Río Grande weather in December

In December, Río Grande sees average daytime highs of 12°C and overnight lows near 7°C, with 42 mm of rain across 10.3 wet days and about 16.7 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 12% of the time in December, and the air most often feels dry.

Daylight stretches from about 16 h 24 min at the start of December to 16 h 48 min by month's end. Set against the rest of the year, December is Río Grande's 12th-clearest and 2nd-windiest month. For the whole year in context, see Río Grande's year-round climate.

Daytime high: 12°; 3rd warmest
Overnight low: 7°; 9th coldest
Rainfall: 42 mm; 10.3 wet days
Daylight: 16 h 48 min; 5:03 AM – 9:51 PM
Cloud cover: 70%; 12th clearest
Wind: 29 km/h; 2nd windiest
Solar energy: 6.66 kWh/m²
Travel score: 2.9; out of 10

Río Grande is city in Tierra del Fuego, Argentina.

Density: 4/km²; people per km²
Founded: 1921

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

← November Río Grande 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 12°C through the month.

A typical December day in Río Grande reaches about 12°C in the afternoon and slips back to 7°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 14°C. Set against its neighbours, December runs about 1°C warmer than November and about 1°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)	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Avg low (°C)	6	6	6	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	8	8

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

How December really feels in Río Grande

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.

Río Grande weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	13° / 8°	49	12.3	0	16.2	3.3
Feb	13° / 8°	38	9.1	0	14.6	3.5
Mar	12° / 7°	44	9.6	0	12.5	2.9
Apr	9° / 5°	39	9.2	0.1	10.3	2.0
May	7° / 3°	35	7.9	0.2	8.4	0.9
Jun	5° / 1°	29	6.6	1	7.3	0.0
Jul	4° / 1°	27	6.9	1.5	7.7	0.0
Aug	5° / 1°	26	6.4	1.1	9.4	0.1
Sep	6° / 2°	24	6.2	0.5	11.5	0.7
Oct	8° / 4°	22	6.3	0.3	13.8	1.6
Nov	10° / 6°	30	8.3	0	15.7	2.4
Dec	12° / 7°	42	10.3	0	16.7	2.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 68%.

	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 (%)	32	32	32	32	33	33	32	33	33	33	34	33	33	33	33	33	33	33	33	33	33	33	32	31	31	30	31	31	31	31	30
Cloudier (%)	68	68	68	68	67	67	68	67	67	67	66	67	67	67	67	67	67	67	67	67	67	67	68	69	69	70	69	69	69	69	70

	Clearer (%)	Cloudier (%)
1	32	68
2	32	68
3	32	68
4	32	68
5	33	67
6	33	67
7	32	68
8	33	67
9	33	67
10	33	67
11	34	66
12	33	67
13	33	67
14	33	67
15	33	67
16	33	67
17	33	67
18	33	67
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	31	69
26	30	70
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

Chance of precipitation in December

Any precipitation

Río Grande gets around 42 mm of rain over 10.3 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 34% and peaks near 39% on the wettest days. 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	31
Rain chance (%)	30	31	31	31	31	31	32	32	32	33	33	33	34	34	34	35	35	35	35	34	34	34	35	35	35	35	36	37	37	38	39

	Rain chance (%)
1	30
2	31
3	31
4	31
5	31
6	31
7	32
8	32
9	32
10	33
11	33
12	33
13	34
14	34
15	34
16	35
17	35
18	35
19	35
20	34
21	34
22	34
23	35
24	35
25	35
26	35
27	36
28	37
29	37
30	38
31	39

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 29 km/h in December.

