Juan José Castelli weather in May

In May, Juan José Castelli sees average daytime highs of 24°C and overnight lows near 14°C, with 62 mm of rain across 7.8 wet days and about 10.7 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of May to 10 h 30 min by month's end. Set against the rest of the year, May is Juan José Castelli's 11th-clearest and 8th-windiest month. For the whole year in context, see Juan José Castelli's year-round climate.

Daytime high
24°
10th warmest
Overnight low
14°
4th coldest
Rainfall
62 mm
7.8 wet days
Daylight
10 h 42 min
7:37 AM – 6:21 PM
Cloud cover
55%
11th clearest
Wind
10 km/h
8th windiest
Solar energy
3.1 kWh/m²
Travel score
7.2
out of 10

Juan José Castelli is human settlement.

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 25°C in the first days to 22°C by the end.

A typical May day in Juan José Castelli reaches about 24°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 30°C. Set against its neighbours, May runs about 4°C cooler than April and about 2°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12616
22516
32516
42516
52516
62516
72515
82515
92515
102415
112415
122415
132415
142415
152415
162414
172314
182314
192314
202314
212314
222314
232314
242213
252213
262213
272213
282213
292213
302213
312213

How May really feels in Juan José Castelli

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Juan José Castelli weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°12411.213.43.3
Feb32° / 22°13711.112.93.8
Mar30° / 21°13711.112.24.8
Apr27° / 18°1179.311.46.5
May24° / 14°627.810.77.2
Jun22° / 13°436.810.47.1
Jul22° / 11°315.810.57.6
Aug25° / 13°404.511.18.1
Sep28° / 15°586.711.87.0
Oct30° / 18°1201012.65.2
Nov31° / 20°14010.113.34.6
Dec33° / 22°13511.113.63.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25446
35446
45446
55446
65545
75545
85446
95347
105347
115248
125248
135248
145149
155149
165050
175050
184951
194951
204951
214852
224852
234852
244852
254852
264753
274852
284852
294753
304852
314852

Chance of precipitation in May

Any precipitation

Juan José Castelli gets around 62 mm of rain over 7.8 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 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
326
426
526
626
726
826
926
1027
1127
1227
1327
1427
1527
1627
1727
1826
1926
2026
2126
2225
2325
2424
2524
2623
2723
2823
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 39% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12716212313
22816212212
32916212212
43017212112
53117212011
63218201911
73218201910
83319201810
9331920189
10342020179
11342020178
12352020178
13362020177
14362019177
15372019176
16382018176
17392018175
18412018175
19422017175
20431917164
21441917164
22461816164
23471816154
24481816154
25491716144
26491716144
27501716134
28511716133
29501717133
30511717123
31511717123

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 hours at the start of May to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over May. Sunrise moves from 7:29 AM to 7:45 AM, and sunset from 6:31 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:296:31
211.07:296:30
311.07:306:29
411.07:306:28
510.97:316:28
610.97:316:27
710.97:326:26
810.97:326:26
910.97:336:25
1010.87:336:24
1110.87:346:24
1210.87:356:23
1310.87:356:22
1410.87:366:22
1510.87:366:21
1610.77:376:21
1710.77:376:20
1810.77:386:20
1910.77:386:19
2010.77:396:19
2110.67:396:18
2210.67:406:18
2310.67:406:18
2410.67:416:17
2510.67:426:17
2610.67:426:17
2710.67:436:16
2810.57:436:16
2910.57:446:16
3010.57:446:15
3110.57:456:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.1 kWh/m².

For context, solar energy here swings from a low near 2.67 kWh/m² to a high of 6.73 kWh/m² in December across the year — May's 3.1 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.4Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.1Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.8Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in May

Is May a good time to visit Juan José Castelli?

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

7.2
Sightseeing
3rd-best month of the year
5.9
Beach & pool
10th-best month of the year

May is one of the better times to visit Juan José Castelli for general sightseeing.

What to pack for Juan José Castelli in May

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

In May, Juan José Castelli sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes. About 8 days see rain.

light clothes

UV index in Juan José Castelli in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Juan José Castelli peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 14Jul 11UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct7High
Nov12Extreme
Dec14Extreme

Air quality in Juan José Castelli 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 Juan José Castelli is worst in August — around 31 µg/m³ PM2.5 (moderate), about 5.1× the cleanest month (April, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 2330 µg/m³Apr 236 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar8Good
Apr6Good
May6Good
Jun7Good
Jul15Moderate
Aug31Moderate
Sep29Moderate
Oct18Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Juan José Castelli?

Juan José Castelli sits at 25.9°S, 60.6°W, 113 m above sea level, in Argentina. The nearest listed city is Tres Isletas, 48 km away.

Topography around Juan José Castelli

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

Within 3 km, the terrain around Juan José Castelli has only modest variations in elevation — a maximum elevation change of 9 m around an average of 110 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 20 m; within 80 km, only modest variations in elevation — a maximum elevation change of 64 m.

The land around Juan José Castelli is covered by cropland (30%), artificial surfaces (29%) and grassland (22%) within 3 km, trees (56%) and cropland (30%) within 16 km, and trees (75%) within 80 km.

3 km
9 m
16 km
20 m
80 km
64 m
treesshrubsgrasslandcroplandartificial surfaces
May weather nearby: Tres Isletas 48 km · Presidencia Roque Sáenz Peña 96 km · Quitilipi 110 km · Machagai 123 km · Las Breñas 135 km · General José de San Martín 143 km · Charata 152 km · Pirané 153 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 Juan José Castelli (-25.9466°, -60.6201°, elevation 113 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).