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September Weather in Christchurch, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Christchurch, United Kingdom hovers around 16°C (61°F), with a minimum dipping to 8°C (47°F) and a maximum reaching 24°C (75°F). Expect 60 mm (2.4 in) of precipitation over approximately 10 days, contributing to an average humidity of a cozy 82%.

September Temperature in Christchurch

In September in Christchurch, the average temperature is 16°C (61°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as 8°C (47°F). This pleasant climate makes Christchurch an ideal destination for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Christchurch, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Christchurch, September typically has an average temperature of 16°C (61°F), with highs reaching up to 24°C (75°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec444546495460646461565047
Data source: Temperature data for Christchurch 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 Christchurch

In Christchurch in September, the precipitation amount is 60 mm (2.4 in) accumulated over a period of 10 days.

September Precipitation Trends in Christchurch

The chart displays monthly precipitation patterns in Christchurch, 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 Christchurch, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec79858139617865896113595129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Christchurch

In Christchurch in September humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.

September Average Humidity in Christchurch

This chart illustrates the average monthly humidity levels in Christchurch, 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 Christchurch is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Christchurch

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

Maximum UV Index Levels in Christchurch for September

The chart shows the monthly maximum UV Index (UVI) for Christchurch 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 Christchurch typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578876421
Data source: Christchurch 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 Christchurch Compares to Other Months

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

This table compares monthly weather conditions in Christchurch, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)79 mm (3.1 inches)91%low
February Weather7°C (45°F)85 mm (3.3 inches)89%low
March Weather8°C (47°F)81 mm (3.2 inches)86%moderate
April Weather10°C (49°F)39 mm (1.5 inches)85%moderate
May Weather12°C (55°F)61 mm (2.4 inches)79%high
June Weather16°C (61°F)78 mm (3.1 inches)80%very high
July Weather18°C (65°F)65 mm (2.5 inches)71%very high
August Weather18°C (64°F)89 mm (3.5 inches)76%high
September Weather16°C (61°F)60 mm (2.4 inches)82%high
October Weather13°C (56°F)135 mm (5.3 inches)90%moderate
November Weather10°C (50°F)95 mm (3.7 inches)92%low
December Weather8°C (47°F)129 mm (5.1 inches)92%low

Compare Christchurch's Climate with Cities Worldwide