Normal weather for Rottnest Island in September
It's pleasantly warm in September in Rottnest Island with an average temperature of 20°C. Temperatures this month range from a low of 18°C to a high of 23°C. At night, you can expect temperatures between 9°C and 13°C.
In September, there is an average of 38 mm of precipitation, spread over 8 days. The wind speed is around 5 Bft, mostly coming from the South.
Rottnest Island in September |
New York | ||
|---|---|---|---|
 Average Temperature |
20°C | 27°C | |
 High Temp |
23°C | 31°C | |
| Low Temp |
18°C | 21°C | |
 Total Precipitation |
38 mm | 57 mm | |
| Rainy Days |
8 days | 9 days | |
Start of September
The month of September starts in Rottnest Island with mild temps, averaging around 20°C during the day and nights around 11°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid September
By mid-September, daytime temps rise to around 21°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
End of September
By the end of September, the average daytime temperature in Rottnest Island is around 22°C, while nighttime temps are about 12°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Rottnest Island?
Looking for great weather? September is a good time to be in Rottnest Island. The temperatures are nice, and there’s not too much rain.
Temperature records for Rottnest Island in September
Check out the climate of Rottnest Island for all months and discover the best travel time
Curious about the weather in other parts of Australia? Check out the climate and weather for spots like Sydney, Gold Coast, Melbourne, or explore other destinations in Australia.
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Daily Temperature in September in Rottnest Island
This chart shows the average daily high and low temperatures in September for Rottnest Island, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Rottnest Island
The chart below shows the average daily precipitation in September for Rottnest Island, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 8 days of precipitation in Rottnest Island.
Daily UV Index in September in Rottnest Island
This chart shows the average daily UV index in September in Rottnest Island, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Rottnest Island Over the Years
This chart shows the average temperature in September in Rottnest Island, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Rottnest Island Over the Years
This chart shows the average precipitation in September in Rottnest Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Rottnest Island
Click on any day in September to get detailed info about the usual weather on that day in Rottnest Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Rottnest Island
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Average Weather in Rottnest Island by Month
Click on a month below to see detailed weather info for Rottnest Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Rottnest Island for all months at once
