December weather forecastPenrith, Australia
December
Weather in December
December, the first month of the summer in Penrith, is still a warm month, with an average temperature fluctuating between 28.2°C (82.8°F) and 15.8°C (60.4°F).Temperature
December denotes a minimal variation in the average high-temperature to a still moderately hot 28.2°C (82.8°F) from November's 26.4°C (79.5°F). Penrith's December nights cool down significantly from the day's heat, to an average low-temperature of 15.8°C (60.4°F).Heat index
In December, the average heat index is computed to be a tropical 31°C (87.8°F). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
The average relative humidity in December is 68%.Rainfall
In Penrith, during December, the rain falls for 12.4 days and regularly aggregates up to 34mm (1.34") of precipitation. In Penrith, during the entire year, the rain falls for 137.7 days and collects up to 501mm (19.72") of precipitation.Daylight
December has the longest days of the year in Penrith, with an average of 14h and 24min of daylight.On the first day of December, sunrise is at 5:39 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:11 pm AEDT.
Sunshine
The months with the most sunshine are November and December, with an average of 9.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 6, are months with the highest UV index in Penrith, Australia. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 6 translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Penrith, Australia
- Average high temperature in December: 28.2°C
The warmest month (with the highest average high temperature) is January (29.6°C).
The month with the lowest average high temperature is June (16°C).
- Average low temperature in December: 15.8°C
The month with the highest average low temperature is January (17.4°C).
The coldest month (with the lowest average low temperature) is July (6.3°C).
Average pressure in December
Penrith, Australia
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is June (1021.2mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).
Average wind speed in December
Penrith, Australia
- Average wind speed in December: 8km/h
The windiest month (with the highest average wind speed) is September (8.3km/h).
The calmest month (with the lowest average wind speed) is April (7km/h).
Average humidity in December
Penrith, Australia
- Average humidity in December: 68%
The month with the highest relative humidity is June (78%).
The month with the lowest relative humidity is September (66%).
Average rainfall in December
Penrith, Australia
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is February (101mm).
The driest month (with the least rainfall) is May (22mm).
Average rainfall days in December
Penrith, Australia
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (6.7 days).
Average daylight in December /
Average sunshine in December
Penrith, Australia
- Average daylight in December: 14h and 24min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in December: 9h and 48min
The months with the most sunshine are November and December (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in December
Penrith, Australia
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is August (22.7 days).
The month with the least sunshine days is February (10 days).
Average UV index in December
Penrith, 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 April, May, June, July, August and September (UV index 4).
Average cloud cover in December
Penrith, Australia
- Average cloud cover in December: 38
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Penrith, Australia
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
