September weather forecast and climate
Auckland, New Zealand

The city of Auckland, New Zealand, viewed across the water early morning
The city of Auckland, New Zealand, viewed across the water early morning

Weather in September

The first month of the spring, September, is also a moderate month in Auckland, New Zealand, with average temperature fluctuating between 10.9°C (51.6°F) and 14.8°C (58.6°F).

Temperature

In Auckland, the average high-temperature in September is practically the same as in August - a still mild 14.8°C (58.6°F). In September, in Auckland, the average low-temperature is 10.9°C (51.6°F).

Humidity

Months with the highest humidity in Auckland, New Zealand, are August and September, with an average relative humidity of 79%.

Rainfall

In Auckland, during September, the rain falls for 17.5 days and regularly aggregates up to 61mm (2.4") of precipitation. Throughout the year, in Auckland, there are 186.5 rainfall days, and 625mm (24.61") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 15°C (59°F).
Note: For swimming, a surface water temperature of 15°C (59°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In Auckland, New Zealand, the average length of the day in September is 11.9h.

Sunshine

In September, the average sunshine is 6.5h.

UV index

The average daily maximum UV index in Auckland is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the most humid month in Auckland?

Months with the highest humidity in Auckland are August and September, with an average relative humidity of 79%.

What is the average humidity in September in Auckland?

The average relative humidity in September in Auckland is 79%.

How much does it rain in Auckland in September?

In Auckland, in September, it is raining for 17.5 days, with typically 61mm (2.4") of accumulated precipitation.

How cold is the water in September in Auckland?

In September, the average sea temperature in Auckland is 15°C (59°F). For most, swimming in 15°C (59°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).

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

In Auckland, the average length of the day in September is 11.9h.

How long on average sun shines in September in Auckland?

In Auckland, New Zealand, the average sunshine in September is 6.5h.

What is the UV index intensity in September in Auckland?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Auckland, New Zealand

Average temperature in September - Auckland, New Zealand
  • Average high temperature in September: 14.8°C

The warmest month (with the highest average high temperature) is February (22.6°C).
The month with the lowest average high temperature is July (13.8°C).

  • Average low temperature in September: 10.9°C

The month with the highest average low temperature is February (17.5°C).
The coldest month (with the lowest average low temperature) is July (10.4°C).

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Average pressure in September
Auckland, New Zealand

Average pressure in September - Auckland, New Zealand
  • Average pressure in September: 1014.8mbar

The month with the highest atmospheric pressure is March (1018.3mbar).
Months with the lowest atmospheric pressure are January and September (1014.8mbar).

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Average wind speed in September
Auckland, New Zealand

Average wind speed in September - Auckland, New Zealand
  • Average wind speed in September: 19km/h

The windiest month (with the highest average wind speed) is September (19km/h).
The calmest month (with the lowest average wind speed) is February (13.9km/h).

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Average humidity in September
Auckland, New Zealand

Average humidity in September - Auckland, New Zealand
  • Average humidity in September: 79%

Months with the highest relative humidity are August and September (79%).
Months with the lowest relative humidity are January, February, March and November (77%).

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Average rainfall in September
Auckland, New Zealand

Average rainfall in September - Auckland, New Zealand
  • Average rainfall in September: 61mm

The wettest month (with the highest rainfall) is June (71mm).
The driest month (with the least rainfall) is January (34mm).

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Average rainfall days in September
Auckland, New Zealand

Average rainfall days in September - Auckland, New Zealand
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is January (11.1 days).

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Average sea temperature in September
Auckland, New Zealand

Average sea temperature in September - Auckland, New Zealand
  • Average sea temperature in September: 15°C

The best month for swimming (with the highest average sea temperature) is February (21.3°C).
The coldest month (with the lowest average sea temperature) is August (14.7°C).

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Average daylight in September /
Average sunshine in September
Auckland, New Zealand

Average daylight in September / Average sunshine in September - Auckland, New Zealand
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.6h).
The month with the shortest days is June (Average daylight: 9.7h).

  • Average sunshine in September: 6.5h

The month with the most sunshine is December (Average sunshine: 8.3h).
The month with the least sunshine is August (Average sunshine: 6.4h).

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Average sunshine days in September
Auckland, New Zealand

Average sunshine days in September - Auckland, New Zealand
  • Average sunshine days in September: 7.7 days

The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is September (7.7 days).

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Average UV index in September
Auckland, New Zealand

Average UV index in September - Auckland, New Zealand
  • Average UV index in September: 4

Months with the highest UV index are January, February, March, April and December (UV index 5).
The month with the lowest UV index is June (UV index 3).

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Average cloud cover in September
Auckland, New Zealand

Average cloud cover in September - Auckland, New Zealand
  • Average cloud cover in September: 49

The month with the most cloud cover is September (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 37).

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Average visibility in September
Auckland, New Zealand

Average visibility in September - Auckland, New Zealand
  • Average visibility in September: 10km

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

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