United StatesAverage weather for Johannesburg in September
It's hot in September in Johannesburg with an average temperature of 35°C. Temperatures this month range from a low of 31°C to a high of 39°C. At night, you can expect temperatures between 13°C and 21°C.
Start of September
The month of September starts in Johannesburg with hot temps, averaging around 38°C during the day and nights around 20°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 34°C, with nights around 16°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
Since it cools down at night, it’s a good idea to wear layers.
End of September
By the end of September, the average daytime temperature in Johannesburg is around 33°C, while nighttime temps are about 15°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
Because temperatures drop in the evening, wearing layers is recommended.
According to weather history, there is only 4,5 mm of precipitation in September. The wind speed is around 4 Bft, mostly coming from the Southwest.
Johannesburg in September |
New York | ||
|---|---|---|---|
 Average temperature |
35°C | 27°C | |
 Max. temperature |
39°C | 31°C | |
| Min. temperature |
31°C | -5°C | |
 Total precipitation |
4,5 mm | 57 mm | |
| Rainy days |
1 day | 9 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Johannesburg?
September is a good month to be in Johannesburg for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records
With 45°C in 2022, Johannesburg reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 21°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 26°C.
Check out the climate of Johannesburg for all months and discover the best travel time
Daily Temperature in September in Johannesburg
This chart shows the average daily high and low temperatures in September for Johannesburg, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Johannesburg
The chart below shows the average daily precipitation in September for Johannesburg, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 1 day of precipitation in Johannesburg.
Daily UV index in September in Johannesburg
This chart shows the average daily UV index in September in Johannesburg, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Johannesburg over the years
This chart shows the average temperature in September in Johannesburg, measured in degrees Celsius, over the past few years.
Total precipitation in September in Johannesburg over the years
This chart shows the average precipitation in September in Johannesburg, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Johannesburg
Click on any day in September to get detailed info about the usual weather on that day in Johannesburg. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Johannesburg
Have you been to Johannesburg in September?
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Average weather in Johannesburg by month
Click on a month below to see detailed weather info for Johannesburg. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Johannesburg for all months at once
