Guaíba in Winter
In winter (June, July and August), Guaíba sees average daytime highs around 20°C and overnight lows near 11°C, with 373 mm of rain over about 29 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 20°C. The sky is clear or mostly clear about 32% of the time across winter, and the air most often feels dry.
Winter is Guaíba's 3rd-best season to visit on our travel score. For the whole year in context, see Guaíba's year-round climate.
- Avg daytime high
- 20°C
- coldest season of the year
- Avg overnight low
- 11°C
- Rainfall
- 373 mm
- 29 wet days
- Avg wind
- 10 km/h
- Travel score
- 6.3
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Guaíba in Winter
Across winter, daytime highs hold fairly steady around 20°C.
A typical winter day in Guaíba reaches about 20°C and drops to 11°C overnight. The warmest of the three months is August, the coolest July.
How winter really feels in Guaíba
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Guaíba weather by month
How the three winter months (June, July and August) 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 | 30° / 21° | 137 | 14.1 | 13.7 | 4.6 |
| Feb | 30° / 21° | 126 | 13.3 | 13.1 | 4.6 |
| Mar | 28° / 20° | 112 | 11.9 | 12.2 | 5.7 |
| Apr | 26° / 17° | 106 | 9.2 | 11.3 | 6.8 |
| May | 22° / 13° | 107 | 9.2 | 10.5 | 6.7 |
| Jun | 20° / 11° | 113 | 9.2 | 10.1 | 6.2 |
| Jul | 19° / 10° | 140 | 10 | 10.3 | 6.1 |
| Aug | 21° / 11° | 120 | 10.2 | 10.9 | 6.5 |
| Sep | 22° / 13° | 146 | 11.1 | 11.8 | 6.4 |
| Oct | 24° / 16° | 170 | 12.5 | 12.7 | 6.4 |
| Nov | 27° / 17° | 123 | 10.8 | 13.5 | 6.4 |
| Dec | 29° / 20° | 125 | 11.7 | 13.9 | 5.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 32% of the time across winter.
Chance of precipitation in Winter
Guaíba gets around 373 mm of rain over 29 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 12 min in early June to 11 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.8 kWh/m².
Is winter a good time to visit Guaíba?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Guaíba for sightseeing.
What to pack for Guaíba in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Guaíba sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 29 days see rain.
Sea temperature near Guaíba in Winter
The nearest coast averages about 16°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 35 km away) is warmest in February at about 26°C and coldest in July near 15°C.
It's comfortable for a long swim from Oct 23 to May 10 — about 6.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 25 | 23 | 19 | 17 | 15 | 16 | 17 | 20 | 22 | 24 |
| Comfort | Warm | Warm | Warm | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 25 | Warm |
| Apr | 23 | Refreshing |
| May | 19 | Cool |
| Jun | 17 | Cool |
| Jul | 15 | Cool |
| Aug | 16 | Cool |
| Sep | 17 | Cool |
| Oct | 20 | Cool |
| Nov | 22 | Refreshing |
| Dec | 24 | Warm |
UV index in Guaíba in Winter
Clear-sky midday UV across winter averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Guaíba peaks around January 15 at about 13 (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) | 13 | 12 | 10 | 7 | 4 | 3 | 4 | 5 | 8 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | Very high | Moderate | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 10 | Very high |
| Apr | 7 | Very high |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 4 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in Guaíba in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Guaíba is worst in August — around 27 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 13 | 15 | 18 | 21 | 23 | 25 | 27 | 23 | 16 | 15 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 15 | Moderate |
| Apr | 18 | Moderate |
| May | 21 | Moderate |
| Jun | 23 | Moderate |
| Jul | 25 | Moderate |
| Aug | 27 | Moderate |
| Sep | 23 | Moderate |
| Oct | 16 | Moderate |
| Nov | 15 | Moderate |
| Dec | 13 | Moderate |
Where is Guaíba?
Guaíba sits at 30.1°S, 51.3°W, 22 m above sea level, in Brazil. The nearest listed city is Porto Alegre, 13 km away.
Topography around Guaíba
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guaíba.
Within 3 km, the terrain around Guaíba has only modest variations in elevation — a maximum elevation change of 126 m around an average of 15 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 293 m; within 80 km, large variations in elevation — a maximum elevation change of 800 m.
The land around Guaíba is covered by artificial surfaces (33%), water (24%) and trees (21%) within 3 km, water (25%), trees (23%) and cropland (22%) within 16 km, and trees (41%) and grassland (20%) 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 Guaíba (-30.1139°, -51.325°, elevation 22 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.