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
Weather in December
Temperature
The shift into December uncovers an average high-temperature of a still warm 27.8°C (82°F), subtly different from the previous month. Significant dips from daytime highs mark the December nights in Clanwilliam, South Africa, with a consistent average temperature of 15.5°C (59.9°F).Heat index
The heat index for December is evaluated at 27°C (80.6°F). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In December, the average relative humidity in Clanwilliam is 40%.Rainfall
In Clanwilliam, in December, it is raining for 4.4 days, with typically 13mm (0.51") of accumulated precipitation. Throughout the year, there are 54.8 rainfall days, and 114mm (4.49") of precipitation is accumulated.Snowfall
January through May, September through December are months without snowfall in Clanwilliam, South Africa.Daylight
With an average of 14h and 12min of daylight, December has the longest days of the year.On the first day of December in Clanwilliam, sunrise is at 05:30 and sunset at 19:36. On the last day of the month, sunrise is at 05:40 and sunset at 19:54 SAST.
Sunshine
December has the most sunshine of the year in Clanwilliam, with an average of 11.9h of sunshine.UV index
With an average maximum UV index of 7, December is the month with the highest UV index in Clanwilliam. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum UV index of 7 in December translates into the following recommendations:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What is the temperature in December in Clanwilliam?
What is the average humidity in December in Clanwilliam?
How much does it rain in Clanwilliam in December?
When it does not snow in Clanwilliam?
When are the longest days in Clanwilliam?
What is the average length of the day in December in Clanwilliam?
What time are sunrise and sunset in December in Clanwilliam?
What month has the most sunshine in Clanwilliam?
How many hours of sunshine does Clanwilliam have in December?
When is the highest UV index in Clanwilliam?
What is the UV index intensity in December in Clanwilliam?
Average temperature in December
Clanwilliam, South Africa
- Average high temperature in December: 27.8°C
The warmest month (with the highest average high temperature) is January (29.7°C).
The months with the lowest average high temperature are June and July (15.1°C).
- Average low temperature in December: 15.5°C
The month with the highest average low temperature is February (17.7°C).
The coldest month (with the lowest average low temperature) is July (5.7°C).
Average pressure in December
Clanwilliam, South Africa
- Average pressure in December: 1012.2mbar
The month with the highest atmospheric pressure is July (1023mbar).
The month with the lowest atmospheric pressure is January (1011.6mbar).
Average wind speed in December
Clanwilliam, South Africa
- Average wind speed in December: 13.8km/h
The windiest month (with the highest average wind speed) is November (14.3km/h).
The calmest month (with the lowest average wind speed) is May (11.5km/h).
Average humidity in December
Clanwilliam, South Africa
- Average humidity in December: 40%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (38%).
Average rainfall in December
Clanwilliam, South Africa
- Average rainfall in December: 13mm
The wettest month (with the highest rainfall) is June (15mm).
The driest month (with the least rainfall) is September (4mm).
Average rainfall days in December
Clanwilliam, South Africa
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is June (6.4 days).
The month with the least rainy days is November (2.8 days).
Average snowfall in December
Clanwilliam, South Africa
- Average snowfall in December: 0mm
The month with the highest snowfall is August (3mm).
The months with the least snowfall are January, February, March, April, May, September, October, November and December (0mm).
Average snowfall days in December
Clanwilliam, South Africa
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is August (0.5 days).
The months with the least snowfall days are January, February, March, April, May, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Clanwilliam, South Africa
- Average daylight in December: 14h and 1min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
- Average sunshine in December: 11h and 5min
The month with the most sunshine is December (Average sunshine: 11h and 54min).
The month with the least sunshine is June (Average sunshine: 6h and 36min).
Average sunshine days in December
Clanwilliam, South Africa
- Average sunshine days in December: 25.9 days
The month with the most sunshine days is March (26.2 days).
The month with the least sunshine days is February (22.9 days).
Average UV index in December
Clanwilliam, South Africa
- Average UV index in December: 7
The month with the highest UV index is December (UV index 7).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in December
Clanwilliam, South Africa
- Average cloud cover in December: 10
The month with the most cloud cover is June (Cloud cover 26).
The months with the least cloud cover are January and February (Cloud cover 8).
Average visibility in December
Clanwilliam, 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).
Clanwilliam, South Africa
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