September weather - Spring 2024 - Wellington, New Zealand

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

A red cable bus on the road in Wellington, New Zealand, with the view of the sea, mountains, and the city in the distance

Weather in September

September acts as a harbinger of spring, with daylight hours slowly stretching out. A subtle rise in temperatures, compared to August, signifies Wellington's transition to a milder weather pattern towards October. Although the temperatures start to thaw, rainfall maintains a constant pattern, keeping the city's landscape lush. The wind picks up speed, filling the air with a refreshing and slightly chilly breeze. With the departure of winter, Wellingtonians begin to enjoy days with more sunlight and milder temperatures.

Temperature

The advent of September observes an average high-temperature of a still fresh 12.5°C (54.5°F), nearly identical to August's 11.8°C (53.2°F). Throughout September, Wellington records a steady low-temperature average of 9.6°C (49.3°F), a minor decrease from its daytime counterpart.

Humidity

In September, the average relative humidity in Wellington, New Zealand, is 79%.

Rainfall

In September, in Wellington, the rain falls for 13 days. Throughout September, 25mm (0.98") of precipitation is accumulated. In Wellington, during the entire year, the rain falls for 144.3 days and collects up to 394mm (15.51") of precipitation.

Sea temperature

In Wellington, New Zealand, in September, the average water temperature is 12.7°C (54.9°F).
Note: Swimming in 12.7°C (54.9°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

In Wellington, the average length of the day in September is 11h and 49min.
On the first day of the month, sunrise is at 6:45 am and sunset at 5:56 pm NZST. On the last day of September, sunrise is at 6:56 am and sunset at 7:25 pm NZDT.
Note: On Sunday, 29. September 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from NZST to NZDT. Daylight Saving Time lasts until Sunday, 06. April 2025, at 3:00 am; consequently, the time zone reverts from NZDT to NZST.

Sunshine

The average sunshine in September is 7.5h.

UV index

In Wellington, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Always opt for UVA and UVB-resistant sunglasses on radiant days.

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Frequently asked questions

What is the temperature in September in Wellington?

In Wellington, 12.5°C (54.5°F) is the average high-temperature and 9.6°C (49.3°F) is the average low-temperature during September.

What is the average humidity in September in Wellington?

In September, the average relative humidity in Wellington, New Zealand, is 79%.

How much does it rain in Wellington in September?

In Wellington, during September, the rain falls for 13 days and regularly aggregates up to 25mm (0.98") of precipitation.

What is the sea water temperature in September in Wellington?

In Wellington, in September, the average water temperature is 12.7°C (54.9°F). Swimming in 12.7°C (54.9°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Wellington have in September?

The average day length in September in Wellington, New Zealand, is 11h and 49min.

When is the sunrise / sunset in September in Wellington?

On the first day of September, sunrise is at 6:45 am and sunset at 5:56 pm NZST. On the last day of the month, sunrise is at 6:56 am and sunset at 7:25 pm NZDT.

When does Daylight Saving Time (DST) start in September in Wellington?

On Sunday, 29. September 2024, at 2:00 am, Daylight Saving Time starts in Wellington, and the time zone changes from NZST to NZDT. DST ends on Sunday, 06. April 2025, at 3:00 am.

How many hours of sunshine does Wellington have in September?

In September, the average sunshine duration in Wellington, New Zealand, is 7.5h.

What is the UV index intensity in September in Wellington?

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

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

11.8°C 53.2°F

12.5°C 54.5°F

13.8°C 56.8°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

25.6km/h 15.9mph

28km/h 17.4mph

28.6km/h 17.8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

13.4

13.7

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.8

14.3

14.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Wellington, New Zealand

Average high temperature in September: 12.5°C

The warmest month (with the highest average high temperature) is February (18.8°C).
The month with the lowest average high temperature is July (11.4°C).

Average low temperature in September: 9.6°C

The month with the highest average low temperature is February (15.4°C).
The coldest month (with the lowest average low temperature) is July (9°C).

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Average pressure in September
Wellington, New Zealand

Average pressure in September: 1012.2mbar

The month with the highest atmospheric pressure is March (1017.7mbar).
The months with the lowest atmospheric pressure are September and November (1012.2mbar).

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Average wind speed in September
Wellington, New Zealand

Average wind speed in September: 26.9km/h

The windiest month (with the highest average wind speed) is September (26.9km/h).
The calmest month (with the lowest average wind speed) is March (23.1km/h).

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Average humidity in September
Wellington, New Zealand

Average humidity in September: 79%

The months with the highest relative humidity are February, March, April and December (80%).
The month with the lowest relative humidity is July (78%).

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Average rainfall in September
Wellington, New Zealand

Average rainfall in September: 25mm

The wettest month (with the highest rainfall) is June (47mm).
The driest months (with the least rainfall) are January and February (20mm).

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Average rainfall days in September
Wellington, New Zealand

Average rainfall days in September: 13 days

The month with the highest number of rainy days is June (14.5 days).
The month with the least rainy days is February (8 days).

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Average sea temperature in September
Wellington, New Zealand

Average sea temperature in September: 12.7°C

The best month for swimming (with the highest average sea temperature) is February (17.1°C).
The coldest month (with the lowest average sea temperature) is August (12.3°C).

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

Average daylight in September: 11h and 5min

The month with the longest days is December (Average daylight: 15h and 6min).
The month with the shortest days is June (Average daylight: 9h and 12min).

Average sunshine in September: 7h and 3min

The month with the most sunshine is December (Average sunshine: 9h and 24min).
The month with the least sunshine is June (Average sunshine: 5h and 24min).

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Average sunshine days in September
Wellington, New Zealand

Average sunshine days in September: 14.3 days

The month with the most sunshine days is March (19 days).
The month with the least sunshine days is June (11.5 days).

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Average UV index in September
Wellington, New Zealand

Average UV index in September: 4

The months with the highest UV index are January, February, March and December (UV index 5).
The months with the lowest UV index are May and June (UV index 3).

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Average cloud cover in September
Wellington, New Zealand

Average cloud cover in September: 38

The month with the most cloud cover is June (Cloud cover 44).
The month with the least cloud cover is February (Cloud cover 30).

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Average visibility in September
Wellington, New Zealand

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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September weather forecast
Wellington, New Zealand

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