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
December is Gertrudsburg's warmest month, registering average high temperatures of 28.5°C (83.3°F) and lows of 17.7°C (63.9°F).Heat index
For most parts of December, the heat index is evaluated at a hot 32°C (89.6°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
In December, the average relative humidity is 70%.Rainfall
The month with the most rainfall is December, when the rain falls for 20.1 days and typically aggregates up to 106mm (4.17") of precipitation.Daylight
The month with the longest days in Gertrudsburg is December, with an average of 13h and 30min of daylight.On the first day of the month, sunrise is at 05:06 and sunset at 18:33. On the last day of December, sunrise is at 05:18 and sunset at 18:49 SAST.
Sunshine
In Gertrudsburg, South Africa, the average sunshine in December is 9.6h.UV index
January, March, September through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 6 transforms into these recommendations:
Deflect overexposure. Sun protection is a necessity. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest?
How hot does it get in December?
What is the average humidity in December in Gertrudsburg?
What is the wettest month?
How many days does it rain in December?
When are the longest days?
How many hours of daylight does Gertrudsburg have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the highest UV index?
What is the UV index intensity in December?
Average temperature in December
Gertrudsburg, South Africa
- Average high temperature in December: 28.5°C
The warmest month (with the highest average high temperature) is December (28.5°C).
The month with the lowest average high temperature is July (21°C).
- Average low temperature in December: 17.7°C
The month with the highest average low temperature is December (17.7°C).
The coldest month (with the lowest average low temperature) is July (8.6°C).
Average pressure in December
Gertrudsburg, South Africa
- Average pressure in December: 1012.7mbar
The month with the highest atmospheric pressure is July (1023.6mbar).
The month with the lowest atmospheric pressure is January (1012.2mbar).
Average wind speed in December
Gertrudsburg, South Africa
- Average wind speed in December: 9.2km/h
The windiest month (with the highest average wind speed) is October (10.6km/h).
The calmest month (with the lowest average wind speed) is May (6.7km/h).
Average humidity in December
Gertrudsburg, South Africa
- Average humidity in December: 70%
The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is September (51%).
Average rainfall in December
Gertrudsburg, South Africa
- Average rainfall in December: 106mm
The wettest month (with the highest rainfall) is December (106mm).
The driest month (with the least rainfall) is August (2mm).
Average rainfall days in December
Gertrudsburg, South Africa
- Average rainfall days in December: 20.1 days
The month with the highest number of rainy days is December (20.1 days).
The month with the least rainy days is June (2.8 days).
Average daylight in December /
Average sunshine in December
Gertrudsburg, South Africa
- Average daylight in December: 13h and 3min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in December: 9h and 4min
The month with the most sunshine is October (Average sunshine: 10h and 36min).
The month with the least sunshine is April (Average sunshine: 6h and 24min).
Average sunshine days in December
Gertrudsburg, South Africa
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is August (25.9 days).
The month with the least sunshine days is December (7.4 days).
Average UV index in December
Gertrudsburg, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, March, September, October, November and December (UV index 6).
The month with the lowest UV index is June (UV index 4).
Average cloud cover in December
Gertrudsburg, South Africa
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Gertrudsburg, South Africa
- Average visibility in December: 9km
The months with the highest visibility are June, August, September and October (10km).
The month with the lowest visibility is January (8km).
