The biggest temperature swing occurs between August and September, as typical highs shift from 20.1°C / 68.2°F to 24°C / 75.2°F (about 3.9°C / 7°F).
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | 14.5°C | 24.7°C | WARM |
| February | 14.3°C | 24.5°C | WARM |
| March | 12.8°C | 23.4°C | WARM |
| April | 9.8°C | 21°C | MILD |
| May | 6.4°C | 18.9°C | MILD |
| June | 3.4°C | 16.6°C | MILD |
| July | 2.6°C | 16.7°C | MILD |
| August | 5.4°C | 20.1°C | MILD |
| September | 9°C | 24°C | WARM |
| October | 11.4°C | 25°C | WARM |
| November | 12.8°C | 24.7°C | WARM |
| December | 14.2°C | 24.8°C | WARM |
January has the warmest typical feels-like highs (26.1°C / 79°F), while July is coolest (12.7°C / 54.9°F).
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | 13.9°C | 26.1°C | WARM |
| February | 13.7°C | 25.8°C | WARM |
| March | 11.8°C | 23.7°C | WARM |
| April | 7.9°C | 19.7°C | MILD |
| May | 3.4°C | 16.1°C | MILD |
| June | -0.3°C | 12.7°C | COOL |
| July | -1.3°C | 12.7°C | COOL |
| August | 1.7°C | 16.4°C | MILD |
| September | 5.6°C | 21.1°C | MILD |
| October | 8.9°C | 23.5°C | WARM |
| November | 11.1°C | 24.2°C | WARM |
| December | 13.3°C | 25.5°C | WARM |
December is wettest at 132.5 mm / 5.22 inches, while July is driest at 2.8 mm / 0.11 inches.
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | -49.1 mm | 126.2 mm | WET |
| February | -49.1 mm | 106 mm | MODERATE |
| March | -49.1 mm | 80.8 mm | MODERATE |
| April | -49.1 mm | 48.3 mm | LIGHT |
| May | -49.1 mm | 18 mm | DRY |
| June | -49.1 mm | 7.8 mm | DRY |
| July | -49.1 mm | 2.8 mm | DRY |
| August | -49.1 mm | 8.9 mm | DRY |
| September | -49.1 mm | 20 mm | DRY |
| October | -49.1 mm | 68 mm | MODERATE |
| November | -49.1 mm | 91.3 mm | MODERATE |
| December | -49.1 mm | 132.5 mm | WET |
January has the strongest peak UV (around index 10.2).
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 10.2 | VERY HIGH |
| February | 0 | 10 | VERY HIGH |
| March | 0 | 9.3 | VERY HIGH |
| April | 0 | 7.8 | HIGH |
| May | 0 | 6.2 | HIGH |
| June | 0 | 5.2 | MODERATE |
| July | 0 | 5.7 | MODERATE |
| August | 0 | 7.1 | HIGH |
| September | 0 | 8.4 | VERY HIGH |
| October | 0 | 9.5 | VERY HIGH |
| November | 0 | 9.9 | VERY HIGH |
| December | 0 | 10.1 | VERY HIGH |
Daylight ranges from 10.5h in June to 13.8h in December.
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 13.6h | LONG |
| February | 0h | 13h | BALANCED |
| March | 0h | 12.2h | BALANCED |
| April | 0h | 11.5h | BALANCED |
| May | 0h | 10.8h | BALANCED |
| June | 0h | 10.5h | BALANCED |
| July | 0h | 10.7h | BALANCED |
| August | 0h | 11.2h | BALANCED |
| September | 0h | 11.9h | BALANCED |
| October | 0h | 12.7h | BALANCED |
| November | 0h | 13.4h | LONG |
| December | 0h | 13.8h | LONG |
January is most humid (71.2%), while September is driest (41.7%).
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 31.4% | 71.2% | HUMID |
| February | 31.4% | 71% | HUMID |
| March | 31.4% | 69.5% | HUMID |
| April | 31.4% | 66.7% | HUMID |
| May | 31.4% | 58% | COMFORTABLE |
| June | 31.4% | 54.5% | COMFORTABLE |
| July | 31.4% | 49.6% | COMFORTABLE |
| August | 31.4% | 44.4% | DRY |
| September | 31.4% | 41.7% | DRY |
| October | 31.4% | 52.1% | COMFORTABLE |
| November | 31.4% | 61.5% | COMFORTABLE |
| December | 31.4% | 68.6% | HUMID |
September has the strongest typical average wind (12.8 km/h / 7.9 mph), while March is calmest (9.2 km/h / 5.7 mph).
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 7.7 km/h | 9.9 km/h | CALM |
| February | 7.7 km/h | 9.5 km/h | CALM |
| March | 7.7 km/h | 9.2 km/h | CALM |
| April | 7.7 km/h | 9.3 km/h | CALM |
| May | 7.7 km/h | 9.6 km/h | CALM |
| June | 7.7 km/h | 10.4 km/h | CALM |
| July | 7.7 km/h | 10.5 km/h | CALM |
| August | 7.7 km/h | 12 km/h | CALM |
| September | 7.7 km/h | 12.8 km/h | CALM |
| October | 7.7 km/h | 12.7 km/h | CALM |
| November | 7.7 km/h | 12.4 km/h | CALM |
| December | 7.7 km/h | 11.1 km/h | CALM |
September is windiest by P95 gust signal (57.2 km/h / 35.5 mph).
