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South Africa
Randburg weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Randburg?
For a warm holiday, the best week has been 14–20 January (Weather Index 96). Favourable start dates for a 7-day trip run from 10 January to 20 January. January is warmest (27°C), July and August are driest and January has the most sun.
- Warmest
- January 27°C
- Coolest
- June and July 19°C
- Driest
- July and August 2% rain-day chance
- Wettest
- December 53% rain-day chance
- Sunniest
- January 12 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Randburg
Randburg historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 26.5 | 15.8 | 45.2 | 14.0 | 127.8 | 11.5 |
| February | 26.0 | 15.8 | 52.1 | 14.6 | 126.8 | 10.9 |
| March | 25.5 | 14.2 | 31.6 | 9.8 | 70.6 | 10.7 |
| April | 22.7 | 10.9 | 25.0 | 7.5 | 67.9 | 9.9 |
| May | 21.1 | 7.0 | 8.7 | 2.7 | 17.8 | 9.8 |
| June | 18.8 | 3.9 | 3.7 | 1.1 | 4.9 | 9.9 |
| July | 18.7 | 3.7 | 2.3 | 0.7 | 3.6 | 10.1 |
| August | 21.9 | 6.5 | 1.9 | 0.6 | 2.2 | 10.6 |
| September | 25.5 | 10.2 | 9.3 | 2.8 | 10.3 | 11.4 |
| October | 26.2 | 12.3 | 23.9 | 7.4 | 51.9 | 11.2 |
| November | 26.1 | 14.0 | 42.7 | 12.8 | 86.7 | 11.3 |
| December | 26.0 | 15.4 | 53.2 | 16.5 | 120.5 | 11.1 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.