September weather forecastShellharbour, Australia
September
Weather in September
September, the first month of the spring in Shellharbour, is still a comfortable month, with an average temperature fluctuating between 11.8°C (53.2°F) and 18.8°C (65.8°F).Temperature
The average high-temperature in September, at a still enjoyable 18.8°C (65.8°F), reveals a modest deviation from August's 16.4°C (61.5°F). Throughout September, an average low-temperature of 11.8°C (53.2°F) is expected.Humidity
The average relative humidity in September is 69%.Rainfall
September is the month with the least rainfall. Rain falls for 11.7 days and accumulates 33mm (1.3") of precipitation.Daylight
In September, the average length of the day is 11h and 52min.On the first day of the month, sunrise is at 6:14 am and sunset at 5:38 pm. On the last day of September, sunrise is at 5:34 am and sunset at 5:58 pm AEST.
Sunshine
In Shellharbour, the average sunshine in September is 8.6h.UV index
May through September, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Guard yourself - Avoiding sunburn is suggested. When the Sun is at its strongest around midday, find shade and limit exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shellharbour, Australia
- Average high temperature in September: 18.8°C
The warmest month (with the highest average high temperature) is January (25.7°C).
The month with the lowest average high temperature is July (15.7°C).
- Average low temperature in September: 11.8°C
The months with the highest average low temperature are January and February (19°C).
The coldest month (with the lowest average low temperature) is July (9.7°C).
Average pressure in September
Shellharbour, Australia
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is June (1020.8mbar).
The month with the lowest atmospheric pressure is January (1012.9mbar).
Average wind speed in September
Shellharbour, Australia
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is August (16.2km/h).
The calmest month (with the lowest average wind speed) is April (13.9km/h).
Average humidity in September
Shellharbour, Australia
- Average humidity in September: 69%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Shellharbour, Australia
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is February (97mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Shellharbour, Australia
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (9.5 days).
Average daylight in September /
Average sunshine in September
Shellharbour, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is November (Average sunshine: 9h and 48min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).
Average sunshine days in September
Shellharbour, Australia
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is August (19.5 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in September
Shellharbour, Australia
- Average UV index in September: 4
The months with the highest UV index are January and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in September
Shellharbour, Australia
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Shellharbour, 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).
