December weather forecastMannum, Australia

December

Weather in December

The first month of the summer, December, is still a warm month in Mannum, Australia, with temperature in the range of an average low of 15.2°C (59.4°F) and an average high of 27.6°C (81.7°F).

Temperature

Mannum experiences a minor change to a still moderately hot 27.6°C (81.7°F) in average high-temperature during December, closely reflecting November. In December, the temperature in Mannum registers a significant dip to an average of 15.2°C (59.4°F) at night.

Heat index

The heat index value during December is appraised at 28°C (82.4°F). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.

Humidity

In December, the average relative humidity in Mannum, Australia, is 53%.

Rainfall

In December, in Mannum, Australia, the rain falls for 8.2 days. Throughout December, 18mm (0.71") of precipitation is accumulated. Throughout the year, in Mannum, there are 112.2 rainfall days, and 219mm (8.62") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 14h and 30min of daylight.
On the first day of the month, sunrise is at 5:52 am and sunset at 8:11 pm. On the last day of December, sunrise is at 6:01 am and sunset at 8:29 pm ACDT.

Sunshine

With an average of 10.5h of sunshine, December has the most sunshine of the year in Mannum.

UV index

January, February, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 6 in December transforms into this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature in Mannum, Australia, during December is 27.6°C (81.7°F) and the low-temperature is 15.2°C (59.4°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in December is appraised at 28°C (82.4°F).

The average relative humidity in December is 53%.

In Mannum, Australia, during December, the rain falls for 8.2 days and regularly aggregates up to 18mm (0.71") of precipitation.

December has the longest days of the year in Mannum, Australia, with an average of 14h and 30min of daylight.

In December, the average day length in Mannum is 14h and 28min.

On the first day of December in Mannum, Australia, sunrise is at 5:52 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:29 pm ACDT.

The month with the most sunshine is December, with an average of 10.5h of sunshine.

In Mannum, the average sunshine duration in December is 10.5h.

The months with the highest UV index in Mannum are January, February, November and December, with an average maximum UV index of 6.

The average daily maximum UV index in December in Mannum is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

25.2°C

27.6°C

29.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

14.2km/h

14.3km/h

13.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

20.5

20.4

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Mannum, Australia

Average high temperature in December: 27.6°C

The warmest month (with the highest average high temperature) is January (29.6°C).
The month with the lowest average high temperature is July (14.6°C).

Average low temperature in December: 15.2°C

The month with the highest average low temperature is January (16.8°C).
The coldest month (with the lowest average low temperature) is August (6.7°C).

Average pressure in December
Mannum, Australia

Average pressure in December: 1012.9mbar

The month with the highest atmospheric pressure is June (1021.8mbar).
The month with the lowest atmospheric pressure is January (1012.2mbar).

Average wind speed in December
Mannum, Australia

Average wind speed in December: 12.7km/h

The windiest month (with the highest average wind speed) is August (13km/h).
The calmest month (with the lowest average wind speed) is April (10.1km/h).

Average humidity in December
Mannum, Australia

Average humidity in December: 53%

The month with the highest relative humidity is July (76%).
The month with the lowest relative humidity is January (51%).

Average rainfall in December
Mannum, Australia

Average rainfall in December: 18mm

The wettest month (with the highest rainfall) is May (26mm).
The driest month (with the least rainfall) is March (12mm).

Average rainfall days in December
Mannum, Australia

Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is July (13.9 days).
The months with the least rainy days are January and February (5.8 days).

Average daylight in December /
Average sunshine in December
Mannum, Australia

Average daylight in December: 14h and 30min

The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 54min).

Average sunshine in December: 10h and 30min

The month with the most sunshine is December (Average sunshine: 10h and 30min).
The month with the least sunshine is August (Average sunshine: 7h and 6min).

Average sunshine days in December
Mannum, Australia

Average sunshine days in December: 20.4 days

The month with the most sunshine days is January (23 days).
The month with the least sunshine days is July (14.2 days).

Average UV index in December
Mannum, Australia

Average UV index in December: 6

The months with the highest UV index are January, February, November and December (UV index 6).
The months with the lowest UV index are June and July (UV index 3).

Average cloud cover in December
Mannum, Australia

Average cloud cover in December: 24

The months with the most cloud cover are May, July and August (Cloud cover 40).
The month with the least cloud cover is January (Cloud cover 20).

Average visibility in December
Mannum, Australia

Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).