December weather forecastLong Jetty, Australia
December
Weather in December
The first month of the summer, December, is still a warm month in Long Jetty, Australia, with an average temperature fluctuating between 25.9°C (78.6°F) and 18.1°C (64.6°F).Temperature
As December takes hold, the average high-temperature is a still moderately hot 25.9°C (78.6°F), nearly mirroring that of the previous month. Long Jetty records an average nighttime low-temperature of 18.1°C (64.6°F) throughout December.Humidity
In December, the average relative humidity in Long Jetty is 73%.Rainfall
In Long Jetty, in December, during 13.6 rainfall days, 39mm (1.54") of precipitation is typically accumulated. In Long Jetty, during the entire year, the rain falls for 156.9 days and collects up to 628mm (24.72") of precipitation.Sea temperature
In Long Jetty, Australia, in December, the average water temperature is 22.3°C (72.1°F).Note: Consideration of an individual's cold resistance, combined with conditions like sunshine, wind, and temperature, suggests that swimming in 22.3°C (72.1°F) water can be delightful. (Olympic swimming is usually in 25°C (77°F) to 28°C (82.4°F) water.)
Daylight
With an average of 14h and 18min of daylight, December has the longest days of the year.On the first day of December in Long Jetty, sunrise is at 5:37 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:06 pm AEDT.
Sunshine
In December, the average sunshine in Long Jetty is 9.7h.UV index
The months with the highest UV index are January, February, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 6 during December leads to these instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Enhance your sun protection with tightly woven, yet airy clothing. Caution! The Sun's UV intensity grows with reflections off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Long Jetty, Australia
- Average high temperature in December: 25.9°C
The warmest month (with the highest average high temperature) is January (27°C).
The month with the lowest average high temperature is July (16.5°C).
- Average low temperature in December: 18.1°C
The month with the highest average low temperature is January (19.8°C).
The coldest month (with the lowest average low temperature) is July (9.8°C).
Average pressure in December
Long Jetty, Australia
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is June (1021mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).
Average wind speed in December
Long Jetty, Australia
- Average wind speed in December: 13.2km/h
The windiest month (with the highest average wind speed) is August (13.6km/h).
The calmest month (with the lowest average wind speed) is April (12km/h).
Average humidity in December
Long Jetty, Australia
- Average humidity in December: 73%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Long Jetty, Australia
- Average rainfall in December: 39mm
The wettest month (with the highest rainfall) is February (100mm).
The driest month (with the least rainfall) is August (34mm).
Average rainfall days in December
Long Jetty, Australia
- Average rainfall days in December: 13.6 days
The month with the highest number of rainy days is March (16.5 days).
The month with the least rainy days is August (9.2 days).
Average sea temperature in December
Long Jetty, Australia
- Average sea temperature in December: 22.3°C
The best month for swimming (with the highest average sea temperature) is February (23.8°C).
The coldest months (with the lowest average sea temperature) are August and September (18.8°C).
Average daylight in December /
Average sunshine in December
Long Jetty, 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 42min
The month with the most sunshine is November (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).
Average sunshine days in December
Long Jetty, Australia
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is August (20 days).
The month with the least sunshine days is February (10.6 days).
Average UV index in December
Long Jetty, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in December
Long Jetty, Australia
- Average cloud cover in December: 36
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Long Jetty, Australia
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
