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February is the hottest month in Rio de Janeiro, with an average high of 33°C / 91°F; July is the coldest (27°C / 80°F). February is the wettest month, averaging 78 mm / 3.1 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | 32 / 90 | 24 / 75 | 63 / 2.5 | 6 |
| Feb | 33 / 91 | 24 / 75 | 78 / 3.1 | 5 |
| Mar | 31 / 88 | 23 / 74 | 53 / 2.1 | 4 |
| Apr | 30 / 86 | 22 / 71 | 28 / 1.1 | 3 |
| May | 28 / 82 | 19 / 67 | 21 / 0.8 | 3 |
| Jun | 27 / 80 | 18 / 64 | 19 / 0.7 | 3 |
| Jul | 27 / 80 | 17 / 63 | 14 / 0.6 | 2 |
| Aug | 27 / 81 | 18 / 64 | 20 / 0.8 | 3 |
| Sep | 28 / 82 | 19 / 66 | 33 / 1.3 | 5 |
| Oct | 29 / 84 | 21 / 69 | 36 / 1.4 | 5 |
| Nov | 29 / 85 | 22 / 71 | 64 / 2.5 | 7 |
| Dec | 31 / 88 | 23 / 73 | 63 / 2.5 | 6 |
Extremes since 1973: highest 43°C / 109°F (January 18, 1986), lowest 0°C / 32°F (July 13, 1993).
Daylight lasts about 13.4 hours in December and 10.6 hours in June.
Data: Meteostat — Galeao, 1991–2020 averages.
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