Júlio de Castilhos weather in December

In December, Júlio de Castilhos sees average daytime highs of 28°C and overnight lows near 18°C, with 172 mm of rain across 13.2 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 3rd-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 35% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of December to 13 h 48 min by month's end. Set against the rest of the year, December is Júlio de Castilhos's 6th-clearest and 7th-windiest month. For the whole year in context, see Júlio de Castilhos's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
18°
10th coldest
Rainfall
172 mm
13.2 wet days
Daylight
13 h 54 min
6:35 AM – 8:27 PM
Cloud cover
56%
6th clearest
Wind
12 km/h
7th windiest
Solar energy
6.69 kWh/m²
Travel score
5.5
out of 10

Júlio de Castilhos 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 Júlio de Castilhos reaches about 28°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12816
22817
32817
42817
52817
62817
72817
82817
92817
102817
112817
122817
132817
142817
152818
162818
172918
182918
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302919
312919

Júlio de Castilhos weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 19°17315.513.75.0
Feb28° / 18°14514.2135.4
Mar27° / 17°13212.612.26.2
Apr24° / 15°14610.411.36.8
May20° / 11°1289.210.66.5
Jun18° / 10°13610.110.25.9
Jul18° / 15810.310.35.9
Aug20° / 10°1309.9116.5
Sep21° / 12°16711.211.86.3
Oct24° / 14°22613.212.76.4
Nov26° / 15°15111.313.56.5
Dec28° / 18°17213.213.85.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35347
45347
55446
65446
75446
85446
95347
105446
115446
125545
135446
145545
155545
165545
175545
185545
195545
205545
215545
225446
235446
245446
255347
265347
275248
285347
295248
305248
315248

Chance of precipitation in December

Any precipitation

Júlio de Castilhos gets around 172 mm of rain over 13.2 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 42% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
139
239
339
439
539
639
739
839
940
1040
1140
1240
1340
1441
1541
1642
1742
1843
1943
2043
2144
2244
2345
2445
2546
2646
2746
2847
2947
3047
3147

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1182632222
2182632232
3172632232
4172532243
5172531243
6162531253
7162431263
8152431273
9152431273
10142331283
11142331294
12132331304
13132230304
14122130315
15122130325
16112030336
17112029347
18101929347
19101928358
2091928359
21918273610
22818273611
23718263712
24717263713
25617263714
26617253715
27517253716
28517253717
29516253717
30416253718
31416253718

Wind in December

Winds average 12 km/h in December.

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

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 42 min at the start of December to 13 h 48 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 6:32 AM to 6:42 AM, and sunset from 8:17 PM to 8:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.76:328:17
213.76:328:17
313.86:328:18
413.86:338:19
513.86:338:19
613.86:338:20
713.86:338:21
813.86:338:22
913.86:338:22
1013.86:338:23
1113.86:348:24
1213.86:348:24
1313.86:348:25
1413.96:348:26
1513.96:358:26
1613.96:358:27
1713.96:358:27
1813.96:368:28
1913.96:368:28
2013.96:378:29
2113.96:378:29
2213.96:388:30
2313.96:388:30
2413.96:398:31
2513.96:398:31
2613.96:408:32
2713.96:408:32
2813.96:418:32
2913.96:418:33
3013.96:428:33
3113.86:428:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.69 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 6.69 kWh/m² in December across the year — December's 6.69 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in December

Is December a good time to visit Júlio de Castilhos?

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

5.5
Sightseeing
10th-best month of the year
6.5
Beach & pool
1st-best month of the year

December is a reasonable time to visit Júlio de Castilhos for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Júlio de Castilhos in December

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

In December, Júlio de Castilhos sees daytime highs around 28°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

UV index in Júlio de Castilhos 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 Júlio de Castilhos peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 19UV 14Jun 20UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct6High
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Júlio de Castilhos?

Júlio de Castilhos sits at 29.2°S, 53.7°W, 529 m above sea level, in Brazil. The nearest listed city is Tupanciretã, 22 km away.

Topography around Júlio de Castilhos

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

Within 3 km, the terrain around Júlio de Castilhos has only modest variations in elevation — a maximum elevation change of 99 m around an average of 483 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, large variations in elevation — a maximum elevation change of 619 m.

The land around Júlio de Castilhos is covered by cropland (47%) and grassland (21%) within 3 km, cropland (72%) within 16 km, and cropland (58%) and trees (24%) within 80 km.

3 km
99 m
16 km
186 m
80 km
619 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Tupanciretã 22 km · Santa Maria 52 km · Agudo 63 km · São Pedro do Sul 65 km · Cruz Alta 65 km · Ibirubá 88 km · Ijuí 96 km · Espumoso 98 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 Júlio de Castilhos (-29.2269°, -53.6817°, elevation 529 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).