South AfricaThe weather in January in Johannesburg
It's warm in January in Johannesburg with an average temperature of 28°C. Temperatures this month range from a low of 26°C to a high of 29°C. At night, you can expect temperatures between 16°C and 17°C.
Looking for sun? January isn’t a good month to be in Johannesburg. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Johannesburg, South Africa. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2016, Johannesburg reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 18°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 10°C to a highest value of 21°C.
Rainfall amount
In January, there is an average of 120 mm of precipitation, spread over 16 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in January for Johannesburg
Click on any day in January 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.
January weather comparison
| Johannesburg | New York | |
|---|---|---|
| Average temperature | 28°C | 5°C |
| Max. temperature | 29°C | 11°C |
| Min. temperature | 16°C | -5°C |
| Total precipitation | 120 mm | 97 mm |
| Rainy days | 16 days | 12 days |
Start of January
The month of January starts in Johannesburg with hot temps, averaging around 28°C during the day and nights around 17°C.
Mid January
By mid-January, daytime temps rise to around 29°C, with nights around 17°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of January
By the end of January, the average daytime temperature in Johannesburg is around 28°C, while nighttime temps are about 17°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Johannesburg for all months and discover the best travel time
Curious about the weather in other parts of South Africa? Check out the climate and weather for spots like Cape Town, Krugerpark, Stellenbosch, or explore other destinations in South Africa.
Temperature charts
These charts show the average temperatures in January in Johannesburg, South Africa. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Johannesburg
Temperature in January in Johannesburg over the years
Precipitation charts
These charts show the average amount of precipitation in January in Johannesburg, South Africa. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Johannesburg
Total precipitation in January in Johannesburg over the years
Daily UV index in January in Johannesburg
This chart shows the average daily UV index in January 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.
Weather experiences in January in Johannesburg
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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.