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 snowfall in December
- Average snowfall 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's beginning signals an average high-temperature of a still moderately hot 25.5°C (77.9°F), barely different from November's 24.2°C (75.6°F). In December, the average low-temperature is a refreshing 13.8°C (56.8°F).Humidity
The average relative humidity in December is 51%.Rainfall
December is the month with the most rainfall. Rain falls for 15.7 days and accumulates 71mm (2.8") of precipitation.Snowfall
January through May, September through December are months without snowfall.Daylight
With an average of 14h and 0min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 05:03 and sunset at 18:55. On the last day of December, in Modderpoort, sunrise is at 05:14 and sunset at 19:12 SAST.
Sunshine
In December, the average sunshine is 11.5h.UV index
January, November 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 unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during December leads to these advisories:
Resist overexposure. Safeguarding from solar damage is indispensable. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
When it does not snow?
When are the longest days?
How many hours of daylight does Modderpoort have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the highest UV index?
How high is the UV index in December?
Average temperature in December
Modderpoort, South Africa
- Average high temperature in December: 25.5°C
The warmest month (with the highest average high temperature) is January (26.1°C).
The month with the lowest average high temperature is June (13.6°C).
- Average low temperature in December: 13.8°C
The month with the highest average low temperature is January (14.8°C).
The coldest month (with the lowest average low temperature) is June (2.1°C).
Average pressure in December
Modderpoort, South Africa
- Average pressure in December: 1013.5mbar
The month with the highest atmospheric pressure is July (1025.3mbar).
The month with the lowest atmospheric pressure is December (1013.5mbar).
Average wind speed in December
Modderpoort, South Africa
- Average wind speed in December: 10.2km/h
The windiest month (with the highest average wind speed) is November (11.1km/h).
The calmest month (with the lowest average wind speed) is May (7km/h).
Average humidity in December
Modderpoort, South Africa
- Average humidity in December: 51%
The month with the highest relative humidity is February (59%).
The month with the lowest relative humidity is September (35%).
Average rainfall in December
Modderpoort, South Africa
- Average rainfall in December: 71mm
The wettest month (with the highest rainfall) is December (71mm).
The driest months (with the least rainfall) are July and August (7mm).
Average rainfall days in December
Modderpoort, South Africa
- Average rainfall days in December: 15.7 days
The month with the highest number of rainy days is January (15.9 days).
The month with the least rainy days is June (2.8 days).
Average snowfall in December
Modderpoort, South Africa
- Average snowfall in December: 0mm
The month with the highest snowfall is July (7mm).
The months with the least snowfall are January, February, March, April, May, September, October, November and December (0mm).
Average snowfall days in December
Modderpoort, South Africa
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is June (0.8 days).
The months with the least snowfall days are January, February, March, April, May, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Modderpoort, South Africa
- Average daylight in December: 14h and 0min
The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 18min).
- Average sunshine in December: 11h and 3min
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
Modderpoort, South Africa
- Average sunshine days in December: 11.9 days
The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is January (11 days).
Average UV index in December
Modderpoort, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 3).
Average cloud cover in December
Modderpoort, South Africa
- Average cloud cover in December: 19
The month with the most cloud cover is February (Cloud cover 20).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in December
Modderpoort, 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).
