São Bernardo weather in December

In December, São Bernardo sees average daytime highs of 35°C and overnight lows near 24°C, with 49 mm of rain across 7.3 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 24% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of December to 12 h 12 min by month's end. Set against the rest of the year, December is São Bernardo's 7th-clearest and 4th-windiest month. For the whole year in context, see São Bernardo's year-round climate.

Daytime high
35°
4th warmest
Overnight low
24°
12th coldest
Rainfall
49 mm
7.3 wet days
Daylight
12 h 12 min
5:40 AM – 5:52 PM
Cloud cover
61%
7th clearest
Wind
14 km/h
4th windiest
Solar energy
5.82 kWh/m²
Travel score
2.7
out of 10

São Bernardo 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 35°C through the month.

A typical December day in São Bernardo reaches about 35°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 37°C. Set against its neighbours, December runs about 1°C cooler than November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13525
23525
33525
43525
53525
63525
73525
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183525
193524
203524
213424
223424
233424
243424
253424
263424
273424
283424
293424
303424
313424

How December really feels in São Bernardo

Once humidity and wind are folded in, December averages 31 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
31
11 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São Bernardo weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°16619.512.22.8
Feb31° / 24°21722.312.12.8
Mar31° / 24°28127.2122.7
Apr31° / 23°29425.711.92.8
May31° / 24°18018.511.83.5
Jun32° / 23°44911.84.3
Jul33° / 23°233.811.84.4
Aug34° / 23°40.811.93.6
Sep36° / 24°20.5122.8
Oct36° / 24°81.312.12.5
Nov36° / 24°132.712.22.5
Dec35° / 24°497.312.22.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55545
65446
75446
85446
95347
105347
115347
125248
135248
145149
155050
165050
174951
184852
194852
204753
214654
224654
234555
244555
254456
264456
274456
284258
294258
304159
314060

Chance of precipitation in December

Any precipitation

São Bernardo gets around 49 mm of rain over 7.3 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 25% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
113
213
313
414
514
615
715
816
917
1018
1119
1219
1320
1421
1522
1623
1724
1825
1926
2027
2128
2229
2330
2432
2533
2635
2737
2839
2940
3042
3144

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
14456
24357
34357
44258
54159
64060
73961
83862
93763
103664
113565
123466
133367
143169
153070
162971
172872
182773
192575
202476
212377
222278
232179
242080
251981
261882
271783
281783
291684
301585
311585

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 12 min at the start of December to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:34 AM to 5:47 AM, and sunset from 5:45 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:345:45
212.25:345:45
312.25:355:46
412.25:355:46
512.25:355:47
612.25:365:47
712.25:365:47
812.25:375:48
912.25:375:48
1012.25:375:49
1112.25:385:49
1212.25:385:50
1312.25:395:50
1412.25:395:51
1512.25:405:51
1612.25:405:52
1712.25:405:52
1812.25:415:53
1912.25:415:53
2012.25:425:54
2112.25:425:54
2212.25:435:54
2312.25:435:55
2412.25:445:55
2512.25:445:56
2612.25:455:56
2712.25:455:57
2812.25:465:57
2912.25:465:58
3012.25:475:58
3112.25:475:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.82 kWh/m².

For context, solar energy here swings from a low near 4.64 kWh/m² to a high of 6.67 kWh/m² in October across the year — December's 5.82 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.0Intense
86.0Intense
96.0Intense
106.0Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for São Bernardo

In seasonPeak

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

São Bernardo's monsoon runs January–May, when most of the year's rain falls.

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

Is December a good time to visit São Bernardo?

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

2.7
Sightseeing
9th-best month of the year
5.8
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in São Bernardo.

What to pack for São Bernardo in December

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

In December, São Bernardo sees daytime highs around 35°C and nights near 24°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in São Bernardo in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (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 Bernardo peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 16UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São Bernardo 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 Bernardo is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (May, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodModerateJul 1719 µg/m³May 219 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar14Moderate
Apr11Good
May8Good
Jun9Good
Jul20Moderate
Aug12Good
Sep9Good
Oct11Good
Nov14Moderate
Dec14Moderate
Location & terrain

Where is São Bernardo?

São Bernardo sits at 3.4°S, 42.4°W, 29 m above sea level, in Brazil. The nearest listed city is Luzilândia, 12 km away.

Topography around São Bernardo

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

Within 3 km, the terrain around São Bernardo has only modest variations in elevation — a maximum elevation change of 69 m around an average of 43 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, only modest variations in elevation — a maximum elevation change of 246 m.

The land around São Bernardo is covered by trees (63%) and grassland (28%) within 3 km, trees (60%) and grassland (24%) within 16 km, and trees (59%) within 80 km.

3 km
69 m
16 km
110 m
80 km
246 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Luzilândia 12 km · Santa Quitéria do Maranhão 22 km · Brejo 51 km · Esperantina 63 km · Buriti dos Lopes 65 km · Tutóia 69 km · Paulino Neves 73 km · Araioses 78 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 Bernardo (-3.3614°, -42.4178°, elevation 29 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).