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September Weather in Brightwater, New Zealand

Last updated: August 31, 2025

The average temperature in Brightwater, New Zealand during September hovers around 8°C (46°F). While you might encounter a chilly minimum of -3°C (27°F), the mercury can rise to a pleasant 17°C (62°F). Be prepared for 126 mm (5.0 in) of precipitation spread over 13 days, with the average humidity sitting at a comfortable 83%.

September Temperature in Brightwater

In September in Brightwater, the average temperature is 8°C (46°F). The maximum can reach 17°C (62°F), and the minimum can be as low as -3°C (27°F). This range makes Brightwater a suitable destination for travelers seeking a mix of mild days and cool evenings.

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

The chart illustrates September temperature patterns in Brightwater, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brightwater, September typically has an average temperature of 8°C (46°F), with highs reaching up to 17°C (62°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec616057524743424446505458
Data source: Temperature data for Brightwater 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 Brightwater

In Brightwater in September, the precipitation amount is 126 mm (5.0 in) over the course of 13 days.

September Precipitation Trends in Brightwater

The chart displays monthly precipitation patterns in Brightwater, 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 Brightwater, September typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec767711512612565158112126116116153
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Brightwater

In Brightwater in September, humidity is 83%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making even short outings feel quite uncomfortable and prompting travelers to bundle up and seek shelter more frequently.

September Average Humidity in Brightwater

This chart illustrates the average monthly humidity levels in Brightwater, 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 Brightwater is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%79%79%80%84%86%86%83%83%82%82%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brightwater

In Brightwater 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 Brightwater, you can refer to this Hourly UV Index in Brightwater.

Maximum UV Index Levels in Brightwater for September

The chart shows the monthly maximum UV Index (UVI) for Brightwater 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 Brightwater typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1313974224691113
Data source: Brightwater 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 Brightwater Compares to Other Months

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

This table compares monthly weather conditions in Brightwater, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)76 mm (3.0 inches)79%extreme
February Weather16°C (60°F)77 mm (3.0 inches)79%extreme
March Weather14°C (57°F)115 mm (4.5 inches)79%very high
April Weather11°C (52°F)126 mm (5.0 inches)80%high
May Weather8°C (48°F)125 mm (4.9 inches)84%moderate
June Weather6°C (43°F)65 mm (2.6 inches)86%low
July Weather5°C (42°F)158 mm (6.2 inches)86%low
August Weather7°C (44°F)112 mm (4.4 inches)83%moderate
September Weather8°C (46°F)126 mm (5.0 inches)83%high
October Weather10°C (50°F)116 mm (4.6 inches)82%very high
November Weather12°C (55°F)116 mm (4.6 inches)82%extreme
December Weather15°C (59°F)153 mm (6.0 inches)81%extreme

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