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 Rivonia, December is the month with the highest recorded average temperatures, measuring a high of 27.5°C (81.5°F) and a low of 16.3°C (61.3°F).Heat index
December's mean heat index is evaluated at 29°C (84.2°F). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Heat index evaluations are typically in the context of light winds and shaded environments. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
The average relative humidity in December is 60%.Rainfall
In Rivonia, in December, it is raining for 10.3 days, with typically 46mm (1.81") of accumulated precipitation. In Rivonia, during the entire year, the rain falls for 77.6 days and collects up to 262mm (10.31") of precipitation.Daylight
With an average of 13h and 42min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 05:07 and sunset at 18:46. On the last day of the month, sunrise is at 05:18 and sunset at 19:03 SAST.
Sunshine
The average sunshine in December is 11.3h.UV index
In Rivonia, the average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 5 transforms into these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months in Rivonia?
What is the usual temperature for Rivonia in December?
What is the average humidity in December?
How much does it rain in December?
When are the longest days?
What is the average length of the day in December in Rivonia?
When is the sunrise / sunset in December?
How long on average sun shines in December?
How high is the UV index in December?
Average temperature in December
Rivonia, South Africa
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is December (27.5°C).
The month with the lowest average high temperature is July (17.9°C).
- Average low temperature in December: 16.3°C
The month with the highest average low temperature is January (16.6°C).
The coldest month (with the lowest average low temperature) is July (6.1°C).
Average pressure in December
Rivonia, South Africa
- Average pressure in December: 1013.3mbar
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
Rivonia, South Africa
- Average wind speed in December: 9.9km/h
The windiest month (with the highest average wind speed) is November (11.6km/h).
The calmest month (with the lowest average wind speed) is May (7.8km/h).
Average humidity in December
Rivonia, South Africa
- Average humidity in December: 60%
The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is September (34%).
Average rainfall in December
Rivonia, South Africa
- Average rainfall in December: 46mm
The wettest month (with the highest rainfall) is January (57mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Rivonia, South Africa
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is January (13.2 days).
The month with the least rainy days is July (1.4 days).
Average daylight in December /
Average sunshine in December
Rivonia, 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 24min).
Average sunshine days in December
Rivonia, South Africa
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is January (16.3 days).
Average UV index in December
Rivonia, South Africa
- Average UV index in December: 5
The months with the highest UV index are January, February, October and November (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in December
Rivonia, South Africa
- Average cloud cover in December: 25
The month with the most cloud cover is January (Cloud cover 26).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Rivonia, 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).
