Gualeguaychú weather in May

In May, Gualeguaychú sees average daytime highs of 20°C and overnight lows near 11°C, with 80 mm of rain across 6.1 wet days and about 10.3 hours of daylight. It is the 9th-warmest and 10th-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 34% 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 Gualeguaychú's 12th-clearest and 10th-windiest month. For the whole year in context, see Gualeguaychú's year-round climate.

Daytime high: 20°; 9th warmest
Overnight low: 11°; 5th coldest
Rainfall: 80 mm; 6.1 wet days
Daylight: 10 h 18 min; 7:41 AM – 5:59 PM
Cloud cover: 57%; 12th clearest
Wind: 12 km/h; 10th windiest
Solar energy: 2.72 kWh/m²
Travel score: 6.8; out of 10

Gualeguaychú is city in Gualeguaychú Department, Entre Ríos Province, Argentina.

Founded: 1783

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

← April Gualeguaychú year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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 Gualeguaychú reaches about 20°C in the afternoon and slips back to 11°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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	21	21	21	21	21	21	21	21	21	20	20	20	20	20	20	20	20	19	19	19	19	19	19	19	18	18	18	18	18	18	18
Avg low (°C)	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	9	9	9	9

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	12
5	21	12
6	21	12
7	21	12
8	21	11
9	21	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	11
19	19	11
20	19	10
21	19	10
22	19	10
23	19	10
24	19	10
25	18	10
26	18	10
27	18	10
28	18	9
29	18	9
30	18	9
31	18	9

Gualeguaychú weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 19°	110	7.7	13.9	5.3
Feb	29° / 19°	115	8	13.2	5.8
Mar	27° / 17°	121	8	12.3	7.0
Apr	23° / 14°	130	7.9	11.2	7.3
May	20° / 11°	80	6.1	10.3	6.8
Jun	17° / 8°	69	6.5	9.9	5.8
Jul	16° / 7°	64	6	10	5.6
Aug	18° / 8°	87	6.5	10.8	6.6
Sep	20° / 10°	87	7	11.8	6.9
Oct	23° / 13°	124	9.8	12.8	7.0
Nov	26° / 15°	104	6.9	13.7	7.2
Dec	29° / 18°	128	8.6	14.1	5.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 52%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	53	53	53	52	52	52	51	51	50	50	49	48	47	46	46	47	46	46	46	45	45	45	45	45	45	46	47	47	47	47	49
Cloudier (%)	47	47	47	48	48	48	49	49	50	50	51	52	53	54	54	53	54	54	54	55	55	55	55	55	55	54	53	53	53	53	51

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	53	47
4	52	48
5	52	48
6	52	48
7	51	49
8	51	49
9	50	50
10	50	50
11	49	51
12	48	52
13	47	53
14	46	54
15	46	54
16	47	53
17	46	54
18	46	54
19	46	54
20	45	55
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	46	54
27	47	53
28	47	53
29	47	53
30	47	53
31	49	51

Chance of precipitation in May

Any precipitation

Gualeguaychú gets around 80 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 23% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	23	22	22	21	21	21	20	20	20	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	19	19	19	19	19	19

	Rain chance (%)
1	23
2	22
3	22
4	21
5	21
6	21
7	20
8	20
9	20
10	19
11	19
12	19
13	19
14	19
15	19
16	20
17	20
18	20
19	20
20	20
21	20
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

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 65% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	56	56	57	57	58	58	59	60	61	61	61	62	62	63	63	63	63	65	65	66	67	68	70	71	72	73	74	75	76	77	77
Comfortable (%)	22	22	22	22	22	22	22	22	22	22	22	22	22	21	21	20	20	19	18	17	16	16	15	14	14	13	13	13	13	13	13
Humid (%)	16	16	15	15	14	14	13	13	12	12	12	12	12	12	12	13	13	13	14	14	14	13	13	13	12	12	11	10	9	8	8
Muggy (%)	6	6	6	6	6	6	6	5	5	5	5	4	4	4	4	4	4	3	3	3	3	3	2	2	2	2	2	2	2	2	2

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	16	6
2	56	22	16	6
3	57	22	15	6
4	57	22	15	6
5	58	22	14	6
6	58	22	14	6
7	59	22	13	6
8	60	22	13	5
9	61	22	12	5
10	61	22	12	5
11	61	22	12	5
12	62	22	12	4
13	62	22	12	4
14	63	21	12	4
15	63	21	12	4
16	63	20	13	4
17	63	20	13	4
18	65	19	13	3
19	65	18	14	3
20	66	17	14	3
21	67	16	14	3
22	68	16	13	3
23	70	15	13	2
24	71	14	13	2
25	72	14	12	2
26	73	13	12	2
27	74	13	11	2
28	75	13	10	2
29	76	13	9	2
30	77	13	8	2
31	77	13	8	2

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	12	12	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	11	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	12	calm
10	12	calm
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	light breeze
30	12	light breeze
31	12	light breeze

