December weather forecast and climate
Katoomba, Australia

December, the first month of the summer, in Katoomba, is also a moderately hot month, with average temperature ranging between min 13.7°C (56.7°F) and max 26.8°C (80.2°F).

Temperature

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

Humidity

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

Rainfall

In Katoomba, during December, the rain falls for 14.5 days and regularly aggregates up to 49mm (1.93") of precipitation. In Katoomba, during the entire year, the rain falls for 157.9 days and collects up to 569mm (22.4") of precipitation.

Daylight

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

Sunshine

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

UV index

January 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 vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Katoomba?

In Katoomba, Australia, in December, the average high-temperature is 26.8°C (80.2°F), and the average low-temperature is 13.7°C (56.7°F).

What is the least humid month in Katoomba?

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

What is the average humidity in December in Katoomba?

The average relative humidity in December is 68%.

How many days does it rain in December in Katoomba?

In December, in Katoomba, Australia, the rain falls for 14.5 days. Throughout December, 49mm (1.93") of precipitation is accumulated.

When are the longest days in Katoomba?

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

How many hours of daylight does Katoomba have in December?

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

What is the month with the most sunshine in Katoomba?

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

How many hours of sunshine does Katoomba have in December?

The average sunshine in December in Katoomba, Australia, is 10.1h.

When is the highest UV index in Katoomba?

January and December, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in December in Katoomba?

In December, the average daily maximum UV index in Katoomba, Australia, is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in December - Katoomba, Australia
  • Average high temperature in December: 26.8°C

The warmest month (with the highest average high temperature) is January (28.6°C).
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).

Average pressure in December - Katoomba, 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).

Average wind speed in December - Katoomba, 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).

Average humidity in December - Katoomba, 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%).

Average rainfall in December - Katoomba, 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).

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

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

Average daylight in December / Average sunshine in December - Katoomba, 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

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).

Average sunshine days in December - Katoomba, 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).

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

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

Average cloud cover in December - Katoomba, 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).

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

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