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 43.9 km/h | WINDY |
| February | 0 km/h | 42.5 km/h | WINDY |
| March | 0 km/h | 42.1 km/h | WINDY |
| April | 0 km/h | 44.6 km/h | WINDY |
| May | 0 km/h | 45 km/h | WINDY |
| June | 0 km/h | 46.8 km/h | WINDY |
| July | 0 km/h | 48.2 km/h | WINDY |
| August | 0 km/h | 55.1 km/h | VERY WINDY |
| September | 0 km/h | 57.2 km/h | VERY WINDY |
| October | 0 km/h | 55.8 km/h | VERY WINDY |
| November | 0 km/h | 54.7 km/h | VERY WINDY |
| December | 0 km/h | 49.7 km/h | WINDY |
December has the most rain days (~20.8), while July has the fewest (~1.2). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | -6.7 days | 19.8 days | VERY FREQUENT |
| February | -6.7 days | 16.8 days | VERY FREQUENT |
| March | -6.7 days | 15.7 days | VERY FREQUENT |
| April | -6.7 days | 9.8 days | FREQUENT |
| May | -6.7 days | 4.3 days | SOME |
| June | -6.7 days | 2 days | RARE |
| July | -6.7 days | 1.2 days | RARE |
| August | -6.7 days | 2.6 days | RARE |
| September | -6.7 days | 4.5 days | SOME |
| October | -6.7 days | 12 days | FREQUENT |
| November | -6.7 days | 16.7 days | VERY FREQUENT |
| December | -6.7 days | 20.8 days | VERY FREQUENT |
January has the most heavy rain/washout risk days (~8). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 8 days | PERSISTENT |
| February | 0 days | 7 days | PERSISTENT |
| March | 0 days | 5 days | FREQUENT |
| April | 0 days | 3 days | FREQUENT |
| May | 0 days | 1 days | OCCASIONAL |
| June | 0 days | 1 days | OCCASIONAL |
| July | 0 days | 0 days | RARE |
| August | 0 days | 0 days | RARE |
| September | 0 days | 1 days | OCCASIONAL |
| October | 0 days | 4 days | FREQUENT |
| November | 0 days | 7 days | PERSISTENT |
| December | 0 days | 8 days | PERSISTENT |
October has the highest heat-risk day count (~1 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | LOW |
| February | 0 days | 0 days | LOW |
| March | 0 days | 0 days | LOW |
| April | 0 days | 0 days | LOW |
| May | 0 days | 0 days | LOW |
| June | 0 days | 0 days | LOW |
| July | 0 days | 0 days | LOW |
| August | 0 days | 0 days | LOW |
| September | 0 days | 0 days | LOW |
| October | 0 days | 1 days | LOW |
| November | 0 days | 0 days | LOW |
| December | 0 days | 0 days | LOW |
Daylight varies from 10.5 hours in June (winter) to 13.8 hours in December (summer), which is a difference of 3.3 hours.
Southern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | Jul 0 risk days | Aug 0 risk days | May 1 risk days | Jun 1 risk days |
| Lowest heatwave risk | Jan 0 risk days | Feb 0 risk days | Mar 0 risk days | Apr 0 risk days |
| Lowest cold risk | Feb 0 risk days | Jan 1 risk days | Dec 1 risk days | Mar 2 risk days |
| Lowest wind disruption risk | Mar 42 km/h | Feb 43 km/h | Jan 44 km/h | Apr 45 km/h |
| Most comfortable evenings | Feb 68 / 100 | Jan 67 / 100 | Dec 67 / 100 | Mar 66 / 100 |
| Best outdoor reliability | Jul 92 / 100 | May 90 / 100 | Jun 88 / 100 | Aug 83 / 100 |
Click any month for detailed weather information and packing advice.
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitThe best months to visit Johannesburg South depend on your preferences. For warm weather, October is typically the warmest month. For dry conditions, July, June, August tend to have the least rainfall. Consider your priorities, and whether you prefer warmer temperatures, drier weather, or longer daylight hours.
October is typically the warmest month in Johannesburg South, with average high temperatures reaching around 25°C (77°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
July is usually the coldest month, with average low temperatures dropping to around 3°C (37°F). Pack warm layers if visiting during this time, especially for evening activities.
December typically sees the most rainfall in Johannesburg South, averaging around 132mm (5.2 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
July is typically the driest month, with average rainfall of just 3mm (0.1 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
Temperatures in Johannesburg South range from average lows of 10°C (49°F) to highs of 22°C (72°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Yes, sun protection is important in Johannesburg South. UV levels can reach 10 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.