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 experiences an average high-temperature of a moderately hot 23.5°C (74.3°F), barely different from November's 22°C (71.6°F). In the month of December, Gelvandale records a consistent average low-temperature of 17.8°C (64°F).Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 76%.Rainfall
In Gelvandale, in December, it is raining for 15.8 days, with typically 25mm (0.98") of accumulated precipitation. In Gelvandale, during the entire year, the rain falls for 138.6 days and collects up to 314mm (12.36") of precipitation.Daylight
December has the longest days of the year, with an average of 14h and 24min of daylight.On the first day of December, sunrise is at 04:59 and sunset at 19:14. On the last day of the month, sunrise is at 05:09 and sunset at 19:32 SAST.
Sunshine
The average sunshine in December is 9.4h.UV index
January, February 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 threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 6 during December translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the most humid month?
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?
When 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
Gelvandale, South Africa
- Average high temperature in December: 23.5°C
The warmest month (with the highest average high temperature) is February (25.3°C).
The month with the lowest average high temperature is July (19.7°C).
- Average low temperature in December: 17.8°C
The month with the highest average low temperature is February (19.5°C).
The coldest months (with the lowest average low temperature) are July and August (13.3°C).
Average pressure in December
Gelvandale, South Africa
- Average pressure in December: 1014.2mbar
The month with the highest atmospheric pressure is July (1021.9mbar).
The month with the lowest atmospheric pressure is January (1013.5mbar).
Average wind speed in December
Gelvandale, South Africa
- Average wind speed in December: 18.8km/h
The windiest month (with the highest average wind speed) is October (20.3km/h).
The calmest month (with the lowest average wind speed) is May (16.4km/h).
Average humidity in December
Gelvandale, South Africa
- Average humidity in December: 76%
The months with the highest relative humidity are January, February and December (76%).
The month with the lowest relative humidity is June (62%).
Average rainfall in December
Gelvandale, South Africa
- Average rainfall in December: 25mm
The wettest month (with the highest rainfall) is March (33mm).
The driest month (with the least rainfall) is May (21mm).
Average rainfall days in December
Gelvandale, South Africa
- Average rainfall days in December: 15.8 days
The month with the highest number of rainy days is December (15.8 days).
The month with the least rainy days is June (7.8 days).
Average daylight in December /
Average sunshine in December
Gelvandale, South Africa
- Average daylight in December: 14h and 2min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in December: 9h and 2min
The month with the most sunshine is November (Average sunshine: 9h and 48min).
The month with the least sunshine is August (Average sunshine: 6h and 30min).
Average sunshine days in December
Gelvandale, South Africa
- Average sunshine days in December: 11 days
The month with the most sunshine days is May (21.3 days).
The month with the least sunshine days is February (10 days).
Average UV index in December
Gelvandale, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are March, April, May, June, July, August, September, October and November (UV index 5).
Average cloud cover in December
Gelvandale, South Africa
- Average cloud cover in December: 39
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 22).
Average visibility in December
Gelvandale, South Africa
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
