Piracicaba weather in December

In December, Piracicaba sees average daytime highs of 30°C and overnight lows near 20°C, with 190 mm of rain across 19.9 wet days and about 13.4 hours of daylight. It is the 2nd-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 18% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Piracicaba's 11th-clearest and 5th-windiest month. For the whole year in context, see Piracicaba's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
20°
10th coldest
Rainfall
190 mm
19.9 wet days
Daylight
13 h 24 min
6:25 AM – 7:48 PM
Cloud cover
69%
11th clearest
Wind
9 km/h
5th windiest
Solar energy
6 kWh/m²
Travel score
3.8
out of 10
Air quality
Moderate
PM2.5 13 µg/m³ · 2019

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 Piracicaba reaches about 30°C in the afternoon and slips back to 20°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 34°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)
13020
23020
33020
43020
53020
63020
73020
83020
93020
103020
113020
123020
133020
143020
153020
163020
173020
183020
193020
203020
213020
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How December really feels in Piracicaba

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Piracicaba weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°25522.313.23.6
Feb30° / 21°1861912.83.7
Mar30° / 20°14417.112.24.4
Apr29° / 18°537.311.56.2
May26° / 15°52610.97.5
Jun25° / 14°384.510.68.0
Jul25° / 13°313.810.78.1
Aug27° / 14°303.911.27.6
Sep29° / 16°618.111.96.0
Oct30° / 18°10412.112.54.9
Nov30° / 19°1481513.14.5
Dec30° / 20°19019.913.43.8

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 18% of December, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23664
33565
43565
53466
63367
73367
83466
93466
103466
113565
123664
133763
143664
153862
163862
173961
183961
193961
203961
213961
223961
233961
243763
253763
263565
273565
283466
293367
303268
313169

Chance of precipitation in December

Any precipitation

Piracicaba gets around 190 mm of rain over 19.9 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 64% and peaks near 67% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
156
257
358
459
560
661
762
863
963
1064
1164
1265
1365
1466
1566
1666
1766
1866
1966
2066
2166
2266
2366
2466
2566
2666
2766
2867
2967
3067
3167

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 72% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111129509
211028529
3110285110
419275211
519265311
618265312
718255313
817255413
917255314
1017245414
1116245415
1216235515
1316235416
1416225516
1515225517
1605225518
1705225518
1805215519
1904215619
2004215520
2104215520
2203205720
2303205621
2403195721
2502195722
2602185822
2702185723
2802175823
2902175724
3001175824
3101165825

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
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 18 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 6 minutes over December. Sunrise moves from 6:22 AM to 6:32 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)
113.36:227:39
213.36:227:40
313.36:227:40
413.36:227:41
513.36:227:42
613.36:227:42
713.36:227:43
813.36:237:44
913.46:237:44
1013.46:237:45
1113.46:237:45
1213.46:247:46
1313.46:247:47
1413.46:247:47
1513.46:257:48
1613.46:257:48
1713.46:267:49
1813.46:267:49
1913.46:267:50
2013.46:277:50
2113.46:277:51
2213.46:287:51
2313.46:287:52
2413.46:297:52
2513.46:297:53
2613.46:307:53
2713.46:307:54
2813.46:317:54
2913.46:317:54
3013.46:327:55
3113.46:327:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6 kWh/m².

For context, solar energy here swings from a low near 3.59 kWh/m² to a high of 6.02 kWh/m² in November across the year — December's 6 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Intense
56.0Bright
66.0Bright
76.0Bright
86.0Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
156.0Bright
166.0Bright
176.0Bright
186.0Bright
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Bright
256.0Bright
266.0Bright
276.0Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Hazard calendar for Piracicaba

In seasonPeak

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

Piracicaba'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 Piracicaba?

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

3.8
Sightseeing
10th-best month of the year
5.3
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Piracicaba.

What to pack for Piracicaba in December

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

In December, Piracicaba sees daytime highs around 30°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Piracicaba 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 Piracicaba peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Piracicaba 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 Piracicaba is worst in September — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Piracicaba's WHO annual average of 13 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1121 µg/m³Dec 129 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug20Moderate
Sep21Moderate
Oct15Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Piracicaba?

Piracicaba sits at 22.7°S, 47.6°W, 530 m above sea level, in Brazil. The nearest listed city is Rio das Pedras, 14 km away.

Topography around Piracicaba

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

Within 3 km, the terrain around Piracicaba has only modest variations in elevation — a maximum elevation change of 129 m around an average of 525 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 296 m; within 80 km, large variations in elevation — a maximum elevation change of 634 m.

The land around Piracicaba is covered by artificial surfaces (73%) and trees (20%) within 3 km, cropland (45%) and trees (24%) within 16 km, and cropland (39%), trees (31%) and grassland (23%) within 80 km.

3 km
129 m
16 km
296 m
80 km
634 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Rio das Pedras 14 km · Iracemápolis 21 km · Santa Bárbara d'Oeste 24 km · Charqueada 27 km · Limeira 31 km · Santa Gertrudes 32 km · Americana 33 km · Capivari 33 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 Piracicaba (-22.7253°, -47.6492°, elevation 530 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).