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September Weather in Kaiapoi, New Zealand

Last updated: August 31, 2025

In September, the average temperature in Kaiapoi, New Zealand hovers around 10°C (50°F), with minimums dipping to 3°C (37°F) and maximums peaking at 18°C (65°F). Expect about 46 mm (1.8 in) of precipitation over 8 days, contributing to a notably high average humidity of 82%.

September Temperature in Kaiapoi

In September, in Kaiapoi, the average temperature is 10°C (50°F). Maximums can reach 18°C (65°F), while minimums can drop as low as 3°C (37°F). This mild climate makes Kaiapoi a pleasant destination for travelers looking to enjoy comfortable temperatures during their visit.

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

The chart illustrates September temperature patterns in Kaiapoi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kaiapoi, September typically has an average temperature of 10°C (50°F), with highs reaching up to 18°C (65°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec636360565248464850535760
Data source: Temperature data for Kaiapoi 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 Kaiapoi

In Kaiapoi in September, the precipitation amount is 46 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Kaiapoi

The chart displays monthly precipitation patterns in Kaiapoi, 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 Kaiapoi, September typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec474055705266664746566881
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kaiapoi

In Kaiapoi in September, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

September Average Humidity in Kaiapoi

This chart illustrates the average monthly humidity levels in Kaiapoi, 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 Kaiapoi is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%72%77%77%82%84%85%83%82%79%77%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kaiapoi

In Kaiapoi in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Kaiapoi.

Maximum UV Index Levels in Kaiapoi for September

The chart shows the monthly maximum UV Index (UVI) for Kaiapoi 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 Kaiapoi typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1312963223591012
Data source: Kaiapoi 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 Kaiapoi Compares to Other Months

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

This table compares monthly weather conditions in Kaiapoi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)47 mm (1.8 inches)72%extreme
February Weather17°C (63°F)40 mm (1.6 inches)72%extreme
March Weather16°C (60°F)55 mm (2.2 inches)77%very high
April Weather13°C (56°F)70 mm (2.8 inches)77%high
May Weather11°C (52°F)52 mm (2.1 inches)82%moderate
June Weather9°C (48°F)66 mm (2.6 inches)84%low
July Weather8°C (47°F)66 mm (2.6 inches)85%low
August Weather9°C (48°F)46 mm (1.8 inches)82%moderate
September Weather10°C (50°F)46 mm (1.8 inches)82%moderate
October Weather12°C (53°F)56 mm (2.2 inches)79%very high
November Weather14°C (57°F)68 mm (2.7 inches)77%very high
December Weather16°C (61°F)81 mm (3.2 inches)75%extreme

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