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 18 ° C ( 64.4°F )  Partly Cloudy |
Feels Like : 18 ° C / 64.4°F Humidity : % 100 Pressure : 1021 mb Wind Speed : 4.7 kmph / 2.9 miles from WNW 
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 |
|---|---|---|---|---|---|---|---|
| 13 December 2025 Sat |  Moderate rain |
16.3 ° C | 18.8 ° C | 17.9 ° C | % 77 | 14.8 km/h | 98% |
| 14 December 2025 Sun | Moderate rain |
15.3 ° C | 21.8 ° C | 18.5 ° C | % 77 | 17.6 km/h | 89% |
| 15 December 2025 Mon |  Patchy rain nearby |
15.4 ° C | 28.2 ° C | 21.5 ° C | % 62 | 14 km/h | 89% |
| 16 December 2025 Tue |  Heavy rain |
15.9 ° C | 28.7 ° C | 21.8 ° C | % 60 | 21.2 km/h | 86% |
| 17 December 2025 Wed | Patchy rain nearby |
17.9 ° C | 30.1 ° C | 23.1 ° C | % 52 | 18.4 km/h | 88% |
| 18 December 2025 Thu | Patchy rain nearby |
16.5 ° C | 28.3 ° C | 20.9 ° C | % 64 | 26.6 km/h | 83% |
| 19 December 2025 Fri | Partly Cloudy |
12.8 ° C | 19.6 ° C | 16.2 ° C | % 68 | 27.4 km/h | 0% |
| 20 December 2025 Sat |  Sunny |
11.1 ° C | 24.9 ° C | 18.5 ° C | % 48 | 16.2 km/h | 0% |
| 21 December 2025 Sun | Sunny |
13.5 ° C | 26.1 ° C | 19.9 ° C | % 51 | 13 km/h | 0% |
| 22 December 2025 Mon | Sunny |
18.1 ° C | 29.2 ° C | 23.5 ° C | % 42 | 17.3 km/h | 0% |
| 23 December 2025 Tue | Patchy rain nearby |
18.8 ° C | 28.1 ° C | 23.3 ° C | % 50 | 14 km/h | 82% |
| 24 December 2025 Wed | Moderate rain |
16.8 ° C | 26.8 ° C | 20.6 ° C | % 69 | 14 km/h | 88% |
| 25 December 2025 Thu | Patchy rain nearby |
15.7 ° C | 28.6 ° C | 21.4 ° C | % 67 | 15.5 km/h | 81% |
| 26 December 2025 Fri | Patchy rain nearby |
17.4 ° C | 28.9 ° C | 22.3 ° C | % 63 | 15.5 km/h | 88% |
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