El Niño in Johannesburg
During El Niño, Johannesburg gets on average 20% less rain in February–April than in neutral years (190 mm vs 239 mm).
Weather in Johannesburg: next 7 days
Johannesburg
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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 Johannesburg 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 | 108 mm | 127 mm | 132 mm | -15% | 21.9 / 21.4 °C |
| February | 72 mm | 106 mm | 114 mm | -31% | 22.3 / 20.8 °C |
| March | 78 mm | 88 mm | 89 mm | -11% | 20.5 / 19.6 °C |
| April | 39 mm | 45 mm | 48 mm | -12% | 17.6 / 16.3 °C |
| May | 18 mm | 13 mm | 18 mm | +40% | 13.5 / 13.1 °C |
| June | 9 mm | 9 mm | 8 mm | -6% | 9.8 / 9.8 °C |
| July | 5 mm | 3 mm | 2 mm | — | 9.5 / 9.8 °C |
| August | 8 mm | 8 mm | 3 mm | +4% | 13.2 / 12.9 °C |
| September | 27 mm | 14 mm | 20 mm | +99% | 17.0 / 17.2 °C |
| October | 60 mm | 69 mm | 81 mm | -14% | 19.5 / 19.3 °C |
| November | 80 mm | 100 mm | 114 mm | -20% | 20.7 / 20.2 °C |
| December | 130 mm | 111 mm | 125 mm | +17% | 21.7 / 21.2 °C |
NASA POWER (MERRA-2), 1981–2025, classified by NOAA ONI. Averages, not a forecast.
Frequently asked questions
How does El Niño affect Johannesburg?
During El Niño, Johannesburg gets on average 20% less rain in February–April than in neutral years (190 mm vs 239 mm).
And La Niña?
In February–April, La Niña years average 252 mm, compared with 239 mm in neutral years.
Where does this data come from?
Monthly rainfall and temperature from NASA POWER (MERRA-2 reanalysis, 1981–2025) at -26.2, 28.05, classified by NOAA's Oceanic Niño Index for each month. These are averages; each event is different.