Río Segundo weather in December

In December, Río Segundo sees average daytime highs of 30°C and overnight lows near 18°C, with 102 mm of rain across 10.8 wet days and about 14 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of December to 14 hours by month's end. Set against the rest of the year, December is Río Segundo's 9th-clearest and 5th-windiest month. For the whole year in context, see Río Segundo's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
18°
11th coldest
Rainfall
102 mm
10.8 wet days
Daylight
14 h 06 min
6:10 AM – 8:13 PM
Cloud cover
45%
9th clearest
Wind
11 km/h
5th windiest
Solar energy
7.03 kWh/m²
Travel score
5.3
out of 10

Río Segundo is human settlement in Argentina.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Río Segundo reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 34°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12917
22917
32917
42917
52917
62917
72917
82917
92917
102917
112917
123017
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233018
243018
253019
263019
273019
283019
293019
303019
313019

Río Segundo weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°10810.113.85.3
Feb28° / 18°899.813.26.3
Mar26° / 16°899.212.27.0
Apr23° / 13°61711.27.6
May20° / 294.310.47.2
Jun17° / 153106.5
Jul16° / 122.510.16.5
Aug19° / 152.410.87.7
Sep22° / 304.411.88.0
Oct25° / 13°688.212.87.4
Nov28° / 16°839.713.66.5
Dec30° / 18°10210.8145.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 33%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26733
36832
46832
56832
66832
76832
86832
96931
106931
116832
126832
136832
146832
156832
166733
176832
186832
196832
206733
216733
226733
236634
246634
256535
266535
276535
286436
296436
306436
316436

Chance of precipitation in December

Any precipitation

Río Segundo gets around 102 mm of rain over 10.8 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 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
234
334
434
534
634
733
833
933
1033
1133
1233
1334
1434
1534
1635
1735
1835
1935
2036
2136
2236
2336
2436
2536
2636
2736
2836
2936
3035
3135

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
140292281
239292381
338292391
438292391
537292391
637292391
737282492
8362824102
9362725102
10352726112
11342626112
12332627123
13322528123
14312528133
15302529143
16292430153
17272430163
18262330174
19252331184
20242231194
21232231204
22212230224
23202230235
24192230255
25182229265
26182229275
27172228286
28162127296
29162127306
30152127316
31152126317

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 54 min at the start of December to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:08 AM to 6:18 AM, and sunset from 8:03 PM to 8:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.96:088:03
213.96:088:04
313.96:088:04
414.06:088:05
514.06:088:06
614.06:088:07
714.06:088:07
814.06:088:08
914.06:088:09
1014.06:098:10
1114.06:098:10
1214.06:098:11
1314.06:098:12
1414.06:108:12
1514.06:108:13
1614.16:108:13
1714.16:118:14
1814.16:118:15
1914.16:118:15
2014.16:128:16
2114.16:128:16
2214.16:138:17
2314.16:138:17
2414.16:148:18
2514.16:148:18
2614.16:158:18
2714.16:158:19
2814.16:168:19
2914.06:168:19
3014.06:178:20
3114.06:188:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.03 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 7.03 kWh/m² in December across the year — December's 7.03 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
67.0Intense
77.0Intense
87.0Intense
97.0Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
306.9Intense
316.9Intense
Planning a trip in December

Hazard calendar for Río Segundo

In seasonPeak

In December, Río Segundo sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Río Segundo's rainy season runs October–April, when most of the year's rain falls.

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

Is December a good time to visit Río Segundo?

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

5.3
Sightseeing
11th-best month of the year
7.0
Beach & pool
2nd-best month of the year

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

What to pack for Río Segundo in December

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

In December, Río Segundo sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Río Segundo in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (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 Segundo peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 19UV 14Jun 21UV 3
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7High
Oct10Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Río Segundo?

Río Segundo sits at 31.7°S, 63.9°W, 343 m above sea level, in Argentina. The nearest listed city is Pilar, 4.0 km away.

Topography around Río Segundo

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

Within 3 km, the terrain around Río Segundo has only modest variations in elevation — a maximum elevation change of 28 m around an average of 339 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,998 m.

The land around Río Segundo is covered by cropland (41%) and grassland (29%) within 3 km, cropland (91%) within 16 km, and cropland (74%) within 80 km.

3 km
28 m
16 km
96 m
80 km
1,998 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Pilar 4.0 km · Villa del Rosario 37 km · Cordoba 38 km · Alta Gracia 49 km · La Calera 53 km · Villa Allende 54 km · Unquillo 60 km · Villa Carlos Paz 61 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 Río Segundo (-31.6501°, -63.9117°, elevation 343 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).