Itajaí weather in January

In January, Itajaí sees average daytime highs of 27°C and overnight lows near 22°C, with 215 mm of rain across 21.8 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 1st-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 14% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 13 h 42 min at the start of January to 13 h 18 min by month's end. Set against the rest of the year, January is Itajaí's 8th-clearest and 4th-windiest month. For the whole year in context, see Itajaí's year-round climate.

Daytime high
27°
2nd warmest
Overnight low
22°
11th coldest
Rainfall
215 mm
21.8 wet days
Daylight
13 h 30 min
6:38 AM – 8:10 PM
Cloud cover
70%
8th clearest
Wind
10 km/h
4th windiest
Solar energy
5.46 kWh/m²
Travel score
4.7
out of 10

Itajaí is human settlement in Brazil.

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical January day in Itajaí reaches about 27°C in the afternoon and slips back to 22°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12722
22722
32722
42722
52722
62722
72722
82722
92722
102722
112722
122722
132722
142722
152722
162722
172722
182722
192722
202722
212722
222722
232722
242722
252722
262722
272722
282722
292722
302722
312722

Itajaí 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
Jan27° / 22°21521.813.54.7
Feb27° / 22°19419.5134.7
Mar26° / 21°14719.512.25.2
Apr25° / 19°9812.611.46.4
May22° / 16°11511.610.76.4
Jun20° / 14°1099.810.36.3
Jul19° / 13°9810.410.56.1
Aug20° / 14°989.9116.3
Sep21° / 16°15312.911.85.8
Oct22° / 17°14315.412.65.6
Nov24° / 19°14316.913.35.7
Dec26° / 21°15718.413.75.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 21% of January, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33466
43565
53565
63565
73664
83664
93763
103763
113763
123763
133763
143565
153565
163664
173565
183565
193466
203466
213367
223268
233268
243367
253367
263367
273367
283466
293466
303466
313664

Chance of precipitation in January

Any precipitation

Itajaí gets around 215 mm of rain over 21.8 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 69% and peaks near 72% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
165
265
366
466
566
667
767
868
968
1069
1169
1269
1369
1469
1570
1670
1770
1871
1971
2071
2172
2272
2372
2472
2572
2672
2771
2871
2971
3071
3171

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
131333474
231333474
331233484
431234484
531134494
631034494
731034504
83934504
93934504
103934504
113934504
123933514
133933514
143933514
1531033504
1631033504
1731133503
1821132523
1921132523
2021232504
2121231514
2221231514
2321230524
2421230515
2511229535
2611229535
2711228536
2811228536
2911127547
3011127547
3111126557

Wind in January

Winds average 10 km/h in January.

Across January, daily wind ranges from about 10 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
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 42 min at the start of January to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over January. Sunrise moves from 6:28 AM to 6:50 AM, and sunset from 8:08 PM to 8:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.76:288:08
213.76:288:08
313.76:298:08
413.66:308:09
513.66:308:09
613.66:318:09
713.66:328:09
813.66:328:09
913.66:338:09
1013.66:348:09
1113.66:358:10
1213.66:358:10
1313.66:368:10
1413.56:378:10
1513.56:388:10
1613.56:388:10
1713.56:398:10
1813.56:408:09
1913.56:418:09
2013.56:418:09
2113.46:428:09
2213.46:438:09
2313.46:448:09
2413.46:448:08
2513.46:458:08
2613.46:468:08
2713.36:478:08
2813.36:478:07
2913.36:488:07
3013.36:498:07
3113.36:508:06

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 2.55 kWh/m² to a high of 5.54 kWh/m² in December across the year — January's 5.46 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
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
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in January

Is January a good time to visit Itajaí?

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

4.7
Sightseeing
11th-best month of the year
4.8
Beach & pool
5th-best month of the year

January is a reasonable time to visit Itajaí for sightseeing.

What to pack for Itajaí in January

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

In January, Itajaí sees daytime highs around 27°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Itajaí in January

The nearest coast averages about 26°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 27°C and coldest in August near 18°C.

It's comfortable for a long swim from Sep 30 to Jun 16 — about 8.5 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar26Warm
Apr25Warm
May22Refreshing
Jun20Refreshing
Jul18Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in Itajaí in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Itajaí peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 13Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Itajaí?

Itajaí sits at 26.9°S, 48.7°W, 6 m above sea level, in Brazil. The nearest listed city is Navegantes, 1.0 km away.

Topography around Itajaí

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

Within 3 km, the terrain around Itajaí has significant variations in elevation — a maximum elevation change of 366 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 417 m; within 80 km, large variations in elevation — a maximum elevation change of 1,140 m.

The land around Itajaí is covered by artificial surfaces (54%) and water (21%) within 3 km, water (35%) and trees (30%) within 16 km, and trees (53%) and water (34%) within 80 km.

3 km
366 m
16 km
417 m
80 km
1,140 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Navegantes 1.0 km · Balneário Camboriú 10 km · Camboriú 13 km · Penha 15 km · Balneário Piçarras 16 km · Ilhota 16 km · Itapema 21 km · Gaspar 30 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 Itajaí (-26.9078°, -48.6619°, elevation 6 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).