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 7:30 AM to 7:51 AM, and sunset from 6:13 PM to 5:52 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	10.7	10.7	10.7	10.6	10.6	10.6	10.5	10.5	10.5	10.5	10.4	10.4	10.4	10.4	10.3	10.3	10.3	10.3	10.2	10.2	10.2	10.2	10.1	10.1	10.1	10.1	10.1	10.1	10.0	10.0	10.0
Sunrise (AM)	7:30	7:31	7:31	7:32	7:33	7:34	7:34	7:35	7:36	7:37	7:37	7:38	7:39	7:40	7:40	7:41	7:42	7:43	7:43	7:44	7:45	7:45	7:46	7:47	7:48	7:48	7:49	7:50	7:50	7:51	7:51
Sunset (PM)	6:13	6:12	6:11	6:10	6:09	6:08	6:07	6:06	6:05	6:04	6:03	6:02	6:02	6:01	6:00	5:59	5:59	5:58	5:57	5:57	5:56	5:56	5:55	5:55	5:54	5:54	5:53	5:53	5:52	5:52	5:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	7:30	6:13
2	10.7	7:31	6:12
3	10.7	7:31	6:11
4	10.6	7:32	6:10
5	10.6	7:33	6:09
6	10.6	7:34	6:08
7	10.5	7:34	6:07
8	10.5	7:35	6:06
9	10.5	7:36	6:05
10	10.5	7:37	6:04
11	10.4	7:37	6:03
12	10.4	7:38	6:02
13	10.4	7:39	6:02
14	10.4	7:40	6:01
15	10.3	7:40	6:00
16	10.3	7:41	5:59
17	10.3	7:42	5:59
18	10.3	7:43	5:58
19	10.2	7:43	5:57
20	10.2	7:44	5:57
21	10.2	7:45	5:56
22	10.2	7:45	5:56
23	10.1	7:46	5:55
24	10.1	7:47	5:55
25	10.1	7:48	5:54
26	10.1	7:48	5:54
27	10.1	7:49	5:53
28	10.1	7:50	5:53
29	10.0	7:50	5:52
30	10.0	7:51	5:52
31	10.0	7:51	5:52

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 2.33 kWh/m² to a high of 7.34 kWh/m² in December across the year — May's 2.72 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.2	3.1	3.1	3.1	3.1	3.0	3.0	3.0	2.9	2.9	2.9	2.8	2.8	2.8	2.7	2.7	2.7	2.6	2.6	2.6	2.6	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.4	2.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.2	Moderate
2	3.1	Moderate
3	3.1	Moderate
4	3.1	Moderate
5	3.1	Moderate
6	3.0	Moderate
7	3.0	Moderate
8	3.0	Moderate
9	2.9	Moderate
10	2.9	Moderate
11	2.9	Moderate
12	2.8	Moderate
13	2.8	Moderate
14	2.8	Moderate
15	2.7	Moderate
16	2.7	Moderate
17	2.7	Moderate
18	2.6	Moderate
19	2.6	Moderate
20	2.6	Moderate
21	2.6	Moderate
22	2.5	Moderate
23	2.5	Moderate
24	2.5	Moderate
25	2.5	Moderate
26	2.5	Moderate
27	2.5	Moderate
28	2.5	Moderate
29	2.5	Moderate
30	2.4	Moderate
31	2.4	Moderate

Planning a trip in May

Is May a good time to visit Gualeguaychú?

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 Gualeguaychú for sightseeing.

What to pack for Gualeguaychú in May

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

In May, Gualeguaychú sees daytime highs around 20°C and nights near 11°C. Little to plan around — just the basics. About 6 days see rain.

UV index in Gualeguaychú 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 Gualeguaychú peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	11	10	6	4	3	3	4	6	8	11	12
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	11	Extreme
Mar	10	Very high
Apr	6	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	8	Very high
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Gualeguaychú?

Gualeguaychú sits at 33.0°S, 58.5°W, 19 m above sea level, in Argentina. The nearest listed city is Fray Bentos, 23 km away.

Topography around Gualeguaychú

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

Within 3 km, the terrain around Gualeguaychú has only modest variations in elevation — a maximum elevation change of 33 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, only modest variations in elevation — a maximum elevation change of 101 m.

The land around Gualeguaychú is covered by artificial surfaces (40%) and grassland (31%) within 3 km, grassland (40%) and cropland (31%) within 16 km, and cropland (43%) and grassland (30%) within 80 km.

