Birigui weather in December

In December, Birigui sees average daytime highs of 31°C and overnight lows near 22°C, with 182 mm of rain across 20.3 wet days and about 13.3 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 18% 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 Birigui's 11th-clearest and 8th-windiest month. For the whole year in context, see Birigui's year-round climate.

Daytime high
31°
4th warmest
Overnight low
22°
10th coldest
Rainfall
182 mm
20.3 wet days
Daylight
13 h 18 min
6:39 AM – 7:56 PM
Cloud cover
69%
11th clearest
Wind
9 km/h
8th windiest
Solar energy
5.94 kWh/m²
Travel score
3.5
out of 10

Birigui 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 Birigui reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°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)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233123
243123
253123
263123
273123
283123
293123
303123
313123

How December really feels in Birigui

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.

Birigui 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°24422.313.23.4
Feb31° / 23°17518.712.73.5
Mar31° / 22°14117.912.24.0
Apr30° / 20°577.611.55.5
May27° / 17°465.5117.2
Jun27° / 16°293.510.77.8
Jul28° / 16°192.410.87.8
Aug30° / 17°202.811.36.3
Sep31° / 19°586.511.94.9
Oct32° / 21°10211.612.54.1
Nov31° / 21°14215.2133.8
Dec31° / 22°18220.313.33.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33367
43367
53268
63268
73169
83268
93367
103268
113268
123466
133565
143565
153664
163664
173664
183862
193862
203862
213862
223763
233763
243664
253565
263565
273466
283367
293268
303268
313070

Chance of precipitation in December

Any precipitation

Birigui gets around 182 mm of rain over 20.3 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 65% and peaks near 71% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
159
261
362
463
564
665
766
866
966
1066
1166
1266
1366
1466
1565
1665
1765
1864
1964
2064
2164
2264
2365
2466
2566
2667
2768
2869
2970
3070
3171

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12153349
22143252
32133253
42123155
52113156
61103059
7193060
8193060
9183061
10173062
11173062
12173062
13063163
14063163
15063163
16053263
17053263
18053263
19043264
20043363
21043264
22033265
23033265
24033166
25033166
26033067
27032968
28022870
29022771
30032671
31032572

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
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 6:35 AM to 6:46 AM, and sunset from 7:47 PM to 8:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:357:47
213.26:357:48
313.26:357:48
413.26:357:49
513.26:367:50
613.26:367:50
713.26:367:51
813.36:367:52
913.36:377:52
1013.36:377:53
1113.36:377:53
1213.36:377:54
1313.36:387:55
1413.36:387:55
1513.36:387:56
1613.36:397:56
1713.36:397:57
1813.36:407:57
1913.36:407:58
2013.36:417:58
2113.36:417:59
2213.36:417:59
2313.36:428:00
2413.36:428:00
2513.36:438:01
2613.36:438:01
2713.36:448:01
2813.36:448:02
2913.36:458:02
3013.36:468:03
3113.36:468:03

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.94 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 6.12 kWh/m² in November across the year — December's 5.94 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
176.0Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Birigui

In seasonPeak

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

Birigui'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 Birigui?

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

3.5
Sightseeing
10th-best month of the year
5.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Birigui.

What to pack for Birigui in December

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

In December, Birigui sees daytime highs around 31°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Birigui 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 Birigui peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 22UV 15Jun 23UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in Birigui 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 Birigui is worst in September — around 21 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1620 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May9Good
Jun9Good
Jul8Good
Aug13Moderate
Sep21Moderate
Oct13Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Birigui?

Birigui sits at 21.3°S, 50.3°W, 409 m above sea level, in Brazil. The nearest listed city is Araçatuba, 13 km away.

Topography around Birigui

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

Within 3 km, the terrain around Birigui has only modest variations in elevation — a maximum elevation change of 107 m around an average of 418 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 164 m; within 80 km, significant variations in elevation — a maximum elevation change of 283 m.

The land around Birigui is covered by artificial surfaces (59%) within 3 km, cropland (58%) and grassland (24%) within 16 km, and cropland (57%) and grassland (25%) within 80 km.

3 km
107 m
16 km
164 m
80 km
283 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Araçatuba 13 km · Penápolis 31 km · Guararapes 32 km · Buritama 32 km · Valparaíso 55 km · Promissão 57 km · Tupã 74 km · Lins 76 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 Birigui (-21.2886°, -50.34°, elevation 409 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).