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
| 19 December 2025 Fri 21.1 ° C ( 70°F )  Clear |
Feels Like : 21.1 ° C / 70°F Humidity : % 78 Pressure : 1024 mb Wind Speed : 4 kmph / 2.5 miles from NNW 
Visibility : 10 km Precipitation (rainfall) : 0 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 |
|---|---|---|---|---|---|---|---|
| 19 December 2025 Fri |  Patchy rain nearby |
16.4 ° C | 23.8 ° C | 19.8 ° C | % 68 | 14 km/h | 82% |
| 20 December 2025 Sat | Sunny |
17.3 ° C | 29.2 ° C | 22.4 ° C | % 55 | 18.4 km/h | 0% |
| 21 December 2025 Sun |  Moderate rain |
16.1 ° C | 22.9 ° C | 19.3 ° C | % 74 | 20.9 km/h | 86% |
| 22 December 2025 Mon | Moderate rain |
15.3 ° C | 18.6 ° C | 16.6 ° C | % 90 | 19.1 km/h | 84% |
| 23 December 2025 Tue | Moderate rain |
14.7 ° C | 16.9 ° C | 15.4 ° C | % 91 | 14 km/h | 80% |
| 24 December 2025 Wed | Patchy rain nearby |
14.7 ° C | 20.5 ° C | 17.5 ° C | % 85 | 14.8 km/h | 77% |
| 25 December 2025 Thu | Patchy rain nearby |
16.1 ° C | 24.9 ° C | 20.3 ° C | % 75 | 7.9 km/h | 82% |
| 26 December 2025 Fri | Patchy rain nearby |
15.9 ° C | 26.9 ° C | 21.1 ° C | % 67 | 16.9 km/h | 75% |
| 27 December 2025 Sat | Patchy rain nearby |
15.8 ° C | 25.9 ° C | 20.5 ° C | % 71 | 10.1 km/h | 87% |
| 28 December 2025 Sun | Sunny |
16.1 ° C | 28.8 ° C | 22.5 ° C | % 61 | 15.5 km/h | 0% |
| 29 December 2025 Mon | Sunny |
19 ° C | 31.6 ° C | 24.9 ° C | % 40 | 17.6 km/h | 0% |
| 30 December 2025 Tue | Patchy rain nearby |
18.2 ° C | 30 ° C | 22.5 ° C | % 59 | 17.6 km/h | 72% |
| 31 December 2025 Wed | Sunny |
18.7 ° C | 32 ° C | 24.9 ° C | % 45 | 21.2 km/h | 0% |
| 01 January 2026 Thu | Sunny |
18.6 ° C | 31.2 ° C | 24.6 ° C | % 46 | 18.7 km/h | 0% |
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