El Niño in Rio de Janeiro
During El Niño, Rio de Janeiro gets on average 19% less rain in July–September than in neutral years (162 mm vs 198 mm).
Weather in Rio de Janeiro: next 7 days
Rio de Janeiro
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Weather forecast: MET Norway (CC BY 4.0), updated every hour. For official warnings, follow your national weather service.
El Niño is active right now: the El Niño columns show what Rio de Janeiro typically sees in this phase.
Monthly rainfall by phase
El NiñoNeutralLa Niña
Month by month
| Month | El Niño | Neutral | La Niña | Change El Niño | Temp. El Niño / neutral |
|---|---|---|---|---|---|
| January | 226 mm | 197 mm | 199 mm | +14% | 25.9 / 25.2 °C |
| February | 167 mm | 136 mm | 162 mm | +22% | 25.8 / 25.6 °C |
| March | 193 mm | 168 mm | 164 mm | +14% | 25.3 / 25.2 °C |
| April | 108 mm | 116 mm | 115 mm | -7% | 24.4 / 23.9 °C |
| May | 82 mm | 79 mm | 70 mm | +3% | 22.3 / 22.3 °C |
| June | 72 mm | 53 mm | 43 mm | +35% | 21.3 / 21.3 °C |
| July | 36 mm | 53 mm | 57 mm | -32% | 20.9 / 20.5 °C |
| August | 43 mm | 55 mm | 34 mm | -22% | 21.2 / 20.8 °C |
| September | 83 mm | 91 mm | 73 mm | -9% | 21.8 / 21.4 °C |
| October | 106 mm | 94 mm | 136 mm | +13% | 22.8 / 22.5 °C |
| November | 177 mm | 200 mm | 165 mm | -11% | 24.0 / 23.3 °C |
| December | 213 mm | 205 mm | 233 mm | +4% | 24.9 / 24.4 °C |
NASA POWER (MERRA-2), 1981–2025, classified by NOAA ONI. Averages, not a forecast.
Frequently asked questions
How does El Niño affect Rio de Janeiro?
During El Niño, Rio de Janeiro gets on average 19% less rain in July–September than in neutral years (162 mm vs 198 mm).
And La Niña?
In July–September, La Niña years average 163 mm, compared with 198 mm in neutral years.
Where does this data come from?
Monthly rainfall and temperature from NASA POWER (MERRA-2 reanalysis, 1981–2025) at -22.91, -43.17, classified by NOAA's Oceanic Niño Index for each month. These are averages; each event is different.