São Lourenço do Sul weather in December

In December, São Lourenço do Sul sees average daytime highs of 27°C and overnight lows near 19°C, with 104 mm of rain across 11.4 wet days and about 14 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 27°C by the end. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 54 min at the start of December to 14 hours by month's end. Set against the rest of the year, December is São Lourenço do Sul's 3rd-clearest and 4th-windiest month. For the whole year in context, see São Lourenço do Sul's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
9th coldest
Rainfall
104 mm
11.4 wet days
Daylight
14 hours
6:23 AM – 8:25 PM
Cloud cover
56%
3rd clearest
Wind
16 km/h
4th windiest
Solar energy
6.87 kWh/m²
Travel score
6.4
out of 10

São Lourenço do Sul 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 26°C in the first days to 27°C by the end.

A typical December day in São Lourenço do Sul reaches about 27°C in the afternoon and slips back to 19°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 30°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12618
22618
32618
42618
52618
62618
72618
82619
92619
102619
112619
122619
132619
142619
152719
162719
172719
182719
192720
202720
212720
222720
232720
242720
252720
262720
272720
282720
292720
302720
312720

São Lourenço do Sul weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°1101413.85.9
Feb27° / 21°11213.313.15.8
Mar26° / 20°10112.512.26.3
Apr24° / 17°1029.711.36.9
May20° / 14°101910.46.5
Jun18° / 11°1039.2105.9
Jul17° / 10°11910.110.25.6
Aug19° / 11°1169.910.96.1
Sep20° / 13°1391111.85.9
Oct22° / 15°13712.512.86.2
Nov24° / 17°989.913.66.9
Dec27° / 19°10411.4146.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55149
65149
75149
85149
95149
105248
115248
125248
135248
145149
155149
165248
175248
185248
195248
205149
215149
225149
235149
245149
255149
265050
275050
285149
295050
305149
315149

Chance of precipitation in December

Any precipitation

São Lourenço do Sul gets around 104 mm of rain over 11.4 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 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
233
333
434
534
634
735
835
935
1036
1136
1236
1337
1437
1537
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2638
2738
2838
2938
3038
3139

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11322322850
21322322850
31322322850
41322322860
51222322860
61221312970
71221312970
81220313080
91120303080
101119303190
111019303290
129192933100
139182934100
148182835110
158182735120
167172636140
177172537150
187162437160
196162337180
206152237190
216152237200
226152137220
235142037230
245142036240
255142036250
265141935261
275131935271
284132034281
294132034291
304132033301
314122133301

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 54 min at the start of December to 14 hours 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 8:14 PM to 8:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.96:218:14
213.96:218:15
313.96:218:16
413.96:218:17
513.96:218:18
614.06:218:18
714.06:218:19
814.06:218:20
914.06:218:20
1014.06:228:21
1114.06:228:22
1214.06:228:23
1314.06:228:23
1414.06:238:24
1514.06:238:24
1614.06:238:25
1714.06:238:26
1814.06:248:26
1914.06:248:27
2014.06:258:27
2114.06:258:28
2214.06:268:28
2314.06:268:29
2414.06:278:29
2514.06:278:30
2614.06:288:30
2714.06:288:30
2814.06:298:31
2914.06:298:31
3014.06:308:31
3114.06:318:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.87 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 6.87 kWh/m² in December across the year — December's 6.87 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
96.9Intense
106.9Intense
116.9Intense
126.9Intense
136.9Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.8Intense
316.8Intense
Planning a trip in December

Is December a good time to visit São Lourenço do Sul?

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

6.4
Sightseeing
4th-best month of the year
6.4
Beach & pool
1st-best month of the year

December is a reasonable time to visit São Lourenço do Sul for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Lourenço do Sul in December

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

In December, São Lourenço do Sul sees daytime highs around 27°C and nights near 19°C. Pack sun protection. Worth having: light clothes and rain gear. About 11 days see rain.

sun protectionlight clothesrain gear

Sea temperature near São Lourenço do Sul in December

The nearest coast averages about 24°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 26°C and coldest in July near 14°C.

It's comfortable for a long swim from Oct 31 to May 3 — about 6.1 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb26Warm
Mar25Warm
Apr22Refreshing
May19Cool
Jun16Cool
Jul14Bracing
Aug15Bracing
Sep16Cool
Oct19Cool
Nov21Refreshing
Dec24Refreshing

UV index in São Lourenço do Sul 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 São Lourenço do Sul peaks around December 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeDec 22UV 12Jun 19UV 3
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr7High
May4Moderate
Jun3Moderate
Jul4Moderate
Aug5Moderate
Sep7Very high
Oct8Very high
Nov11Extreme
Dec13Extreme
Location & terrain

Where is São Lourenço do Sul?

São Lourenço do Sul sits at 31.4°S, 52.0°W, 13 m above sea level, in Brazil. The nearest listed city is Pelotas, 57 km away.

Topography around São Lourenço do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Lourenço do Sul.

Within 3 km, the terrain around São Lourenço do Sul has only modest variations in elevation — a maximum elevation change of 30 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 199 m; within 80 km, significant variations in elevation — a maximum elevation change of 507 m.

The land around São Lourenço do Sul is covered by water (26%) and cropland (23%) within 3 km, water (38%) and cropland (31%) within 16 km, and water (35%) and trees (28%) within 80 km.

3 km
30 m
16 km
199 m
80 km
507 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Pelotas 57 km · Camaquã 59 km · Capão do Leão 65 km · Canguçu 66 km · São José do Norte 72 km · Rio Grande 75 km · Encruzilhada do Sul 105 km · Piratini 107 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 São Lourenço do Sul (-31.3653°, -51.9783°, 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).