Climate averages 1991–2020
Johannesburg weather
in March.
A warm, moderately wet month: the 7th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a warm month in Johannesburg: daytime highs average 22.8°C and nights cool to about 12.3°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 89 mm of rain on roughly 13 days, which makes March a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average March day.
The nearest other city in this atlas is Alberton (11 km away). In March its highs average 24.0°C, 1.2°C warmer than Johannesburg, with 89 mm of rain.
Among the 95 cities listed in South Africa, Johannesburg ranks 92nd of 95 for the warmest March highs and joint 66th of 95 for the driest March (rainfall, lowest first). The mean March high of those 95 cities is 25.6°C; Johannesburg is 2.8°C cooler than that mean.
From March to April, average highs fall by 2.4°C to 20.4°C, and monthly rainfall falls from 89 mm to 45 mm.
The annual picture
March in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Johannesburg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.3°C14.1°C | 14.1°C | 132 | 16.4 | 13.614 h |
| February | 24.1°C13.9°C | 13.9°C | 111 | 14.1 | 13.013 h |
| March, selected | 22.8°C12.3°C | 12.3°C | 89 | 12.7 | 12.312 h |
| April | 20.4°C9.3°C | 9.3°C | 45 | 7.3 | 11.511 h |
| May | 18.4°C5.7°C | 5.7°C | 17 | 2.9 | 10.911 h |
| June | 16.1°C2.9°C | 2.9°C | 7.8 | 1.3 | 10.511 h |
| July | 16.3°C2.2°C | 2.2°C | 3.0 | 0.8 | 10.711 h |
| August | 19.4°C4.9°C | 4.9°C | 9.8 | 2.0 | 11.211 h |
| September | 23.4°C8.5°C | 8.5°C | 22 | 3.7 | 11.912 h |
| October | 24.4°C10.9°C | 10.9°C | 75 | 10.7 | 12.713 h |
| November | 24.1°C12.3°C | 12.3°C | 100 | 14.0 | 13.413 h |
| December | 24.3°C13.7°C | 13.7°C | 138 | 18.0 | 13.714 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Alberton in MarchSouth Africa · 11 kmHigh 24.0°C · Low 13.3°C · 89 mm rain
- Germiston in MarchSouth Africa · 12 kmHigh 23.8°C · Low 13.2°C · 83 mm rain
- Randburg in MarchSouth Africa · 13 kmHigh 24.1°C · Low 13.4°C · 80 mm rain
- Roodepoort in MarchSouth Africa · 18 kmHigh 23.0°C · Low 12.5°C · 90 mm rain
- Tokoza in MarchSouth Africa · 19 kmHigh 24.1°C · Low 13.4°C · 83 mm rain
- Soweto in MarchSouth Africa · 20 kmHigh 23.4°C · Low 13.1°C · 90 mm rain
- Midrand in MarchSouth Africa · 26 kmHigh 24.0°C · Low 13.4°C · 80 mm rain
- Benoni in MarchSouth Africa · 28 kmHigh 23.7°C · Low 13.1°C · 83 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Johannesburg) is explained once on the Johannesburg year overview and on the Sources, method and limits page.
Alberton lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.