Yby Yaú weather in May

In May, Yby Yaú sees average daytime highs of 26°C and overnight lows near 17°C, with 136 mm of rain across 9.1 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 12 min at the start of May to 10 h 42 min by month's end. Set against the rest of the year, May is Yby Yaú's 6th-clearest and 6th-windiest month. For the whole year in context, see Yby Yaú's year-round climate.

Daytime high
26°
10th warmest
Overnight low
17°
4th coldest
Rainfall
136 mm
9.1 wet days
Daylight
10 h 54 min
7:15 AM – 6:09 PM
Cloud cover
52%
6th clearest
Wind
9 km/h
6th windiest
Solar energy
3.5 kWh/m²
Travel score
7.0
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical May day in Yby Yaú reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 31°C. Set against its neighbours, May runs about 4°C cooler than April and about 1°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12818
22818
32718
42718
52718
62717
72717
82717
92617
102617
112617
122617
132617
142617
152617
162617
172516
182516
192516
202516
212516
222516
232516
242516
252516
262516
272516
282516
292516
302416
312416

How May really feels in Yby Yaú

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.

Yby Yaú weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°16117.113.33.3
Feb32° / 22°14815.312.83.5
Mar31° / 22°11912.812.24.2
Apr29° / 20°105911.55.5
May26° / 17°1369.110.97.0
Jun25° / 16°1038.410.67.3
Jul25° / 15°796.810.77.6
Aug28° / 16°806.211.27.1
Sep29° / 18°1118.911.95.6
Oct31° / 20°17212.812.54.4
Nov31° / 21°1671313.14.1
Dec32° / 22°18016.413.43.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55644
65644
75545
85446
95446
105446
115347
125347
135347
145347
155446
165446
175347
185347
195347
205446
215446
225446
235347
245347
255347
265347
275347
285347
295248
305248
315347

Chance of precipitation in May

Any precipitation

Yby Yaú gets around 136 mm of rain over 9.1 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 29% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
325
425
525
625
726
826
927
1027
1128
1228
1328
1428
1529
1629
1730
1830
1931
2031
2131
2232
2332
2432
2532
2632
2732
2832
2931
3031
3131

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1131527377
2141628367
3151628356
4151628346
5161728335
6171729325
7171829315
8181929305
9181929294
10182029284
11192029284
12192129274
13202129264
14202129264
15212229254
16212229254
17212229244
18222329234
19222329224
20232428214
21232428214
22242428204
23242528204
24252528194
25252528194
26262527193
27262527183
28262527183
29272527183
30272528183
31272528183

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 12 min at the start of May to 10 h 42 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 7:09 AM to 7:22 AM, and sunset from 6:18 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:096:18
211.17:096:17
311.17:096:17
411.17:106:16
511.17:106:15
611.17:116:15
711.07:116:14
811.07:126:14
911.07:126:13
1011.07:136:12
1111.07:136:12
1211.07:146:11
1310.97:146:11
1410.97:146:10
1510.97:156:10
1610.97:156:09
1710.97:166:09
1810.97:166:09
1910.97:176:08
2010.87:176:08
2110.87:186:07
2210.87:186:07
2310.87:196:07
2410.87:196:06
2510.87:206:06
2610.87:206:06
2710.77:216:06
2810.77:216:05
2910.77:226:05
3010.77:226:05
3110.77:226:05

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.5 kWh/m².

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 6.41 kWh/m² in December across the year — May's 3.5 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in May

Is May a good time to visit Yby Yaú?

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

7.0
Sightseeing
4th-best month of the year
6.6
Beach & pool
5th-best month of the year

May is one of the better times to visit Yby Yaú for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Yby Yaú in May

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

In May, Yby Yaú sees daytime highs around 26°C and nights near 17°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Yby Yaú in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yby Yaú peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 19UV 15Jul 10UV 6
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug7Very high
Sep6High
Oct10Very high
Nov13Extreme
Dec13Extreme

Air quality in Yby Yaú 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 Yby Yaú is worst in September — around 39 µg/m³ PM2.5 (poor), about 6.3× the cleanest month (April, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 939 µg/m³Apr 126 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar7Good
Apr6Good
May7Good
Jun9Good
Jul10Good
Aug39Poor
Sep39Poor
Oct21Moderate
Nov13Moderate
Dec9Good
Location & terrain

Where is Yby Yaú?

Yby Yaú sits at 23.0°S, 56.5°W, 184 m above sea level, in Paraguay. The nearest listed city is Pedro Juan Caballero, 94 km away.

Pedro Juan CaballeroBela VistaPonta PorãConcepciónAmambaiJardimCaarapóDourados

Topography around Yby Yaú

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

Within 3 km, the terrain around Yby Yaú has only modest variations in elevation — a maximum elevation change of 101 m around an average of 197 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 264 m; within 80 km, large variations in elevation — a maximum elevation change of 667 m.

The land around Yby Yaú is covered by grassland (53%) and trees (41%) within 3 km, grassland (67%) and trees (30%) within 16 km, and grassland (56%) and trees (36%) within 80 km.

3 km
101 m
16 km
264 m
80 km
667 m
treesgrasslandcroplandartificial surfaces
May weather nearby: Pedro Juan Caballero 94 km · Bela Vista 95 km · Ponta Porã 96 km · Concepción 103 km · Amambai 135 km · Jardim 170 km · Caarapó 180 km · Dourados 196 km

Paraguay travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / N
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$7,027
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
64%
of population, 2024
Homicide rate
6.8
per 100k, 2023
Road deaths
22
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 531
Religion
Roman Catholic 80%Protestant 7%Believer 6%other 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 Yby Yaú (-22.9661°, -56.5407°, elevation 184 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).