Johannesburg-Grand Central Airport (GCJ) 15 Day Weather Forecast, Johannesburg South Africa
Current weather conditions and 15 day weather forecast for Johannesburg-Grand Central Airport in Johannesburg, South Africa including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at GCJ
| 14 December 2025 Sun 17.2 ° C ( 63°F )  Light rain |
Feels Like : 17.2 ° C / 63°F Humidity : % 94 Pressure : 1025 mb Wind Speed : 17.3 kmph / 10.7 miles from ENE 
Visibility : 8 km Precipitation (rainfall) : 0.13 mm Cloud (%) : 100 |
15-day weather forecast for Johannesburg-Grand Central Airport, Johannesburg, South Africa
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 14 December 2025 Sun |  Moderate rain |
15.8 ° C | 21 ° C | 18 ° C | % 79 | 19.4 km/h | 93% |
| 15 December 2025 Mon |  Sunny |
14.5 ° C | 26.8 ° C | 20.5 ° C | % 63 | 11.9 km/h | 0% |
| 16 December 2025 Tue | Sunny |
17.4 ° C | 28.6 ° C | 23 ° C | % 48 | 17.6 km/h | 0% |
| 17 December 2025 Wed | Moderate rain |
18.1 ° C | 27.9 ° C | 21.5 ° C | % 62 | 18 km/h | 86% |
| 18 December 2025 Thu |  Patchy rain nearby |
16.1 ° C | 27 ° C | 20.3 ° C | % 70 | 15.1 km/h | 87% |
| 19 December 2025 Fri |  Partly Cloudy |
16.5 ° C | 25.6 ° C | 20.4 ° C | % 67 | 16.2 km/h | 0% |
| 20 December 2025 Sat | Moderate rain |
16 ° C | 27.2 ° C | 19.1 ° C | % 72 | 15.1 km/h | 85% |
| 21 December 2025 Sun | Patchy rain nearby |
15.5 ° C | 23.7 ° C | 19.5 ° C | % 71 | 11.2 km/h | 88% |
| 22 December 2025 Mon | Patchy rain nearby |
15.3 ° C | 23.6 ° C | 19.5 ° C | % 70 | 18.4 km/h | 88% |
| 23 December 2025 Tue | Patchy rain nearby |
15.2 ° C | 21.6 ° C | 17.6 ° C | % 83 | 14.4 km/h | 83% |
| 24 December 2025 Wed | Patchy rain nearby |
15 ° C | 26.7 ° C | 20.8 ° C | % 66 | 22 km/h | 82% |
| 25 December 2025 Thu | Patchy rain nearby |
19 ° C | 27.9 ° C | 22.3 ° C | % 59 | 15.5 km/h | 88% |
| 26 December 2025 Fri | Patchy rain nearby |
17.1 ° C | 27.8 ° C | 22 ° C | % 66 | 15.1 km/h | 82% |
| 27 December 2025 Sat | Moderate rain |
18.1 ° C | 21.4 ° C | 19.8 ° C | % 82 | 8.6 km/h | 87% |
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