São Roque weather in December

In December, São Roque sees average daytime highs of 28°C and overnight lows near 19°C, with 179 mm of rain across 20.1 wet days and about 13.4 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is São Roque's 11th-clearest and 5th-windiest month. For the whole year in context, see São Roque's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
179 mm
20.1 wet days
Daylight
13 h 24 min
6:21 AM – 7:48 PM
Cloud cover
70%
11th clearest
Wind
10 km/h
5th windiest
Solar energy
5.85 kWh/m²
Travel score
4.8
out of 10

São Roque 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 28°C through the month.

A typical December day in São Roque reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12718
22718
32718
42718
52718
62718
72718
82718
92818
102818
112819
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282819
292819
302819
312819

São Roque weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°22922.313.34.4
Feb28° / 19°16118.812.84.4
Mar28° / 19°12617.712.25.3
Apr26° / 17°608.511.56.9
May24° / 14°596.910.97.4
Jun23° / 13°485.310.67.7
Jul23° / 12°454.910.77.9
Aug24° / 13°374.711.28.1
Sep26° / 15°82911.97.0
Oct26° / 17°10913.112.66.0
Nov27° / 17°14115.613.15.5
Dec28° / 19°17920.113.44.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33169
43070
53070
63169
73070
83070
93169
103169
113070
123169
133169
143268
153268
163268
173367
183466
193466
203565
213565
223565
233565
243466
253367
263367
273169
283169
292971
302971
312872

Chance of precipitation in December

Any precipitation

São Roque gets around 179 mm of rain over 20.1 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 65% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
259
359
460
561
661
762
862
963
1063
1164
1264
1365
1465
1565
1666
1766
1866
1967
2067
2167
2267
2367
2467
2568
2668
2768
2868
2968
3069
3169

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121740401
221639421
321638431
411538451
511437461
611436481
711335491
811334511
911333521
1011232541
1111232541
1211132551
1311131561
1411131561
1501031581
1601031581
1701031581
180931582
190931582
200931582
210831592
220830593
230730603
240730603
250730594
260629614
270629614
280629605
290528625
300528625
310527635

Wind in December

Winds average 10 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
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 18 min at the start of December to 13 h 24 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 6:18 AM to 6:29 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)
113.36:187:39
213.46:187:39
313.46:187:40
413.46:187:41
513.46:187:41
613.46:197:42
713.46:197:43
813.46:197:43
913.46:197:44
1013.46:207:44
1113.46:207:45
1213.46:207:46
1313.46:207:46
1413.46:217:47
1513.46:217:47
1613.46:217:48
1713.46:227:49
1813.46:227:49
1913.46:237:50
2013.46:237:50
2113.56:247:51
2213.56:247:51
2313.56:247:52
2413.46:257:52
2513.46:257:52
2613.46:267:53
2713.46:277:53
2813.46:277:54
2913.46:287:54
3013.46:287:54
3113.46:297:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.85 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.43 kWh/m² to a high of 5.85 kWh/m² in December across the year — December's 5.85 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for São Roque

In seasonPeak

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

São Roque'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 Roque?

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

4.8
Sightseeing
10th-best month of the year
5.1
Beach & pool
10th-best month of the year

December is a reasonable time to visit São Roque for sightseeing.

What to pack for São Roque in December

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

In December, São Roque sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in São Roque in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (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 Roque peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 21UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in São Roque 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 Roque is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (January, 18 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1838 µg/m³Jan 1018 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar22Moderate
Apr26Moderate
May31Moderate
Jun35Poor
Jul38Poor
Aug36Poor
Sep35Poor
Oct25Moderate
Nov18Moderate
Dec18Moderate
Location & terrain

Where is São Roque?

São Roque sits at 23.5°S, 47.1°W, 773 m above sea level, in Brazil. The nearest listed city is Mairinque, 5.0 km away.

Topography around São Roque

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

Within 3 km, the terrain around São Roque has significant variations in elevation — a maximum elevation change of 349 m around an average of 842 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 520 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,404 m.

The land around São Roque is covered by trees (55%) and artificial surfaces (25%) within 3 km, trees (66%) and grassland (25%) within 16 km, and trees (57%) within 80 km.

3 km
349 m
16 km
520 m
80 km
1,404 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Mairinque 5.0 km · Araçariguama 13 km · Alumínio 13 km · Vargem Grande Paulista 14 km · Ibiúna 17 km · Pirapora do Bom Jesus 20 km · Itapevi 21 km · Cotia 24 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 Roque (-23.5292°, -47.1353°, elevation 773 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).