September weather forecast
Newcastle, Australia

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Weather in September

September in Newcastle brings notable changes in weather conditions, with temperatures rising significantly from August. Rainfall shows signs of increasing, while the daylight hours lengthen, marking the start of Spring. A slow warming trend in sea temperatures sees the return of beachgoers. The wind speed decreases slightly, and the amount of cloudy days also diminishes. With these pleasant changes, the city revives its vibrant, outdoor vibe.

Temperature

As September takes its course, Newcastle's average high-temperature registers at a pleasant 20.1°C (68.2°F), closely aligning with the preceding month. September brings Newcastle a consistent average low-temperature of 13.2°C (55.8°F).

Humidity

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

Rainfall

In Newcastle, in September, during 10.7 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, in Newcastle, there are 160.9 rainfall days, and 620mm (24.41") of precipitation is accumulated.

Sea temperature

In Newcastle, Australia, the average seawater temperature in September is 19.2°C (66.6°F).
Note: 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).

Daylight

The average length of the day in September is 11h and 53min.
On the first day of the month, sunrise is at 6:10 am and sunset at 5:35 pm. On the last day of September, sunrise is at 5:31 am and sunset at 5:54 pm AEST.

Sunshine

In September, the average sunshine in Newcastle is 8.8h.

UV index

In September, the average daily maximum UV index in Newcastle is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What is the temperature in September in Newcastle?

The high-temperature during September is 20.1°C (68.2°F) and the 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.

What is the average humidity in September in Newcastle?

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

How much does it rain in Newcastle in September?

In September, the rain falls for 10.7 days. Throughout September, 45mm (1.77") of precipitation is accumulated.

What is the sea water temperature in September in Newcastle?

In Newcastle, Australia, in September, the average water temperature is 19.2°C (66.6°F). 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).

How many hours of daylight does Newcastle have in September?

The average day length in September is 11h and 53min.

When is the sunrise / sunset in September in Newcastle?

In September, on the first day of the month, sunrise is at 6:10 am and sunset at 5:35 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 5:54 pm AEST.

How long on average sun shines in September in Newcastle?

The average sunshine duration in September is 8.8h.

How high is the UV index in September in Newcastle?

In September, the average daily maximum UV index in Newcastle, Australia, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.

Average temperature in September
Newcastle, Australia

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).

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Average pressure in September
Newcastle, Australia

Average pressure in September - Newcastle, Australia
  • Average pressure in September: 1017.4mbar

The month with the highest atmospheric pressure is June (1020.9mbar).
The month with the lowest atmospheric pressure is January (1012.8mbar).

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Average wind speed in September
Newcastle, Australia

Average wind speed in September - Newcastle, Australia
  • Average wind speed in September: 15.8km/h

The windiest month (with the highest average wind speed) is August (16.7km/h).
The calmest month (with the lowest average wind speed) is April (14.1km/h).

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Average humidity in September
Newcastle, Australia

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

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

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Average rainfall in September
Newcastle, Australia

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 least rainfall) is August (34mm).

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Average rainfall days in September
Newcastle, Australia

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 least rainy days is August (10.2 days).

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Average sea temperature in September
Newcastle, Australia

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).

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Average daylight in September /
Average sunshine in September
Newcastle, Australia

Average daylight in September / Average sunshine in September - Newcastle, Australia
  • Average daylight in September: 11h and 5min

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 September: 8h and 5min

The months with the most sunshine are November and December (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).

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Average sunshine days in September
Newcastle, Australia

Average sunshine days in September - Newcastle, Australia
  • Average sunshine days in September: 17.7 days

The month with the most sunshine days is August (18.3 days).
The month with the least sunshine days is February (12.4 days).

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Average UV index in September
Newcastle, Australia

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

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

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Average cloud cover in September
Newcastle, Australia

Average cloud cover in September - Newcastle, Australia
  • Average cloud cover in September: 24

The month with the most cloud cover is February (Cloud cover 39).
The months with the least cloud cover are August and September (Cloud cover 24).

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Average visibility in September
Newcastle, Australia

Average visibility in September - Newcastle, Australia
  • Average visibility in September: 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).

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Newcastle, Australia

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