Current Conditions

São João da Barra, Rio de Janeiro

75°F24°C
Light Rain

Wind

SSW 8 mph14 km/h

Humidity

66%

Cloud Cover

84%

As of Wednesday, September 2, 2026 at 12:47 PM GMT-3

Today's Outlook

Day

Overcast and warm, with a high of 75°F24°C. Breezy from the S at 8 to 10 mph13 to 15 km/h. 48% chance of light rain in the morning.

Night

Mostly cloudy, with a low around 69°F21°C. Breezy from the S at 7 to 9 mph12 to 14 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Light RainHigh 75°F24°CLow 69°F21°CPrecip 0.04 in0.9 mm48%Cloud 74%Wind S 8 mph13 km/hWednesday: Overcast and warm, with a high of 75°F24°C. Breezy from the S at 8 to 10 mph13 to 15 km/h. 48% chance of light rain in the morning. Wednesday Night: Mostly cloudy, with a low around 69°F21°C. Breezy from the S at 7 to 9 mph12 to 14 km/h.
ClearHigh 77°F25°CLow 63°F17°CPrecip 0 in0.1 mm4%Cloud 35%Wind ENE 7 mph11 km/hThursday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the NE at 7 to 11 mph12 to 19 km/h. Thursday Night: Mostly clear, with a low around 64°F18°C. Breezy from the ENE at 7 to 11 mph11 to 17 km/h.
ClearHigh 86°F30°CFeels 89°F31°CLow 63°F17°CPrecip 0 in0 mmCloud 1%Wind NNE 7 mph11 km/hFriday: Mostly clear and hot, with a high of 86°F30°C and morning low of 63°F17°C. Breezy from the N at 7 to 8 mph11 to 12 km/h. Friday Night: Mostly clear, with a low around 66°F19°C. Breezy from the NE at 7 to 9 mph12 to 15 km/h.
ShowersHigh 83°F28°CFeels 86°F30°CLow 70°F21°CPrecip 0.03 in0.8 mm35%Cloud 38%Wind S 6 mph9 km/hSaturday: Partly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the S at 6 to 8 mph10 to 13 km/h. Humid. Saturday Night: Partly cloudy, with a low around 70°F21°C. Breezy from the S at 6 to 8 mph9 to 12 km/h. 35% chance of showers in the evening.
Light RainHigh 74°F23°CLow 67°F20°CPrecip 0.41 in10.3 mm92%Cloud 97%Wind SSW 8 mph13 km/hSunday: Overcast and warm, with a high of 74°F23°C. Breezy from the SSW at 8 to 12 mph13 to 20 km/h. 92% chance of light rain throughout the day. Humid. Sunday Night: Overcast, with a low around 67°F20°C. Breezy from the SSW at 8 to 12 mph12 to 20 km/h. 83% chance of light rain throughout the night.
Light RainHigh 67°F20°CLow 64°F18°CPrecip 0.41 in10.3 mm96%Cloud 100%Wind S 8 mph12 km/hMonday: Overcast and mild, with a high of 67°F20°C. Breezy from the S at 8 mph13 km/h. 95% chance of light rain throughout the day. Monday Night: Overcast, with a low around 64°F18°C. Breezy from the S at 7 to 10 mph11 to 16 km/h. 96% chance of light rain throughout the night.
Light RainHigh 70°F21°CLow 64°F18°CPrecip 0.38 in9.7 mm92%Cloud 96%Wind ESE 4 mph7 km/hTuesday: Overcast and warm, with a high of 70°F21°C and morning low of 64°F18°C. Light wind from the ESE around 5 mph7 km/h. 92% chance of light rain throughout the day. Tuesday Night: Overcast, with a low around 64°F18°C. Light wind from the ESE around 4 mph6 km/h. 70% chance of light rain throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 275°F24°C69°F21°C0.04 in0.9 mm· 48%74%Light RainS 8 mph13 km/h
ThursdaySep 377°F25°C63°F17°C0 in0.1 mm· 4%35%ClearENE 7 mph11 km/h
FridaySep 486°F30°C
Feels 89°F31°C
63°F17°C0 in0 mm· —1%ClearNNE 7 mph11 km/h
SaturdaySep 583°F28°C
Feels 86°F30°C
70°F21°C0.03 in0.8 mm· 35%38%ShowersS 6 mph9 km/h
SundaySep 674°F23°C67°F20°C0.41 in10.3 mm· 92%97%Light RainSSW 8 mph13 km/h
MondaySep 767°F20°C64°F18°C0.41 in10.3 mm· 96%100%Light RainS 8 mph12 km/h
TuesdaySep 870°F21°C64°F18°C0.38 in9.7 mm· 92%96%Light RainESE 4 mph7 km/h
WednesdaySep 978°F26°C67°F20°C0.13 in3.2 mm· 42%79%Light RainNE 5 mph9 km/h
ThursdaySep 1080°F27°C70°F21°C0.13 in3.2 mm· 32%84%Light RainNE 7 mph12 km/h
FridaySep 1183°F28°C
Feels 87°F30°C
71°F22°C0.12 in3.1 mm· 29%75%Light RainNE 7 mph11 km/h
SaturdaySep 1281°F27°C
Feels 84°F29°C
71°F22°C0.06 in1.5 mm· 16%67%DrizzleSSE 7 mph11 km/h
SundaySep 1379°F26°C69°F21°C0.11 in2.7 mm· 28%75%DrizzleSSE 7 mph12 km/h
MondaySep 1476°F25°C68°F20°C0.14 in3.6 mm· 32%82%Light RainSE 7 mph11 km/h
TuesdaySep 1578°F26°C68°F20°C0.13 in3.2 mm· 40%75%Light RainE 6 mph10 km/h
WednesdaySep 1680°F27°C68°F20°C0.11 in2.7 mm· 29%66%DrizzleE 6 mph10 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 21.6403°S, 41.0511°W·Elevation: 7m·Timezone: America/Sao_Paulo·Population: 38,708