Casa Branca weather in December

In December, Casa Branca sees average daytime highs of 29°C and overnight lows near 20°C, with 199 mm of rain across 21.7 wet days and about 13.3 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 18 min by month's end. Set against the rest of the year, December is Casa Branca's 11th-clearest and 7th-windiest month. For the whole year in context, see Casa Branca's year-round climate.

Daytime high
29°
6th warmest
Overnight low
20°
10th coldest
Rainfall
199 mm
21.7 wet days
Daylight
13 h 18 min
6:25 AM – 7:44 PM
Cloud cover
71%
11th clearest
Wind
7 km/h
7th windiest
Solar energy
5.82 kWh/m²
Travel score
4.1
out of 10

Casa Branca 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 29°C through the month.

A typical December day in Casa Branca reaches about 29°C in the afternoon and slips back to 20°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12920
22920
32920
42920
52920
62920
72920
82920
92920
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
212920
222920
232920
242920
252920
262920
272920
282920
292920
302920
312920

Casa Branca weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°23522.313.23.9
Feb29° / 20°16418.612.74.1
Mar29° / 19°14117.712.24.7
Apr28° / 18°588.511.56.5
May25° / 15°466117.6
Jun25° / 14°263.410.78.3
Jul25° / 13°222.610.88.4
Aug27° / 15°193.211.37.9
Sep29° / 17°647.411.96.1
Oct29° / 19°9813.312.54.9
Nov29° / 19°15417.1134.6
Dec29° / 20°19921.713.34.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33565
43466
53367
63367
73367
83367
93367
103268
113268
123367
133367
143466
153466
163466
173466
183466
193367
203367
213367
223367
233367
243367
253268
263169
273070
283070
292872
302872
312872

Chance of precipitation in December

Any precipitation

Casa Branca gets around 199 mm of rain over 21.7 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 70% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
160
261
362
463
564
665
765
866
967
1068
1169
1269
1370
1471
1571
1672
1772
1872
1973
2073
2173
2274
2374
2474
2574
2674
2774
2874
2974
3074
3173

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 68% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111034541
21933561
31932571
41831591
51731601
61630621
71629631
81528651
91527661
101426681
110426691
120425701
130425701
140325711
150325711
160325711
170325711
180325711
190225721
200226711
210226711
220226711
230225712
240225712
250125722
260124732
270124732
280124723
290123733
300123733
310123733

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 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
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 min at the start of December to 13 h 18 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 6:21 AM to 6:32 AM, and sunset from 7:35 PM to 7:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:217:35
213.26:217:36
313.36:217:36
413.36:227:37
513.36:227:38
613.36:227:38
713.36:227:39
813.36:227:40
913.36:237:40
1013.36:237:41
1113.36:237:41
1213.36:237:42
1313.36:247:42
1413.36:247:43
1513.36:247:44
1613.36:257:44
1713.36:257:45
1813.36:267:45
1913.36:267:46
2013.36:277:46
2113.36:277:47
2213.36:277:47
2313.36:287:48
2413.36:287:48
2513.36:297:49
2613.36:297:49
2713.36:307:49
2813.36:307:50
2913.36:317:50
3013.36:327:51
3113.36:327:51

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 3.88 kWh/m² to a high of 5.96 kWh/m² in October across the year — December's 5.82 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
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
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Casa Branca

In seasonPeak

In December, Casa Branca sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Casa Branca'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 December a good time to visit Casa Branca?

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

4.1
Sightseeing
10th-best month of the year
5.1
Beach & pool
11th-best month of the year

December is a reasonable time to visit Casa Branca for sightseeing.

What to pack for Casa Branca in December

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

In December, Casa Branca sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Casa Branca 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 Casa Branca peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Casa Branca 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 Casa Branca is worst in September — around 32 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1430 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug23Moderate
Sep32Moderate
Oct16Moderate
Nov10Good
Dec10Good
Location & terrain

Where is Casa Branca?

Casa Branca sits at 21.8°S, 47.1°W, 692 m above sea level, in Brazil. The nearest listed city is Santa Cruz das Palmeiras, 18 km away.

Topography around Casa Branca

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

Within 3 km, the terrain around Casa Branca has only modest variations in elevation — a maximum elevation change of 117 m around an average of 701 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 419 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,281 m.

The land around Casa Branca is covered by cropland (34%), trees (31%) and artificial surfaces (20%) within 3 km, cropland (53%) and trees (34%) within 16 km, and trees (39%), cropland (35%) and grassland (23%) within 80 km.

3 km
117 m
16 km
419 m
80 km
1,281 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Santa Cruz das Palmeiras 18 km · Tambaú 21 km · Vargem Grande do Sul 21 km · São José do Rio Pardo 28 km · Aguaí 34 km · Mococa 35 km · São João da Boa Vista 37 km · Santa Rita do Passa Quatro 41 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 Casa Branca (-21.7739°, -47.0864°, elevation 692 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).