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 Rookdale, December records the highest average temperatures, peaking at 29.3°C (84.7°F) and reaching a low of 15.6°C (60.1°F).Heat index
The heat index value during December is calculated to be a tropical 33°C (91.4°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In Rookdale, the average relative humidity in December is 67%.Rainfall
In December, in Rookdale, the rain falls for 22.5 days. Throughout December, 89mm (3.5") of precipitation is accumulated. Throughout the year, in Rookdale, there are 149.6 rainfall days, and 523mm (20.59") of precipitation is accumulated.Daylight
With an average of 13h and 54min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 04:57 and sunset at 18:47. On the last day of December, sunrise is at 05:07 and sunset at 19:04 SAST.
Sunshine
The average sunshine in December is 10.7h.UV index
January, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 6 in December translates into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. 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. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest in Rookdale?
How hot is December in Rookdale?
What is the average humidity in December in Rookdale?
How much does it rain in Rookdale in December?
When are the longest days in Rookdale?
How many hours of daylight does Rookdale have in December?
What time are sunrise and sunset in December in Rookdale?
How many hours of sunshine does Rookdale have in December?
What are the months with the highest UV index in Rookdale?
What is the UV index reading in December in Rookdale?
Average temperature in December
Rookdale, South Africa
- Average high temperature in December: 29.3°C
The warmest month (with the highest average high temperature) is December (29.3°C).
The month with the lowest average high temperature is June (19.7°C).
- Average low temperature in December: 15.6°C
The month with the highest average low temperature is January (16°C).
The coldest month (with the lowest average low temperature) is July (6.2°C).
Average pressure in December
Rookdale, South Africa
- Average pressure in December: 1014.9mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is December (1014.9mbar).
Average wind speed in December
Rookdale, South Africa
- Average wind speed in December: 7.7km/h
The windiest months (with the highest average wind speed) are October and November (8.9km/h).
The calmest month (with the lowest average wind speed) is May (6km/h).
Average humidity in December
Rookdale, South Africa
- Average humidity in December: 67%
The month with the highest relative humidity is February (73%).
The months with the lowest relative humidity are August and September (45%).
Average rainfall in December
Rookdale, South Africa
- Average rainfall in December: 89mm
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in December
Rookdale, South Africa
- Average rainfall days in December: 22.5 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is June (2.8 days).
Average daylight in December /
Average sunshine in December
Rookdale, South Africa
- Average daylight in December: 13h and 5min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 18min).
- Average sunshine in December: 10h and 4min
The month with the most sunshine is October (Average sunshine: 11h and 6min).
The month with the least sunshine is April (Average sunshine: 7h and 6min).
Average sunshine days in December
Rookdale, South Africa
- Average sunshine days in December: 4.1 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is December (4.1 days).
Average UV index in December
Rookdale, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, 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
Rookdale, South Africa
- Average cloud cover in December: 34
The month with the most cloud cover is January (Cloud cover 36).
The months with the least cloud cover are June and July (Cloud cover 9).
Average visibility in December
Rookdale, South Africa
- Average visibility in December: 9km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January and February (8km).
