December weather forecast
Blackheath, Australia

Weather in December

The first month of the summer, December, is still a warm month in Blackheath, Australia, with temperature in the range of an average low of 13.7°C (56.7°F) and an average high of 26.8°C (80.2°F).

Temperature

In Blackheath, the average high-temperature is relatively the same as in November - a still warm 26.8°C (80.2°F). In Blackheath, Australia, in December, the average low-temperature is 13.7°C (56.7°F).

Humidity

December is the least humid month, with an average relative humidity of 68%.

Rainfall

In Blackheath, during December, the rain falls for 14.5 days and regularly aggregates up to 49mm (1.93") of precipitation. Throughout the year, there are 157.9 rainfall days, and 569mm (22.4") of precipitation is accumulated.

Daylight

With an average of 14.4h of daylight, December has the longest days of the year.

Sunshine

Months with the most sunshine in Blackheath are November and December, with an average of 10.1h of sunshine.

UV index

Months with the highest UV index are January and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for average individuals.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the least humid month in Blackheath?

With an average relative humidity of 68%, December is the least humid month.

What is the average humidity in December in Blackheath?

In December, the average relative humidity is 68%.

How many days does it rain in December in Blackheath?

In Blackheath, in December, during 14.5 rainfall days, 49mm (1.93") of precipitation is typically accumulated.

When are the longest days in Blackheath?

December has the longest days of the year in Blackheath, Australia, with an average of 14.4h of daylight.

What is the average length of the day in December in Blackheath?

The average length of the day in December in Blackheath, Australia, is 14.4h.

What is the month with the most sunshine in Blackheath?

Months with the most sunshine in Blackheath, Australia, are November and December, with an average of 10.1h of sunshine.

How long on average sun shines in December in Blackheath?

In Blackheath, the average sunshine in December is 10.1h.

When is the highest UV index in Blackheath?

Months with the highest UV index in Blackheath, Australia, are January and December, with an average maximum UV index of 6.

What is the UV index intensity in December in Blackheath?

The average daily maximum UV index in December in Blackheath, Australia, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.

Average temperature in December
Blackheath, Australia

Average temperature in December - Blackheath, Australia
  • Average high temperature in December: 26.8°C

The warmest month (with the highest average high temperature) is January (28.6°C).
The months with the lowest average high temperature are June and July (13.7°C).

  • Average low temperature in December: 13.7°C

The month with the highest average low temperature is January (15.4°C).
The coldest month (with the lowest average low temperature) is July (3.3°C).

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Average pressure in December
Blackheath, Australia

Average pressure in December - Blackheath, Australia
  • Average pressure in December: 1013.2mbar

The month with the highest atmospheric pressure is June (1021.6mbar).
The month with the lowest atmospheric pressure is January (1012.7mbar).

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Average wind speed in December
Blackheath, Australia

Average wind speed in December - Blackheath, Australia
  • Average wind speed in December: 6.9km/h

The windiest month (with the highest average wind speed) is August (8.6km/h).
The calmest months (with the lowest average wind speed) are March and April (6.3km/h).

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Average humidity in December
Blackheath, Australia

Average humidity in December - Blackheath, Australia
  • Average humidity in December: 68%

The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is December (68%).

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Average rainfall in December
Blackheath, Australia

Average rainfall in December - Blackheath, Australia
  • Average rainfall in December: 49mm

The wettest month (with the highest rainfall) is February (109mm).
The driest month (with the least rainfall) is May (22mm).

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Average rainfall days in December
Blackheath, Australia

Average rainfall days in December - Blackheath, Australia
  • Average rainfall days in December: 14.5 days

The month with the highest number of rainy days is March (17.7 days).
The months with the least rainy days are July and August (8.9 days).

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

Average daylight in December / Average sunshine in December - Blackheath, Australia
  • Average daylight in December: 14.4h

The month with the longest days is December (Average daylight: 14.4h).
The month with the shortest days is June (Average daylight: 9.9h).

  • Average sunshine in December: 10.1h

The months with the most sunshine are November and December (Average sunshine: 10.1h).
The month with the least sunshine is June (Average sunshine: 5.8h).

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Average sunshine days in December
Blackheath, Australia

Average sunshine days in December - Blackheath, Australia
  • Average sunshine days in December: 13.8 days

The month with the most sunshine days is May (19 days).
The month with the least sunshine days is February (8.9 days).

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Average UV index in December
Blackheath, Australia

Average UV index in December - Blackheath, Australia
  • Average UV index in December: 6

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

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Average cloud cover in December
Blackheath, Australia

Average cloud cover in December - Blackheath, Australia
  • Average cloud cover in December: 39

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in December
Blackheath, Australia

Average visibility in December - Blackheath, Australia
  • Average visibility in December: 8km

The months with the highest visibility are January, February, May, June, July, August, September, October, November and December (8km).
The months with the lowest visibility are March and April (7km).

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