- Clothing
- Waterproof jacket and umbrella strongly recommended.
Tomorrow's Weather Forecast - Rio de Janeiro
Tomorrow's weather in Rio de Janeiro. high 28°C (82°F), low 22°C (72°F). Rainy.
Tomorrow’s Outlook
Tomorrow brings a similar temperature to today. Expect heavy rain in the evening, with rain chances climbing as high as 86%. That risk lines up with humidity averaging 91% through the day the more moisture in the air, the more readily clouds build into showers. Humidity stays high near 91%, so it will feel muggier and stickier than the temperature alone suggests. A light breeze near 20 km/h is expected. Sunrise is at 5:52 AM and sunset at 5:45 PM, for about 11h 54m of daylight.
- Tomorrow
- 28°/ 22°
- Today27° / 21°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon25°
- Rain probability
- 10%
- Wind speed
- 10 km/h
AfternoonNoon – 6 PM26°
- Rain probability
- 45%
- Wind speed
- 12 km/h
Evening6 PM – Midn23°
- Rain probability
- 86%
- Wind speed
- 16 km/h
NightMidn – 6 AM23°
- Rain probability
- 4%
- Wind speed
- 20 km/h
24-Hour Rain & Temperature Forecast
Tomorrow12 Sep
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Planning Advice for Tomorrow
- Outdoor
- Not ideal for outdoor plans or car washes — heavy rain expected.
- Travel
- Expect traffic slowdowns from wet roads. Allow extra time.
Sunrise & Sunset
Sunrise
Dawn 5:22 AMTotal Daylight
Full day forecastSolar noon 11:49 AM
Sunset
Dusk 6:15 PMvs today+2 min daylight
Sunrise shift1 min earlier
Sunset shiftSame time
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Rio de Janeiro is forecast to reach a high of 28°C tomorrow, with an overnight low around 22°C. That's 3° above the long-term average high of 25°C for this time of year. Expect a high chance of rain (86% probability) and a gentle breeze averaging 20 km/h. Air quality is currently Moderate (AQI 55), driven mainly by PM2.5 at 10 μg/m³.
Today vs Normal
27°C+2° above normal
The long-term average high for today is 25°C.
11 of the last 28 days with published data ran above normal.
That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Moderate
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.