Live Weather & Forecast
Weather in São Sebastião do Alto
Rio de Janeiro, Brazil · Real-time conditions & 3-day outlook
23°C
Feels like 25°C
74°F / Feels 77°F
Sunny
São Sebastião do Alto, Rio de Janeiro
🌞 Daytime
Updated: 2026-04-21 11:15
Humidity
57%
Wind
4 km/h NW
Wind Gust
4.6 km/h
Pressure
1018 mb
Visibility
10 km
UV Index
8.6
(Very High)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
14.4°C
Wind Degree
317°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
108.9 μg/m³
NO₂
1.3 μg/m³
O₃
98 μg/m³
SO₂
2.6 μg/m³
PM 2.5
6.8 μg/m³
PM 10
7.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for São Sebastião do Alto, Rio de Janeiro
12 AM
16°
Clear
1 AM
16°
Partly Cloudy
2 AM
16°
Clear
3 AM
16°
Clear
4 AM
15°
Clear
5 AM
14°
Clear
6 AM
14°
Clear
7 AM
15°
Sunny
8 AM
18°
Sunny
9 AM
20°
Sunny
10 AM
22°
Sunny
11 AM
23°
Sunny
12 PM
24°
Sunny
1 PM
24°
Sunny
2 PM
24°
Sunny
3 PM
24°
Sunny
4 PM
23°
Patchy rain nearby
5 PM
21°
Patchy rain nearby
6 PM
19°
Partly Cloudy
7 PM
18°
Clear
8 PM
17°
Clear
9 PM
17°
Mist
10 PM
16°
Mist
11 PM
16°
Mist
3-Day Forecast
Daily overview for São Sebastião do Alto, Rio de Janeiro
Today
Sunny
24°
/
14°
🌧️ 0% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 6.8 km/h
🌧️ Total precip: 0.03 mm
☀️ UV Index: 9.2
🌅 Sunrise: 06:04 AM
🌇 Sunset: 05:32 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Sunny
25°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 82%
💨 Max wind: 6.5 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 9.2
🌅 Sunrise: 06:04 AM
🌇 Sunset: 05:31 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Sunny
25°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 82%
💨 Max wind: 6.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 9.5
🌅 Sunrise: 06:05 AM
🌇 Sunset: 05:31 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São Sebastião do Alto
Plan your trip to São Sebastião do Alto, Brazil around the most favorable weather conditions.
Peak Season
November – April
Dry season — low humidity, clear skies, comfortable temperatures.
Shoulder Season
May, October
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Wet/monsoon season; heavier rainfall possible.
Frequently Asked Questions
What is the current weather in São Sebastião do Alto?
Current conditions in São Sebastião do Alto: Sunny, temperature 23°C, humidity 57%.
What is the best time to visit São Sebastião do Alto?
The best time to visit São Sebastião do Alto is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in São Sebastião do Alto?
São Sebastião do Alto is located at approximately -22° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in São Sebastião do Alto?
The wettest period in São Sebastião do Alto is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to São Sebastião do Alto?
For visits to São Sebastião do Alto during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São Sebastião do Alto in?
São Sebastião do Alto is located in Brazil, in the state of Rio de Janeiro.
What are the public holidays in São Sebastião do Alto in 2026?
View the 2026 public holidays for São Sebastião do Alto on our Holidays page.
What are the GPS coordinates used for the weather forecast in São Sebastião do Alto?
The weather forecast for São Sebastião do Alto uses coordinates -21.9555, -42.1347.
What is the current temperature outside in São Sebastião do Alto?
The current outdoor temperature in São Sebastião do Alto is 23°C (73°F) with sunny.
What is the hourly weather forecast for São Sebastião do Alto today?
Today's hour-by-hour weather breakdown for São Sebastião do Alto 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 Sebastião do Alto tomorrow hour by hour?
Tomorrow's forecast for São Sebastião do Alto shows a high of 25°C and a low of 15°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in São Sebastião do Alto?
Rain is not expected in São Sebastião do Alto today. Current forecast shows no significant rain probability.
Is it going to rain today in São Sebastião do Alto?
No, rain is not forecast for São Sebastião do Alto today. Current conditions show clear to partly cloudy skies.