September weather forecastNewcastle, Australia
September
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 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).
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).
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%).
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).
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).
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: 11h and 54min
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 48min
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).
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).
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).
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).
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).
