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
| 21 December 2025 Sun 18.1 ° C ( 64.6°F )  Moderate or heavy rain with thunder |
Feels Like : 18.1 ° C / 64.6°F Humidity : % 94 Pressure : 1019 mb Wind Speed : 13 kmph / 8.1 miles from NE 
Visibility : 10 km Precipitation (rainfall) : 0.44 mm Cloud (%) : 75 |
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 |
|---|---|---|---|---|---|---|---|
| 21 December 2025 Sun |  Moderate rain |
16.8 ° C | 18.6 ° C | 17.9 ° C | % 80 | 13 km/h | 97% |
| 22 December 2025 Mon | Moderate rain |
14.9 ° C | 22.2 ° C | 18.5 ° C | % 80 | 14 km/h | 86% |
| 23 December 2025 Tue |  Patchy rain nearby |
15 ° C | 25.8 ° C | 19.7 ° C | % 72 | 13 km/h | 89% |
| 24 December 2025 Wed | Moderate rain |
16.6 ° C | 26.9 ° C | 21.4 ° C | % 68 | 11.5 km/h | 87% |
| 25 December 2025 Thu | Moderate rain |
16.1 ° C | 26.8 ° C | 20.4 ° C | % 75 | 11.9 km/h | 83% |
| 26 December 2025 Fri | Moderate rain |
16 ° C | 26.2 ° C | 19.9 ° C | % 78 | 32.8 km/h | 88% |
| 27 December 2025 Sat | Patchy rain nearby |
16.2 ° C | 25.2 ° C | 19.8 ° C | % 71 | 24.5 km/h | 87% |
| 28 December 2025 Sun | Patchy rain nearby |
15.5 ° C | 25.8 ° C | 20.2 ° C | % 71 | 16.2 km/h | 88% |
| 29 December 2025 Mon | Patchy rain nearby |
13.6 ° C | 20.4 ° C | 16.7 ° C | % 77 | 16.9 km/h | 84% |
| 30 December 2025 Tue |  Sunny |
13.6 ° C | 26.7 ° C | 20.2 ° C | % 59 | 6.8 km/h | 0% |
| 31 December 2025 Wed | Sunny |
17.8 ° C | 27.6 ° C | 23 ° C | % 45 | 12.2 km/h | 0% |
| 01 January 2026 Thu | Sunny |
18.3 ° C | 28.3 ° C | 23.3 ° C | % 47 | 17.6 km/h | 0% |
| 02 January 2026 Fri | Sunny |
18.1 ° C | 25.6 ° C | 22.2 ° C | % 59 | 17.6 km/h | 0% |
| 03 January 2026 Sat | Patchy rain nearby |
17 ° C | 27.7 ° C | 22.5 ° C | % 62 | 18 km/h | 86% |
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