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
February and December are identified as the warmest months, with an average high-temperature of 29.2°C (84.6°F).Heat index
In December, the heat index is estimated at a tropical 33°C (91.4°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Heat index details are generally centered around shaded locations and a mild breeze. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In December, the average relative humidity in Casteel is 71%.Rainfall
The month with the most rainfall is December, when the rain falls for 20.5 days and typically aggregates up to 116mm (4.57") of precipitation.Daylight
With an average of 13h and 36min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 04:58 and sunset at 18:31. On the last day of December, in Casteel, sunrise is at 05:09 and sunset at 18:48 SAST.
Sunshine
In December, the average sunshine in Casteel is 9.3h.UV index
The months with the highest UV index are January through April, September through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months in Casteel?
Is it hot in Casteel during December?
What is the average humidity in December in Casteel?
What is the rainiest month in Casteel?
How much does it rain in Casteel in December?
When are the longest days in Casteel?
How many hours of daylight does Casteel have in December?
What time are sunrise and sunset in December in Casteel?
How long on average sun shines in December in Casteel?
What is the month with the highest UV index in Casteel?
What is the UV index reading in December in Casteel?
Average temperature in December
Casteel, South Africa
- Average high temperature in December: 29.2°C
The warmest months (with the highest average high temperature) are February and December (29.2°C).
The month with the lowest average high temperature is July (22.8°C).
- Average low temperature in December: 19.1°C
The month with the highest average low temperature is January (19.4°C).
The coldest month (with the lowest average low temperature) is July (11.2°C).
Average pressure in December
Casteel, South Africa
- Average pressure in December: 1013.8mbar
The month with the highest atmospheric pressure is July (1024mbar).
The month with the lowest atmospheric pressure is January (1013.3mbar).
Average wind speed in December
Casteel, South Africa
- Average wind speed in December: 9.6km/h
The windiest month (with the highest average wind speed) is October (10.4km/h).
The calmest month (with the lowest average wind speed) is May (7.4km/h).
Average humidity in December
Casteel, South Africa
- Average humidity in December: 71%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).
Average rainfall in December
Casteel, South Africa
- Average rainfall in December: 116mm
The wettest month (with the highest rainfall) is December (116mm).
The driest months (with the least rainfall) are June and July (3mm).
Average rainfall days in December
Casteel, South Africa
- Average rainfall days in December: 20.5 days
The month with the highest number of rainy days is January (20.9 days).
The month with the least rainy days is June (2.3 days).
Average daylight in December /
Average sunshine in December
Casteel, 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 36min).
- Average sunshine in December: 9h and 2min
The month with the most sunshine is February (Average sunshine: 9h and 42min).
The month with the least sunshine is April (Average sunshine: 6h and 18min).
Average sunshine days in December
Casteel, South Africa
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is June (26.3 days).
The month with the least sunshine days is January (6.9 days).
Average UV index in December
Casteel, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February, March, April, September, October, November and December (UV index 6).
The months with the lowest UV index are May, June, July and August (UV index 5).
Average cloud cover in December
Casteel, South Africa
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 12).
Average visibility in December
Casteel, 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).