3 km

33 m

artificial surfaces 40%

16 km

52 m

grassland 40%

80 km

101 m

cropland 43%

treesgrasslandcroplandartificial surfaceswaterwetland

← April Gualeguaychú year-round climate June →Best places to visit in May

May weather nearby: Fray Bentos 23 km · Mercedes 53 km · Concepción del Uruguay 64 km · Dolores 64 km · Gualeguay 75 km · Paysandú 87 km · Young 90 km · Colón 94 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

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 Gualeguaychú (-33.0078°, -58.5184°, elevation 19 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	12
5	21	12
6	21	12
7	21	12
8	21	11
9	21	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	11
19	19	11
20	19	10
21	19	10
22	19	10
23	19	10
24	19	10
25	18	10
26	18	10
27	18	10
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	53	47
4	52	48
5	52	48
6	52	48
7	51	49
8	51	49
9	50	50
10	50	50
11	49	51
12	48	52
13	47	53
14	46	54
15	46	54
16	47	53
17	46	54
18	46	54
19	46	54
20	45	55
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	46	54
27	47	53
28	47	53
29	47	53
30	47	53
31	49	51

	Rain chance (%)
1	23
2	22
3	22
4	21
5	21
6	21
7	20
8	20
9	20
10	19
11	19
12	19
13	19
14	19
15	19
16	20
17	20
18	20
19	20
20	20
21	20
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	16	6
2	56	22	16	6
3	57	22	15	6
4	57	22	15	6
5	58	22	14	6
6	58	22	14	6
7	59	22	13	6
8	60	22	13	5
9	61	22	12	5
10	61	22	12	5
11	61	22	12	5
12	62	22	12	4
13	62	22	12	4
14	63	21	12	4
15	63	21	12	4
16	63	20	13	4
17	63	20	13	4
18	65	19	13	3
19	65	18	14	3
20	66	17	14	3
21	67	16	14	3
22	68	16	13	3
23	70	15	13	2
24	71	14	13	2
25	72	14	12	2
26	73	13	12	2
27	74	13	11	2
28	75	13	10	2
29	76	13	9	2
30	77	13	8	2
31	77	13	8	2

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	12
5	21	12
6	21	12
7	21	12
8	21	11
9	21	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	11
19	19	11
20	19	10
21	19	10
22	19	10
23	19	10
24	19	10
25	18	10
26	18	10
27	18	10
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	53	47
4	52	48
5	52	48
6	52	48
7	51	49
8	51	49
9	50	50
10	50	50
11	49	51
12	48	52
13	47	53
14	46	54
15	46	54
16	47	53
17	46	54
18	46	54
19	46	54
20	45	55
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	46	54
27	47	53
28	47	53
29	47	53
30	47	53
31	49	51

	Rain chance (%)
1	23
2	22
3	22
4	21
5	21
6	21
7	20
8	20
9	20
10	19
11	19
12	19
13	19
14	19
15	19
16	20
17	20
18	20
19	20
20	20
21	20
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	16	6
2	56	22	16	6
3	57	22	15	6
4	57	22	15	6
5	58	22	14	6
6	58	22	14	6
7	59	22	13	6
8	60	22	13	5
9	61	22	12	5
10	61	22	12	5
11	61	22	12	5
12	62	22	12	4
13	62	22	12	4
14	63	21	12	4
15	63	21	12	4
16	63	20	13	4
17	63	20	13	4
18	65	19	13	3
19	65	18	14	3
20	66	17	14	3
21	67	16	14	3
22	68	16	13	3
23	70	15	13	2
24	71	14	13	2
25	72	14	12	2
26	73	13	12	2
27	74	13	11	2
28	75	13	10	2
29	76	13	9	2
30	77	13	8	2
31	77	13	8	2

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	12
5	21	12
6	21	12
7	21	12
8	21	11
9	21	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	11
19	19	11
20	19	10
21	19	10
22	19	10
23	19	10
24	19	10
25	18	10
26	18	10
27	18	10
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	53	47
4	52	48
5	52	48
6	52	48
7	51	49
8	51	49
9	50	50
10	50	50
11	49	51
12	48	52
13	47	53
14	46	54
15	46	54
16	47	53
17	46	54
18	46	54
19	46	54
20	45	55
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	46	54
27	47	53
28	47	53
29	47	53
30	47	53
31	49	51

	Rain chance (%)
1	23
2	22
3	22
4	21
5	21
6	21
7	20
8	20
9	20
10	19
11	19
12	19
13	19
14	19
15	19
16	20
17	20
18	20
19	20
20	20
21	20
22	20
23	20
24	20
25	20
26	19
27	19
28	19
29	19
30	19
31	19

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	16	6
2	56	22	16	6
3	57	22	15	6
4	57	22	15	6
5	58	22	14	6
6	58	22	14	6
7	59	22	13	6
8	60	22	13	5
9	61	22	12	5
10	61	22	12	5
11	61	22	12	5
12	62	22	12	4
13	62	22	12	4
14	63	21	12	4
15	63	21	12	4
16	63	20	13	4
17	63	20	13	4
18	65	19	13	3
19	65	18	14	3
20	66	17	14	3
21	67	16	14	3
22	68	16	13	3
23	70	15	13	2
24	71	14	13	2
25	72	14	12	2
26	73	13	12	2
27	74	13	11	2
28	75	13	10	2
29	76	13	9	2
30	77	13	8	2
31	77	13	8	2