September weather forecast
Geelong, Australia

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Weather in September

September in Geelong is a celebration of the arrival of spring season. The mounting daylight hours bring about longer and brighter days, perfect for taking advantage of the expansive outdoor environments. The slightly less rainfall and moderating temperature, play their part in this transformation. Although wind speed drops to 14km/h (8.7mph), it doesn’t interfere with the beautiful blooming scenery all over the city. September, thus, becomes the choice month for many families and tourists seeking to promote their much-needed relaxation in a pleasant weather.

Temperature

A minimal variation is noted in Geelong's average high-temperature at the onset of September, reaching a still refreshing 15.8°C (60.4°F) from August's 13.8°C (56.8°F). An average low-temperature of 7.7°C (45.9°F) is common during the nights of September.

Humidity

In Geelong, the average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 14.2 days. Throughout September, 31mm (1.22") of precipitation is accumulated. Throughout the year, in Geelong, there are 153 rainfall days, and 377mm (14.84") of precipitation is accumulated.

Sea temperature

August and September, with an average sea temperature of 13.8°C (56.8°F), are months with the coldest seawater in Geelong.
Note: It is life-risking to swim in 13.8°C (56.8°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance.

Daylight

In September, the average length of the day is 11h and 50min.
On the first day of September in Geelong, sunrise is at 6:43 am and sunset at 6:01 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 6:26 pm AEST.

Sunshine

In Geelong, the average sunshine in September is 7.4h.

UV index

In Geelong, Australia, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 4 during September translates into the following guidance:
Exercise prevention - Warding off sunburn is urged. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What are the temperatures in Geelong in September?

Geelong in September has an average high-temperature of 15.8°C (60.4°F) and an average low-temperature of 7.7°C (45.9°F).

What is the average humidity in September in Geelong?

The average relative humidity in September in Geelong is 74%.

How much does it rain in Geelong in September?

In Geelong, Australia, in September, during 14.2 rainfall days, 31mm (1.22") of precipitation is typically accumulated.

When is the sea coldest in Geelong?

The months with the coldest seawater are August and September, with an average sea temperature of 13.8°C (56.8°F).

What is the sea water temperature in September in Geelong?

In September, the average sea temperature in Geelong is 13.8°C (56.8°F). Swimming in 13.8°C (56.8°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in September in Geelong?

The average day length in September is 11h and 50min.

When is the sunrise / sunset in September in Geelong?

In September, on the first day of the month, sunrise is at 6:43 am and sunset at 6:01 pm. On the last day of the month, in Geelong, Australia, sunrise is at 5:58 am and sunset at 6:26 pm AEST.

How many hours of sunshine does Geelong have in September?

In Geelong, Australia, the average sunshine duration in September is 7.4h.

How high is the UV index in September in Geelong?

In Geelong, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in September
Geelong, Australia

Average temperature in September - Geelong, Australia
  • Average high temperature in September: 15.8°C

The warmest month (with the highest average high temperature) is January (25.1°C).
The month with the lowest average high temperature is July (13.1°C).

  • Average low temperature in September: 7.7°C

The month with the highest average low temperature is February (15.1°C).
The coldest month (with the lowest average low temperature) is August (7°C).

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Average pressure in September
Geelong, Australia

Average pressure in September - Geelong, Australia
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is June (1021.1mbar).
The month with the lowest atmospheric pressure is January (1012.6mbar).

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Average wind speed in September
Geelong, Australia

Average wind speed in September - Geelong, Australia
  • Average wind speed in September: 14km/h

The windiest month (with the highest average wind speed) is August (14.9km/h).
The calmest month (with the lowest average wind speed) is April (11.2km/h).

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Average humidity in September
Geelong, Australia

Average humidity in September - Geelong, Australia
  • Average humidity in September: 74%

The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is January (64%).

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Average rainfall in September
Geelong, Australia

Average rainfall in September - Geelong, Australia
  • Average rainfall in September: 31mm

The wettest month (with the highest rainfall) is February (40mm).
The driest month (with the least rainfall) is March (25mm).

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Average rainfall days in September
Geelong, Australia

Average rainfall days in September - Geelong, Australia
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (9.7 days).

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Average sea temperature in September
Geelong, Australia

Average sea temperature in September - Geelong, Australia
  • Average sea temperature in September: 13.8°C

The best month for swimming (with the highest average sea temperature) is February (18.3°C).
The coldest months (with the lowest average sea temperature) are August and September (13.8°C).

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Average daylight in September /
Average sunshine in September
Geelong, Australia

Average daylight in September / Average sunshine in September - Geelong, Australia
  • Average daylight in September: 11h and 5min

The month with the longest days is December (Average daylight: 14h and 48min).
The month with the shortest days is June (Average daylight: 9h and 36min).

  • Average sunshine in September: 7h and 2min

The month with the most sunshine is December (Average sunshine: 9h and 42min).
The month with the least sunshine is August (Average sunshine: 6h and 42min).

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Average sunshine days in September
Geelong, Australia

Average sunshine days in September - Geelong, Australia
  • Average sunshine days in September: 12.1 days

The month with the most sunshine days is January (16.9 days).
The month with the least sunshine days is September (12.1 days).

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Average UV index in September
Geelong, Australia

Average UV index in September - Geelong, Australia
  • Average UV index in September: 4

The month with the highest UV index is December (UV index 6).
The months with the lowest UV index are June, July and August (UV index 3).

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Average cloud cover in September
Geelong, Australia

Average cloud cover in September - Geelong, Australia
  • Average cloud cover in September: 42

The months with the most cloud cover are May and August (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 31).

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Average visibility in September
Geelong, Australia

Average visibility in September - Geelong, Australia
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, June and December (10km).
The months with the lowest visibility are April, May, July, August, September, October and November (9km).

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Geelong, Australia

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