San Pedro weather in May

In May, San Pedro sees average daytime highs of 19°C and overnight lows near 10°C, with 68 mm of rain across 6 wet days and about 10.3 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 36% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of May to 9 h 54 min by month's end. Set against the rest of the year, May is San Pedro's 12th-clearest and 10th-windiest month. For the whole year in context, see San Pedro's year-round climate.

Daytime high
19°
9th warmest
Overnight low
10°
5th coldest
Rainfall
68 mm
6 wet days
Daylight
10 h 18 min
7:47 AM – 6:03 PM
Cloud cover
56%
12th clearest
Wind
11 km/h
10th windiest
Solar energy
2.71 kWh/m²
Travel score
6.7
out of 10

San Pedro is city in the province of Buenos Aires in Argentina.

Founded
1907

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 17°C by the end.

A typical May day in San Pedro reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12111
22111
32111
42111
52111
62111
72011
82011
92011
102011
112011
122011
132010
141910
151910
161910
171910
181910
191910
201910
211810
22189
23189
24189
25189
26189
27189
28189
29179
30178
31178

San Pedro weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 19°978.1145.5
Feb29° / 18°1118.313.36.0
Mar27° / 16°1057.412.37.2
Apr23° / 13°1038.211.27.3
May19° / 10°68610.36.7
Jun16° / 485.59.85.6
Jul15° / 485.6105.3
Aug18° / 625.510.76.5
Sep20° / 686.311.87.0
Oct23° / 12°1229.712.87.0
Nov26° / 15°1057.813.77.2
Dec29° / 17°104914.26.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of May, 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 (%)
15644
25545
35545
45545
55446
65446
75347
85347
95248
105149
115149
125050
134951
144852
154753
164654
174555
184654
194654
204456
214456
224555
234555
244555
254555
264555
274753
284753
294753
304852
314852

Chance of precipitation in May

Any precipitation

San Pedro gets around 68 mm of rain over 6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
123
223
323
422
522
621
721
820
920
1019
1119
1219
1319
1419
1519
1619
1719
1819
1919
2019
2119
2219
2319
2419
2518
2618
2718
2818
2917
3017
3117

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16121144
26221134
36320134
46320134
56420124
66520114
76520114
86720103
96720103
10682093
11682093
12692083
13692083
14701983
15701983
16701992
17701992
18711892
19711892
20721792
21731692
22741592
23741592
24761491
25781381
26781381
27791371
28801271
29811261
30821161
31831151

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 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
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 42 min at the start of May to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over May. Sunrise moves from 7:36 AM to 7:58 AM, and sunset from 6:16 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.77:366:16
210.67:366:15
310.67:376:14
410.67:386:13
510.67:396:12
610.57:396:11
710.57:406:10
810.57:416:09
910.47:426:08
1010.47:436:07
1110.47:436:07
1210.47:446:06
1310.37:456:05
1410.37:466:04
1510.37:466:03
1610.37:476:03
1710.27:486:02
1810.27:496:01
1910.27:496:01
2010.27:506:00
2110.17:515:59
2210.17:525:59
2310.17:525:58
2410.17:535:58
2510.17:545:57
2610.07:545:57
2710.07:555:56
2810.07:565:56
2910.07:565:55
3010.07:575:55
319.97:585:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.71 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 7.37 kWh/m² in December across the year — May's 2.71 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.0Moderate
73.0Moderate
83.0Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.4Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in May

Is May a good time to visit San Pedro?

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

6.7
Sightseeing
6th-best month of the year
3.0
Beach & pool
9th-best month of the year

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

What to pack for San Pedro in May

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

In May, San Pedro sees daytime highs around 19°C and nights near 10°C. Little to plan around — just the basics. About 6 days see rain.

UV index in San Pedro in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Pedro 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 San Pedro in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Pedro is worst in August — around 40 µg/m³ PM2.5 (poor), about 6.5× the cleanest month (April, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodAug 1637 µg/m³Apr 156 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb7Good
Mar7Good
Apr6Good
May8Good
Jun10Good
Jul21Moderate
Aug40Poor
Sep17Moderate
Oct13Moderate
Nov8Good
Dec8Good
Location & terrain

Where is San Pedro?

San Pedro sits at 33.7°S, 59.7°W, 30 m above sea level, in Argentina. The nearest listed city is Baradero, 21 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 33 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 49 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.

The land around San Pedro is covered by artificial surfaces (27%) and wetland (24%) within 3 km, wetland (46%) and cropland (28%) within 16 km, and cropland (45%) and wetland (33%) within 80 km.

3 km
33 m
16 km
49 m
80 km
92 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Baradero 21 km · Ramallo 38 km · Arrecifes 59 km · San Nicolás de los Arroyos 63 km · San Antonio de Areco 66 km · Gualeguay 68 km · Zárate 75 km · Carmen de Areco 79 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 (-33.6792°, -59.6663°, elevation 30 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).