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September Weather in New Westminster, Canada

Last updated: June 18, 2025

In September, the average temperature in New Westminster, Canada is a pleasant 15°C (59°F). However, temperatures can range from a cool 6°C (44°F) to a warm 30°C (86°F). Expect about 205 mm (8.1 in) of precipitation over 14 days, resulting in a relatively high average humidity of 76%. 🌧️

September Temperature in New Westminster

In September in New Westminster, the average temperature is 15°C (59°F), with maximums reaching 30°C (86°F) and minimums dropping as low as 6°C (44°F). This climate makes New Westminster an ideal destination for travelers seeking mild weather and outdoor activities.

September Weather in New Westminster: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New Westminster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Westminster, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec383642475459646559494338
Data source: Temperature data for New Westminster 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 New Westminster

In New Westminster in September, the total precipitation amounts to 205 mm (8.1 in) over the course of 14 days.

September Precipitation Trends in New Westminster

The chart displays monthly precipitation patterns in New Westminster, 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 New Westminster, September typically receives around 205 mm (8.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec32019321417499964146205279411324
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Westminster

In New Westminster in September humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

September Average Humidity in New Westminster

This chart illustrates the average monthly humidity levels in New Westminster, 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 New Westminster is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%86%86%81%83%84%77%76%88%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New Westminster

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

Maximum UV Index Levels in New Westminster for September

The chart shows the monthly maximum UV Index (UVI) for New Westminster 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 New Westminster typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234688986421
Data source: New Westminster 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 New Westminster Compares to Other Months

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

This table compares monthly weather conditions in New Westminster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)320 mm (12.6 inches)86%low
February Weather2°C (37°F)193 mm (7.6 inches)85%moderate
March Weather5°C (42°F)214 mm (8.4 inches)86%moderate
April Weather8°C (47°F)174 mm (6.8 inches)86%high
May Weather12°C (55°F)99 mm (3.9 inches)81%very high
June Weather15°C (60°F)96 mm (3.8 inches)83%very high
July Weather18°C (64°F)41 mm (1.6 inches)84%very high
August Weather18°C (65°F)46 mm (1.8 inches)77%very high
September Weather15°C (59°F)205 mm (8.1 inches)76%high
October Weather9°C (49°F)279 mm (11.0 inches)88%moderate
November Weather6°C (44°F)411 mm (16.2 inches)87%low
December Weather3°C (38°F)324 mm (12.8 inches)87%low

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