Tatuí weather in December

In December, Tatuí sees average daytime highs of 29°C and overnight lows near 20°C, with 192 mm of rain across 19.3 wet days and about 13.4 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°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 Tatuí's 11th-clearest and 5th-windiest month. For the whole year in context, see Tatuí's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
192 mm
19.3 wet days
Daylight
13 h 24 min
6:25 AM – 7:50 PM
Cloud cover
69%
11th clearest
Wind
10 km/h
5th windiest
Solar energy
5.97 kWh/m²
Travel score
4.2
out of 10

Tatuí is human settlement in Brazil.

Air quality
Good
PM10 20.3 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 29°C through the month.

A typical December day in Tatuí reaches about 29°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 25°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)
12919
22919
32919
42919
52919
62919
72919
82919
92919
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
212920
222920
232920
242920
253020
263020
273020
282920
292920
302920
312920

Tatuí weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°25822.213.33.8
Feb30° / 20°17318.312.83.9
Mar29° / 20°13016.512.24.7
Apr28° / 18°597.811.56.5
May25° / 15°626.510.97.5
Jun24° / 13°495.310.68.0
Jul24° / 13°424.610.78.1
Aug26° / 14°394.511.27.9
Sep27° / 16°828.611.96.7
Oct28° / 17°11412.612.55.5
Nov29° / 18°14514.613.14.9
Dec29° / 20°19219.313.44.2

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
23565
33367
43367
53268
63268
73268
83169
93169
103268
113169
123367
133367
143367
153367
163565
173664
183664
193664
203763
213862
223862
233862
243763
253763
263664
273565
283565
293466
303367
313268

Chance of precipitation in December

Any precipitation

Tatuí gets around 192 mm of rain over 19.3 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 62% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
153
254
355
456
557
658
759
860
960
1061
1162
1262
1363
1463
1564
1664
1765
1865
1965
2065
2165
2265
2364
2465
2565
2665
2765
2865
2965
3066
3166

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 68% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111430486
211330497
311229517
411229508
511128519
611028529
7110285110
819275310
919275211
1018275311
1118275212
1217275312
1317265412
1407265413
1506265414
1606265414
1706255415
1805255515
1905255416
2005245516
2104245517
2204235518
2304225618
2403225619
2503215719
2603205720
2703205621
2803195622
2902195722
3002185723
3102185624

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 6:21 AM to 6:32 AM, and sunset from 7:41 PM to 7:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:217:41
213.36:217:42
313.46:217:43
413.46:217:43
513.46:227:44
613.46:227:44
713.46:227:45
813.46:227:46
913.46:227:46
1013.46:237:47
1113.46:237:48
1213.46:237:48
1313.46:247:49
1413.46:247:49
1513.46:247:50
1613.46:257:50
1713.46:257:51
1813.46:257:52
1913.46:267:52
2013.46:267:53
2113.46:277:53
2213.46:277:54
2313.46:287:54
2413.46:287:54
2513.46:297:55
2613.46:297:55
2713.46:307:56
2813.46:307:56
2913.46:317:56
3013.46:317:57
3113.46:327:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.97 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.48 kWh/m² to a high of 5.97 kWh/m² in December across the year — December's 5.97 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Bright
56.0Bright
66.0Bright
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 Tatuí

In seasonPeak

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

Tatuí's rainy season runs November–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 Tatuí?

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

4.2
Sightseeing
10th-best month of the year
5.4
Beach & pool
10th-best month of the year

December is a reasonable time to visit Tatuí for sightseeing.

What to pack for Tatuí in December

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

In December, Tatuí sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Tatuí 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 Tatuí 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
Nov13Extreme
Dec14Extreme

Air quality in Tatuí 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 Tatuí is worst in September — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodSep 922 µg/m³Nov 2312 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar13Moderate
Apr14Moderate
May17Moderate
Jun20Moderate
Jul21Moderate
Aug22Moderate
Sep22Moderate
Oct17Moderate
Nov12Good
Dec12Good
Location & terrain

Where is Tatuí?

Tatuí sits at 23.4°S, 47.9°W, 642 m above sea level, in Brazil. The nearest listed city is Iperó, 17 km away.

Topography around Tatuí

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

Within 3 km, the terrain around Tatuí has only modest variations in elevation — a maximum elevation change of 131 m around an average of 597 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, large variations in elevation — a maximum elevation change of 893 m.

The land around Tatuí is covered by artificial surfaces (45%) and trees (21%) within 3 km, cropland (45%), trees (25%) and grassland (24%) within 16 km, and trees (43%), cropland (27%) and grassland (26%) within 80 km.

3 km
131 m
16 km
240 m
80 km
893 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Iperó 17 km · Cesário Lange 17 km · Capela do Alto 18 km · Boituva 21 km · Cerquilho 24 km · Araçoiaba da Serra 30 km · Tietê 32 km · Itapetininga 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 Tatuí (-23.3556°, -47.8569°, elevation 642 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).