December weather forecastWhyalla, Australia
December
Weather in December
The first month of the summer, December, is also a moderately hot month in Whyalla, Australia, with temperature in the range of an average high of 27.5°C (81.5°F) and an average low of 19.1°C (66.4°F).Temperature
As November transitions into December, Whyalla records an average high-temperature of a still warm 27.5°C (81.5°F), showing a gentle shift from the preceding month. December nights in Whyalla are marked by an average temperature drop to a comfortable 19.1°C (66.4°F).Heat index
In December, the heat index is evaluated at 28°C (82.4°F). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
The months with the lowest humidity in Whyalla, Australia, are January and December, with an average relative humidity of 50%.Rainfall
In Whyalla, during December, the rain falls for 6.8 days and regularly aggregates up to 17mm (0.67") of precipitation. Throughout the year, in Whyalla, there are 83.5 rainfall days, and 201mm (7.91") of precipitation is accumulated.Daylight
The month with the longest days is December, with an average of 14h and 18min of daylight.On the first day of December, sunrise is at 6:03 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:31 pm ACDT.
Sunshine
In December, the average sunshine is 9h.UV index
The month with the highest UV index is December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 7 suggests these recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Whyalla, Australia
- Average high temperature in December: 27.5°C
The warmest month (with the highest average high temperature) is January (29.6°C).
The months with the lowest average high temperature are June and July (16.5°C).
- Average low temperature in December: 19.1°C
The month with the highest average low temperature is January (20.5°C).
The coldest month (with the lowest average low temperature) is July (10.1°C).
Average pressure in December
Whyalla, Australia
- Average pressure in December: 1012.6mbar
The month with the highest atmospheric pressure is June (1022.7mbar).
The month with the lowest atmospheric pressure is January (1011.6mbar).
Average wind speed in December
Whyalla, Australia
- Average wind speed in December: 21.1km/h
The windiest month (with the highest average wind speed) is January (21.6km/h).
The calmest month (with the lowest average wind speed) is April (16.4km/h).
Average humidity in December
Whyalla, Australia
- Average humidity in December: 50%
The month with the highest relative humidity is June (65%).
The months with the lowest relative humidity are January and December (50%).
Average rainfall in December
Whyalla, Australia
- Average rainfall in December: 17mm
The wettest month (with the highest rainfall) is November (22mm).
The driest months (with the least rainfall) are March and July (12mm).
Average rainfall days in December
Whyalla, Australia
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is August (8.9 days).
The month with the least rainy days is February (4.8 days).
Average daylight in December /
Average sunshine in December
Whyalla, Australia
- Average daylight in December: 14h and 18min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in December: 9h and 0min
The month with the most sunshine is January (Average sunshine: 9h and 12min).
The months with the least sunshine are May and August (Average sunshine: 7h and 42min).
Average sunshine days in December
Whyalla, Australia
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is August (19 days).
Average UV index in December
Whyalla, Australia
- 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 and August (UV index 4).
Average cloud cover in December
Whyalla, Australia
- Average cloud cover in December: 20
The month with the most cloud cover is June (Cloud cover 33).
The month with the least cloud cover is January (Cloud cover 17).
Average visibility in December
Whyalla, Australia
- 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).
