September
Weather in September
Temperature
In September, Rottnest Island experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 18°C (64.4°F) in August to a still refreshing 18.9°C (66°F). Rottnest Island's average low-temperature during September nights is observed to be a cool 12.9°C (55.2°F).Humidity
July through September, with an average relative humidity of 64%, are the most humid months in Rottnest Island.Rainfall
In Rottnest Island, during September, the rain falls for 13.4 days and regularly aggregates up to 54mm (2.13") of precipitation. Throughout the year, there are 106.1 rainfall days, and 560mm (22.05") of precipitation is accumulated.Daylight
The average length of the day in September is 11h and 54min.On the first day of the month, sunrise is at 6:34 am and sunset at 6:01 pm. On the last day of September, sunrise is at 5:56 am and sunset at 6:19 pm AWST.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Rottnest Island?
What is the most humid month in Rottnest Island?
What is the average humidity in September in Rottnest Island?
How much does it rain in Rottnest Island in September?
What is the average length of the day in September in Rottnest Island?
When is the sunrise / sunset in September in Rottnest Island?
Average temperature in September
Rottnest Island, Australia
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is February (27.4°C).
The month with the lowest average high temperature is July (17.7°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is February (19.5°C).
The coldest month (with the lowest average low temperature) is July (12.3°C).
Average humidity in September
Rottnest Island, Australia
- Average humidity in September: 64%
The months with the highest relative humidity are July, August and September (64%).
The months with the lowest relative humidity are March and May (60%).
Average rainfall in September
Rottnest Island, Australia
- Average rainfall in September: 53.8mm
The wettest month (with the highest rainfall) is July (114.2mm).
The driest month (with the least rainfall) is February (7.3mm).
Average rainfall days in September
Rottnest Island, Australia
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (1.8 days).
Average daylight in September
Rottnest Island, Australia
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).
