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September Weather in Wellington, United States

Last updated: June 24, 2025

In Wellington, United States, the average temperature in September hovers around 24°C (75°F). Expect a minimum of 6°C (43°F) and a sizzling maximum of 38°C (101°F). While you enjoy the warmth, be prepared for an average of 74 mm (2.9 in) of precipitation over 6 days, contributing to an average humidity of 72%.

September Temperature in Wellington

In September in Wellington, the average temperature is 24°C (75°F). Maximum temperatures can reach 38°C (101°F), while minimums can drop as low as 6°C (43°F). This makes Wellington an ideal destination for travelers looking to enjoy a variety of weather experiences.

September Weather in Wellington: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Wellington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wellington, September typically has an average temperature of 24°C (75°F), with highs reaching up to 38°C (101°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec404154617079838275615144
Data source: Temperature data for Wellington generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Wellington

In Wellington in September, the total precipitation amount is 74 mm (2.9 in), spread over a period of 6 days.

September Precipitation Trends in Wellington

The chart displays monthly precipitation patterns in Wellington, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Wellington, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec271870429388313574701622
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Wellington

In Wellington in September, humidity is 72%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapped around you, making any travel plans feel pleasantly sticky but still enjoyable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Wellington

This chart illustrates the average monthly humidity levels in Wellington, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Wellington is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wellington

In Wellington in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Wellington.

Maximum UV Index Levels in Wellington for September

The chart shows the monthly maximum UV Index (UVI) for Wellington in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Wellington typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
Data source: Wellington September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Wellington Compares to Other Months

Weather in Wellington varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Wellington, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Wellington, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (40°F)27 mm (1.1 inches)75%moderate
February Weather5°C (42°F)18 mm (0.7 inches)76%high
March Weather12°C (54°F)70 mm (2.7 inches)64%very high
April Weather16°C (61°F)42 mm (1.6 inches)70%very high
May Weather21°C (71°F)92 mm (3.6 inches)78%extreme
June Weather26°C (80°F)88 mm (3.5 inches)81%extreme
July Weather28°C (83°F)31 mm (1.2 inches)82%extreme
August Weather28°C (82°F)35 mm (1.4 inches)78%extreme
September Weather24°C (75°F)74 mm (2.9 inches)72%very high
October Weather16°C (62°F)70 mm (2.8 inches)73%high
November Weather10°C (51°F)16 mm (0.6 inches)80%moderate
December Weather7°C (44°F)22 mm (0.9 inches)81%moderate

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