Itajaí weather in December

In December, Itajaí sees average daytime highs of 26°C and overnight lows near 21°C, with 157 mm of rain across 18.4 wet days and about 13.7 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. 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 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is Itajaí's 9th-clearest and 2nd-windiest month. For the whole year in context, see Itajaí's year-round climate.

Daytime high
26°
4th warmest
Overnight low
21°
9th coldest
Rainfall
157 mm
18.4 wet days
Daylight
13 h 42 min
6:20 AM – 8:01 PM
Cloud cover
71%
9th clearest
Wind
11 km/h
2nd windiest
Solar energy
5.54 kWh/m²
Travel score
5.2
out of 10

Itajaí 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

Highs climb over the month, from about 25°C in the first days to 27°C by the end.

A typical December day in Itajaí reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12520
22520
32520
42520
52520
62520
72520
82620
92620
102620
112620
122620
132621
142621
152621
162621
172621
182621
192621
202621
212621
222721
232721
242721
252721
262721
272721
282721
292721
302722
312722

Itajaí weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 3rd-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 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 18% of December, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23664
33565
43565
53565
63466
73367
83367
93367
103367
113268
123268
133268
143169
153169
163169
173169
183169
193169
203169
213169
223268
233367
243367
253367
263268
273367
283268
293268
303367
313367

Chance of precipitation in December

Any precipitation

Itajaí gets around 157 mm of rain over 18.4 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 60% and peaks near 65% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
258
358
458
558
658
758
858
958
1058
1158
1259
1359
1459
1560
1660
1761
1861
1962
2062
2162
2262
2362
2462
2563
2663
2763
2864
2964
3064
3165

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11132842170
21122842170
31122742180
41112742190
51102742190
61102742200
7192642210
8192642220
9182542240
10182442250
11172342260
12172342270
13162242290
14162142300
15162041321
16161940331
17161840351
18151839361
19151738381
20151737391
21051737402
22051636412
23041636422
24041635432
25041535433
26041534443
27041534453
28031434453
29031434453
30031433464
31031433464

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 36 min at the start of December to 13 h 42 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 7:52 PM to 8:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:177:52
213.66:177:52
313.66:177:53
413.66:177:54
513.66:187:54
613.66:187:55
713.66:187:56
813.66:187:56
913.66:187:57
1013.76:187:58
1113.76:197:58
1213.76:197:59
1313.76:198:00
1413.76:208:00
1513.76:208:01
1613.76:208:01
1713.76:218:02
1813.76:218:02
1913.76:218:03
2013.76:228:03
2113.76:228:04
2213.76:238:04
2313.76:238:05
2413.76:248:05
2513.76:248:06
2613.76:258:06
2713.76:258:07
2813.76:268:07
2913.76:268:07
3013.76:278:08
3113.76:288:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.54 kWh/m² — the sunniest month for solar.

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 — December's 5.54 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
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
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in December

Is December a good time to visit Itajaí?

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

5.2
Sightseeing
9th-best month of the year
5.0
Beach & pool
3rd-best month of the year

December is a reasonable time to visit Itajaí for sightseeing.

What to pack for Itajaí in December

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

In December, Itajaí sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near Itajaí in December

The nearest coast averages about 25°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (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
December 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).