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September Weather in Onerahi, New Zealand

Last updated: August 31, 2025

In September, the average temperature in Onerahi, New Zealand is a mild 13°C (55°F). Expect lows around 4°C (40°F) and highs reaching 21°C (71°F). Prepare for some rain as well, with an average precipitation of 99 mm (3.9 in) spread over 13 days. Humidity hovers around a comfortable 78%, making it a unique month to experience.

September Temperature in Onerahi

In September in Onerahi, the average temperature is 13°C (55°F). Maximums can reach 21°C (71°F), while minimums can drop to as low as 4°C (40°F). This mild weather makes Onerahi a great destination for travelers seeking comfortable temperatures and outdoor activities.

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

The chart illustrates September temperature patterns in Onerahi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onerahi, September typically has an average temperature of 13°C (55°F), with highs reaching up to 21°C (71°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec686966625855535455586266
Data source: Temperature data for Onerahi 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 Onerahi

In Onerahi in September, the precipitation amount is 99 mm (3.9 in) over the course of 13 days.

September Precipitation Trends in Onerahi

The chart displays monthly precipitation patterns in Onerahi, 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 Onerahi, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec4984728864119999199937259
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Onerahi

In Onerahi in September, humidity is 78%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket enveloping you, making outdoor activities feel steamy and your clothes cling uncomfortably, often leaving you longing for a cool breeze or an air-conditioned escape while exploring.

September Average Humidity in Onerahi

This chart illustrates the average monthly humidity levels in Onerahi, 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 Onerahi is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%76%75%77%80%80%78%78%79%79%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Onerahi

In Onerahi in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Onerahi.

Maximum UV Index Levels in Onerahi for September

The chart shows the monthly maximum UV Index (UVI) for Onerahi 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 Onerahi typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141411753357101214
Data source: Onerahi 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 Onerahi Compares to Other Months

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

This table compares monthly weather conditions in Onerahi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)49 mm (1.9 inches)79%extreme
February Weather21°C (69°F)84 mm (3.3 inches)78%extreme
March Weather19°C (67°F)72 mm (2.8 inches)76%extreme
April Weather17°C (63°F)88 mm (3.5 inches)75%high
May Weather15°C (59°F)64 mm (2.5 inches)77%moderate
June Weather13°C (55°F)119 mm (4.7 inches)80%moderate
July Weather12°C (53°F)99 mm (3.9 inches)80%moderate
August Weather12°C (54°F)91 mm (3.6 inches)78%moderate
September Weather13°C (55°F)99 mm (3.9 inches)78%high
October Weather15°C (58°F)93 mm (3.7 inches)79%very high
November Weather17°C (62°F)72 mm (2.8 inches)79%extreme
December Weather19°C (66°F)59 mm (2.3 inches)78%extreme

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