Piraí do Sul weather in May

In May, Piraí do Sul sees average daytime highs of 20°C and overnight lows near 12°C, with 94 mm of rain across 9.2 wet days and about 10.8 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°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 11 h 06 min at the start of May to 10 h 36 min by month's end. Set against the rest of the year, May is Piraí do Sul's 5th-clearest and 10th-windiest month. For the whole year in context, see Piraí do Sul's year-round climate.

Daytime high
20°
10th warmest
Overnight low
12°
4th coldest
Rainfall
94 mm
9.2 wet days
Daylight
10 h 48 min
7:52 AM – 6:40 PM
Cloud cover
57%
5th clearest
Wind
10 km/h
10th windiest
Solar energy
3.47 kWh/m²
Travel score
6.6
out of 10

Piraí do Sul is settlement in Brazil.

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 22°C in the first days to 19°C by the end.

A typical May day in Piraí do Sul reaches about 20°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, May runs about 3°C cooler than April and about 1°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52213
62113
72112
82112
92112
102112
112112
122112
132112
142012
152012
162012
172012
182012
192012
202012
212011
222011
232011
242011
252011
261911
271911
281911
291911
301911
311911

Piraí do Sul weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°24224.113.34.5
Feb26° / 17°18020.812.94.6
Mar25° / 17°13518.212.25.5
Apr24° / 15°719.611.46.9
May20° / 12°949.210.86.6
Jun19° / 11°96810.56.6
Jul20° / 10°796.810.66.9
Aug21° / 11°717.111.17.3
Sep23° / 12°13010.311.86.7
Oct24° / 14°14515.512.65.9
Nov25° / 15°13916.313.25.8
Dec26° / 17°18019.913.55.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25545
35545
45446
55446
65248
75149
85050
94852
104852
114753
124654
134654
144654
154555
164555
174555
184555
194555
204654
214654
224753
234654
244753
254852
264852
274951
284852
294951
305050
315050

Chance of precipitation in May

Any precipitation

Piraí do Sul gets around 94 mm of rain over 9.2 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 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
125
225
325
424
524
625
725
825
925
1026
1126
1226
1327
1427
1528
1629
1729
1830
1931
2031
2132
2233
2333
2434
2534
2634
2735
2835
2935
3035
3134

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13844181
23944161
34044151
44244141
54343131
64443121
74543120
84642110
94742100
104842100
11494190
12504190
13524080
14524080
15533980
16533980
17543880
18553780
19573580
20583480
21593380
22603280
23613180
24623080
25623080
26632980
27632980
28642880
29642880
30642880
31642880

Wind in May

Winds average 10 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
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 h 06 min at the start of May to 10 h 36 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 7:44 AM to 7:59 AM, and sunset from 6:50 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:446:50
211.17:456:49
311.17:456:48
411.07:466:48
511.07:466:47
611.07:476:46
711.07:476:46
811.07:486:45
910.97:486:44
1010.97:496:44
1110.97:496:43
1210.97:506:43
1310.97:506:42
1410.87:516:41
1510.87:516:41
1610.87:526:40
1710.87:526:40
1810.87:536:40
1910.87:536:39
2010.77:546:39
2110.77:546:38
2210.77:556:38
2310.77:556:38
2410.77:566:37
2510.77:566:37
2610.77:576:37
2710.77:576:36
2810.67:586:36
2910.67:586:36
3010.67:596:36
3110.67:596:35

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.47 kWh/m².

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 5.88 kWh/m² in December across the year — May's 3.47 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.7Moderate
93.7Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.2Moderate
293.2Moderate
303.2Moderate
313.1Moderate
Planning a trip in May

Is May a good time to visit Piraí do Sul?

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

6.6
Sightseeing
5th-best month of the year
3.7
Beach & pool
10th-best month of the year

May is a reasonable time to visit Piraí do Sul for sightseeing.

What to pack for Piraí do Sul in May

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

In May, Piraí do Sul sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Piraí do Sul 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 Piraí do Sul peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep5High
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Piraí do Sul 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 Piraí do Sul is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1316 µg/m³Mar 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul10Good
Aug14Moderate
Sep17Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Piraí do Sul?

Piraí do Sul sits at 24.5°S, 49.9°W, 1,000 m above sea level, in Brazil. The nearest listed city is Castro, 30 km away.

Topography around Piraí do Sul

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

Within 3 km, the terrain around Piraí do Sul has only modest variations in elevation — a maximum elevation change of 207 m around an average of 1,038 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 414 m; within 80 km, large variations in elevation — a maximum elevation change of 1,159 m.

The land around Piraí do Sul is covered by trees (47%) and grassland (24%) within 3 km, trees (49%), cropland (29%) and grassland (22%) within 16 km, and trees (59%) and cropland (26%) within 80 km.

3 km
207 m
16 km
414 m
80 km
1,159 m
treesgrasslandcroplandartificial surfaces
May weather nearby: Castro 30 km · Jaguariaíva 40 km · Arapoti 43 km · Tibagi 47 km · Ponta Grossa 67 km · Sengés 67 km · Telêmaco Borba 71 km · Wenceslau Braz 74 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Piraí do Sul (-24.5261°, -49.9486°, elevation 1,000 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).