Live Weather & Forecast
Weather in São Martinho
Rio Grande do Sul, Brazil · Real-time conditions & 3-day outlook
21°C
Feels like 21°C
70°F / Feels 70°F
Fog
São Martinho, Rio Grande do Sul
🌙 Nighttime
Updated: 2026-04-23 04:15
Humidity
98%
Wind
5.4 km/h SE
Wind Gust
11 km/h
Pressure
1011 mb
Visibility
0 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
20.6°C
Wind Degree
135°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
138.9 μg/m³
NO₂
2 μg/m³
O₃
45 μg/m³
SO₂
1 μg/m³
PM 2.5
4.6 μg/m³
PM 10
4.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for São Martinho, Rio Grande do Sul
12 AM
22°
Mist
1 AM
22°
Mist
2 AM
22°
Fog
3 AM
21°
Fog
4 AM
21°
Fog
5 AM
21°
Fog
6 AM
21°
Fog
7 AM
22°
Mist
8 AM
24°
Sunny
9 AM
26°
Sunny
10 AM
28°
Sunny
11 AM
29°
Patchy rain nearby
12 PM
30°
Patchy rain nearby
1 PM
30°
Patchy rain nearby
2 PM
30°
Sunny
3 PM
28°
Patchy rain nearby
4 PM
28°
Sunny
5 PM
26°
Sunny
6 PM
25°
Clear
7 PM
24°
Clear
8 PM
23°
Clear
9 PM
23°
Partly Cloudy
10 PM
23°
Clear
11 PM
23°
Clear
3-Day Forecast
Daily overview for São Martinho, Rio Grande do Sul
Today
Patchy rain nearby
30°
/
21°
🌧️ 89% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 6.8 km/h
🌧️ Total precip: 0.45 mm
☀️ UV Index: 12.2
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:37 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Fri, Apr 24
Patchy rain nearby
28°
/
21°
🌧️ 89% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 6.1 km/h
🌧️ Total precip: 3.28 mm
☀️ UV Index: 11.8
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:37 PM
🌙 First Quarter
🌑 Moon: 49% lit
Sat, Apr 25
Patchy rain nearby
27°
/
20°
🌧️ 89% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 6.1 km/h
🌧️ Total precip: 1.62 mm
☀️ UV Index: 11.8
🌅 Sunrise: 05:49 AM
🌇 Sunset: 05:37 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Best Time to Visit São Martinho
Plan your trip to São Martinho, 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 Martinho?
Current conditions in São Martinho: Fog, temperature 21°C, humidity 98%.
What is the best time to visit São Martinho?
The best time to visit São Martinho is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in São Martinho?
São Martinho is located at approximately -10° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in São Martinho?
The wettest period in São Martinho is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to São Martinho?
For visits to São Martinho during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São Martinho in?
São Martinho is located in Brazil, in the state of Rio Grande do Sul.
What are the public holidays in São Martinho in 2026?
View the 2026 public holidays for São Martinho on our Holidays page.
What are the GPS coordinates used for the weather forecast in São Martinho?
The weather forecast for São Martinho uses coordinates -10, -55.
What is the current temperature outside in São Martinho?
The current outdoor temperature in São Martinho is 21°C (70°F) with fog.
What is the hourly weather forecast for São Martinho today?
Today's hour-by-hour weather breakdown for São Martinho 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 Martinho tomorrow hour by hour?
Tomorrow's forecast for São Martinho shows a high of 28°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 São Martinho?
There is a 89% chance of rain in São Martinho 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 Martinho?
Yes, there is a 89% chance of rain in São Martinho today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.