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
Shifting into December, Cannon Rocks records an average high-temperature of a still pleasant 22.1°C (71.8°F), presenting minor fluctuations compared to the previous month. In Cannon Rocks, the nighttime temperature in December descends gently to an average of 18.7°C (65.7°F).Humidity
In December, the average relative humidity in Cannon Rocks is 78%.Rainfall
September and December are months with the least rain when the rain falls for 14.5 days and typically aggregates up to 22mm (0.87") of rain.Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 04:56 and sunset at 19:09. On the last day of the month, sunrise is at 05:06 and sunset at 19:27 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 in Cannon Rocks, South Africa. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 6 during December morphs into the following directions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Cannon Rocks?
What is the average humidity in December in Cannon Rocks?
What is the driest month in Cannon Rocks?
How many days does it rain in December in Cannon Rocks?
When are the longest days in Cannon Rocks?
What is the average length of the day in December in Cannon Rocks?
What time are sunrise and sunset in December in Cannon Rocks?
How long on average sun shines in December in Cannon Rocks?
When is the highest UV index in Cannon Rocks?
What is the UV index reading in December in Cannon Rocks?
Average temperature in December
Cannon Rocks, South Africa
- Average high temperature in December: 22.1°C
The warmest months (with the highest average high temperature) are January and February (23.8°C).
The month with the lowest average high temperature is August (19.1°C).
- Average low temperature in December: 18.7°C
The month with the highest average low temperature is February (20.2°C).
The coldest month (with the lowest average low temperature) is August (14.6°C).
Average pressure in December
Cannon Rocks, South Africa
- Average pressure in December: 1014.3mbar
The month with the highest atmospheric pressure is July (1021.8mbar).
The months with the lowest atmospheric pressure are January and February (1013.6mbar).
Average wind speed in December
Cannon Rocks, South Africa
- Average wind speed in December: 21.5km/h
The windiest month (with the highest average wind speed) is October (23.7km/h).
The calmest month (with the lowest average wind speed) is May (19.4km/h).
Average humidity in December
Cannon Rocks, South Africa
- Average humidity in December: 78%
The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is June (64%).
Average rainfall in December
Cannon Rocks, South Africa
- Average rainfall in December: 22mm
The wettest month (with the highest rainfall) is June (33mm).
The driest months (with the least rainfall) are September and December (22mm).
Average rainfall days in December
Cannon Rocks, South Africa
- Average rainfall days in December: 14.5 days
The month with the highest number of rainy days is December (14.5 days).
The month with the least rainy days is June (9 days).
Average daylight in December /
Average sunshine in December
Cannon Rocks, 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 42min).
The month with the least sunshine is August (Average sunshine: 6h and 30min).
Average sunshine days in December
Cannon Rocks, South Africa
- Average sunshine days in December: 13.5 days
The months with the most sunshine days are May and June (20 days).
The month with the least sunshine days is December (13.5 days).
Average UV index in December
Cannon Rocks, 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
Cannon Rocks, 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 24).
Average visibility in December
Cannon Rocks, 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).
