Piracicaba weather in May

In May, Piracicaba sees average daytime highs of 26°C and overnight lows near 15°C, with 52 mm of rain across 6 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 25°C by the end. The sky is clear or mostly clear about 44% of the time in May, and the air most often feels comfortable.

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 Piracicaba's 6th-clearest and 7th-windiest month. For the whole year in context, see Piracicaba's year-round climate.

Daytime high
26°
10th warmest
Overnight low
15°
4th coldest
Rainfall
52 mm
6 wet days
Daylight
10 h 54 min
7:39 AM – 6:34 PM
Cloud cover
50%
6th clearest
Wind
8 km/h
7th windiest
Solar energy
3.89 kWh/m²
Travel score
7.5
out of 10
Air quality
Moderate
PM2.5 13 µg/m³ · 2019

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 27°C in the first days to 25°C by the end.

A typical May day in Piracicaba reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, May runs about 3°C cooler than April and on par with June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12716
22716
32716
42716
52716
62716
72716
82716
92616
102616
112615
122615
132615
142615
152615
162615
172515
182515
192515
202515
212515
222515
232515
242515
252514
262514
272514
282514
292514
302514
312514

How May really feels in Piracicaba

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.

Piracicaba 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
Jan30° / 21°25522.313.23.6
Feb30° / 21°1861912.83.7
Mar30° / 20°14417.112.24.4
Apr29° / 18°537.311.56.2
May26° / 15°52610.97.5
Jun25° / 14°384.510.68.0
Jul25° / 13°313.810.78.1
Aug27° / 14°303.911.27.6
Sep29° / 16°618.111.96.0
Oct30° / 18°10412.112.54.9
Nov30° / 19°1481513.14.5
Dec30° / 20°19019.913.43.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% 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 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36535
46436
56337
66238
76238
86040
96040
105941
115842
125842
135842
145743
155743
165743
175743
185644
195644
205743
215644
225644
235743
245743
255743
265644
275644
285644
295644
305644
315743

Chance of precipitation in May

Any precipitation

Piracicaba gets around 52 mm of rain over 6 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 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
216
316
416
516
616
717
817
917
1018
1118
1219
1319
1420
1520
1621
1721
1822
1922
2022
2122
2222
2322
2422
2522
2622
2722
2822
2922
3022
3122

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
114353813
215353812
316363710
41837369
51838358
61938358
72039347
82040337
92140336
102141326
112141326
122241325
132242325
142242315
152242314
162342314
172342304
182342304
192342304
202442304
212442304
222541304
232641304
242640304
252739304
262839304
272838304
282938304
292937303
303037303
313037303

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 7:33 AM to 7:46 AM, and sunset from 6:43 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.27:336:43
211.27:336:42
311.17:346:42
411.17:346:41
511.17:346:40
611.17:356:40
711.17:356:39
811.07:366:38
911.07:366:38
1011.07:376:37
1111.07:376:37
1211.07:386:36
1311.07:386:36
1410.97:396:35
1510.97:396:35
1610.97:396:34
1710.97:406:34
1810.97:406:33
1910.97:416:33
2010.97:416:33
2110.87:426:32
2210.87:426:32
2310.87:436:32
2410.87:436:31
2510.87:446:31
2610.87:446:31
2710.87:456:30
2810.87:456:30
2910.77:456:30
3010.77:466:30
3110.77:466:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.89 kWh/m².

For context, solar energy here swings from a low near 3.59 kWh/m² to a high of 6.02 kWh/m² in November across the year — May's 3.89 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.2Bright
94.1Bright
104.1Bright
114.0Bright
124.0Moderate
134.0Moderate
143.9Moderate
153.9Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.6Moderate
313.6Moderate
Planning a trip in May

Hazard calendar for Piracicaba

In seasonPeak

None of Piracicaba's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Piracicaba's monsoon runs November–March, when most of the year's rain falls.

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

Is May a good time to visit Piracicaba?

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

7.5
Sightseeing
4th-best month of the year
7.1
Beach & pool
6th-best month of the year

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

What to pack for Piracicaba in May

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

In May, Piracicaba sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes. About 6 days see rain.

light clothes

UV index in Piracicaba 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 Piracicaba peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Piracicaba 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 Piracicaba is worst in September — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Piracicaba's WHO annual average of 13 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1121 µg/m³Dec 129 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug20Moderate
Sep21Moderate
Oct15Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Piracicaba?

Piracicaba sits at 22.7°S, 47.6°W, 530 m above sea level, in Brazil. The nearest listed city is Rio das Pedras, 14 km away.

Topography around Piracicaba

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

Within 3 km, the terrain around Piracicaba has only modest variations in elevation — a maximum elevation change of 129 m around an average of 525 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 296 m; within 80 km, large variations in elevation — a maximum elevation change of 634 m.

The land around Piracicaba is covered by artificial surfaces (73%) and trees (20%) within 3 km, cropland (45%) and trees (24%) within 16 km, and cropland (39%), trees (31%) and grassland (23%) within 80 km.

3 km
129 m
16 km
296 m
80 km
634 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Rio das Pedras 14 km · Iracemápolis 21 km · Santa Bárbara d'Oeste 24 km · Charqueada 27 km · Limeira 31 km · Santa Gertrudes 32 km · Americana 33 km · Capivari 33 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 Piracicaba (-22.7253°, -47.6492°, elevation 530 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).