Zárate weather in December

In December, Zárate sees average daytime highs of 28°C and overnight lows near 17°C, with 104 mm of rain across 8.7 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 4th-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 50% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Zárate's 2nd-clearest and 5th-windiest month. For the whole year in context, see Zárate's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
104 mm
8.7 wet days
Daylight
14 h 18 min
5:44 AM – 8:00 PM
Cloud cover
43%
2nd clearest
Wind
12 km/h
5th windiest
Solar energy
7.42 kWh/m²
Travel score
6.3
out of 10

Zárate is city in Buenos Aires Province, Argentina.

Founded
1854

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 Zárate reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°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)
12716
22716
32716
42716
52716
62716
72816
82816
92817
102817
112817
122817
132817
142817
152817
162817
172817
182917
192918
202918
212918
222918
232918
242918
252918
262918
272918
282919
292919
302919
312919

Zárate weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°957.7145.7
Feb28° / 18°1108.613.36.1
Mar26° / 16°1087.512.37.2
Apr23° / 13°103811.27.3
May19° / 10°705.810.36.6
Jun16° / 566.29.85.5
Jul15° / 595.9105.2
Aug18° / 69610.76.3
Sep20° / 756.511.86.8
Oct22° / 12°1319.312.97.0
Nov26° / 15°1037.713.87.3
Dec28° / 17°1048.714.26.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 (%)
16238
26238
36337
46337
56436
66436
76535
86535
96535
106535
116535
126535
136535
146535
156535
166634
176634
186634
196634
206634
216535
226535
236535
246535
256535
266436
276436
286436
296436
306436
316436

Chance of precipitation in December

Any precipitation

Zárate gets around 104 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 (%)
125
225
325
426
526
626
726
826
927
1027
1127
1228
1328
1429
1529
1629
1730
1830
1930
2030
2130
2229
2329
2429
2529
2629
2728
2828
2928
3028
3127

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1332927111
2332827111
3332827111
4322827111
5322728112
6322728122
7312628122
8312629122
9302629132
10292630132
11282631132
12272631142
13262532142
14252532152
15242533153
16242433163
17232334173
18222334183
19212234194
20202234214
21192133225
22182133235
23172032256
24162031266
25152031277
26152030287
27141929298
28131928309
29131928319
301219273210
311119273210

Wind in December

Winds average 12 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.

051015151015202531
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
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light 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 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:43 AM to 5:52 AM, and sunset from 7:49 PM to 8:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:437:49
214.15:437:50
314.15:427:51
414.25:427:52
514.25:427:52
614.25:437:53
714.25:437:54
814.25:437:55
914.25:437:55
1014.25:437:56
1114.25:437:57
1214.25:437:58
1314.25:447:58
1414.35:447:59
1514.35:447:59
1614.35:448:00
1714.35:458:01
1814.35:458:01
1914.35:458:02
2014.35:468:02
2114.35:468:03
2214.35:478:03
2314.35:478:04
2414.35:488:04
2514.35:488:05
2614.35:498:05
2714.35:498:05
2814.35:508:06
2914.35:518:06
3014.35:518:06
3114.25:528:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.42 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.42 kWh/m² in December across the year — December's 7.42 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
247.3Intense
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 Zárate?

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

6.3
Sightseeing
7th-best month of the year
7.3
Beach & pool
2nd-best month of the year

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

What to pack for Zárate in December

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

In December, Zárate sees daytime highs around 28°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

Sea temperature near Zárate in December

The nearest coast averages about 23°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 60 km away) is warmest in January at about 25°C and coldest in July near 13°C.

It's comfortable for a long swim from Nov 8 to Apr 22 — about 5.5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar24Refreshing
Apr21Refreshing
May17Cool
Jun14Bracing
Jul13Bracing
Aug14Bracing
Sep15Cool
Oct18Cool
Nov21Refreshing
Dec23Refreshing

UV index in Zárate 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 Zárate 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
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Zárate 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 Zárate is worst in August — around 22 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (April, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1721 µg/m³Apr 157 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb8Good
Mar9Good
Apr7Good
May9Good
Jun10Good
Jul13Moderate
Aug22Moderate
Sep14Moderate
Oct12Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Zárate?

Zárate sits at 34.1°S, 59.0°W, 27 m above sea level, in Argentina. The nearest listed city is Campana, 10 km away.

Topography around Zárate

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

Within 3 km, the terrain around Zárate has only modest variations in elevation — a maximum elevation change of 42 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 57 m; within 80 km, only modest variations in elevation — a maximum elevation change of 83 m.

The land around Zárate is covered by artificial surfaces (42%) within 3 km, wetland (30%), grassland (23%) and cropland (23%) within 16 km, and cropland (30%) and wetland (29%) within 80 km.

3 km
42 m
16 km
57 m
80 km
83 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Campana 10 km · Pilar 42 km · San Antonio de Areco 44 km · Tortuguitas 49 km · Ingeniero Pablo Nogués 52 km · José C. Paz 52 km · General Pacheco 53 km · Luján 53 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 Zárate (-34.0958°, -59.0242°, elevation 27 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. 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).