General Roca weather in December

In December, General Roca sees average daytime highs of 29°C and overnight lows near 16°C, with 16 mm of rain across 2.7 wet days and about 14.7 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 31°C by the end. The sky is clear or mostly clear about 69% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 30 min at the start of December to 14 h 42 min by month's end. Set against the rest of the year, December is General Roca's 3rd-clearest and 1st-windiest month. For the whole year in context, see General Roca's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
16 mm
2.7 wet days
Daylight
14 h 42 min
6:05 AM – 8:48 PM
Cloud cover
29%
3rd clearest
Wind
17 km/h
1st windiest
Solar energy
8.56 kWh/m²
Travel score
6.7
out of 10

General Roca is city and municipality in Río Negro Province, Argentina.

Density
149/km²
people per km²
Founded
1879

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 31°C by the end.

A typical December day in General Roca reaches about 29°C in the afternoon and slips back to 16°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 34°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
12814
22814
32814
42815
52815
62815
72815
82915
92915
102915
112915
122915
132915
142916
152916
163016
173016
183016
193016
203016
213016
223016
233016
243117
253117
263117
273117
283117
293117
303117
313117

How December really feels in General Roca

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

General Roca 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 17°183.114.45.7
Feb30° / 17°22313.56.6
Mar26° / 14°253.512.38.1
Apr21° / 293.6117.8
May16° / 274.99.95.7
Jun13° / 204.49.33.9
Jul12° / 193.69.53.9
Aug15° / 142.910.55.4
Sep18° / 213.511.77.0
Oct22° / 10°364.3137.8
Nov26° / 13°223.214.18.0
Dec29° / 16°162.714.76.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
28119
38119
48119
58119
68119
78119
88119
98218
108218
118119
128218
138218
148317
158317
168317
178416
188416
198416
208515
218515
228515
238515
248515
258515
268515
278515
288515
298515
308416
318416

Chance of precipitation in December

Any precipitation

General Roca gets around 16 mm of rain over 2.7 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 8% and peaks near 10% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
19
29
39
49
59
610
710
810
910
1010
119
129
139
149
158
168
177
187
197
207
217
227
237
247
257
268
278
288
298
309
319

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29820
39820
49820
59820
69820
79820
89721
99721
109631
119631
129631
139631
149631
159631
169631
179631
189631
199631
209631
219631
229631
239541
249442
259442
269442
279442
289253
299253
309253
319253

Wind in December

Winds average 17 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 17 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 30 min at the start of December to 14 h 42 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 6:04 AM to 6:12 AM, and sunset from 8:36 PM to 8:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.56:048:36
214.66:048:37
314.66:048:38
414.66:038:39
514.66:038:40
614.66:038:41
714.66:038:42
814.76:038:42
914.76:038:43
1014.76:048:44
1114.76:048:45
1214.76:048:46
1314.76:048:46
1414.76:048:47
1514.76:048:48
1614.76:058:48
1714.76:058:49
1814.76:058:50
1914.76:068:50
2014.76:068:51
2114.76:078:51
2214.76:078:52
2314.76:078:52
2414.76:088:53
2514.76:098:53
2614.76:098:53
2714.76:108:54
2814.76:108:54
2914.76:118:54
3014.76:128:54
3114.76:128:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.56 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 8.56 kWh/m² in December across the year — December's 8.56 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.3Intense
28.4Intense
38.4Intense
48.4Intense
58.4Intense
68.4Intense
78.4Intense
88.4Intense
98.4Intense
108.5Intense
118.5Intense
128.5Intense
138.5Intense
148.5Intense
158.6Intense
168.6Intense
178.6Intense
188.6Intense
198.6Intense
208.7Intense
218.7Intense
228.7Intense
238.7Intense
248.7Intense
258.7Intense
268.7Intense
278.7Intense
288.7Intense
298.7Intense
308.7Intense
318.7Intense
Planning a trip in December

Is December a good time to visit General Roca?

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

6.7
Sightseeing
6th-best month of the year
8.5
Beach & pool
2nd-best month of the year

December is a reasonable time to visit General Roca for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for General Roca in December

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

In December, General Roca sees daytime highs around 29°C and nights near 16°C. Pack light clothes and sun protection.

light clothessun protection

UV index in General Roca in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in General Roca peaks around December 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 20UV 13Jun 23UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar8Very high
Apr5High
May3Moderate
Jun2Low
Jul2Low
Aug3Moderate
Sep5Moderate
Oct8Very high
Nov10Extreme
Dec13Extreme
Location & terrain

Where is General Roca?

General Roca sits at 39.0°S, 67.6°W, 237 m above sea level, in Argentina. The nearest listed city is Allen, 22 km away.

Topography around General Roca

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

Within 3 km, the terrain around General Roca has only modest variations in elevation — a maximum elevation change of 41 m around an average of 238 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 251 m; within 80 km, large variations in elevation — a maximum elevation change of 764 m.

The land around General Roca is covered by artificial surfaces (49%) within 3 km, shrubs (61%) within 16 km, and shrubs (89%) within 80 km.

3 km
41 m
16 km
251 m
80 km
764 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Allen 22 km · Cipolletti 37 km · Neuquén 42 km · Villa Regina 44 km · Cinco Saltos 48 km · Centenario 53 km · Plottier 57 km · Catriel 130 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
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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 General Roca (-39.0333°, -67.5833°, elevation 237 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).