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
Weather in December
Temperature
The ushering in of December brings an average high-temperature of a warm 23.7°C (74.7°F), closely mirroring the 21.2°C (70.2°F) of November. In Grabouw, the December nights cool down to an average low of 15.4°C (59.7°F).Humidity
The months with the lowest humidity in Grabouw are January, February, April and December, with an average relative humidity of 71%.Rainfall
In Grabouw, during December, the rain falls for 7.6 days and regularly aggregates up to 19mm (0.75") of precipitation. Throughout the year, in Grabouw, there are 125.4 rainfall days, and 489mm (19.25") of precipitation is accumulated.Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 05:25 and sunset at 19:41. On the last day of December, in Grabouw, sunrise is at 05:35 and sunset at 19:58 SAST.
Sunshine
The month with the most sunshine in Grabouw is December, with an average of 11.2h of sunshine.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 health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during December morphs into the following directions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
What are December temperatures in Grabouw?
What are the least humid months in Grabouw?
What is the average humidity in December in Grabouw?
How much does it rain in Grabouw in December?
When are the longest days in Grabouw?
What is the average length of the day in December in Grabouw?
When is the sunrise / sunset in December in Grabouw?
What month has the most sunshine in Grabouw?
How many hours of sunshine does Grabouw have in December?
What are the months with the highest UV index in Grabouw?
What is the UV index intensity in December in Grabouw?
Average temperature in December
Grabouw, South Africa
- Average high temperature in December: 23.7°C
The warmest month (with the highest average high temperature) is February (25.4°C).
The month with the lowest average high temperature is August (15.8°C).
- Average low temperature in December: 15.4°C
The month with the highest average low temperature is January (16.7°C).
The coldest month (with the lowest average low temperature) is August (9.3°C).
Average pressure in December
Grabouw, South Africa
- Average pressure in December: 1014.4mbar
The month with the highest atmospheric pressure is July (1022mbar).
The month with the lowest atmospheric pressure is February (1013.5mbar).
Average wind speed in December
Grabouw, South Africa
- Average wind speed in December: 16.7km/h
The windiest month (with the highest average wind speed) is November (17km/h).
The calmest month (with the lowest average wind speed) is May (13.8km/h).
Average humidity in December
Grabouw, South Africa
- Average humidity in December: 71%
The month with the highest relative humidity is September (77%).
The months with the lowest relative humidity are January, February, April and December (71%).
Average rainfall in December
Grabouw, South Africa
- Average rainfall in December: 19mm
The wettest month (with the highest rainfall) is June (105mm).
The driest month (with the least rainfall) is February (10mm).
Average rainfall days in December
Grabouw, South Africa
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is August (14.6 days).
The month with the least rainy days is February (6.4 days).
Average daylight in December /
Average sunshine in December
Grabouw, 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: 11h and 1min
The month with the most sunshine is December (Average sunshine: 11h and 12min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in December
Grabouw, South Africa
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is December (20.2 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in December
Grabouw, 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 May, June, July, August, September and October (UV index 4).
Average cloud cover in December
Grabouw, South Africa
- Average cloud cover in December: 20
The months with the most cloud cover are June and September (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 17).
Average visibility in December
Grabouw, 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).
Grabouw, South Africa
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