December weather forecastSouth Johnstone, Australia

Weather in December

December, the first month of the summer in South Johnstone, is also a hot month, with an average temperature ranging between min 19.6°C (67.3°F) and max 30.3°C (86.5°F).

Temperature

South Johnstone's December weather, with an average high temperature of 30.3°C (86.5°F) and an average low temperature of 19.6°C (67.3°F), tends to be the warmest of the year.

Heat index

The heat index value during December is appraised at a sweltering 37°C (98.6°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In South Johnstone, the average relative humidity in December is 76%.

Rainfall

In South Johnstone, in December, during 17.4 rainfall days, 100mm (3.94") of precipitation is typically accumulated. Throughout the year, in South Johnstone, there are 162.7 rainfall days, and 659mm (25.94") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 13h and 12min of daylight.
On the first day of the month, sunrise is at 5:31 am and sunset at 6:38 pm. On the last day of December, in South Johnstone, sunrise is at 5:44 am and sunset at 6:54 pm AEST.

Sunshine

In South Johnstone, the average sunshine in December is 9.7h.

UV index

The months with the highest UV index in South Johnstone are January through March, September through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, an average UV index of 6 transforms into the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.