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September Weather in Chertsey, Canada

Last updated: June 18, 2025

In September, the average temperature in Chertsey, Canada hovers around 14°C (58°F). Expect a temperature range from a brisk -1°C (30°F) to a pleasant 31°C (88°F). During this month, precipitation averages 89 mm (3.5 in) over 9 days, and the average humidity sits at a comfortable 78%.

September Temperature in Chertsey

In September in Chertsey, the average temperature is 14°C (58°F). Maximum temperatures can reach 31°C (88°F), while minimum temperatures can drop as low as -1°C (30°F). With such a wide range in temperatures, travelers should be prepared for both warm and chilly moments during their visit.

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

The chart illustrates September temperature patterns in Chertsey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chertsey, September typically has an average temperature of 14°C (58°F), with highs reaching up to 31°C (88°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec131625385463686658463018
Data source: Temperature data for Chertsey 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 Chertsey

In Chertsey in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

September Precipitation Trends in Chertsey

The chart displays monthly precipitation patterns in Chertsey, 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 Chertsey, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8592921201071111241148912611196
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chertsey

In Chertsey in September, humidity is 78%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat more than usual while exploring.

September Average Humidity in Chertsey

This chart illustrates the average monthly humidity levels in Chertsey, 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 Chertsey is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chertsey

In Chertsey 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 Chertsey.

Maximum UV Index Levels in Chertsey for September

The chart shows the monthly maximum UV Index (UVI) for Chertsey 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 Chertsey typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899887532
Data source: Chertsey 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 Chertsey Compares to Other Months

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

This table compares monthly weather conditions in Chertsey, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)85 mm (3.4 inches)93%low
February Weather-9°C (16°F)92 mm (3.6 inches)92%moderate
March Weather-4°C (25°F)91 mm (3.6 inches)86%moderate
April Weather4°C (39°F)120 mm (4.7 inches)85%very high
May Weather12°C (54°F)107 mm (4.2 inches)80%very high
June Weather17°C (63°F)111 mm (4.4 inches)74%very high
July Weather20°C (68°F)124 mm (4.9 inches)76%very high
August Weather19°C (66°F)114 mm (4.5 inches)75%very high
September Weather14°C (58°F)89 mm (3.5 inches)78%high
October Weather8°C (46°F)126 mm (5.0 inches)86%moderate
November Weather-1°C (30°F)111 mm (4.4 inches)88%moderate
December Weather-8°C (18°F)96 mm (3.8 inches)89%low

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