San Lorenzo weather in December

In December, San Lorenzo sees average daytime highs of 31°C and overnight lows near 20°C, with 160 mm of rain across 10 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 30°C in the first days to 32°C by the end. The sky is clear or mostly clear about 43% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is San Lorenzo's 6th-clearest and 7th-windiest month. For the whole year in context, see San Lorenzo's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
20°
10th coldest
Rainfall
160 mm
10 wet days
Daylight
13 h 48 min
5:58 AM – 7:45 PM
Cloud cover
49%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
6.93 kWh/m²
Travel score
4.6
out of 10

San Lorenzo 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

Highs climb over the month, from about 30°C in the first days to 32°C by the end.

A typical December day in San Lorenzo reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
63019
73020
83020
93120
103120
113120
123120
133120
143120
153120
163120
173120
183121
193121
203121
213221
223221
233221
243221
253221
263221
273221
283221
293221
303221
313221

How December really feels in San Lorenzo

Once humidity and wind are folded in, December averages 18 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
18
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Lorenzo weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 22°1481113.64.1
Feb31° / 21°13610.1134.5
Mar29° / 20°14310.212.25.4
Apr26° / 17°1689.811.36.8
May23° / 14°1127.810.67.2
Jun20° / 12°807.810.26.7
Jul20° / 10°717.210.47.0
Aug23° / 11°756.7117.6
Sep25° / 13°1098.411.87.4
Oct27° / 16°1911112.76.5
Nov29° / 18°160913.45.9
Dec31° / 20°1601013.84.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
25941
36040
46040
56040
66040
76040
86040
96040
106040
116139
126139
136139
146139
156238
166238
176238
186238
196139
206139
216139
226139
236139
245941
255941
265941
275842
285842
295842
305743
315743

Chance of precipitation in December

Any precipitation

San Lorenzo gets around 160 mm of rain over 10 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 32% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
131
231
331
431
530
630
730
830
930
1030
1130
1230
1330
1431
1531
1632
1732
1833
1933
2034
2134
2234
2335
2435
2535
2635
2735
2835
2934
3034
3134

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
110152928172
29152928182
39142927182
49142927192
59142927202
69142827202
79142827212
89142727212
98142727222
108142628222
118142628222
127142528232
137142529232
147142429243
156142429243
166132329253
176132330254
185132230264
195132229274
205122229275
214122129285
224122129296
234112028306
244112028316
253102028326
263102027337
273101927347
28391927348
29391926358
30391926358
31391926368

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
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 5:55 AM to 6:05 AM, and sunset from 7:35 PM to 7:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:557:35
213.75:557:35
313.75:557:36
413.75:557:37
513.75:557:37
613.75:557:38
713.75:567:39
813.75:567:40
913.75:567:40
1013.75:567:41
1113.85:567:41
1213.85:577:42
1313.85:577:43
1413.85:577:43
1513.85:587:44
1613.85:587:45
1713.85:587:45
1813.85:597:46
1913.85:597:46
2013.86:007:47
2113.86:007:47
2213.86:007:48
2313.86:017:48
2413.86:017:49
2513.86:027:49
2613.86:027:49
2713.86:037:50
2813.86:047:50
2913.86:047:50
3013.86:057:51
3113.86:057:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.93 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 6.93 kWh/m² in December across the year — December's 6.93 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.9Intense
86.9Intense
96.9Intense
106.9Intense
116.9Intense
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
307.0Intense
317.0Intense
Planning a trip in December

Is December a good time to visit San Lorenzo?

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

4.6
Sightseeing
10th-best month of the year
6.8
Beach & pool
3rd-best month of the year

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

What to pack for San Lorenzo in December

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

In December, San Lorenzo sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in San Lorenzo 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 San Lorenzo peaks around January 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 24UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct6High
Nov11Extreme
Dec13Extreme

Air quality in San Lorenzo 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 San Lorenzo is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (May, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodAug 2115 µg/m³May 146 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar7Good
Apr7Good
May6Good
Jun7Good
Jul9Good
Aug16Moderate
Sep14Moderate
Oct9Good
Nov7Good
Dec6Good
Location & terrain

Where is San Lorenzo?

San Lorenzo sits at 28.1°S, 58.8°W, 63 m above sea level, in Argentina. The nearest listed city is Saladas, 19 km away.

Topography around San Lorenzo

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

Within 3 km, the terrain around San Lorenzo has only modest variations in elevation — a maximum elevation change of 23 m around an average of 61 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 43 m; within 80 km, only modest variations in elevation — a maximum elevation change of 75 m.

The land around San Lorenzo is covered by grassland (59%) and trees (33%) within 3 km, grassland (57%) and trees (23%) within 16 km, and grassland (44%), trees (24%) and wetland (24%) within 80 km.

3 km
23 m
16 km
43 m
80 km
75 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Saladas 19 km · Villa Ocampo 70 km · San Luis del Palmar 73 km · Corrientes 74 km · Barranqueras 75 km · Resistencia 78 km · Fontana 84 km · Goya 122 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 San Lorenzo (-28.1344°, -58.7668°, elevation 63 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).