Live Weather & Forecast
Weather in São João do Arraial
Piauí, Brazil · Real-time conditions & 3-day outlook
29°C
Feels like 33°C
84°F / Feels 91°F
Patchy rain nearby
São João do Arraial, Piauí
🌞 Daytime
Updated: 2026-04-21 16:30
Humidity
74%
Wind
3.6 km/h SSE
Wind Gust
10.8 km/h
Pressure
1009 mb
Visibility
9 km
UV Index
1
(Low)
Precipitation
0.18 mm
Cloud Cover
87%
Dew Point
23.6°C
Wind Degree
158°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
127.9 μg/m³
NO₂
5.6 μg/m³
O₃
32 μg/m³
SO₂
1.2 μg/m³
PM 2.5
5.2 μg/m³
PM 10
5.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for São João do Arraial, Piauí
12 AM
23°
Patchy rain nearby
1 AM
23°
Light rain shower
2 AM
23°
Fog
3 AM
23°
Fog
4 AM
23°
Fog
5 AM
22°
Fog
6 AM
23°
Fog
7 AM
23°
Fog
8 AM
24°
Mist
9 AM
25°
Partly Cloudy
10 AM
26°
Overcast
11 AM
27°
Partly Cloudy
12 PM
28°
Patchy rain nearby
1 PM
30°
Patchy rain nearby
2 PM
29°
Light rain shower
3 PM
29°
Light rain shower
4 PM
29°
Patchy rain nearby
5 PM
27°
Patchy rain nearby
6 PM
24°
Patchy rain nearby
7 PM
23°
Light rain shower
8 PM
23°
Light rain shower
9 PM
23°
Light rain shower
10 PM
23°
Light rain shower
11 PM
23°
Light rain shower
3-Day Forecast
Daily overview for São João do Arraial, Piauí
Today
Moderate rain
30°
/
22°
🌧️ 95% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 11.5 km/h
🌧️ Total precip: 10.64 mm
☀️ UV Index: 3.8
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:48 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Patchy rain nearby
28°
/
22°
🌧️ 84% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 11.2 km/h
🌧️ Total precip: 2.31 mm
☀️ UV Index: 11.7
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:48 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Patchy rain nearby
30°
/
22°
🌧️ 89% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 6.8 km/h
🌧️ Total precip: 4.48 mm
☀️ UV Index: 11
🌅 Sunrise: 05:48 AM
🌇 Sunset: 05:47 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São João do Arraial
Plan your trip to São João do Arraial, 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 do Arraial?
Current conditions in São João do Arraial: Patchy rain nearby, temperature 29°C, humidity 74%.
What is the best time to visit São João do Arraial?
The best time to visit São João do Arraial is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in São João do Arraial?
São João do Arraial is located at approximately -3.8° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in São João do Arraial?
The wettest period in São João do Arraial is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to São João do Arraial?
For visits to São João do Arraial during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São João do Arraial in?
What are the public holidays in São João do Arraial in 2026?
View the 2026 public holidays for São João do Arraial on our Holidays page.
What are the GPS coordinates used for the weather forecast in São João do Arraial?
The weather forecast for São João do Arraial uses coordinates -3.8127, -42.4508.
What is the current temperature outside in São João do Arraial?
The current outdoor temperature in São João do Arraial is 29°C (84°F) with patchy rain nearby.
What is the hourly weather forecast for São João do Arraial today?
Today's hour-by-hour weather breakdown for São João do Arraial 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 do Arraial tomorrow hour by hour?
Tomorrow's forecast for São João do Arraial shows a high of 28°C and a low of 22°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in São João do Arraial?
There is a 95% chance of rain in São João do Arraial 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 do Arraial?
Yes, there is a 95% chance of rain in São João do Arraial today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.