Gualeguay weather in May

In May, Gualeguay sees average daytime highs of 20°C and overnight lows near 10°C, with 75 mm of rain across 6.1 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 18°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 10 hours by month's end. Set against the rest of the year, May is Gualeguay's 12th-clearest and 10th-windiest month. For the whole year in context, see Gualeguay's year-round climate.

Daytime high
20°
9th warmest
Overnight low
10°
5th coldest
Rainfall
75 mm
6.1 wet days
Daylight
10 h 18 min
7:45 AM – 6:02 PM
Cloud cover
56%
12th clearest
Wind
11 km/h
10th windiest
Solar energy
2.72 kWh/m²
Travel score
6.8
out of 10

Gualeguay is city in Entre Ríos Province, Argentina.

Founded
1783

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 18°C by the end.

A typical May day in Gualeguay reaches about 20°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 25°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)
12212
22112
32111
42111
52111
62111
72111
82111
92111
102011
112011
122011
132011
142011
152011
162010
172010
181910
191910
201910
211910
221910
231910
241910
25189
26189
27189
28189
29189
30189
31189

Gualeguay 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°1077.413.95.3
Feb29° / 18°1108.113.25.8
Mar27° / 17°1227.812.37.0
Apr23° / 13°1118.211.27.3
May20° / 10°756.110.36.8
Jun17° / 576.49.95.8
Jul16° / 535.4105.7
Aug18° / 715.910.86.7
Sep21° / 10°786.811.87.0
Oct23° / 13°1199.812.87.1
Nov26° / 15°1097.413.77.1
Dec29° / 17°1209.114.15.8

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 14% of May, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55446
65446
75446
85446
95347
105248
115248
125149
135149
145050
154951
164951
174852
184753
194753
204753
214753
224654
234654
244654
254555
264555
274654
284654
294753
304654
314753

Chance of precipitation in May

Any precipitation

Gualeguay gets around 75 mm of rain over 6.1 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 20% and peaks near 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
124
223
323
423
522
622
721
821
921
1020
1120
1220
1320
1420
1520
1620
1720
1820
1920
2020
2119
2219
2319
2419
2519
2618
2718
2818
2918
3018
3118

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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15922145
26022135
36121135
46121135
56221125
66221125
76221125
86321115
96321115
106421114
116421114
126421114
136520114
146520114
156620113
166619123
176619123
186718123
196817123
206917122
217016122
227115122
237214122
247314112
257413112
267513102
277513102
28771292
29781282
30781282
31801271

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 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over May. Sunrise moves from 7:33 AM to 7:55 AM, and sunset from 6:16 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.77:336:16
210.77:346:15
310.67:356:14
410.67:366:13
510.67:366:12
610.67:376:11
710.57:386:10
810.57:396:09
910.57:396:08
1010.47:406:07
1110.47:416:06
1210.47:426:05
1310.47:426:05
1410.37:436:04
1510.37:446:03
1610.37:456:02
1710.37:456:02
1810.27:466:01
1910.27:476:00
2010.27:486:00
2110.27:485:59
2210.27:495:58
2310.17:505:58
2410.17:505:57
2510.17:515:57
2610.17:525:56
2710.17:525:56
2810.07:535:56
2910.07:545:55
3010.07:545:55
3110.07:555:54

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.72 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 7.33 kWh/m² in December across the year — May's 2.72 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
212.6Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.4Moderate
312.4Moderate
Planning a trip in May

Is May a good time to visit Gualeguay?

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

6.8
Sightseeing
6th-best month of the year
3.3
Beach & pool
9th-best month of the year

May is a reasonable time to visit Gualeguay for sightseeing.

What to pack for Gualeguay in May

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

In May, Gualeguay sees daytime highs around 20°C and nights near 10°C. Little to plan around — just the basics. About 6 days see rain.

UV index in Gualeguay 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 Gualeguay 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
Mar10Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Gualeguay 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 Gualeguay is worst in August — around 19 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (April, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1718 µg/m³Apr 145 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb6Good
Mar6Good
Apr5Good
May7Good
Jun7Good
Jul12Good
Aug19Moderate
Sep12Good
Oct10Good
Nov6Good
Dec6Good
Location & terrain

Where is Gualeguay?

Gualeguay sits at 33.1°S, 59.3°W, 13 m above sea level, in Argentina. The nearest listed city is San Pedro, 68 km away.

Topography around Gualeguay

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

Within 3 km, the terrain around Gualeguay has only modest variations in elevation — a maximum elevation change of 24 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 59 m; within 80 km, only modest variations in elevation — a maximum elevation change of 95 m.

The land around Gualeguay is covered by grassland (60%) and artificial surfaces (23%) within 3 km, grassland (60%) and cropland (29%) within 16 km, and wetland (33%), cropland (32%) and grassland (29%) within 80 km.

3 km
24 m
16 km
59 m
80 km
95 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: San Pedro 68 km · Ramallo 75 km · Gualeguaychú 75 km · Baradero 77 km · San Nicolás de los Arroyos 86 km · Fray Bentos 93 km · Nogoyá 94 km · Villa Constitución 95 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 Gualeguay (-33.1409°, -59.3126°, elevation 13 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).