Serrana weather in December

In December, Serrana sees average daytime highs of 29°C and overnight lows near 20°C, with 230 mm of rain across 22.9 wet days and about 13.3 hours of daylight. It is the 5th-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 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 18 min by month's end. Set against the rest of the year, December is Serrana's 11th-clearest and 7th-windiest month. For the whole year in context, see Serrana's year-round climate.

Daytime high
29°
5th warmest
Overnight low
20°
11th coldest
Rainfall
230 mm
22.9 wet days
Daylight
13 h 18 min
6:28 AM – 7:45 PM
Cloud cover
73%
11th clearest
Wind
7 km/h
7th windiest
Solar energy
5.76 kWh/m²
Travel score
3.8
out of 10

Serrana is central town of Serrana Municipality, 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 29°C through the month.

A typical December day in Serrana reaches about 29°C in the afternoon and slips back to 20°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°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)
12920
22920
32920
42920
52920
62920
72920
82920
92920
102920
112920
122920
132920
142920
152920
162920
172920
182920
192920
202920
212920
222920
232920
242920
252920
262920
272920
282920
292920
302920
312920

Serrana 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
Jan29° / 20°26923.513.13.6
Feb29° / 20°18818.812.73.9
Mar29° / 20°16618.912.14.4
Apr28° / 18°689.311.56.0
May26° / 15°475.7117.5
Jun26° / 14°273.110.78.2
Jul26° / 14°192.410.88.3
Aug28° / 15°19311.37.5
Sep30° / 18°697.411.95.6
Oct30° / 19°11613.212.54.6
Nov29° / 20°17217.5134.3
Dec29° / 20°23022.913.33.8

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 17% of December, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33169
43169
53070
62971
72971
82971
92971
102971
113070
122971
132971
142971
153070
163070
173070
183070
193169
203169
213169
223169
233169
243070
252971
262971
272872
282773
292773
302575
312575

Chance of precipitation in December

Any precipitation

Serrana gets around 230 mm of rain over 22.9 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 73% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
267
368
469
570
671
772
872
972
1073
1173
1273
1373
1473
1573
1673
1773
1873
1973
2073
2174
2274
2375
2475
2576
2676
2776
2877
2977
3077
3177

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 83% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11722655
20621685
30620695
40519706
50518716
60417736
70416746
80416737
90315757
100315757
110314767
120214786
130214786
140214777
150114787
160114787
170114787
180114787
190114787
200114778
210114778
220114778
230013789
240013789
2500137710
2600127810
2700127810
2800127711
2900117811
3000117811
3100117712

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
147calm
157calm
167calm
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 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 6:24 AM to 6:35 AM, and sunset from 7:36 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:247:36
213.26:247:37
313.26:247:37
413.26:257:38
513.26:257:39
613.26:257:39
713.26:257:40
813.26:257:40
913.36:267:41
1013.36:267:42
1113.36:267:42
1213.36:277:43
1313.36:277:43
1413.36:277:44
1513.36:287:45
1613.36:287:45
1713.36:287:46
1813.36:297:46
1913.36:297:47
2013.36:307:47
2113.36:307:48
2213.36:317:48
2313.36:317:49
2413.36:327:49
2513.36:327:49
2613.36:337:50
2713.36:337:50
2813.36:347:51
2913.36:347:51
3013.36:357:51
3113.36:357:52

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.76 kWh/m².

For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 5.99 kWh/m² in October across the year — December's 5.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.6Bright
Planning a trip in December

Hazard calendar for Serrana

In seasonPeak

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

Serrana'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 Serrana?

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

3.8
Sightseeing
11th-best month of the year
4.9
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Serrana.

What to pack for Serrana in December

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

In December, Serrana sees daytime highs around 29°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Serrana 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 Serrana peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 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 21UV 15Jun 22UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Serrana 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 Serrana is worst in September — around 43 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (November, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1540 µg/m³Nov 229 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May12Good
Jun11Good
Jul11Good
Aug20Moderate
Sep43Poor
Oct15Moderate
Nov8Good
Dec9Good
Location & terrain

Where is Serrana?

Serrana sits at 21.2°S, 47.6°W, 560 m above sea level, in Brazil. The nearest listed city is Cravinhos, 20 km away.

Topography around Serrana

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

Within 3 km, the terrain around Serrana has only modest variations in elevation — a maximum elevation change of 187 m around an average of 585 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 365 m; within 80 km, large variations in elevation — a maximum elevation change of 785 m.

The land around Serrana is covered by cropland (51%) and artificial surfaces (20%) within 3 km, cropland (59%) and trees (27%) within 16 km, and cropland (55%) and trees (31%) within 80 km.

3 km
187 m
16 km
365 m
80 km
785 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Cravinhos 20 km · Ribeirão Preto 23 km · Brodowski 25 km · Jardinópolis 28 km · Altinópolis 31 km · Cajuru 31 km · Batatais 36 km · Santa Rosa de Viterbo 38 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 Serrana (-21.2114°, -47.5956°, elevation 560 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).