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
The advent of December brings an average high-temperature of a moderately hot 24.3°C (75.7°F), exhibiting minor difference from the previous month. December sees the temperature falling to a mean low of 16.3°C (61.3°F).Humidity
The months with the lowest humidity are February, April and December, with an average relative humidity of 68%.Rainfall
In Grassy Park, during December, the rain falls for 6.4 days and regularly aggregates up to 16mm (0.63") of precipitation. Throughout the year, there are 111 rainfall days, and 435mm (17.13") of precipitation is accumulated.Daylight
December has the longest days of the year, with an average of 14h and 24min of daylight.On the first day of the month, sunrise is at 05:27 and sunset at 19:42. On the last day of December, in Grassy Park, sunrise is at 05:37 and sunset at 20:00 SAST.
Sunshine
The month with the most sunshine is December, with an average of 11.1h of sunshine.UV index
The months with the highest UV index in Grassy Park are January, February and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Grassy Park?
What is the least humid month in Grassy Park?
What is the average humidity in December in Grassy Park?
How much does it rain in Grassy Park in December?
When are the longest days in Grassy Park?
How many hours of daylight does Grassy Park have in December?
What time are sunrise and sunset in December in Grassy Park?
What month has the most sunshine in Grassy Park?
How many hours of sunshine does Grassy Park have in December?
What are the months with the highest UV index in Grassy Park?
How high is the UV index in December in Grassy Park?
Average temperature in December
Grassy Park, South Africa
- Average high temperature in December: 24.3°C
The warmest month (with the highest average high temperature) is February (26.1°C).
The month with the lowest average high temperature is August (16.6°C).
- Average low temperature in December: 16.3°C
The month with the highest average low temperature is January (17.7°C).
The coldest months (with the lowest average low temperature) are July and August (10.2°C).
Average pressure in December
Grassy Park, South Africa
- Average pressure in December: 1014.3mbar
The month with the highest atmospheric pressure is July (1022mbar).
The month with the lowest atmospheric pressure is February (1013.4mbar).
Average wind speed in December
Grassy Park, South Africa
- Average wind speed in December: 17.3km/h
The windiest month (with the highest average wind speed) is January (17.6km/h).
The calmest month (with the lowest average wind speed) is May (13.4km/h).
Average humidity in December
Grassy Park, South Africa
- Average humidity in December: 68%
The months with the highest relative humidity are June, August and September (74%).
The months with the lowest relative humidity are February, April and December (68%).
Average rainfall in December
Grassy Park, South Africa
- Average rainfall in December: 16mm
The wettest month (with the highest rainfall) is June (98mm).
The driest month (with the least rainfall) is February (7mm).
Average rainfall days in December
Grassy Park, South Africa
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (4.9 days).
Average daylight in December /
Average sunshine in December
Grassy Park, 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 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in December
Grassy Park, South Africa
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is June (14.6 days).
Average UV index in December
Grassy Park, 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 and September (UV index 4).
Average cloud cover in December
Grassy Park, South Africa
- Average cloud cover in December: 19
The month with the most cloud cover is June (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 15).
Average visibility in December
Grassy Park, 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).
