Rio de Janeiro, Brazil Weather
Rio de Janeiro hourly forecast: next 24 hours
Today's high of 67°F (19°C) is about 13°F (7°C) below the typical September high of 80°F (27°C).
Current conditions in detail
Rio de Janeiro weather tomorrow (Thursday, September 17)
Tomorrow in Rio de Janeiro looks patchy rain nearby, with a high of 66° and an overnight low of 65°. There is a 81% chance of rain - plan accordingly. Winds top out near 10 mph, and the UV index reaches 2 (low).
Rio de Janeiro 14-day forecast
About the weather in Rio de Janeiro
Rio de Janeiro has one of the steadier climates in our dataset. Average highs move only 6°C across the whole year - from 77°F (25°C) in July to 87°F (30°C) in January - so the practical difference between seasons here is rainfall and daylight, not warmth.
Rio de Janeiro weather: quick facts
- Hottest month: January - highs near 87°F (30°C)
- Coldest month: July - highs near 77°F (25°C)
- Decade extremes (2015-2024): 104°F (40°C) high · 53°F (12°C) low
- Wettest month: January (15 rainy days) · Sunniest: January (10.5 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 6°C between the average warmest and coolest month · day to night: 6°C
- Months averaging 30°C or hotter: 2
- Average humidity: 80%
Temperatures through the year
At its warmest, in January, Rio de Janeiro runs to 87°F (30°C) in the afternoon and back to 75°F (24°C) by dawn. July is the coolest month, with highs of 77°F (25°C) and lows near 65°F (18°C). The gridded 2015-2024 daily record for this location tops out at 104°F (40°C) and bottoms at 53°F (12°C) - decade extremes, not all-time station records. January is the wettest month at 6.3 inches (161 mm) over 15 days; July is the driest.
Rain, sun and snow
January is the brightest month at 10.5 hours of sun a day, against an annual average of 9.7. Between the average January and the average July lie 6°C, a narrower spread than about 84% of the cities we track. Days and nights are about 6°C apart on average - narrower than about 89% of the cities we track.
Season by season
September through November
September through November in Rio de Janeiro settles into easy warmth, with daytime highs averaging 80°F (27°C) and nights around 69°F (20°C); rain falls on around 40 of the 90 days.
December through February
December through February is hot here - highs near 86°F (30°C), nights near 74°F (24°C), and rain falls on around 46 of the 90 days. Daylight is generous - around 10.3 hours of sun a day.
March through May
March through May sits firmly in the heat here - highs near 81°F (27°C), nights near 71°F (22°C), and rain falls on around 37 of the 90 days.
June through August
June through August in Rio de Janeiro settles into easy warmth, with daytime highs averaging 77°F (25°C) and nights around 65°F (18°C); expect showers on roughly 25 days across the season.
Average temperatures in Rio de Janeiro by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 87° | 75° | 15 | 6.3 in | 10.5 h/day | 79% |
| February | 86° | 75° | 15 | 5.9 in | 10.1 h/day | 81% |
| March | 85° | 74° | 14 | 6.0 in | 10.4 h/day | 82% |
| April | 81° | 71° | 12 | 3.2 in | 10.1 h/day | 81% |
| May | 78° | 68° | 10 | 2.5 in | 9.2 h/day | 81% |
| June | 77° | 66° | 9 | 1.6 in | 9.0 h/day | 80% |
| July | 77° | 65° | 7 | 1.6 in | 9.0 h/day | 79% |
| August | 78° | 64° | 10 | 2.5 in | 9.0 h/day | 78% |
| September | 80° | 67° | 9 | 2.8 in | 9.6 h/day | 79% |
| October | 80° | 69° | 15 | 3.5 in | 9.1 h/day | 81% |
| November | 81° | 70° | 16 | 5.8 in | 9.6 h/day | 82% |
| December | 84° | 73° | 16 | 5.4 in | 10.4 h/day | 82% |