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
December is the warmest month, with the temperature often reaching an average high of 31.6°C (88.9°F) and an average low of 20.1°C (68.2°F).Heat index
For December, the heat index is evaluated at a sweltering 39°C (102.2°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
In Ronaldsey, the average relative humidity in December is 70%.Rainfall
The month with the most rainfall is December, when the rain falls for 17.4 days and typically aggregates up to 79mm (3.11") of precipitation.Daylight
December has the longest days of the year, with an average of 13h and 42min of daylight.On the first day of the month, sunrise is at 04:56 and sunset at 18:31. On the last day of December, sunrise is at 05:08 and sunset at 18:47 SAST.
Sunshine
In December, the average sunshine is 8.9h.UV index
The average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 6 translates into these guidelines:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest?
How hot is it in December?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December in Ronaldsey?
When are the longest days?
How many hours of daylight does Ronaldsey have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Ronaldsey, South Africa
- Average high temperature in December: 31.6°C
The warmest month (with the highest average high temperature) is December (31.6°C).
The month with the lowest average high temperature is July (24.9°C).
- Average low temperature in December: 20.1°C
The month with the highest average low temperature is January (20.3°C).
The coldest month (with the lowest average low temperature) is June (12°C).
Average pressure in December
Ronaldsey, South Africa
- Average pressure in December: 1013.8mbar
The month with the highest atmospheric pressure is July (1023.9mbar).
The month with the lowest atmospheric pressure is January (1013.2mbar).
Average wind speed in December
Ronaldsey, South Africa
- Average wind speed in December: 10.4km/h
The windiest month (with the highest average wind speed) is September (11.9km/h).
The calmest month (with the lowest average wind speed) is May (7.8km/h).
Average humidity in December
Ronaldsey, South Africa
- Average humidity in December: 70%
The months with the highest relative humidity are January, February and March (74%).
The month with the lowest relative humidity is September (53%).
Average rainfall in December
Ronaldsey, South Africa
- Average rainfall in December: 79mm
The wettest month (with the highest rainfall) is December (79mm).
The driest months (with the least rainfall) are June and July (4mm).
Average rainfall days in December
Ronaldsey, South Africa
- Average rainfall days in December: 17.4 days
The month with the highest number of rainy days is January (18.2 days).
The month with the least rainy days is June (2.6 days).
Average daylight in December /
Average sunshine in December
Ronaldsey, 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: 8h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is April (Average sunshine: 6h and 18min).
Average sunshine days in December
Ronaldsey, South Africa
- Average sunshine days in December: 10.7 days
The month with the most sunshine days is June (26 days).
The month with the least sunshine days is January (9.7 days).
Average UV index in December
Ronaldsey, South Africa
- Average UV index in December: 6
The months with the highest UV index are January and November (UV index 7).
The months with the lowest UV index are June and July (UV index 5).
Average cloud cover in December
Ronaldsey, South Africa
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 14).
Average visibility in December
Ronaldsey, South Africa
- Average visibility in December: 9km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).
