San Pedro weather in December

In December, San Pedro sees average daytime highs of 29°C and overnight lows near 19°C, with 201 mm of rain across 17.4 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 29% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is San Pedro's 10th-clearest and 9th-windiest month. For the whole year in context, see San Pedro's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
19°
10th coldest
Rainfall
201 mm
17.4 wet days
Daylight
13 h 42 min
5:43 AM – 7:22 PM
Cloud cover
61%
10th clearest
Wind
9 km/h
9th windiest
Solar energy
6.25 kWh/m²
Travel score
4.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in San Pedro reaches about 29°C in the afternoon and slips back to 19°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12818
22818
32818
42818
52818
62818
72918
82918
92918
102918
112918
122919
132919
142919
152919
162919
172919
182919
192919
202919
212919
222919
232919
242919
252919
262919
272919
282919
292919
302919
312919

San Pedro 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
Jan29° / 20°18619.313.54.3
Feb28° / 19°17517.812.94.5
Mar28° / 18°16115.512.25.5
Apr25° / 16°15211.611.46.6
May21° / 13°16210.510.76.6
Jun20° / 12°1639.810.46.4
Jul20° / 11°1409.710.56.6
Aug23° / 13°1087.711.17.5
Sep24° / 14°18011.511.86.9
Oct26° / 16°2341512.65.9
Nov27° / 17°17513.613.35.9
Dec29° / 19°20117.413.64.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24852
34951
44852
54951
64951
74852
84951
94951
105050
115050
125149
135149
145149
155149
165149
175149
185248
195248
205149
215149
225050
235050
244852
254852
264753
274753
284654
294654
304654
314753

Chance of precipitation in December

Any precipitation

San Pedro gets around 201 mm of rain over 17.4 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 56% and peaks near 62% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
150
251
351
452
552
653
753
853
953
1053
1153
1253
1354
1454
1554
1655
1755
1855
1955
2056
2157
2257
2358
2459
2560
2660
2761
2861
2961
3062
3162

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 47% 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 (%)
181532414
271532425
371431435
471431435
571431445
661330456
761329456
861329466
961328476
1051328477
1151328477
1251328487
1341227488
1441227488
1541227499
1631227499
17312274910
18311264911
19311264912
20211254813
21210254814
22210244815
23210244816
2429234818
2519234819
2618234820
2718224721
2818224722
2917224723
3017224624
3117224624

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 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 5:40 AM to 5:50 AM, and sunset from 7:13 PM to 7:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:407:13
213.65:407:13
313.65:407:14
413.65:407:15
513.65:407:16
613.65:407:16
713.65:407:17
813.65:407:18
913.65:417:18
1013.65:417:19
1113.65:417:20
1213.65:417:20
1313.75:427:21
1413.75:427:21
1513.75:427:22
1613.75:437:22
1713.75:437:23
1813.75:437:24
1913.75:447:24
2013.75:447:25
2113.75:457:25
2213.75:457:26
2313.75:467:26
2413.75:467:27
2513.75:477:27
2613.75:477:27
2713.75:487:28
2813.75:487:28
2913.75:497:28
3013.75:497:29
3113.75:507:29

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.25 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 6.25 kWh/m² in December across the year — December's 6.25 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in December

Is December a good time to visit San Pedro?

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

4.7
Sightseeing
10th-best month of the year
5.9
Beach & pool
5th-best month of the year

December is a reasonable time to visit San Pedro for sightseeing.

What to pack for San Pedro in December

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

In December, San Pedro sees daytime highs around 29°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in San Pedro 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 Pedro peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 21UV 14Jun 22UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun4Moderate
Jul5Moderate
Aug6High
Sep7Very high
Oct9Very high
Nov11Extreme
Dec13Extreme

Air quality in San Pedro 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 Pedro is worst in September — around 24 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1023 µg/m³Mar 176 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May6Good
Jun6Good
Jul10Good
Aug22Moderate
Sep24Moderate
Oct12Good
Nov9Good
Dec7Good
Location & terrain

Where is San Pedro?

San Pedro sits at 26.6°S, 54.1°W, 554 m above sea level, in Argentina. The nearest listed city is San Vicente, 2.0 km away.

Topography around San Pedro

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

Within 3 km, the terrain around San Pedro has only modest variations in elevation — a maximum elevation change of 122 m around an average of 557 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 471 m; within 80 km, large variations in elevation — a maximum elevation change of 817 m.

The land around San Pedro is covered by trees (76%) within 3 km, trees (87%) within 16 km, and trees (83%) within 80 km.

3 km
122 m
16 km
471 m
80 km
817 m
treesgrasslandcroplandartificial surfaces
December weather nearby: San Vicente 2.0 km · Eldorado 56 km · São Miguel d'Oeste 60 km · Dionísio Cerqueira 62 km · Montecarlo 65 km · Santo Antônio do Sudoeste 72 km · Itapiranga 72 km · El Soberbio 76 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 Pedro (-26.6218°, -54.109°, elevation 554 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).