São Lourenço da Serra weather in May

In May, São Lourenço da Serra sees average daytime highs of 22°C and overnight lows near 14°C, with 73 mm of rain across 9.5 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 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels comfortable.

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 São Lourenço da Serra's 4th-clearest and 8th-windiest month. For the whole year in context, see São Lourenço da Serra's year-round climate.

Daytime high
22°
10th warmest
Overnight low
14°
4th coldest
Rainfall
73 mm
9.5 wet days
Daylight
10 h 54 min
7:38 AM – 6:30 PM
Cloud cover
61%
4th clearest
Wind
10 km/h
8th windiest
Solar energy
3.52 kWh/m²
Travel score
6.7
out of 10

São Lourenço da Serra is human 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 23°C in the first days to 21°C by the end.

A typical May day in São Lourenço da Serra reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, May runs about 3°C cooler than April and on par with June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62314
72314
82214
92214
102214
112214
122214
132214
142214
152214
162214
172214
182214
192114
202114
212113
222113
232113
242113
252113
262113
272113
282113
292113
302113
312113

São Lourenço da Serra 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° / 19°29225.913.34.1
Feb27° / 19°23822.212.84.3
Mar26° / 18°20922.812.24.7
Apr24° / 16°9113.411.56.2
May22° / 14°739.510.96.7
Jun21° / 13°616.810.67.1
Jul21° / 12°646.610.77.1
Aug22° / 12°506.411.27.4
Sep23° / 14°10711.111.96.6
Oct24° / 15°1441712.65.6
Nov24° / 16°18819.213.25.2
Dec26° / 18°22923.113.44.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44753
54654
64654
74456
84456
94357
104258
114258
124159
134159
144159
154159
164159
174159
184258
194258
204258
214258
224357
234357
244456
254555
264357
274456
284555
294555
304654
314753

Chance of precipitation in May

Any precipitation

São Lourenço da Serra gets around 73 mm of rain over 9.5 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 31% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
231
331
430
530
629
729
829
929
1030
1130
1230
1330
1430
1531
1631
1731
1831
1932
2032
2132
2232
2332
2432
2532
2632
2731
2831
2931
3031
3131

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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11241407
21342396
31543385
41643374
51744363
61845353
71945333
82046322
92046312
102147302
112248292
122249272
132350262
142351251
152451241
162452231
172551231
182552221
192652211
202751211
212851201
222950201
233149191
243249191
253348190
263447180
273646180
283745180
293844180
303944170
313943170

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 7:31 AM to 7:46 AM, and sunset from 6:39 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:316:39
211.17:326:38
311.17:326:37
411.17:336:37
511.07:336:36
611.07:346:35
711.07:346:35
811.07:356:34
911.07:356:33
1011.07:366:33
1110.97:366:32
1210.97:376:32
1310.97:376:31
1410.97:386:31
1510.97:386:30
1610.97:386:30
1710.87:396:29
1810.87:396:29
1910.87:406:28
2010.87:406:28
2110.87:416:27
2210.87:416:27
2310.77:426:27
2410.77:426:26
2510.77:436:26
2610.77:436:26
2710.77:446:25
2810.77:446:25
2910.77:456:25
3010.77:456:25
3110.67:466:25

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.52 kWh/m².

For context, solar energy here swings from a low near 3.23 kWh/m² to a high of 5.67 kWh/m² in December across the year — May's 3.52 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
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.2Moderate
Planning a trip in May

Hazard calendar for São Lourenço da Serra

In seasonPeak

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

São Lourenço da Serra's rainy season runs October–March, when most of the year's rain falls.

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

Is May a good time to visit São Lourenço da Serra?

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

6.7
Sightseeing
4th-best month of the year
4.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit São Lourenço da Serra for sightseeing.

What to pack for São Lourenço da Serra in May

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

In May, São Lourenço da Serra sees daytime highs around 22°C and nights near 14°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near São Lourenço da Serra in May

The nearest coast averages about 24°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 44 km away) is warmest in February at about 27°C and coldest in August near 20°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug20Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in São Lourenço da Serra 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 São Lourenço da Serra peaks around January 23 at about 14 (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 23UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar9Very high
Apr8Very high
May7High
Jun6High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in São Lourenço da Serra 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 São Lourenço da Serra is worst in July — around 33 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 2033 µg/m³Jan 1817 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb17Moderate
Mar18Moderate
Apr20Moderate
May24Moderate
Jun30Moderate
Jul33Moderate
Aug32Moderate
Sep29Moderate
Oct21Moderate
Nov17Moderate
Dec17Moderate
Location & terrain

Where is São Lourenço da Serra?

São Lourenço da Serra sits at 23.9°S, 46.9°W, 706 m above sea level, in Brazil. The nearest listed city is Embu-Guaçu, 14 km away.

Topography around São Lourenço da Serra

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Lourenço da Serra.

Within 3 km, the terrain around São Lourenço da Serra has only modest variations in elevation — a maximum elevation change of 184 m around an average of 759 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 417 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,416 m.

The land around São Lourenço da Serra is covered by trees (87%) within 3 km, trees (90%) within 16 km, and trees (59%) within 80 km.

3 km
184 m
16 km
417 m
80 km
1,416 m
treesgrasslandcroplandartificial surfaceswatermangroves
May weather nearby: Embu-Guaçu 14 km · Juquitiba 16 km · Itapecerica da Serra 18 km · Parelheiros 22 km · Jardim Angela 23 km · Embu das Artes 24 km · Capao Redondo 26 km · Cotia 28 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 São Lourenço da Serra (-23.8525°, -46.9425°, elevation 706 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. 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).