San José de Mayo weather in May

In May, San José de Mayo sees average daytime highs of 19°C and overnight lows near 10°C, with 83 mm of rain across 6.7 wet days and about 10.2 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 36 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 José de Mayo's 12th-clearest and 11th-windiest month. For the whole year in context, see San José de Mayo's year-round climate.

Daytime high
19°
8th warmest
Overnight low
10°
5th coldest
Rainfall
83 mm
6.7 wet days
Daylight
10 h 12 min
8:37 AM – 6:50 PM
Cloud cover
60%
12th clearest
Wind
12 km/h
11th windiest
Solar energy
2.64 kWh/m²
Travel score
6.4
out of 10

San José de Mayo is city in Uruguay, departmental capital of San José.

Density
2,117/km²
people per km²
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 20°C in the first days to 17°C by the end.

A typical May day in San José de Mayo 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 14°C and 23°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
22011
32011
42011
52011
62011
72011
82011
92011
102010
111910
121910
131910
141910
151910
161910
171910
181910
191810
201810
211810
22189
23189
24189
25189
26179
27179
28179
29179
30178
31178

San José de Mayo weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°857.9145.9
Feb28° / 18°1028.213.36.4
Mar26° / 16°1038.112.37.1
Apr22° / 13°101811.27.1
May19° / 10°836.710.26.4
Jun16° / 797.59.85.2
Jul15° / 787.49.94.8
Aug17° / 917.710.75.8
Sep19° / 857.611.86.4
Oct22° / 11°1169.812.96.7
Nov25° / 14°1057.813.87.3
Dec28° / 16°888.314.36.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25050
35050
45050
55050
64852
74852
84753
94654
104555
114456
124456
134258
144258
154159
164159
174159
184060
194060
204060
213961
223961
233961
244060
254060
264159
274159
284159
294258
304258
314357

Chance of precipitation in May

Any precipitation

San José de Mayo gets around 83 mm of rain over 6.7 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 22% and peaks near 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
124
223
323
422
522
622
721
821
921
1021
1121
1221
1321
1422
1522
1622
1722
1822
1922
2023
2123
2223
2323
2423
2522
2622
2722
2822
2922
3022
3122

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 70% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16024133
26323122
36323122
46522112
56522112
66622102
76721102
8682192
9682192
10682192
11692182
12692182
13692182
14692182
15692182
16692182
17692182
18692092
19692092
20692092
21701992
22721891
23731881
24741781
25751681
26761581
27771571
28781471
29801361
30811351
31821251

Wind in May

Winds average 12 km/h in May.

Across May, 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.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 36 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 42 minutes over May. Sunrise moves from 8:25 AM to 8:47 AM, and sunset from 7:03 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.68:257:03
210.68:267:02
310.68:267:01
410.68:277:00
510.58:286:59
610.58:296:58
710.58:306:57
810.48:306:56
910.48:316:55
1010.48:326:54
1110.38:336:54
1210.38:346:53
1310.38:346:52
1410.38:356:51
1510.28:366:50
1610.28:376:50
1710.28:376:49
1810.28:386:48
1910.18:396:47
2010.18:406:47
2110.18:406:46
2210.18:416:45
2310.18:426:45
2410.08:436:44
2510.08:436:44
2610.08:446:43
2710.08:456:43
289.98:456:42
299.98:466:42
309.98:476:42
319.98:476:41

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.64 kWh/m².

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 7.42 kWh/m² in December across the year — May's 2.64 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.1Moderate
43.0Moderate
53.0Moderate
63.0Moderate
72.9Moderate
82.9Moderate
92.9Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.7Moderate
142.7Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.4Moderate
282.4Moderate
292.4Moderate
302.3Moderate
312.3Moderate
Planning a trip in May

Is May a good time to visit San José de Mayo?

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

6.4
Sightseeing
6th-best month of the year
2.6
Beach & pool
8th-best month of the year

May is a reasonable time to visit San José de Mayo for sightseeing.

What to pack for San José de Mayo in May

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

In May, San José de Mayo sees daytime highs around 19°C and nights near 10°C. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near San José de Mayo in May

The nearest coast averages about 16°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in January at about 24°C and coldest in July near 11°C.

It's comfortable for a long swim from Nov 17 to Apr 9 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb24Warm
Mar23Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug12Bracing
Sep14Bracing
Oct17Cool
Nov20Refreshing
Dec23Refreshing

UV index in San José de Mayo 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 José de Mayo peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 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 16UV 13Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec11Extreme
Location & terrain

Where is San José de Mayo?

San José de Mayo sits at 34.3°S, 56.7°W, 53 m above sea level, in Uruguay. The nearest listed city is Santa Lucía, 32 km away.

Santa LucíaCanelonesFloridaDelta del TigreProgresoLas PiedrasLa PazMontevideo

Topography around San José de Mayo

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

Within 3 km, the terrain around San José de Mayo has only modest variations in elevation — a maximum elevation change of 50 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 85 m; within 80 km, only modest variations in elevation — a maximum elevation change of 202 m.

The land around San José de Mayo is covered by grassland (40%), artificial surfaces (23%) and trees (21%) within 3 km, cropland (51%) and grassland (37%) within 16 km, and grassland (39%), cropland (33%) and water (21%) within 80 km.

3 km
50 m
16 km
85 m
80 km
202 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Santa Lucía 32 km · Canelones 45 km · Florida 53 km · Delta del Tigre 57 km · Progreso 58 km · Las Piedras 63 km · La Paz 65 km · Montevideo 79 km

Uruguay travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / I / L
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$25,216
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
11.2
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 542
Religion
none 47%Roman Catholic 37%Protestant 15%atheist 10%

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 José de Mayo (-34.339°, -56.7134°, elevation 53 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).