Across December, daily wind ranges from about 28 km/h on the calmest days to 29 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)	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	28	28	28	28	28	28	28
Feels	windy	windy	windy	windy	windy	windy	windy	windy	windy	windy	windy	windy	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	29	windy
2	29	windy
3	29	windy
4	29	windy
5	29	windy
6	29	windy
7	29	windy
8	29	windy
9	29	windy
10	29	windy
11	29	windy
12	29	windy
13	29	breezy
14	29	breezy
15	29	breezy
16	29	breezy
17	29	breezy
18	29	breezy
19	29	breezy
20	29	breezy
21	29	breezy
22	29	breezy
23	29	breezy
24	29	breezy
25	28	breezy
26	28	breezy
27	28	breezy
28	28	breezy
29	28	breezy
30	28	breezy
31	28	breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 16 h 24 min at the start of December to 16 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over December. Sunrise moves from 5:07 AM to 5:11 AM, and sunset from 9:34 PM to 9:57 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)	16.4	16.5	16.5	16.5	16.6	16.6	16.6	16.7	16.7	16.7	16.7	16.7	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8	16.8
Sunrise (AM)	5:07	5:07	5:06	5:05	5:05	5:04	5:04	5:04	5:03	5:03	5:03	5:03	5:03	5:03	5:03	5:03	5:03	5:03	5:03	5:04	5:04	5:05	5:05	5:06	5:06	5:07	5:08	5:08	5:09	5:10	5:11
Sunset (PM)	9:34	9:35	9:37	9:38	9:40	9:41	9:42	9:43	9:44	9:46	9:47	9:48	9:49	9:50	9:50	9:51	9:52	9:53	9:53	9:54	9:55	9:55	9:55	9:56	9:56	9:56	9:57	9:57	9:57	9:57	9:57

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	16.4	5:07	9:34
2	16.5	5:07	9:35
3	16.5	5:06	9:37
4	16.5	5:05	9:38
5	16.6	5:05	9:40
6	16.6	5:04	9:41
7	16.6	5:04	9:42
8	16.7	5:04	9:43
9	16.7	5:03	9:44
10	16.7	5:03	9:46
11	16.7	5:03	9:47
12	16.7	5:03	9:48
13	16.8	5:03	9:49
14	16.8	5:03	9:50
15	16.8	5:03	9:50
16	16.8	5:03	9:51
17	16.8	5:03	9:52
18	16.8	5:03	9:53
19	16.8	5:03	9:53
20	16.8	5:04	9:54
21	16.8	5:04	9:55
22	16.8	5:05	9:55
23	16.8	5:05	9:55
24	16.8	5:06	9:56
25	16.8	5:06	9:56
26	16.8	5:07	9:56
27	16.8	5:08	9:57
28	16.8	5:08	9:57
29	16.8	5:09	9:57
30	16.8	5:10	9:57
31	16.8	5:11	9:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.66 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 0.63 kWh/m² to a high of 6.66 kWh/m² in December across the year — December's 6.66 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)	6.5	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.6	6.6
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	6.5	Intense
2	6.5	Intense
3	6.5	Intense
4	6.5	Intense
5	6.5	Intense
6	6.6	Intense
7	6.6	Intense
8	6.6	Intense
9	6.6	Intense
10	6.6	Intense
11	6.6	Intense
12	6.6	Intense
13	6.7	Intense
14	6.7	Intense
15	6.7	Intense
16	6.7	Intense
17	6.7	Intense
18	6.7	Intense
19	6.7	Intense
20	6.7	Intense
21	6.7	Intense
22	6.7	Intense
23	6.7	Intense
24	6.7	Intense
25	6.7	Intense
26	6.7	Intense
27	6.7	Intense
28	6.7	Intense
29	6.7	Intense
30	6.6	Intense
31	6.6	Intense

Planning a trip in December

Is December a good time to visit Río Grande?

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

2.9

Sightseeing

3rd-best month of the year

—

Beach & pool

never really warm enough

December is a weaker month for outdoor sightseeing in Río Grande.

What to pack for Río Grande in December

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

In December, Río Grande sees daytime highs around 12°C and nights near 7°C. Pack a warm layer, sun protection and a windbreaker. Worth having: rain gear. About 10 days see rain.

a warm layersun protectiona windbreakerrain gear

Sea temperature near Río Grande in December

The nearest coast averages about 9°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in February at about 11°C and coldest in August near 4°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	10	11	10	9	8	6	5	4	4	5	7	9
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	10	Bracing
Feb	11	Bracing
Mar	10	Bracing
Apr	9	Bracing
May	8	Bracing
Jun	6	Bracing
Jul	5	Bracing
Aug	4	Bracing
Sep	4	Bracing
Oct	5	Bracing
Nov	7	Bracing
Dec	9	Bracing

UV index in Río Grande in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Río Grande peaks around January 13 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	8	7	4	2	1	0	1	1	2	4	6	8
Level	Very high	Very high	Moderate	Low	Low	Low	Low	Low	Moderate	Moderate	High	Very high

	UV index (midday)	Level
Jan	8	Very high
Feb	7	Very high
Mar	4	Moderate
Apr	2	Low
May	1	Low
Jun	0	Low
Jul	1	Low
Aug	1	Low
Sep	2	Moderate
Oct	4	Moderate
Nov	6	High
Dec	8	Very high

Location & terrain

Where is Río Grande?

