September weather forecast
Mandurah, Australia

September

Weather in September

September, the first month of the spring in Mandurah, is still a comfortable month, with temperature in the range of an average high of 17.3°C (63.1°F) and an average low of 11.8°C (53.2°F).

Temperature

Mandurah transitions into September recording an average high-temperature of a still enjoyable 17.3°C (63.1°F), closely aligning with the preceding month's temperature. Mandurah records an average low-temperature of 11.8°C (53.2°F) throughout the month of September.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Mandurah, in September, it is raining for 13.8 days, with typically 43mm (1.69") of accumulated precipitation. Throughout the year, there are 115 rainfall days, and 411mm (16.18") of precipitation is accumulated.

Sea temperature

September is the month with the coldest seawater in Mandurah, with an average sea temperature of 18.3°C (64.9°F).
Note: For the majority of people, swimming in water at 18.3°C (64.9°F) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In September, the average length of the day is 11h and 53min.
On the first day of September in Mandurah, sunrise is at 6:33 am and sunset at 6:00 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 6:18 pm AWST.

Sunshine

The average sunshine in September is 8h.

UV index

June through September, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 4 in September transforms into this advice:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.

Frequently asked questions

What is the average September temperature in Mandurah?
The average high-temperature and low-temperature in Mandurah, Australia, during September are 17.3°C (63.1°F) and 11.8°C (53.2°F) respectively. In February, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is evaluated at 28°C (82.4°F).
What is the average humidity in September in Mandurah?
In September, the average relative humidity in Mandurah, Australia, is 73%.
How much does it rain in Mandurah in September?
In Mandurah, in September, during 13.8 rainfall days, 43mm (1.69") of precipitation is typically accumulated.
What is the month with the coldest sea water in Mandurah?
With an average sea temperature of 18.3°C (64.9°F), September is the month with the coldest seawater in Mandurah, Australia.
What is the sea water temperature in September in Mandurah?
In September, the average sea temperature in Mandurah is 18.3°C (64.9°F). For most, swimming in 18.3°C (64.9°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 Mandurah have in September?
In Mandurah, Australia, the average day length in September is 11h and 53min.
What time are sunrise and sunset in September in Mandurah?
In September, on the first day of the month, sunrise is at 6:33 am and sunset at 6:00 pm. On the last day of the month, in Mandurah, Australia, sunrise is at 5:55 am and sunset at 6:18 pm AWST.
How long on average sun shines in September in Mandurah?
The average sunshine duration in September is 8h.
What is the month with the lowest UV index in Mandurah?
The months with the lowest UV index in Mandurah are June through September, with an average maximum UV index of 4.
How high is the UV index in September in Mandurah?
In September, the average daily maximum UV index in Mandurah is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Mandurah, Australia
  • Average high temperature in September: 17.3°C

The warmest month (with the highest average high temperature) is February (27.2°C).
The month with the lowest average high temperature is July (16.4°C).

  • Average low temperature in September: 11.8°C

The month with the highest average low temperature is February (19°C).
The coldest months (with the lowest average low temperature) are August and September (11.8°C).

Average pressure in September
Mandurah, Australia
  • Average pressure in September: 1018.9mbar

The month with the highest atmospheric pressure is July (1020.3mbar).
The month with the lowest atmospheric pressure is January (1012mbar).

Average wind speed in September
Mandurah, Australia
  • Average wind speed in September: 18.7km/h

The windiest month (with the highest average wind speed) is January (20.1km/h).
The calmest month (with the lowest average wind speed) is April (16.7km/h).

Average humidity in September
Mandurah, Australia
  • Average humidity in September: 73%

The months with the highest relative humidity are July and August (74%).
The month with the lowest relative humidity is January (61%).

Average rainfall in September
Mandurah, Australia
  • Average rainfall in September: 43mm

The wettest month (with the highest rainfall) is June (79mm).
The driest month (with the least rainfall) is December (7mm).

Average rainfall days in September
Mandurah, Australia
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (3.3 days).

Average sea temperature in September
Mandurah, Australia
  • Average sea temperature in September: 18.3°C

The best month for swimming (with the highest average sea temperature) is March (22.8°C).
The coldest month (with the lowest average sea temperature) is September (18.3°C).

Average daylight in September /
Average sunshine in September
Mandurah, 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 0min).

  • Average sunshine in September: 8h and 0min

The month with the most sunshine is January (Average sunshine: 11h and 30min).
The month with the least sunshine is August (Average sunshine: 5h and 36min).

Average sunshine days in September
Mandurah, Australia
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is December (25.4 days).
The month with the least sunshine days is August (10.7 days).

Average UV index in September
Mandurah, Australia
  • Average UV index in September: 4

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

Average cloud cover in September
Mandurah, Australia
  • Average cloud cover in September: 34

The month with the most cloud cover is July (Cloud cover 40).
The month with the least cloud cover is January (Cloud cover 13).

Average visibility in September
Mandurah, 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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