Newcastle
Australia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Newcastle, Australia

The first month of the spring, September, is an agreeable month in Newcastle, Australia, with temperature in the range of an average low of 13.2°C (55.8°F) and an average high of 20.1°C (68.2°F).

Temperature

In Newcastle, the average high-temperature is essentially the same as in August - a pleasant 20.1°C (68.2°F). The average low-temperature, in Newcastle, is 13.2°C (55.8°F).

Humidity

August and September, with an average relative humidity of 69%, are the least humid months in Newcastle.

Rainfall

In Newcastle, in September, it is raining for 10.7 days, with typically 45mm (1.77") of accumulated precipitation. In Newcastle, during the entire year, the rain falls for 160.9 days and collects up to 620mm (24.41") of precipitation.

Sea temperature

In Newcastle, Australia, the average seawater temperature is 19.2°C (66.6°F).
Note: For most, swimming in 19.2°C (66.6°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Newcastle, Australia, the average length of the day is 11.9h.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Newcastle, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Newcastle?

In September, in Newcastle, Australia, the average high-temperature is 20.1°C (68.2°F), and the average low-temperature is 13.2°C (55.8°F).

What is the least humid month in Newcastle?

August and September, with an average relative humidity of 69%, are the least humid months in Newcastle, Australia.

What is the average humidity in September in Newcastle?

In Newcastle, the average relative humidity in September is 69%.

How many days does it rain in September in Newcastle?

In Newcastle, Australia, during September, the rain falls for 10.7 days and regularly aggregates up to 45mm (1.77") of precipitation.

How cold is the water in September in Newcastle?

In September, the average sea temperature in Newcastle is 19.2°C (66.6°F). For swimming, a surface water temperature of 19.2°C (66.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Newcastle have in September?

In September, the average length of the day is 11.9h.

How many hours of sunshine does Newcastle have in September?

The average sunshine in September in Newcastle, Australia, is 8.8h.

How high is the UV index in September in Newcastle?

The average daily maximum UV index in September in Newcastle is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Newcastle, Australia
  • Average high temperature in September: 20.1°C

The warmest month (with the highest average high temperature) is January (26.7°C).
The month with the lowest average high temperature is July (16.3°C).

  • Average low temperature in September: 13.2°C

The month with the highest average low temperature is January (20.3°C).
The coldest month (with the lowest average low temperature) is August (10.8°C).

Average humidity in September - Newcastle, Australia
  • Average humidity in September: 69%

The month with the highest relative humidity is February (77%).
Months with the lowest relative humidity are August and September (69%).

Average rainfall in September - Newcastle, Australia
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is February (79mm).
The driest month (with the lowest rainfall) is August (34mm).

Average rainfall days in September - Newcastle, Australia
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is March (15.6 days).
The month with the lowest number of rainy days is August (10.2 days).

Average sea temperature in September - Newcastle, Australia
  • Average sea temperature in September: 19.2°C

The best month for swimming (with the highest average sea temperature) is February (24°C).
The coldest month (with the lowest average sea temperature) is August (18.9°C).

Average daylight in September / Average sunshine in September - Newcastle, Australia
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.3h).
The month with shortest days is June (Average daylight: 10h).

  • Average sunshine in September: 8.8h

Months with most sunshine are November and December (Average sunshine: 9.8h).
The month with least sunshine is June (Average sunshine: 5.8h).

Average UV index in September - Newcastle, Australia
  • Average UV index in September: 5

Months with the highest UV index are January, February, November and December (UV index 6).
Months with the lowest UV index are May, June, July and August (UV index 4).