Caxias weather in December

In December, Caxias sees average daytime highs of 34°C and overnight lows near 24°C, with 104 mm of rain across 13 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 33°C by the end. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 18 min by month's end. Set against the rest of the year, December is Caxias's 8th-clearest and 7th-windiest month. For the whole year in context, see Caxias's year-round climate.

Daytime high
34°
5th warmest
Overnight low
24°
10th coldest
Rainfall
104 mm
13 wet days
Daylight
12 h 18 min
5:41 AM – 5:58 PM
Cloud cover
66%
8th clearest
Wind
7 km/h
7th windiest
Solar energy
5.56 kWh/m²
Travel score
2.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 33°C by the end.

A typical December day in Caxias reaches about 34°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 31°C and 37°C. Set against its neighbours, December runs about 2°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
93425
103425
113425
123425
133425
143424
153424
163424
173424
183424
193424
203424
213424
223424
233424
243324
253324
263324
273324
283324
293324
303324
313324

How December really feels in Caxias

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
heat index over the day's high
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.

Caxias weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°23624.312.32.7
Feb31° / 23°27223.412.22.7
Mar31° / 23°34527.9122.6
Apr31° / 23°28225.311.92.8
May32° / 23°12814.911.83.7
Jun32° / 23°224.411.74.4
Jul33° / 23°101.811.74.2
Aug35° / 23°30.511.83.5
Sep36° / 24°51.1122.6
Oct36° / 25°142.412.12.2
Nov35° / 25°477.112.22.5
Dec34° / 24°1041312.32.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55050
65050
74951
84951
94753
104753
114654
124555
134555
144258
154159
164060
174060
183961
193862
203763
213664
223565
233565
243466
253367
263268
273268
283169
293169
303070
312971

Chance of precipitation in December

Any precipitation

Caxias gets around 104 mm of rain over 13 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 43% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
129
229
329
429
530
630
731
832
933
1034
1135
1236
1338
1439
1541
1642
1744
1845
1946
2048
2149
2250
2352
2453
2554
2656
2757
2859
2960
3061
3163

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1232642
2132652
3132652
4132652
5132652
6131662
7131662
8130681
9129691
10129691
11028711
12027721
13025741
14024751
15023761
16022762
17021772
18020782
19019792
20018802
21017803
22016813
23015823
24015814
25014824
26013825
27112825
28112816
29111826
30110836
31110827

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 18 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 5:35 AM to 5:48 AM, and sunset from 5:51 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:355:51
212.35:365:51
312.35:365:52
412.35:365:52
512.35:375:53
612.35:375:53
712.35:375:54
812.35:385:54
912.35:385:55
1012.35:395:55
1112.35:395:56
1212.35:395:56
1312.35:405:57
1412.35:405:57
1512.35:415:58
1612.35:415:58
1712.35:425:58
1812.35:425:59
1912.35:435:59
2012.35:436:00
2112.35:436:00
2212.35:446:01
2312.35:446:01
2412.35:456:02
2512.35:456:02
2612.35:466:03
2712.35:466:03
2812.35:476:04
2912.35:476:04
3012.35:486:04
3112.35:486:05

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.56 kWh/m².

For context, solar energy here swings from a low near 4.57 kWh/m² to a high of 6.53 kWh/m² in October across the year — December's 5.56 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in December

Hazard calendar for Caxias

In seasonPeak

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

Caxias's monsoon runs January–April, 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 Caxias?

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

2.7
Sightseeing
6th-best month of the year
5.3
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Caxias.

What to pack for Caxias in December

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

In December, Caxias sees daytime highs around 34°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Caxias 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 Caxias peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Caxias 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 Caxias is worst in October — around 33 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (May, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 1532 µg/m³May 1512 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar14Moderate
Apr13Moderate
May11Good
Jun13Moderate
Jul27Moderate
Aug28Moderate
Sep29Moderate
Oct33Moderate
Nov28Moderate
Dec20Moderate
Location & terrain

Where is Caxias?

Caxias sits at 4.9°S, 43.4°W, 83 m above sea level, in Brazil. The nearest listed city is Aldeias Altas, 29 km away.

Topography around Caxias

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

Within 3 km, the terrain around Caxias has only modest variations in elevation — a maximum elevation change of 73 m around an average of 82 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 147 m; within 80 km, significant variations in elevation — a maximum elevation change of 259 m.

The land around Caxias is covered by artificial surfaces (42%) and trees (31%) within 3 km, trees (67%) and shrubs (21%) within 16 km, and trees (70%) within 80 km.

3 km
73 m
16 km
147 m
80 km
259 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Aldeias Altas 29 km · São João do Soter 58 km · União 62 km · Timon 63 km · Teresina 67 km · Codó 74 km · Matões 75 km · Coelho Neto 77 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 Caxias (-4.8589°, -43.3561°, elevation 83 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).