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
| 13 December 2025 Sat 17.2 ° C ( 63°F )  Light rain |
Feels Like : 17.2 ° C / 63°F Humidity : % 100 Pressure : 1021 mb Wind Speed : 10.4 kmph / 6.5 miles from NW 
Visibility : 9 km Precipitation (rainfall) : 0.95 mm Cloud (%) : 0 |
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 |
|---|---|---|---|---|---|---|---|
| 13 December 2025 Sat |  Moderate rain |
15.7 ° C | 18.7 ° C | 17.3 ° C | % 79 | 13 km/h | 93% |
| 14 December 2025 Sun |  Patchy rain nearby |
14.7 ° C | 18.5 ° C | 16.4 ° C | % 84 | 15.8 km/h | 85% |
| 15 December 2025 Mon |  Sunny |
14.7 ° C | 28.1 ° C | 21.2 ° C | % 57 | 11.9 km/h | 0% |
| 16 December 2025 Tue | Sunny |
18.2 ° C | 28.6 ° C | 22.8 ° C | % 50 | 12.2 km/h | 0% |
| 17 December 2025 Wed | Patchy rain nearby |
18.5 ° C | 29.7 ° C | 23.3 ° C | % 45 | 18.4 km/h | 77% |
| 18 December 2025 Thu | Patchy rain nearby |
16.8 ° C | 20.1 ° C | 17.7 ° C | % 84 | 13 km/h | 82% |
| 19 December 2025 Fri | Patchy rain nearby |
11.7 ° C | 26.9 ° C | 18.3 ° C | % 64 | 22.7 km/h | 81% |
| 20 December 2025 Sat | Patchy rain nearby |
10.8 ° C | 22.7 ° C | 16.5 ° C | % 62 | 17.6 km/h | 87% |
| 21 December 2025 Sun | Patchy rain nearby |
13.8 ° C | 24 ° C | 18.4 ° C | % 65 | 14 km/h | 86% |
| 22 December 2025 Mon | Patchy rain nearby |
14.9 ° C | 25.8 ° C | 19.3 ° C | % 69 | 15.1 km/h | 89% |
| 23 December 2025 Tue | Sunny |
15.8 ° C | 28.8 ° C | 22 ° C | % 58 | 13 km/h | 0% |
| 24 December 2025 Wed | Patchy rain nearby |
17.3 ° C | 28.2 ° C | 20.9 ° C | % 65 | 13.7 km/h | 88% |
| 25 December 2025 Thu | Patchy rain nearby |
16.1 ° C | 27.4 ° C | 20.1 ° C | % 73 | 18 km/h | 89% |
| 26 December 2025 Fri | Moderate rain |
15.7 ° C | 24.2 ° C | 19 ° C | % 77 | 19.4 km/h | 87% |
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