Jarinu weather in December

In December, Jarinu sees average daytime highs of 27°C and overnight lows near 19°C, with 224 mm of rain across 21.3 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 27°C through the month. The sky is clear or mostly clear about 15% 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 Jarinu's 11th-clearest and 5th-windiest month. For the whole year in context, see Jarinu's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
224 mm
21.3 wet days
Daylight
13 h 24 min
6:21 AM – 7:45 PM
Cloud cover
71%
11th clearest
Wind
10 km/h
5th windiest
Solar energy
5.78 kWh/m²
Travel score
4.7
out of 10

Jarinu 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 27°C through the month.

A typical December day in Jarinu reaches about 27°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°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)
12718
22718
32718
42718
52718
62718
72718
82718
92718
102718
112719
122719
132719
142719
152719
162719
172719
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282819
292819
302819
312819

Jarinu 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
Jan28° / 19°27823.413.34.3
Feb28° / 19°19419.512.84.3
Mar27° / 18°15918.412.25.2
Apr26° / 17°779.411.56.8
May24° / 14°717.510.97.4
Jun23° / 13°505.210.67.9
Jul23° / 12°494.510.78.0
Aug25° / 13°374.411.28.2
Sep26° / 15°948.911.97.0
Oct27° / 17°14114.112.55.9
Nov27° / 17°18116.713.15.4
Dec27° / 19°22421.313.44.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33466
43367
53268
63268
73169
83268
93268
103169
113268
123268
133268
143169
153268
163367
173367
183367
193367
203367
213367
223466
233466
243367
253268
263169
273169
282971
292971
302971
312872

Chance of precipitation in December

Any precipitation

Jarinu gets around 224 mm of rain over 21.3 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 69% and peaks near 73% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
161
262
362
463
564
665
765
866
967
1068
1168
1269
1370
1470
1571
1671
1771
1871
1971
2072
2172
2272
2372
2472
2572
2672
2772
2873
2973
3073
3173

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111540430
211440451
311339471
411238481
511237501
611136511
711136511
811035531
911034541
100934561
110934561
120833581
130833590
140733600
150733591
160633601
170634591
180634591
190634591
200534601
210533611
220533611
230433621
240432631
250432631
260331651
270331642
280330652
290330652
300329662
310329662

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
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
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 6:17 AM to 6:28 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)
113.36:177:36
213.36:177:37
313.36:177:38
413.36:177:38
513.46:187:39
613.46:187:39
713.46:187:40
813.46:187:41
913.46:187:41
1013.46:197:42
1113.46:197:43
1213.46:197:43
1313.46:207:44
1413.46:207:44
1513.46:207:45
1613.46:217:45
1713.46:217:46
1813.46:217:47
1913.46:227:47
2013.46:227:48
2113.46:237:48
2213.46:237:49
2313.46:247:49
2413.46:247:49
2513.46:257:50
2613.46:257:50
2713.46:267:51
2813.46:267:51
2913.46:277:51
3013.46:277:52
3113.46:287:52

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.78 kWh/m².

For context, solar energy here swings from a low near 3.6 kWh/m² to a high of 5.82 kWh/m² in November across the year — December's 5.78 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.6Bright
315.6Bright
Planning a trip in December

Hazard calendar for Jarinu

In seasonPeak

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

Jarinu'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 Jarinu?

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

December is a reasonable time to visit Jarinu for sightseeing.

What to pack for Jarinu in December

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

In December, Jarinu sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Jarinu 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 Jarinu peaks around January 21 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 21UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Jarinu 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 Jarinu is worst in June — around 71 µg/m³ PM2.5 (unhealthy), about 2.3× the cleanest month (December, 31 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJun 2370 µg/m³Dec 2031 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb34Moderate
Mar41Poor
Apr48Poor
May62Unhealthy
Jun71Unhealthy
Jul70Unhealthy
Aug60Unhealthy
Sep53Poor
Oct39Poor
Nov32Moderate
Dec31Moderate
Location & terrain

Where is Jarinu?

Jarinu sits at 23.1°S, 46.7°W, 793 m above sea level, in Brazil. The nearest listed city is Campo Limpo Paulista, 13 km away.

Topography around Jarinu

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

Within 3 km, the terrain around Jarinu has only modest variations in elevation — a maximum elevation change of 167 m around an average of 812 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 342 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,515 m.

The land around Jarinu is covered by trees (38%) and grassland (33%) within 3 km, trees (44%) and grassland (35%) within 16 km, and trees (45%) and grassland (28%) within 80 km.

3 km
167 m
16 km
342 m
80 km
1,515 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Campo Limpo Paulista 13 km · Itatiba 16 km · Várzea Paulista 16 km · Atibaia 18 km · Jundiaí 19 km · Francisco Morato 20 km · Louveira 23 km · Franco da Rocha 24 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 Jarinu (-23.1014°, -46.7283°, elevation 793 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).