Johannesburg in September
In September, Johannesburg averages 25°C (77°F) during the day and 10°C (50°F) at night, with around 6 days of rain (12 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
September is a great month to visit Johannesburg: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Johannesburg
September is in the middle of the year for warmth in Johannesburg (6th of 12) and moderately rainy compared to the rest of the year (8th of 12). Daytime temperature runs 2°C above the annual average (23°C). September runs 4°C warmer than August (21°C) and warms a further 1°C into October (26°C).
September sunrise & sunset in Johannesburg
Times shown for Johannesburg local time (Africa/Johannesburg), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Johannesburg — September
Golden-hour and blue-hour windows for the 15th of September, in Johannesburg's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Johannesburg in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Johannesburg's popularity.
Crowds & pricing — September in Johannesburg
This is a busy month in Johannesburg — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Johannesburg
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Johannesburg in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 26°C / 78°F | 15°C / 58°F | 120 mm | 23 | — |
| February | 25°C / 77°F | 14°C / 58°F | 107 mm | 21 | — |
| March | 24°C / 75°F | 13°C / 55°F | 76 mm | 19 | — |
| April | 21°C / 70°F | 10°C / 50°F | 50 mm | 14 | — |
| May | 20°C / 67°F | 7°C / 45°F | 16 mm | 5 | — |
| June | 17°C / 63°F | 4°C / 40°F | 6 mm | 3 | — |
| July | 17°C / 63°F | 4°C / 38°F | 4 mm | 3 | — |
| August | 21°C / 69°F | 7°C / 44°F | 5 mm | 4 | — |
| September | 25°C / 77°F | 10°C / 50°F | 12 mm | 6 | — |
| October | 26°C / 79°F | 12°C / 53°F | 47 mm | 13 | — |
| November | 26°C / 78°F | 13°C / 56°F | 81 mm | 18 | — |
| December | 25°C / 78°F | 15°C / 58°F | 127 mm | 21 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Johannesburg in September →
Frequently asked questions
How hot is Johannesburg in September?
In September, Johannesburg averages a high of 25°C (77°F) and a low of 10°C (50°F) — generally warm.
Does it rain a lot in Johannesburg in September?
September sees occasional rain in Johannesburg, with about 6 rainy days on average.
Is September a good time to visit Johannesburg?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Johannesburg in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for Johannesburg for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.