Jarinu weather in January

In January, Jarinu sees average daytime highs of 28°C and overnight lows near 19°C, with 278 mm of rain across 23.4 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 13% of the time in January, and the air most often feels muggy.

Daylight stretches from about 13 h 24 min at the start of January to 13 h 06 min by month's end. Set against the rest of the year, January is Jarinu's 12th-clearest and 10th-windiest month. For the whole year in context, see Jarinu's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
19°
12th coldest
Rainfall
278 mm
23.4 wet days
Daylight
13 h 18 min
6:38 AM – 7:54 PM
Cloud cover
76%
12th clearest
Wind
9 km/h
10th windiest
Solar energy
5.46 kWh/m²
Travel score
4.3
out of 10

Jarinu is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← DecemberJarinu year-round climateFebruary →Best places to visit in January
JanFebMarAprMayJunJulAugSepOctNovDec

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical January day in Jarinu reaches about 28°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 24°C and 31°C. Set against its neighbours, January runs on par with December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12819
22819
32819
42819
52819
62819
72819
82819
92819
102819
112819
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282819
292819
302819
312819

Jarinu weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 1st-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32674
42674
52674
62575
72476
82575
92575
102575
112575
122575
132674
142674
152674
162674
172674
182674
192575
202575
212674
222674
232674
242674
252674
262872
272872
282971
293070
303070
313169

Chance of precipitation in January

Any precipitation

Jarinu gets around 278 mm of rain over 23.4 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 75% and peaks near 75% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
173
273
374
474
574
675
775
875
975
1075
1175
1275
1375
1475
1575
1675
1775
1875
1975
2075
2175
2275
2375
2475
2575
2675
2775
2875
2975
3074
3174

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the muggy band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1328672
2227692
3227692
4226702
5226702
6225712
7225712
8225712
9225712
10224722
11224722
12224722
13225712
14225712
15225712
16225712
17225712
18225712
19225712
20225712
21225712
22224722
23224722
24224722
25223732
26223732
27223732
28322732
29322732
30321742
31321733

Wind in January

Winds average 9 km/h in January.

Across January, daily wind ranges from about 9 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
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 24 min at the start of January to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over January. Sunrise moves from 6:28 AM to 6:48 AM, and sunset from 7:52 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:287:52
213.46:297:52
313.46:297:53
413.46:307:53
513.46:317:53
613.46:317:53
713.46:327:54
813.46:337:54
913.36:337:54
1013.36:347:54
1113.36:357:54
1213.36:357:54
1313.36:367:54
1413.36:377:54
1513.36:377:54
1613.36:387:54
1713.36:397:55
1813.36:397:54
1913.26:407:54
2013.26:417:54
2113.26:417:54
2213.26:427:54
2313.26:437:54
2413.26:437:54
2513.26:447:54
2613.16:457:54
2713.16:457:53
2813.16:467:53
2913.16:477:53
3013.16:487:53
3113.16:487:52

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.46 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 — January's 5.46 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in January

Hazard calendar for Jarinu

In seasonPeak

In January, 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 January a good time to visit Jarinu?

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

4.3
Sightseeing
11th-best month of the year
4.7
Beach & pool
12th-best month of the year

January is a reasonable time to visit Jarinu for sightseeing.

What to pack for Jarinu in January

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

In January, Jarinu sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Jarinu in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
← DecemberJarinu year-round climateFebruary →Best places to visit in January
January 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).