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
Calvinia, South Africa, starts December with an average high-temperature of a still moderately hot 27.8°C (82°F), hinting at a minimal fluctuation from November. A sharp reduction from the daytime highs is witnessed during December, with nighttime temperatures averaging a low of 15.5°C (59.9°F).Heat index
December's mean heat index is appraised at 27°C (80.6°F). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.The metrics for the heat index are tailored for both shady environments and light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In December, the average relative humidity in Calvinia, South Africa, is 40%.Rainfall
In Calvinia, South Africa, in December, during 4.4 rainfall days, 13mm (0.51") of precipitation is typically accumulated. Throughout the year, in Calvinia, 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.Daylight
December has the longest days of the year in Calvinia, with an average of 14h and 12min of daylight.On the first day of the month, sunrise is at 05:28 and sunset at 19:31. On the last day of December, in Calvinia, sunrise is at 05:39 and sunset at 19:48 SAST.
Sunshine
The month with the most sunshine is December, with an average of 11.9h of sunshine.UV index
December is the month with the highest UV index in Calvinia, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 7 translates into these guidelines:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What are December temperatures in Calvinia?
What is the average humidity in December in Calvinia?
How many days does it rain in December in Calvinia?
When it does not snow in Calvinia?
When are the longest days in Calvinia?
How many hours of daylight does Calvinia have in December?
When is the sunrise / sunset in December in Calvinia?
What month has the most sunshine in Calvinia?
How many hours of sunshine does Calvinia have in December?
What is the month with the highest UV index in Calvinia?
What is the UV index intensity in December in Calvinia?
Average temperature in December
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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
Calvinia, 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).
Calvinia, South Africa
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