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
Germiston experiences peak temperatures, averaging a high-temperature of 27.2°C (81°F) during January, February and December.Heat index
In December, the average heat index is estimated at 28°C (82.4°F). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in December is 60%.Rainfall
The month with the most rainfall is December, when the rain falls for 19.7 days and typically aggregates up to 86mm (3.39") of precipitation.Daylight
With an average of 13h and 48min of daylight, December has the longest days of the year in Germiston, South Africa.On the first day of December in Germiston, sunrise is at 05:06 and sunset at 18:46. On the last day of the month, sunrise is at 05:17 and sunset at 19:03 SAST.
Sunshine
The average sunshine in December is 11.3h.UV index
The average daily maximum UV index in December in Germiston is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 5 during December translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Germiston?
What are December temperatures in Germiston?
What is the average humidity in December in Germiston?
What is the rainiest month in Germiston?
How much does it rain in Germiston in December?
When are the longest days in Germiston?
What is the average length of the day in December in Germiston?
When are sunrise and sunset in December in Germiston?
How long on average sun shines in December in Germiston?
How high is the UV index in December in Germiston?
Average temperature in December
Germiston, South Africa
- Average high temperature in December: 27.2°C
The warmest months (with the highest average high temperature) are January, February and December (27.2°C).
The month with the lowest average high temperature is July (17.6°C).
- Average low temperature in December: 16°C
The month with the highest average low temperature is January (16.2°C).
The coldest month (with the lowest average low temperature) is July (6°C).
Average pressure in December
Germiston, South Africa
- Average pressure in December: 1013.5mbar
The month with the highest atmospheric pressure is July (1024.7mbar).
The month with the lowest atmospheric pressure is January (1013.3mbar).
Average wind speed in December
Germiston, South Africa
- Average wind speed in December: 10km/h
The windiest month (with the highest average wind speed) is November (11.7km/h).
The calmest month (with the lowest average wind speed) is May (8km/h).
Average humidity in December
Germiston, South Africa
- Average humidity in December: 60%
The month with the highest relative humidity is February (65%).
The month with the lowest relative humidity is September (34%).
Average rainfall in December
Germiston, South Africa
- Average rainfall in December: 86mm
The wettest month (with the highest rainfall) is December (86mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in December
Germiston, South Africa
- Average rainfall days in December: 19.7 days
The month with the highest number of rainy days is January (19.8 days).
The month with the least rainy days is July (1.5 days).
Average daylight in December /
Average sunshine in December
Germiston, South Africa
- Average daylight in December: 13h and 5min
The month with the longest days is December (Average daylight: 13h and 48min).
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
Germiston, South Africa
- Average sunshine days in December: 7.5 days
The months with the most sunshine days are July and August (28.8 days).
The month with the least sunshine days is December (7.5 days).
Average UV index in December
Germiston, South Africa
- Average UV index in December: 5
The months with the highest UV index are January, 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
Germiston, South Africa
- Average cloud cover in December: 26
The month with the most cloud cover is January (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Germiston, South Africa
- Average visibility in December: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
