Ibiúna weather in December

In December, Ibiúna sees average daytime highs of 26°C and overnight lows near 18°C, with 208 mm of rain across 22.3 wet days and about 13.4 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 11% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 24 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Ibiúna's 11th-clearest and 4th-windiest month. For the whole year in context, see Ibiúna's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
18°
9th coldest
Rainfall
208 mm
22.3 wet days
Daylight
13 h 30 min
6:22 AM – 7:49 PM
Cloud cover
75%
11th clearest
Wind
11 km/h
4th windiest
Solar energy
5.63 kWh/m²
Travel score
4.7
out of 10

Ibiúna 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 26°C through the month.

A typical December day in Ibiúna reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12517
22517
32517
42517
52517
62617
72617
82617
92617
102618
112618
122618
132618
142618
152618
162618
172618
182618
192618
202618
212618
222618
232618
242618
252618
262618
272618
282618
292618
302618
312618

Ibiúna weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 19°2752513.34.2
Feb27° / 19°21421.812.84.3
Mar26° / 18°18021.712.24.9
Apr25° / 16°7811.911.56.5
May22° / 14°688.710.96.8
Jun21° / 13°58610.67.2
Jul21° / 12°595.810.77.3
Aug22° / 13°465.511.27.6
Sep23° / 14°999.911.96.8
Oct24° / 15°13015.612.65.8
Nov25° / 16°1691813.15.4
Dec26° / 18°20822.313.44.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22674
32575
42575
52377
62377
72377
82476
92377
102377
112377
122377
132377
142476
152476
162476
172476
182476
192575
202674
212674
222674
232674
242575
252575
262476
272377
282377
292377
302179
312179

Chance of precipitation in December

Any precipitation

Ibiúna gets around 208 mm of rain over 22.3 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 72% and peaks near 76% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
165
266
367
468
568
669
770
870
970
1071
1171
1272
1372
1472
1572
1673
1773
1873
1973
2073
2173
2273
2373
2474
2574
2674
2775
2875
2976
3076
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 53% of days. Sticky, muggy-or-worse air turns up on roughly 54% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121943370
221842380
311742400
411741410
511640430
611639440
711538460
811537470
911536490
1011435500
1111435500
1211334520
1311334520
1411334520
1511233540
1601233550
1701133560
1801133560
1901133560
2001033561
210932581
220932581
230832591
240832591
250732601
260631621
270631621
280630631
290529642
300529642
310528652

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 24 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 6:18 AM to 6:29 AM, and sunset from 7:39 PM to 7:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:187:39
213.46:187:40
313.46:187:41
413.46:187:41
513.46:197:42
613.46:197:43
713.46:197:43
813.46:197:44
913.46:197:44
1013.46:207:45
1113.46:207:46
1213.46:207:46
1313.46:207:47
1413.46:217:47
1513.46:217:48
1613.56:227:49
1713.56:227:49
1813.56:227:50
1913.56:237:50
2013.56:237:51
2113.56:247:51
2213.56:247:52
2313.56:257:52
2413.56:257:53
2513.56:267:53
2613.56:267:53
2713.56:277:54
2813.56:277:54
2913.46:287:55
3013.46:287:55
3113.46:297:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.23 kWh/m² to a high of 5.63 kWh/m² in December across the year — December's 5.63 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in December

Hazard calendar for Ibiúna

In seasonPeak

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

Ibiúna's rainy season runs October–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Ibiúna?

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

4.7
Sightseeing
10th-best month of the year
4.5
Beach & pool
10th-best month of the year

December is a reasonable time to visit Ibiúna for sightseeing.

What to pack for Ibiúna in December

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

In December, Ibiúna sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 22 days see rain.

rain gearlight clothessun protection

UV index in Ibiúna 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 Ibiúna peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 21UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Ibiúna 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 Ibiúna is worst in July — around 33 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 2033 µg/m³Jan 1817 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb17Moderate
Mar18Moderate
Apr20Moderate
May24Moderate
Jun30Moderate
Jul33Moderate
Aug32Moderate
Sep29Moderate
Oct21Moderate
Nov17Moderate
Dec17Moderate
Location & terrain

Where is Ibiúna?

Ibiúna sits at 23.7°S, 47.2°W, 868 m above sea level, in Brazil. The nearest listed city is Mairinque, 13 km away.

Topography around Ibiúna

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

Within 3 km, the terrain around Ibiúna has only modest variations in elevation — a maximum elevation change of 150 m around an average of 876 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 403 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,388 m.

The land around Ibiúna is covered by trees (47%) and grassland (32%) within 3 km, trees (58%) and grassland (31%) within 16 km, and trees (61%) within 80 km.

3 km
150 m
16 km
403 m
80 km
1,388 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Mairinque 13 km · Alumínio 14 km · São Roque 17 km · Vargem Grande Paulista 21 km · Piedade 22 km · Votorantim 25 km · Araçariguama 29 km · Sorocaba 30 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 Ibiúna (-23.6564°, -47.2225°, elevation 868 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).