Barretos weather in December

In December, Barretos sees average daytime highs of 30°C and overnight lows near 22°C, with 226 mm of rain across 22.7 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 13% 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 12 min by month's end. Set against the rest of the year, December is Barretos's 11th-clearest and 8th-windiest month. For the whole year in context, see Barretos's year-round climate.

Daytime high
30°
5th warmest
Overnight low
22°
11th coldest
Rainfall
226 mm
22.7 wet days
Daylight
13 h 12 min
6:33 AM – 7:48 PM
Cloud cover
73%
11th clearest
Wind
7 km/h
8th windiest
Solar energy
5.85 kWh/m²
Travel score
3.4
out of 10

Barretos 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 30°C through the month.

A typical December day in Barretos reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°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)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Barretos

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.

Barretos weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°25923.113.13.4
Feb30° / 22°18819.312.73.6
Mar30° / 21°17119.512.13.9
Apr30° / 20°638.511.55.4
May28° / 17°355.1117.2
Jun27° / 16°212.610.88.0
Jul28° / 16°131.710.97.9
Aug30° / 17°152.311.36.3
Sep32° / 19°556.411.94.8
Oct32° / 21°10512.412.53.9
Nov31° / 21°16017.8133.7
Dec30° / 22°22622.713.23.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23070
32971
42872
52674
62674
72674
82575
92575
102674
112674
122773
132674
142773
152872
162971
172971
183070
193169
203169
213268
223268
233268
243169
253268
263169
273070
282971
292971
302872
312872

Chance of precipitation in December

Any precipitation

Barretos gets around 226 mm of rain over 22.7 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 73% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
167
268
370
471
572
672
773
873
973
1073
1173
1273
1373
1472
1572
1672
1772
1872
1972
2072
2172
2272
2372
2473
2574
2674
2775
2875
2975
3075
3176

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
113145032
203125134
302115136
402105137
50295138
60285139
70285040
80175141
90175141
100165241
110165241
120055441
130055540
140055540
150055639
160055639
170045838
180045838
190045838
200045838
210045838
220035938
230035839
240035740
250035641
260035542
270035344
280035245
290035146
300035047
310034948

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
148calm
158calm
168calm
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 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 6:29 AM to 6:41 AM, and sunset from 7:39 PM to 7:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:297:39
213.26:297:39
313.26:307:40
413.26:307:41
513.26:307:41
613.26:307:42
713.26:307:42
813.26:317:43
913.26:317:44
1013.26:317:44
1113.26:317:45
1213.26:327:45
1313.26:327:46
1413.26:327:47
1513.26:337:47
1613.26:337:48
1713.26:347:48
1813.26:347:49
1913.26:347:49
2013.26:357:50
2113.26:357:50
2213.26:367:51
2313.26:367:51
2413.26:377:52
2513.26:377:52
2613.26:387:52
2713.26:387:53
2813.26:397:53
2913.26:397:54
3013.26:407:54
3113.26:417:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.85 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.14 kWh/m² in October across the year — December's 5.85 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Barretos

In seasonPeak

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

Barretos'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 Barretos?

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

3.4
Sightseeing
11th-best month of the year
4.8
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Barretos.

What to pack for Barretos in December

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

In December, Barretos sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Barretos 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 Barretos peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 23UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Barretos 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 Barretos is worst in September — around 34 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (November, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1533 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr9Good
May10Good
Jun10Good
Jul9Good
Aug21Moderate
Sep34Moderate
Oct18Moderate
Nov7Good
Dec8Good
Location & terrain

Where is Barretos?

Barretos sits at 20.6°S, 48.6°W, 538 m above sea level, in Brazil. The nearest listed city is Colina, 18 km away.

Topography around Barretos

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

Within 3 km, the terrain around Barretos has only modest variations in elevation — a maximum elevation change of 92 m around an average of 551 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 431 m.

The land around Barretos is covered by artificial surfaces (61%) within 3 km, cropland (69%) and trees (20%) within 16 km, and cropland (72%) within 80 km.

3 km
92 m
16 km
191 m
80 km
431 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Colina 18 km · Guaíra 38 km · Monte Azul Paulista 40 km · Olímpia 41 km · Bebedouro 45 km · Viradouro 45 km · Morro Agudo 56 km · Pitangueiras 62 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 Barretos (-20.5572°, -48.5678°, elevation 538 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).