September weather forecast and climate
Wellington, New Zealand

A red cable bus on the road in Wellington, New Zealand, with the view of the sea, mountains, and the city in the distance
A red cable bus on the road in Wellington, New Zealand, with the view of the sea, mountains, and the city in the distance
The first month of the spring, September, is also a fresh month in Wellington, New Zealand, with average temperature ranging between max 12.5°C (54.5°F) and min 9.6°C (49.3°F).

Temperature

In Wellington, New Zealand, the average high-temperature is essentially the same as in August - a still cool 12.5°C (54.5°F). In Wellington, in September, the average low-temperature is 9.6°C (49.3°F).

Humidity

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

Rainfall

In Wellington, during September, the rain falls for 13 days and regularly aggregates up to 25mm (0.98") of precipitation. 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, the average seawater temperature in September is 12.7°C (54.9°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

In Wellington, the average length of the day in September is 11.8h.

Sunshine

The average sunshine in September is 7.5h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 transform into the following instructions:
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.

What is the temperature in September in Wellington?

The average high-temperature, in September, is 12.5°C (54.5°F), while the average low-temperature is 9.6°C (49.3°F).

What is the average humidity in September in Wellington?

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

How many days does it rain in September in Wellington?

In Wellington, in September, during 13 rainfall days, 25mm (0.98") of precipitation is typically accumulated.

What is the sea water temperature in September in Wellington?

In September, the average sea temperature in Wellington 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.

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

In September, the average length of the day in Wellington is 11.8h.

How many hours of sunshine does Wellington have in September?

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

What is the UV index reading 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 moderate vulnerability from the exposure to the Sun's UV radiation.
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).

Average pressure in September - Wellington, New Zealand
  • Average pressure in September: 1012.2mbar

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

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).

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

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

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).

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).

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).

Average daylight in September / Average sunshine in September - Wellington, New Zealand
  • Average daylight in September: 11.8h

The month with the longest days is December (Average daylight: 15.1h).
The month with the shortest days is June (Average daylight: 9.2h).

  • Average sunshine in September: 7.5h

The month with the most sunshine is December (Average sunshine: 9.4h).
The month with the least sunshine is June (Average sunshine: 5.4h).

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).

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

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

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).

Average visibility in September - Wellington, 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).