September Weather in Onekawa, New Zealand

Last updated: August 31, 2025

In Onekawa, New Zealand, the average temperature in September hovers around 12°C (54°F), with a minimum of 4°C (39°F) and a pleasant maximum of 20°C (68°F). Expect 87 mm (3.4 in) of precipitation spread over 10 days, contributing to an average humidity level of 78%. Be prepared for a refreshing, albeit occasionally damp, month ahead!

September Temperature in Onekawa

In September in Onekawa, the average temperature is 12°C (54°F). Maximums can reach 20°C (68°F), and minimums can be as low as 4°C (39°F). It’s a pleasant time for travelers to enjoy mild weather while exploring the sights.

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

The chart illustrates September temperature patterns in Onekawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onekawa, September typically has an average temperature of 12°C (54°F), with highs reaching up to 20°C (68°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Onekawa generated using information from the Copernicus Climate Change Service.

September Precipitation in Onekawa

In Onekawa in September, the precipitation amount is 87 mm (3.4 in) over the course of 10 days.

September Precipitation Trends in Onekawa

The chart displays monthly precipitation patterns in Onekawa, 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 Onekawa, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Onekawa

In Onekawa in September humidity is 78%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill settling in, making travel a bit uncomfortable as the air clings to your skin, leaving you feeling cooler than the thermometer suggests.

September Average Humidity in Onekawa

This chart illustrates the average monthly humidity levels in Onekawa, 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 Onekawa is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Onekawa

In Onekawa in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Onekawa, you can refer to this Hourly UV Index in Onekawa.

Maximum UV Index Levels in Onekawa for September

The chart shows the monthly maximum UV Index (UVI) for Onekawa 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 Onekawa typically reaches 6, which falls under the high exposure category.

Data source: Onekawa 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 Onekawa Compares to Other Months

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

This table compares monthly weather conditions in Onekawa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (68°F)	45 mm (1.8 inches)	69%	extreme
February Weather	20°C (68°F)	62 mm (2.5 inches)	69%	extreme
March Weather	18°C (65°F)	76 mm (3.0 inches)	71%	very high
April Weather	16°C (61°F)	91 mm (3.6 inches)	74%	high
May Weather	14°C (57°F)	70 mm (2.8 inches)	83%	moderate
June Weather	12°C (54°F)	106 mm (4.2 inches)	85%	moderate
July Weather	11°C (52°F)	77 mm (3.0 inches)	86%	moderate
August Weather	11°C (52°F)	59 mm (2.3 inches)	83%	moderate
September Weather	12°C (54°F)	87 mm (3.4 inches)	78%	high
October Weather	14°C (57°F)	69 mm (2.7 inches)	77%	very high
November Weather	16°C (62°F)	72 mm (2.8 inches)	74%	extreme
December Weather	18°C (65°F)	75 mm (3.0 inches)	66%	extreme