São Lourenço do Sul in Summer
In summer (December, January and February), São Lourenço do Sul sees average daytime highs around 27°C and overnight lows near 20°C, with 326 mm of rain over about 39 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across summer, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels muggy.
Summer is São Lourenço do Sul's 3rd-best season to visit on our travel score. For the whole year in context, see São Lourenço do Sul's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 326 mm
- 39 wet days
- Avg wind
- 15 km/h
- Travel score
- 6.0
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in São Lourenço do Sul in Summer
Across summer, daytime highs hold fairly steady around 27°C.
A typical summer day in São Lourenço do Sul reaches about 27°C and drops to 20°C overnight. The warmest of the three months is January, the coolest December.
São Lourenço do Sul weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 21° | 110 | 14 | 13.8 | 5.9 |
| Feb | 27° / 21° | 112 | 13.3 | 13.1 | 5.8 |
| Mar | 26° / 20° | 101 | 12.5 | 12.2 | 6.3 |
| Apr | 24° / 17° | 102 | 9.7 | 11.3 | 6.9 |
| May | 20° / 14° | 101 | 9 | 10.4 | 6.5 |
| Jun | 18° / 11° | 103 | 9.2 | 10 | 5.9 |
| Jul | 17° / 10° | 119 | 10.1 | 10.2 | 5.6 |
| Aug | 19° / 11° | 116 | 9.9 | 10.9 | 6.1 |
| Sep | 20° / 13° | 139 | 11 | 11.8 | 5.9 |
| Oct | 22° / 15° | 137 | 12.5 | 12.8 | 6.2 |
| Nov | 24° / 17° | 98 | 9.9 | 13.6 | 6.9 |
| Dec | 27° / 19° | 104 | 11.4 | 14 | 6.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
São Lourenço do Sul gets around 326 mm of rain over 39 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 15 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 54 min in early December to 12 h 42 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.4 kWh/m².
Is summer a good time to visit São Lourenço do Sul?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer 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 Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, São Lourenço do Sul sees daytime highs around 27°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 39 days see rain.
Sea temperature near São Lourenço do Sul in Summer
The nearest coast averages about 25°C across summer — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 26 | 25 | 22 | 19 | 16 | 14 | 15 | 16 | 19 | 21 | 24 |
| Comfort | Warm | Warm | Warm | Refreshing | Cool | Cool | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 26 | Warm |
| Mar | 25 | Warm |
| Apr | 22 | Refreshing |
| May | 19 | Cool |
| Jun | 16 | Cool |
| Jul | 14 | Bracing |
| Aug | 15 | Bracing |
| Sep | 16 | Cool |
| Oct | 19 | Cool |
| Nov | 21 | Refreshing |
| Dec | 24 | Refreshing |
UV index in São Lourenço do Sul in Summer
Clear-sky midday UV across summer averages around 12 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 9 | 7 | 4 | 3 | 4 | 5 | 7 | 8 | 11 | 13 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 7 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 4 | Moderate |
| Aug | 5 | Moderate |
| Sep | 7 | Very high |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
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.
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
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.