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
In December, the shift in Vaalwater's meteorological conditions is hardly detectable, with high temperatures identical to those of November. During the nights in December, an average low-temperature of 17.8°C (64°F) is observed.Heat index
The heat index value during December is calculated to be a tropical 30°C (86°F). If one remains active during constant exposure, it might cause exhaustion and heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 hold particular importance for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
In December, the average relative humidity is 61%.Rainfall
In Vaalwater, in December, it is raining for 20.9 days, with typically 79mm (3.11") of accumulated precipitation. Throughout the year, there are 118.6 rainfall days, and 410mm (16.14") of precipitation is accumulated.Daylight
With an average of 13h and 36min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 05:10 and sunset at 18:42. On the last day of the month, sunrise is at 05:22 and sunset at 18:59 SAST.
Sunshine
In December, the average sunshine is 11.4h.UV index
January through March, September through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 6 during December translates into the following guidance:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during December?
What is the average humidity in December in Vaalwater?
How much does it rain in December?
When are the longest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Vaalwater have in December?
What are the months with the highest UV index?
What is the UV index reading in December?
Average temperature in December
Vaalwater, South Africa
- Average high temperature in December: 28.4°C
The warmest month (with the highest average high temperature) is October (28.8°C).
The month with the lowest average high temperature is June (19.6°C).
- Average low temperature in December: 17.8°C
The month with the highest average low temperature is December (17.8°C).
The coldest month (with the lowest average low temperature) is July (6.3°C).
Average pressure in December
Vaalwater, South Africa
- Average pressure in December: 1012.7mbar
The month with the highest atmospheric pressure is July (1024.1mbar).
The month with the lowest atmospheric pressure is January (1012.2mbar).
Average wind speed in December
Vaalwater, South Africa
- Average wind speed in December: 8.1km/h
The windiest month (with the highest average wind speed) is October (9.7km/h).
The calmest month (with the lowest average wind speed) is May (5.4km/h).
Average humidity in December
Vaalwater, South Africa
- Average humidity in December: 61%
The month with the highest relative humidity is February (67%).
The month with the lowest relative humidity is September (39%).
Average rainfall in December
Vaalwater, South Africa
- Average rainfall in December: 79mm
The wettest month (with the highest rainfall) is January (101mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in December
Vaalwater, South Africa
- Average rainfall days in December: 20.9 days
The month with the highest number of rainy days is January (21.6 days).
The month with the least rainy days is August (1 days).
Average daylight in December /
Average sunshine in December
Vaalwater, South Africa
- Average daylight in December: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in December: 11h and 2min
The month with the most sunshine is October (Average sunshine: 11h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 30min).
Average sunshine days in December
Vaalwater, South Africa
- Average sunshine days in December: 7 days
The month with the most sunshine days is August (29.5 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in December
Vaalwater, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February, March, September, 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
Vaalwater, South Africa
- Average cloud cover in December: 26
The month with the most cloud cover is January (Cloud cover 30).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Vaalwater, 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).
