Morretes weather in December

In December, Morretes sees average daytime highs of 27°C and overnight lows near 20°C, with 251 mm of rain across 22.5 wet days and about 13.6 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 8% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 30 min at the start of December to 13 h 36 min by month's end. Set against the rest of the year, December is Morretes's 9th-clearest and 3rd-windiest month. For the whole year in context, see Morretes's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
20°
9th coldest
Rainfall
251 mm
22.5 wet days
Daylight
13 h 36 min
6:24 AM – 7:59 PM
Cloud cover
78%
9th clearest
Wind
6 km/h
3rd windiest
Solar energy
5.27 kWh/m²
Travel score
4.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 28°C by the end.

A typical December day in Morretes reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°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 about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72620
82720
92720
102720
112720
122720
132720
142720
152720
162720
172720
182720
192720
202820
212820
222820
232821
242821
252821
262821
272821
282821
292821
302821
312821

Morretes weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°32426.413.43.9
Feb28° / 21°3072312.93.8
Mar27° / 20°23223.712.24.4
Apr25° / 18°13016.411.45.6
May23° / 16°12113.710.86.1
Jun22° / 14°10011.110.46.3
Jul21° / 13°10011.610.66.2
Aug22° / 14°8611.211.16.4
Sep22° / 15°15916.811.85.4
Oct24° / 17°17820.412.64.9
Nov25° / 18°1882113.24.8
Dec27° / 20°25122.513.64.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
32080
42080
52080
62080
72080
82080
92080
102080
112080
122080
132179
142179
152179
162179
172179
182179
192278
202278
212377
222377
232377
242278
252278
262278
272179
282080
292080
302080
312080

Chance of precipitation in December

Any precipitation

Morretes gets around 251 mm of rain over 22.5 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 74% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
170
271
371
471
571
671
772
872
972
1073
1173
1273
1373
1474
1574
1674
1774
1874
1974
2074
2174
2274
2374
2475
2575
2676
2776
2877
2977
3078
3179

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
18274717
28264718
37264719
47264720
57254721
66254722
76244723
86244724
95234725
105234726
115224726
125214727
134204728
144204629
154194631
164184632
174184633
184174534
194174535
204164436
213164337
223154338
233154240
243144241
252144143
262134044
272134045
282133946
292123947
302123848
312113849

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 30 min at the start of December to 13 h 36 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 6:21 AM to 6:31 AM, and sunset from 7:49 PM to 8:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.56:217:49
213.56:217:50
313.56:217:51
413.56:217:51
513.56:217:52
613.56:217:53
713.56:227:53
813.56:227:54
913.56:227:55
1013.66:227:55
1113.66:237:56
1213.66:237:57
1313.66:237:57
1413.66:237:58
1513.66:247:58
1613.66:247:59
1713.66:247:59
1813.66:258:00
1913.66:258:01
2013.66:268:01
2113.66:268:02
2213.66:278:02
2313.66:278:02
2413.66:288:03
2513.66:288:03
2613.66:298:04
2713.66:298:04
2813.66:308:05
2913.66:308:05
3013.66:318:05
3113.66:318:06

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.27 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 5.27 kWh/m² in December across the year — December's 5.27 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in December

Hazard calendar for Morretes

In seasonPeak

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

Morretes's rainy season runs September–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 Morretes?

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

4.4
Sightseeing
9th-best month of the year
4.5
Beach & pool
3rd-best month of the year

December is a reasonable time to visit Morretes for sightseeing.

What to pack for Morretes in December

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

In December, Morretes sees daytime highs around 27°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

Sea temperature near Morretes 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 at the nearest coast (about 49 km away) is warmest in February at about 27°C and coldest in August near 19°C.

It's comfortable for a long swim from Sep 18 to Jun 29 — about 9.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr25Warm
May23Refreshing
Jun21Refreshing
Jul19Cool
Aug19Cool
Sep20Cool
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Morretes 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 Morretes peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 20UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug7High
Sep7Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Morretes?

Morretes sits at 25.5°S, 48.8°W, 13 m above sea level, in Brazil. The nearest listed city is Antonina, 13 km away.

Topography around Morretes

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

Within 3 km, the terrain around Morretes has only modest variations in elevation — a maximum elevation change of 180 m around an average of 24 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,546 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,808 m.

The land around Morretes is covered by trees (82%) within 3 km, trees (90%) within 16 km, and trees (71%) within 80 km.

3 km
180 m
16 km
1,546 m
80 km
1,808 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Antonina 13 km · Piraquara 24 km · Quatro Barras 27 km · Campina Grande do Sul 29 km · Paranaguá 31 km · Pinhais 36 km · São José dos Pinhais 38 km · Pontal do Paraná 39 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 Morretes (-25.4769°, -48.8344°, elevation 13 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).