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 18.3 ° C ( 64.9°F )  Patchy rain nearby |
Feels Like : 18.3 ° C / 64.9°F Humidity : % 88 Pressure : 1025 mb Wind Speed : 10.1 kmph / 6.3 miles from NE 
Visibility : 10 km Precipitation (rainfall) : 0.04 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 |
|---|---|---|---|---|---|---|---|
| 14 December 2025 Sun | Patchy rain nearby |
15.3 ° C | 21 ° C | 17.5 ° C | % 81 | 18.4 km/h | 98% |
| 15 December 2025 Mon |  Sunny |
15.2 ° C | 26.2 ° C | 21 ° C | % 62 | 11.5 km/h | 0% |
| 16 December 2025 Tue | Sunny |
17.4 ° C | 27.9 ° C | 22.8 ° C | % 52 | 11.9 km/h | 0% |
| 17 December 2025 Wed |  Moderate rain |
18 ° C | 29.3 ° C | 23.3 ° C | % 50 | 21.6 km/h | 69% |
| 18 December 2025 Thu | Patchy rain nearby |
16.2 ° C | 27 ° C | 20.1 ° C | % 71 | 12.2 km/h | 87% |
| 19 December 2025 Fri | Patchy rain nearby |
15 ° C | 24.8 ° C | 19.4 ° C | % 67 | 18.7 km/h | 85% |
| 20 December 2025 Sat | Patchy rain nearby |
14.7 ° C | 23.3 ° C | 18.2 ° C | % 67 | 15.1 km/h | 79% |
| 21 December 2025 Sun | Sunny |
14.8 ° C | 25.7 ° C | 20.2 ° C | % 54 | 10.4 km/h | 0% |
| 22 December 2025 Mon | Sunny |
16.3 ° C | 28.4 ° C | 21.8 ° C | % 42 | 15.8 km/h | 0% |
| 23 December 2025 Tue | Sunny |
20.2 ° C | 30.8 ° C | 25.4 ° C | % 35 | 15.8 km/h | 0% |
| 24 December 2025 Wed | Sunny |
18.2 ° C | 27.9 ° C | 22.2 ° C | % 55 | 19.8 km/h | 0% |
| 25 December 2025 Thu | Patchy rain nearby |
17.1 ° C | 29.7 ° C | 20.9 ° C | % 67 | 15.5 km/h | 87% |
| 26 December 2025 Fri | Patchy rain nearby |
16.3 ° C | 30 ° C | 22.3 ° C | % 61 | 14 km/h | 87% |
| 27 December 2025 Sat | Patchy rain nearby |
17.9 ° C | 31.4 ° C | 23.1 ° C | % 59 | 40.3 km/h | 86% |
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