Río Grande sits at 53.8°S, 67.7°W, 9 m above sea level, in Argentina. The nearest listed city is Ushuaia, 120 km away.

Topography around Río Grande

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

Within 3 km, the terrain around Río Grande has only modest variations in elevation — a maximum elevation change of 20 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 102 m; within 80 km, large variations in elevation — a maximum elevation change of 953 m.

The land around Río Grande is covered by water (37%), artificial surfaces (29%) and grassland (26%) within 3 km, grassland (48%) and water (48%) within 16 km, and grassland (51%) and water (30%) within 80 km.

3 km

20 m

water 37%

16 km

102 m

grassland 48%

80 km

953 m

grassland 51%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← November Río Grande year-round climate January →Best places to visit in December

December weather nearby: Ushuaia 120 km · Punta Arenas 223 km · Río Gallegos 262 km · Puerto Natales 395 km · El Calafate 494 km · El Chalten 611 km · Puerto Deseado 683 km · Stanley 702 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 Río Grande (-53.7877°, -67.7097°, elevation 9 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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	11	6
2	11	6
3	11	6
4	11	7
5	11	7
6	11	7
7	11	7
8	11	7
9	11	7
10	11	7
11	12	7
12	12	7
13	12	7
14	12	7
15	12	7
16	12	7
17	12	7
18	12	7
19	12	7
20	12	7
21	12	7
22	12	7
23	12	7
24	12	7
25	12	7
26	12	7
27	12	7
28	12	7
29	12	7
30	12	8
31	12	8

	Clearer (%)	Cloudier (%)
1	32	68
2	32	68
3	32	68
4	32	68
5	33	67
6	33	67
7	32	68
8	33	67
9	33	67
10	33	67
11	34	66
12	33	67
13	33	67
14	33	67
15	33	67
16	33	67
17	33	67
18	33	67
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	31	69
26	30	70
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)
1	30
2	31
3	31
4	31
5	31
6	31
7	32
8	32
9	32
10	33
11	33
12	33
13	34
14	34
15	34
16	35
17	35
18	35
19	35
20	34
21	34
22	34
23	35
24	35
25	35
26	35
27	36
28	37
29	37
30	38
31	39

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

	Clearer (%)	Cloudier (%)
1	32	68
2	32	68
3	32	68
4	32	68
5	33	67
6	33	67
7	32	68
8	33	67
9	33	67
10	33	67
11	34	66
12	33	67
13	33	67
14	33	67
15	33	67
16	33	67
17	33	67
18	33	67
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	31	69
26	30	70
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)
1	30
2	31
3	31
4	31
5	31
6	31
7	32
8	32
9	32
10	33
11	33
12	33
13	34
14	34
15	34
16	35
17	35
18	35
19	35
20	34
21	34
22	34
23	35
24	35
25	35
26	35
27	36
28	37
29	37
30	38
31	39

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

	Clearer (%)	Cloudier (%)
1	32	68
2	32	68
3	32	68
4	32	68
5	33	67
6	33	67
7	32	68
8	33	67
9	33	67
10	33	67
11	34	66
12	33	67
13	33	67
14	33	67
15	33	67
16	33	67
17	33	67
18	33	67
19	33	67
20	33	67
21	33	67
22	33	67
23	32	68
24	31	69
25	31	69
26	30	70
27	31	69
28	31	69
29	31	69
30	31	69
31	30	70

	Rain chance (%)
1	30
2	31
3	31
4	31
5	31
6	31
7	32
8	32
9	32
10	33
11	33
12	33
13	34
14	34
15	34
16	35
17	35
18	35
19	35
20	34
21	34
22	34
23	35
24	35
25	35
26	35
27	36
28	37
29	37
30	38
31	39

	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