Live Weather & Forecast
Weather in União da Serra
Rio Grande do Sul, Brazil · Real-time conditions & 3-day outlook
25°C
Feels like 27°C
77°F / Feels 80°F
Overcast
União da Serra, Rio Grande do Sul
🌞 Daytime
Updated: 2026-04-21 15:15
Humidity
94%
Wind
3.6 km/h ESE
Wind Gust
10.8 km/h
Pressure
1011 mb
Visibility
10 km
UV Index
3.6
(Moderate)
Precipitation
0.18 mm
Cloud Cover
50%
Dew Point
23.1°C
Wind Degree
110°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
202.9 μg/m³
NO₂
5.8 μg/m³
O₃
28 μg/m³
SO₂
1.1 μg/m³
PM 2.5
6.2 μg/m³
PM 10
6.2 μg/m³
Today's Hourly Forecast
24-hour breakdown for União da Serra, Rio Grande do Sul
12 AM
21°
Fog
1 AM
21°
Fog
2 AM
21°
Fog
3 AM
21°
Fog
4 AM
21°
Partly Cloudy
5 AM
21°
Fog
6 AM
21°
Fog
7 AM
22°
Mist
8 AM
23°
Partly Cloudy
9 AM
24°
Partly Cloudy
10 AM
26°
Sunny
11 AM
26°
Patchy rain nearby
12 PM
27°
Patchy rain nearby
1 PM
28°
Sunny
2 PM
28°
Patchy light rain in area with thunder
3 PM
25°
Overcast
4 PM
27°
Patchy rain nearby
5 PM
26°
Sunny
6 PM
24°
Clear
7 PM
23°
Patchy rain nearby
8 PM
23°
Patchy rain nearby
9 PM
23°
Patchy rain nearby
10 PM
22°
Mist
11 PM
22°
Mist
3-Day Forecast
Daily overview for União da Serra, Rio Grande do Sul
Today
Moderate rain
28°
/
21°
🌧️ 88% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 4 km/h
🌧️ Total precip: 6.5 mm
☀️ UV Index: 9.5
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:38 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Patchy rain nearby
30°
/
21°
🌧️ 87% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 7.6 km/h
🌧️ Total precip: 1.72 mm
☀️ UV Index: 12.1
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:38 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Patchy rain nearby
30°
/
21°
🌧️ 81% chance of rain
💧 Avg. humidity: 87%
💨 Max wind: 6.8 km/h
🌧️ Total precip: 2.91 mm
☀️ UV Index: 11.9
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:37 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit União da Serra
Plan your trip to União da Serra, 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 União da Serra?
Current conditions in União da Serra: Overcast, temperature 25°C, humidity 94%.
What is the best time to visit União da Serra?
The best time to visit União da Serra is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in União da Serra?
União da Serra is located at approximately -10° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in União da Serra?
The wettest period in União da Serra is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to União da Serra?
For visits to União da Serra during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is União da Serra in?
União da Serra is located in Brazil, in the state of Rio Grande do Sul.
What are the public holidays in União da Serra in 2026?
View the 2026 public holidays for União da Serra on our Holidays page.
What are the GPS coordinates used for the weather forecast in União da Serra?
The weather forecast for União da Serra uses coordinates -10, -55.
What is the current temperature outside in União da Serra?
The current outdoor temperature in União da Serra is 25°C (77°F) with overcast.
What is the hourly weather forecast for União da Serra today?
Today's hour-by-hour weather breakdown for União da Serra 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 União da Serra tomorrow hour by hour?
Tomorrow's forecast for União da Serra shows a high of 30°C and a low of 21°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in União da Serra?
There is a 88% chance of rain in União da Serra 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 União da Serra?
Yes, there is a 88% chance of rain in União da Serra today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.