Temperatures in December
It's cool to moderate in December in Johannesburg with an average temperature of 15°C. Temperatures this month range from a low of 12°C to a high of 17°C. At night, you can expect temperatures between -3°C and 4°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Johannesburg in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Johannesburg with cool temperatures, averaging around 16°C during the day and nights close to 2°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature drops to around 15°C, with nights close to 0°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
End of December
By the end of December, the average daytime temperature in Johannesburg will be around 14°C, with nights close to 1°C. A shower might show up, but overall the weather will be dry and sunny.
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Precipitation in December
In December, there is an average of 51 mm of precipitation, spread over 3 days. Of the total precipitation, about 1,8 cm falls as snow in December. The wind speed is around 3 Bft, mostly coming from the Southwest.
The precipitation chance averages 10% per day this month. There are only a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Johannesburg. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Johannesburg in December |
London | ||
|---|---|---|---|
 Average Temperature |
15°C | 9°C | |
 High Temp |
17°C | 11°C | |
| Low Temp |
12°C | 8°C | |
 Total Precipitation |
51 mm | 67 mm | |
| Rainy Days |
3 days | 10 days | |
 Total Snowfall |
1,8 cm | 1,2 cm | |
| Snowy Days |
1 day | 1 day | |
November
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is December a good time to visit Johannesburg?
Looking for sun and warm weather? Then December isn’t the best time to be in Johannesburg. The temperature is too low this month for a warm stay.
Temperature records for Johannesburg in December
With 25°C, Johannesburg hit the highest temperature in the last 10 years in December 2021. The lowest daytime temperature in this month was 5°C in 2019. The extreme night temperatures ranged from a low of -11°C to a high of 12°C.
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Daily Temperature in December in Johannesburg
This chart shows the average daily temperatures, both day and night, for each day in December in Johannesburg, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Johannesburg
The chart below shows the average daily precipitation in December for Johannesburg, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 3 days of rain in Johannesburg.
Daily Snowfall in December in Johannesburg
This chart shows the average daily snowfall in December in Johannesburg, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV Index in December in Johannesburg
This chart shows the average daily UV index in December 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 December in Johannesburg Over the Years
This chart shows the average temperature in December in Johannesburg, measured in degrees Celsius, over the past years.
Total Precipitation in December in Johannesburg Over the Years
This chart shows the average precipitation in December in Johannesburg, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Johannesburg per year
This chart shows the average snowfall in December in Johannesburg, measured in centimetres, over the past years.
Daily climate in December for Johannesburg
Click on a specific day in December for detailed info on the typical weather on that day in Johannesburg. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December 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.
Or check out the climate of Johannesburg for all months at once
