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 advent of December reveals an average high-temperature of a still warm 28.1°C (82.6°F), showing minimal difference from the prior month. The average nighttime temperature lowers to a comfortable 17.1°C (62.8°F) throughout December.Heat index
For December, the heat index is calculated to be a hot 30°C (86°F). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Humidity
In December, the average relative humidity is 61%.Rainfall
In Tweefontein, in December, it is raining for 20.5 days, with typically 81mm (3.19") of accumulated precipitation. In Tweefontein, during the entire year, the rain falls for 123.3 days and collects up to 430mm (16.93") 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, sunrise is at 05:05 and sunset at 18:41. On the last day of the month, sunrise is at 05:17 and sunset at 18:58 SAST.
Sunshine
The average sunshine in December is 11.3h.UV index
The months with the highest UV index are January through March, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 6 in December interprets into the following advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December?
What is the average humidity in December?
How much does it rain in December?
When are the longest days?
How many hours of daylight does Tweefontein have in December?
What time are sunrise and sunset in December in Tweefontein?
How many hours of sunshine does Tweefontein have in December?
What are the months with the highest UV index?
What is the UV index reading in December?
Average temperature in December
Tweefontein, South Africa
- Average high temperature in December: 28.1°C
The warmest month (with the highest average high temperature) is January (28.3°C).
The months with the lowest average high temperature are June and July (18.8°C).
- Average low temperature in December: 17.1°C
The months with the highest average low temperature are January and December (17.1°C).
The coldest month (with the lowest average low temperature) is July (6.7°C).
Average pressure in December
Tweefontein, South Africa
- Average pressure in December: 1013.5mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1013.2mbar).
Average wind speed in December
Tweefontein, South Africa
- Average wind speed in December: 9.9km/h
The windiest months (with the highest average wind speed) are October and November (11.5km/h).
The calmest month (with the lowest average wind speed) is May (7.7km/h).
Average humidity in December
Tweefontein, South Africa
- Average humidity in December: 61%
The months with the highest relative humidity are January and February (64%).
The month with the lowest relative humidity is September (36%).
Average rainfall in December
Tweefontein, South Africa
- Average rainfall in December: 81mm
The wettest month (with the highest rainfall) is January (92mm).
The driest month (with the least rainfall) is July (0mm).
Average rainfall days in December
Tweefontein, South Africa
- Average rainfall days in December: 20.5 days
The month with the highest number of rainy days is January (21.8 days).
The month with the least rainy days is July (0.8 days).
Average daylight in December /
Average sunshine in December
Tweefontein, 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 36min).
- Average sunshine in December: 11h and 2min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The months with the least sunshine are April and August (Average sunshine: 7h and 30min).
Average sunshine days in December
Tweefontein, South Africa
- Average sunshine days in December: 6.5 days
The month with the most sunshine days is July (29.8 days).
The months with the least sunshine days are January and December (6.5 days).
Average UV index in December
Tweefontein, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February, March, 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
Tweefontein, South Africa
- Average cloud cover in December: 25
The month with the most cloud cover is January (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Tweefontein, 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).
