December weather forecastManly, Australia
December
Weather in December
December, the first month of the summer in Manly, is also a moderately hot month, with an average temperature fluctuating between 18.5°C (65.3°F) and 24.8°C (76.6°F).Temperature
Manly, Australia, indicates an average high-temperature of a still warm 24.8°C (76.6°F) in December, showing minor variation from November's 23.5°C (74.3°F). December nights experience a consistent temperature drop to a comfortable 18.5°C (65.3°F).Humidity
The average relative humidity in December is 73%.Rainfall
In Manly, during December, the rain falls for 13 days and regularly aggregates up to 42mm (1.65") of precipitation. Throughout the year, in Manly, there are 152.6 rainfall days, and 635mm (25") of precipitation is accumulated.Sea temperature
In Manly, Australia, in December, the average water temperature is 21.9°C (71.4°F).Note: Swimming is not a pleasant activity for most when the water temperature is 21.9°C (71.4°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.
Daylight
With an average of 14h and 24min of daylight, December has the longest days of the year in Manly, Australia.On the first day of the month, sunrise is at 5:37 am and sunset at 7:50 pm. On the last day of December, sunrise is at 5:46 am and sunset at 8:08 pm AEDT.
Sunshine
In Manly, the average sunshine in December is 9.9h.UV index
January, February 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 unsafe exposure to UV radiation for the ordinary person.Note: In December, a daily UV index of 6 turns into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. 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. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Warning! Sand and water reflections boost the intensity of UV exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Manly, Australia
- Average high temperature in December: 24.8°C
The warmest month (with the highest average high temperature) is January (26.2°C).
The month with the lowest average high temperature is July (16.4°C).
- Average low temperature in December: 18.5°C
The month with the highest average low temperature is January (20.3°C).
The coldest months (with the lowest average low temperature) are July and August (10.9°C).
Average pressure in December
Manly, Australia
- Average pressure in December: 1013.4mbar
The month with the highest atmospheric pressure is June (1020.8mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in December
Manly, Australia
- Average wind speed in December: 16.5km/h
The windiest month (with the highest average wind speed) is August (16.8km/h).
The calmest month (with the lowest average wind speed) is April (14.6km/h).
Average humidity in December
Manly, Australia
- Average humidity in December: 73%
The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Manly, Australia
- Average rainfall in December: 42mm
The wettest month (with the highest rainfall) is February (95mm).
The driest month (with the least rainfall) is September (32mm).
Average rainfall days in December
Manly, Australia
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is September (8.7 days).
Average sea temperature in December
Manly, Australia
- Average sea temperature in December: 21.9°C
The best month for swimming (with the highest average sea temperature) is February (23.7°C).
The coldest month (with the lowest average sea temperature) is September (18.6°C).
Average daylight in December /
Average sunshine in December
Manly, 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 54min
The month with the most sunshine is November (Average sunshine: 10h and 0min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in December
Manly, Australia
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is August (20.4 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in December
Manly, Australia
- Average UV index in December: 6
The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are June, July, August and September (UV index 4).
Average cloud cover in December
Manly, 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
Manly, 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).
