	9:17	9:18	9:19	9:19	9:20	9:21	9:21	9:22	9:23	9:23	9:24	9:24	9:24	9:25	9:25	9:25	9:26	9:26	9:26	9:26

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.4	5:45	9:06
2	15.4	5:45	9:07
3	15.4	5:44	9:08
4	15.4	5:44	9:09
5	15.4	5:44	9:10
6	15.5	5:43	9:11
7	15.5	5:43	9:12
8	15.5	5:43	9:13
9	15.5	5:43	9:14
10	15.5	5:43	9:15
11	15.6	5:43	9:16
12	15.6	5:43	9:17
13	15.6	5:43	9:18
14	15.6	5:43	9:19
15	15.6	5:43	9:19
16	15.6	5:44	9:20
17	15.6	5:44	9:21
18	15.6	5:44	9:21
19	15.6	5:45	9:22
20	15.6	5:45	9:23
21	15.6	5:45	9:23
22	15.6	5:46	9:24
23	15.6	5:46	9:24
24	15.6	5:47	9:24
25	15.6	5:47	9:25
26	15.6	5:48	9:25
27	15.6	5:49	9:25
28	15.6	5:49	9:26
29	15.6	5:50	9:26
30	15.6	5:51	9:26
31	15.6	5:52	9:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.04 kWh/m² — the sunniest month for solar.

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 — December's 8.04 kWh/m² sits near the top of that range.

	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)	7.9	7.9	7.9	7.9	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.0	8.1	8.1	8.1	8.1	8.1	8.1
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	7.9	Intense
2	7.9	Intense
3	7.9	Intense
4	7.9	Intense
5	8.0	Intense
6	8.0	Intense
7	8.0	Intense
8	8.0	Intense
9	8.0	Intense
10	8.0	Intense
11	8.0	Intense
12	8.0	Intense
13	8.0	Intense
14	8.0	Intense
15	8.0	Intense
16	8.0	Intense
17	8.0	Intense
18	8.0	Intense
19	8.0	Intense
20	8.0	Intense
21	8.0	Intense
22	8.0	Intense
23	8.0	Intense
24	8.0	Intense
25	8.0	Intense
26	8.1	Intense
27	8.1	Intense
28	8.1	Intense
29	8.1	Intense
30	8.1	Intense
31	8.1	Intense

Planning a trip in December

Is December a good time to visit Las Heras?

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

8.1

Sightseeing

3rd-best month of the year

6.4

Beach & pool

3rd-best month of the year

December is one of the better times to visit Las Heras for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Las Heras in December

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

In December, Las Heras sees daytime highs around 23°C and nights near 11°C. Pack sun protection. Worth having: light clothes and a windbreaker. About 3 days see rain.

sun protectionlight clothesa windbreaker

UV index in Las Heras in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). 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

← November Las Heras year-round climate January →Best places to visit in December

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

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	58	42
6	58	42
7	58	42
8	59	41
9	59	41
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	58	42
18	58	42
19	58	42
20	58	42
21	58	42
22	59	41
23	59	41
24	59	41
25	59	41
26	59	41
27	60	40
28	61	39
29	61	39
30	62	38
31	62	38

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

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	58	42
6	58	42
7	58	42
8	59	41
9	59	41
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	58	42
18	58	42
19	58	42
20	58	42
21	58	42
22	59	41
23	59	41
24	59	41
25	59	41
26	59	41
27	60	40
28	61	39
29	61	39
30	62	38
31	62	38

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

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	58	42
6	58	42
7	58	42
8	59	41
9	59	41
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	58	42
18	58	42
19	58	42
20	58	42
21	58	42
22	59	41
23	59	41
24	59	41
25	59	41
26	59	41
27	60	40
28	61	39
29	61	39
30	62	38
31	62	38

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