São Lourenço da Serra weather in December

In December, São Lourenço da Serra sees average daytime highs of 26°C and overnight lows near 18°C, with 229 mm of rain across 23.1 wet days and about 13.4 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 24 min at the start of December to 13 h 30 min by month's end. Set against the rest of the year, December is São Lourenço da Serra's 10th-clearest and 4th-windiest month. For the whole year in context, see São Lourenço da Serra's year-round climate.

Daytime high
26°
4th warmest
Overnight low
18°
9th coldest
Rainfall
229 mm
23.1 wet days
Daylight
13 h 30 min
6:20 AM – 7:48 PM
Cloud cover
77%
10th clearest
Wind
11 km/h
4th windiest
Solar energy
5.67 kWh/m²
Travel score
4.6
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 December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical December day in São Lourenço da Serra reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°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, December runs about 1°C warmer than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12517
22517
32517
42517
52517
62517
72517
82517
92518
102618
112618
122618
132618
142618
152618
162618
172618
182618
192618
202618
212618
222618
232618
242618
252618
262618
272618
282618
292618
302619
312619

São Lourenço da Serra weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 3rd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22278
32179
42179
52179
62179
72179
82179
92080
102179
112179
122278
132278
142278
152278
162278
172278
182377
192377
202377
212377
222377
232377
242278
252179
262179
272080
282080
291882
301882
311882

Chance of precipitation in December

Any precipitation

São Lourenço da Serra gets around 229 mm of rain over 23.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 75% and peaks near 80% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
167
268
369
470
571
672
772
873
973
1074
1174
1274
1375
1475
1575
1676
1776
1876
1976
2076
2176
2276
2376
2477
2577
2678
2778
2879
2979
3080
3180

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 57% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111643400
211542420
301442440
401441450
501340460
601239480
701238491
801138501
901137511
1001036531
1101036531
120935551
130935551
140834571
150834571
160833581
170833581
180732601
190732601
200732601
210731611
220631621
230630631
240630622
250529642
260528652
270528652
280427672
290427663
300426673
310426673

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:17 AM to 6:27 AM, and sunset from 7:39 PM to 7:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:177:39
213.46:177:39
313.46:177:40
413.46:177:41
513.46:177:41
613.46:177:42
713.46:177:42
813.46:187:43
913.46:187:44
1013.46:187:44
1113.46:187:45
1213.46:197:46
1313.56:197:46
1413.56:197:47
1513.56:207:47
1613.56:207:48
1713.56:207:48
1813.56:217:49
1913.56:217:49
2013.56:227:50
2113.56:227:50
2213.56:237:51
2313.56:237:51
2413.56:247:52
2513.56:247:52
2613.56:257:53
2713.56:257:53
2813.56:267:53
2913.56:267:54
3013.56:277:54
3113.56:277:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.67 kWh/m² — the sunniest month for solar.

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 — December's 5.67 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in December

Hazard calendar for São Lourenço da Serra

In seasonPeak

In December, São Lourenço da Serra sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

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 December a good time to visit São Lourenço da Serra?

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

4.6
Sightseeing
10th-best month of the year
4.3
Beach & pool
10th-best month of the year

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

What to pack for São Lourenço da Serra in December

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

In December, São Lourenço da Serra sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 23 days see rain.

rain gearlight clothessun protection

Sea temperature near São Lourenço da Serra in December

The nearest coast averages about 25°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).