Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The warmest period is usually observed in January and December, with the average high-temperature peaking at 27.3°C (81.1°F).Heat index
December's mean heat index is evaluated at 28°C (82.4°F). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
The average relative humidity in December in Randfontein, South Africa, is 60%.Rainfall
In Randfontein, South Africa, in December, during 19.2 rainfall days, 89mm (3.5") of precipitation is typically accumulated. In Randfontein, during the entire year, the rain falls for 117.1 days and collects up to 441mm (17.36") of precipitation.Daylight
The month with the longest days is December, with an average of 13h and 42min of daylight.On the first day of December in Randfontein, South Africa, sunrise is at 05:08 and sunset at 18:48. On the last day of the month, sunrise is at 05:19 and sunset at 19:05 SAST.
Sunshine
The average sunshine in December in Randfontein is 11.2h.UV index
January, February, October through December, with an average maximum UV index of 6, are months with the highest UV index in Randfontein, South Africa. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 during December leads to these advisories:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months in Randfontein?
What is the temperature in December in Randfontein?
What is the average humidity in December in Randfontein?
How much does it rain in Randfontein in December?
When are the longest days in Randfontein?
How many hours of daylight does Randfontein have in December?
What time are sunrise and sunset in December in Randfontein?
How many hours of sunshine does Randfontein have in December?
What is the month with the highest UV index in Randfontein?
How high is the UV index in December in Randfontein?
Average temperature in December
Randfontein, South Africa
- Average high temperature in December: 27.3°C
The warmest months (with the highest average high temperature) are January and December (27.3°C).
The months with the lowest average high temperature are June and July (17.8°C).
- Average low temperature in December: 16.6°C
The month with the highest average low temperature is December (16.6°C).
The coldest month (with the lowest average low temperature) is July (6.1°C).
Average pressure in December
Randfontein, South Africa
- Average pressure in December: 1013.2mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in December
Randfontein, South Africa
- Average wind speed in December: 10km/h
The windiest month (with the highest average wind speed) is November (11.7km/h).
The calmest month (with the lowest average wind speed) is May (7.8km/h).
Average humidity in December
Randfontein, South Africa
- Average humidity in December: 60%
The months with the highest relative humidity are January and February (64%).
The month with the lowest relative humidity is September (34%).
Average rainfall in December
Randfontein, South Africa
- Average rainfall in December: 89mm
The wettest month (with the highest rainfall) is January (90mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Randfontein, South Africa
- Average rainfall days in December: 19.2 days
The month with the highest number of rainy days is January (19.8 days).
The month with the least rainy days is July (1.2 days).
Average daylight in December /
Average sunshine in December
Randfontein, South Africa
- Average daylight in December: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in December: 11h and 1min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 24min).
Average sunshine days in December
Randfontein, South Africa
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in December
Randfontein, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in December
Randfontein, South Africa
- Average cloud cover in December: 25
The month with the most cloud cover is January (Cloud cover 26).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Randfontein, South Africa
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
