Live Weather & Forecast
Weather in São João da Fronteira
Piauí, Brazil · Real-time conditions & 3-day outlook
20°C
Feels like 20°C
68°F / Feels 68°F
Mist
São João da Fronteira, Piauí
🌙 Nighttime
Updated: 2026-04-21 20:15
Humidity
96%
Wind
4 km/h ESE
Wind Gust
7.8 km/h
Pressure
1013 mb
Visibility
2 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
55%
Dew Point
19.5°C
Wind Degree
116°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
144.9 μg/m³
NO₂
8.6 μg/m³
O₃
16 μg/m³
SO₂
1.6 μg/m³
PM 2.5
5 μg/m³
PM 10
5.1 μg/m³
Today's Hourly Forecast
24-hour breakdown for São João da Fronteira, Piauí
12 AM
20°
Light rain shower
1 AM
20°
Light rain shower
2 AM
20°
Light rain shower
3 AM
20°
Fog
4 AM
20°
Mist
5 AM
20°
Mist
6 AM
20°
Mist
7 AM
21°
Mist
8 AM
22°
Partly Cloudy
9 AM
24°
Partly Cloudy
10 AM
25°
Patchy rain nearby
11 AM
26°
Light rain shower
12 PM
26°
Light rain shower
1 PM
25°
Patchy rain nearby
2 PM
25°
Light rain shower
3 PM
24°
Light rain shower
4 PM
23°
Light rain shower
5 PM
22°
Light rain shower
6 PM
21°
Patchy rain nearby
7 PM
21°
Mist
8 PM
20°
Mist
9 PM
20°
Mist
10 PM
20°
Mist
11 PM
20°
Mist
3-Day Forecast
Daily overview for São João da Fronteira, Piauí
Today
Moderate rain
26°
/
20°
🌧️ 99% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 7.9 km/h
🌧️ Total precip: 10.98 mm
☀️ UV Index: 11.9
🌅 Sunrise: 05:43 AM
🌇 Sunset: 05:43 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Moderate rain
26°
/
19°
🌧️ 89% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 9 km/h
🌧️ Total precip: 10.32 mm
☀️ UV Index: 12.6
🌅 Sunrise: 05:43 AM
🌇 Sunset: 05:43 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Patchy rain nearby
27°
/
20°
🌧️ 88% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 11.5 km/h
🌧️ Total precip: 1.9 mm
☀️ UV Index: 12.8
🌅 Sunrise: 05:42 AM
🌇 Sunset: 05:43 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São João da Fronteira
Plan your trip to São João da Fronteira, 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 João da Fronteira?
Current conditions in São João da Fronteira: Mist, temperature 20°C, humidity 96%.
What is the best time to visit São João da Fronteira?
The best time to visit São João da Fronteira is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in São João da Fronteira?
São João da Fronteira is located at approximately -3.9° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in São João da Fronteira?
The wettest period in São João da Fronteira is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to São João da Fronteira?
For visits to São João da Fronteira during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São João da Fronteira in?
What are the public holidays in São João da Fronteira in 2026?
View the 2026 public holidays for São João da Fronteira on our Holidays page.
What are the GPS coordinates used for the weather forecast in São João da Fronteira?
The weather forecast for São João da Fronteira uses coordinates -3.939, -41.2592.
What is the current temperature outside in São João da Fronteira?
The current outdoor temperature in São João da Fronteira is 20°C (68°F) with mist.
What is the hourly weather forecast for São João da Fronteira today?
Today's hour-by-hour weather breakdown for São João da Fronteira 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 João da Fronteira tomorrow hour by hour?
Tomorrow's forecast for São João da Fronteira shows a high of 26°C and a low of 19°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in São João da Fronteira?
There is a 99% chance of rain in São João da Fronteira 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 João da Fronteira?
Yes, there is a 99% chance of rain in São João da Fronteira today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.