Live Weather & Forecast
Weather in São Marcos
Rio Grande do Sul, Brazil · Real-time conditions & 3-day outlook
21°C
Feels like 21°C
70°F / Feels 70°F
Light rain
São Marcos, Rio Grande do Sul
🌞 Daytime
Updated: 2026-04-21 15:00
Humidity
83%
Wind
3.6 km/h N
Wind Gust
5.5 km/h
Pressure
1019 mb
Visibility
10 km
UV Index
1.6
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
13.8°C
Wind Degree
355°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
193.9 μg/m³
NO₂
8.1 μg/m³
O₃
42 μg/m³
SO₂
1.7 μg/m³
PM 2.5
5.1 μg/m³
PM 10
5.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for São Marcos, Rio Grande do Sul
12 AM
17°
Clear
1 AM
17°
Clear
2 AM
17°
Clear
3 AM
17°
Partly Cloudy
4 AM
17°
Partly Cloudy
5 AM
16°
Partly Cloudy
6 AM
16°
Partly Cloudy
7 AM
15°
Partly Cloudy
8 AM
17°
Partly Cloudy
9 AM
17°
Sunny
10 AM
18°
Sunny
11 AM
23°
Sunny
12 PM
20°
Patchy rain nearby
1 PM
21°
Patchy rain nearby
2 PM
19°
Patchy rain nearby
3 PM
21°
Light rain
4 PM
21°
Patchy rain nearby
5 PM
20°
Patchy light drizzle
6 PM
19°
Patchy rain nearby
7 PM
19°
Cloudy
8 PM
19°
Partly Cloudy
9 PM
19°
Patchy rain nearby
10 PM
18°
Clear
11 PM
17°
Partly Cloudy
3-Day Forecast
Daily overview for São Marcos, Rio Grande do Sul
Today
Patchy rain nearby
23°
/
15°
🌧️ 84% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 5 km/h
🌧️ Total precip: 0.3 mm
☀️ UV Index: 4.5
🌅 Sunrise: 06:47 AM
🌇 Sunset: 06:00 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Patchy rain nearby
28°
/
16°
🌧️ 78% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 6.5 km/h
🌧️ Total precip: 0.16 mm
☀️ UV Index: 7.3
🌅 Sunrise: 06:47 AM
🌇 Sunset: 05:59 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Heavy rain
18°
/
17°
🌧️ 89% chance of rain
💧 Avg. humidity: 98%
💨 Max wind: 2.5 km/h
🌧️ Total precip: 23.05 mm
☀️ UV Index: 6.5
🌅 Sunrise: 06:48 AM
🌇 Sunset: 05:58 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São Marcos
Plan your trip to São Marcos, Brazil around the most favorable weather conditions.
Peak Season
December – March
Southern hemisphere summer — warm and generally dry.
Shoulder Season
April – May, November
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Cooler winter months; indoor activities preferred.
Frequently Asked Questions
What is the current weather in São Marcos?
Current conditions in São Marcos: Light rain, temperature 21°C, humidity 83%.
What is the best time to visit São Marcos?
The best time to visit São Marcos is typically December – March. Southern hemisphere summer — warm and generally dry.
What is the climate like in São Marcos?
São Marcos is located at approximately -29° latitude. It experiences a temperate southern hemisphere climate.
Does it rain a lot in São Marcos?
The wettest period in São Marcos is typically during June – September. Cooler winter months; indoor activities preferred.
What should I pack for a trip to São Marcos?
For visits to São Marcos during December – March: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São Marcos in?
São Marcos is located in Brazil, in the state of Rio Grande do Sul.
What are the public holidays in São Marcos in 2026?
View the 2026 public holidays for São Marcos on our Holidays page.
What are the GPS coordinates used for the weather forecast in São Marcos?
The weather forecast for São Marcos uses coordinates -28.9707, -51.0688.
What is the current temperature outside in São Marcos?
The current outdoor temperature in São Marcos is 21°C (70°F) with light rain.
What is the hourly weather forecast for São Marcos today?
Today's hour-by-hour weather breakdown for São Marcos is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in São Marcos tomorrow hour by hour?
Tomorrow's forecast for São Marcos shows a high of 28°C and a low of 16°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in São Marcos?
There is a 84% chance of rain in São Marcos today. Check the hourly forecast above for a time-by-time breakdown of when rain is most likely.
Is it going to rain today in São Marcos?
Yes, there is a 84% chance of rain in São Marcos today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.