Castilho weather in December

In December, Castilho sees average daytime highs of 31°C and overnight lows near 23°C, with 189 mm of rain across 20.6 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 19% of the time in December, and the air most often feels oppressive.

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 Castilho's 11th-clearest and 8th-windiest month. For the whole year in context, see Castilho's year-round climate.

Daytime high
31°
4th warmest
Overnight low
23°
10th coldest
Rainfall
189 mm
20.6 wet days
Daylight
13 h 18 min
6:44 AM – 8:00 PM
Cloud cover
68%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
6.11 kWh/m²
Travel score
3.2
out of 10

Castilho 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 31°C through the month.

A typical December day in Castilho reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 35°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93223
103123
113123
123123
133123
143123
153123
163123
173123
183123
193223
203223
213223
223223
233223
243123
253123
263124
273124
283124
293124
303124
313124

How December really feels in Castilho

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.

Castilho weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°23021.913.13.2
Feb31° / 23°18819.212.73.2
Mar31° / 23°15717.812.13.7
Apr30° / 21°617.911.55.2
May28° / 18°475.7117.0
Jun28° / 17°263.510.87.7
Jul28° / 17°152.210.97.5
Aug31° / 18°212.911.35.8
Sep32° / 20°596.811.94.5
Oct32° / 22°10612.412.53.7
Nov32° / 23°14115.5133.5
Dec31° / 23°18920.613.23.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33466
43367
53268
63268
73169
83268
93268
103268
113367
123367
133466
143565
153664
163763
173862
183961
193961
203961
213961
224060
234060
243961
253961
263961
273862
283763
293763
303565
313565

Chance of precipitation in December

Any precipitation

Castilho gets around 189 mm of rain over 20.6 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 66% and peaks near 70% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
161
262
364
465
566
666
766
867
967
1066
1166
1266
1366
1465
1565
1665
1765
1865
1965
2065
2165
2266
2366
2467
2568
2668
2769
2869
2970
3070
3170

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 76% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12924641
22923651
32822671
42721691
52720701
62619721
72618731
81617751
91617751
101616761
111616761
121617751
131517761
141517761
150518761
160518761
170418771
180418771
190419761
200319771
210319771
220318781
230218791
240218791
250217801
260117802
270117802
280116812
290115822
300115822
310114823

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 6:40 AM to 6:52 AM, and sunset from 7:51 PM to 8:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:407:51
213.26:417:52
313.26:417:52
413.26:417:53
513.26:417:54
613.26:417:54
713.26:417:55
813.26:427:55
913.26:427:56
1013.26:427:57
1113.26:437:57
1213.26:437:58
1313.36:437:58
1413.36:447:59
1513.36:447:59
1613.36:448:00
1713.36:458:00
1813.36:458:01
1913.36:468:02
2013.36:468:02
2113.36:468:03
2213.36:478:03
2313.36:478:03
2413.36:488:04
2513.36:488:04
2613.36:498:05
2713.36:498:05
2813.36:508:06
2913.36:508:06
3013.36:518:06
3113.36:528:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.11 kWh/m².

For context, solar energy here swings from a low near 3.84 kWh/m² to a high of 6.22 kWh/m² in November across the year — December's 6.11 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.0Intense
106.0Intense
116.0Intense
126.0Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.2Intense
226.2Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.0Intense
306.0Intense
316.0Bright
Planning a trip in December

Hazard calendar for Castilho

In seasonPeak

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

Castilho's monsoon runs October–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 Castilho?

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

3.2
Sightseeing
10th-best month of the year
4.9
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Castilho.

What to pack for Castilho in December

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

In December, Castilho sees daytime highs around 31°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Castilho 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 Castilho peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 23UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug8Very high
Sep7Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in Castilho 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 Castilho is worst in September — around 20 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (July, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1719 µg/m³Jul 106 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr6Good
May7Good
Jun6Good
Jul6Good
Aug10Good
Sep20Moderate
Oct12Moderate
Nov6Good
Dec6Good
Location & terrain

Where is Castilho?

Castilho sits at 20.9°S, 51.5°W, 382 m above sea level, in Brazil. The nearest listed city is Andradina, 12 km away.

Topography around Castilho

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

Within 3 km, the terrain around Castilho has only modest variations in elevation — a maximum elevation change of 115 m around an average of 368 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 181 m; within 80 km, significant variations in elevation — a maximum elevation change of 260 m.

The land around Castilho is covered by cropland (52%) and grassland (31%) within 3 km, cropland (50%) and grassland (32%) within 16 km, and cropland (37%), grassland (31%) and trees (24%) within 80 km.

3 km
115 m
16 km
181 m
80 km
260 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Andradina 12 km · Três Lagoas 24 km · Pereira Barreto 47 km · Mirandópolis 49 km · Ilha Solteira 51 km · Tupi Paulista 57 km · Dracena 68 km · Junqueirópolis 72 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 Castilho (-20.8722°, -51.4875°, elevation 382 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).