Salto weather in December

In December, Salto sees average daytime highs of 28°C and overnight lows near 16°C, with 101 mm of rain across 8.7 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 52% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is Salto's 2nd-clearest and 6th-windiest month. For the whole year in context, see Salto's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
16°
10th coldest
Rainfall
101 mm
8.7 wet days
Daylight
14 h 18 min
5:49 AM – 8:06 PM
Cloud cover
43%
2nd clearest
Wind
13 km/h
6th windiest
Solar energy
7.41 kWh/m²
Travel score
6.3
out of 10

Salto is city in Buenos Aires province, Argentina.

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 27°C in the first days to 29°C by the end.

A typical December day in Salto reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52815
62815
72816
82816
92816
102816
112816
122816
132816
142816
152816
162916
172917
182917
192917
202917
212917
222917
232917
242917
252917
262917
272918
282918
292918
302918
312918

Salto weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°1008.4145.8
Feb28° / 17°1058.513.36.5
Mar26° / 15°96812.37.2
Apr23° / 12°998.311.27.3
May19° / 656.410.26.5
Jun16° / 475.39.85.4
Jul15° / 395.19.95.1
Aug17° / 575.210.76.4
Sep20° / 686.311.86.9
Oct23° / 11°1239.712.96.9
Nov26° / 14°99813.87.2
Dec28° / 16°1018.714.26.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% 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 35%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56535
66535
76535
86634
96634
106634
116733
126733
136733
146733
156733
166634
176634
186634
196634
206634
216634
226535
236535
246535
256535
266535
276436
286535
296535
306535
316535

Chance of precipitation in December

Any precipitation

Salto gets around 101 mm of rain over 8.7 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
226
326
426
526
626
726
827
927
1027
1127
1228
1328
1429
1529
1630
1730
1830
1930
2030
2130
2230
2330
2430
2529
2629
2729
2829
2928
3028
3128

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
144282250
244282250
343282360
442282360
541282461
640282561
739282561
838292671
937292671
1036302771
1134302771
1233312881
1331312881
1430312991
15293129101
16273129102
17263130112
18253030132
19243030142
20232930153
21222929173
22212829183
23202729204
24202728214
25192628225
26192528235
27182428256
28172427256
29172327266
30162327276
31162327287

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 18 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 5:47 AM to 5:56 AM, and sunset from 7:54 PM to 8:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:477:54
214.15:477:55
314.25:477:56
414.25:477:57
514.25:477:58
614.25:477:59
714.25:477:59
814.25:478:00
914.25:478:01
1014.25:478:02
1114.25:488:02
1214.35:488:03
1314.35:488:04
1414.35:488:04
1514.35:498:05
1614.35:498:06
1714.35:498:06
1814.35:508:07
1914.35:508:07
2014.35:508:08
2114.35:518:08
2214.35:518:09
2314.35:528:09
2414.35:528:10
2514.35:538:10
2614.35:538:10
2714.35:548:11
2814.35:548:11
2914.35:558:11
3014.35:568:12
3114.35:568:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.41 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 7.41 kWh/m² in December across the year — December's 7.41 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.4Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.4Intense
177.4Intense
187.4Intense
197.4Intense
207.4Intense
217.4Intense
227.4Intense
237.4Intense
247.4Intense
257.3Intense
267.3Intense
277.3Intense
287.3Intense
297.3Intense
307.3Intense
317.3Intense
Planning a trip in December

Is December a good time to visit Salto?

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

6.3
Sightseeing
9th-best month of the year
7.4
Beach & pool
2nd-best month of the year

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

What to pack for Salto in December

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

In December, Salto sees daytime highs around 28°C and nights near 16°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Salto 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 Salto peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Salto in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Salto is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (April, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1715 µg/m³Apr 186 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar8Good
Apr6Good
May7Good
Jun8Good
Jul10Good
Aug16Moderate
Sep10Good
Oct9Good
Nov7Good
Dec7Good
Location & terrain

Where is Salto?

Salto sits at 34.3°S, 60.3°W, 31 m above sea level, in Argentina. The nearest listed city is Arrecifes, 29 km away.

Topography around Salto

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

Within 3 km, the terrain around Salto has only modest variations in elevation — a maximum elevation change of 31 m around an average of 48 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 65 m; within 80 km, only modest variations in elevation — a maximum elevation change of 104 m.

The land around Salto is covered by cropland (53%) and artificial surfaces (24%) within 3 km, cropland (93%) within 16 km, and cropland (89%) within 80 km.

3 km
31 m
16 km
65 m
80 km
104 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Arrecifes 29 km · Carmen de Areco 41 km · Chacabuco 44 km · Rojas 45 km · Pergamino 53 km · Chivilcoy 71 km · Junín 72 km · San Antonio de Areco 72 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 Salto (-34.2918°, -60.2545°, elevation 31 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).