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
With December's advent, Irene, South Africa, sees an average high-temperature of a still moderately hot 28°C (82.4°F), subtly shifted from November's 27.6°C (81.7°F). Throughout December, the temperature in Irene tends to fall to a consistent average low of 17.1°C (62.8°F).Heat index
December's average heat index is evaluated at 29°C (84.2°F). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In Irene, the average relative humidity in December is 60%.Rainfall
In December, in Irene, the rain falls for 20.4 days. Throughout December, 87mm (3.43") of precipitation is accumulated. In Irene, during the entire year, the rain falls for 125.6 days and collects up to 446mm (17.56") of precipitation.Daylight
December has the longest days of the year in Irene, with an average of 13h and 42min of daylight.On the first day of December in Irene, sunrise is at 05:07 and sunset at 18:45. On the last day of the month, sunrise is at 05:18 and sunset at 19:02 SAST.
Sunshine
The average sunshine in December is 11.3h.UV index
January through March, October through December, with an average maximum UV index of 6, are months with the highest UV index in Irene. 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: During December, 6 as the daily maximum UV index converts into the following advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Irene during December?
What is the average humidity in December in Irene?
How much does it rain in Irene in December?
When are the longest days in Irene?
What is the average length of the day in December in Irene?
When is the sunrise / sunset in December in Irene?
How long on average sun shines in December in Irene?
What are the months with the highest UV index in Irene?
How high is the UV index in December in Irene?
Average temperature in December
Irene, South Africa
- Average high temperature in December: 28°C
The warmest month (with the highest average high temperature) is January (28.1°C).
The month with the lowest average high temperature is July (18.5°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 (6.8°C).
Average pressure in December
Irene, South Africa
- Average pressure in December: 1013.4mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1013.1mbar).
Average wind speed in December
Irene, South Africa
- Average wind speed in December: 9.6km/h
The windiest months (with the highest average wind speed) are October and November (11.2km/h).
The calmest month (with the lowest average wind speed) is May (7.5km/h).
Average humidity in December
Irene, South Africa
- Average humidity in December: 60%
The months with the highest relative humidity are January and February (63%).
The month with the lowest relative humidity is September (35%).
Average rainfall in December
Irene, South Africa
- Average rainfall in December: 87mm
The wettest month (with the highest rainfall) is January (97mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Irene, South Africa
- Average rainfall days in December: 20.4 days
The month with the highest number of rainy days is January (21.8 days).
The month with the least rainy days is July (1.2 days).
Average daylight in December /
Average sunshine in December
Irene, 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 30min).
- Average sunshine in December: 11h and 2min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 30min).
Average sunshine days in December
Irene, South Africa
- Average sunshine days in December: 6.1 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is December (6.1 days).
Average UV index in December
Irene, 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
Irene, 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
Irene, 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).
