nomadseason

September Weather in Prince Rupert, Canada

Last updated: June 18, 2025

In Prince Rupert, Canada, the average temperature in September hovers around 12°C (54°F), with lows dipping to 3°C (39°F) and highs reaching a pleasant 25°C (78°F). Be prepared for a wet month, as precipitation averages 256 mm (10.1 in) over 18 days, contributing to a notably high average humidity of 92%.

September Temperature in Prince Rupert

In September in Prince Rupert, the average temperature is 12°C (54°F). The maximum can reach 25°C (78°F), while the minimum can drop to as low as 3°C (39°F). Be prepared for a mix of mild and cooler temperatures during your travels.

September Weather in Prince Rupert: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Prince Rupert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prince Rupert, September typically has an average temperature of 12°C (54°F), with highs reaching up to 25°C (78°F) and lows dropping to around 3°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec353438434953575754464135
Data source: Temperature data for Prince Rupert generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Prince Rupert

In Prince Rupert in September, the total precipitation amount is 256 mm (10.1 in), measured over a span of 18 days.

September Precipitation Trends in Prince Rupert

The chart displays monthly precipitation patterns in Prince Rupert, 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 Prince Rupert, September typically receives around 256 mm (10.1 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec285240277215131171134243256339446314
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Prince Rupert

In Prince Rupert in September humidity is 92%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sweat-soaked, leaving you longing for cooler, drier air.

September Average Humidity in Prince Rupert

This chart illustrates the average monthly humidity levels in Prince Rupert, 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 Prince Rupert is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%85%81%81%90%92%92%91%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Prince Rupert

In Prince Rupert 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 Prince Rupert.

Maximum UV Index Levels in Prince Rupert for September

The chart shows the monthly maximum UV Index (UVI) for Prince Rupert 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 Prince Rupert typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123577875311
Data source: Prince Rupert 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 Prince Rupert Compares to Other Months

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

This table compares monthly weather conditions in Prince Rupert, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)285 mm (11.2 inches)86%low
February Weather1°C (34°F)240 mm (9.4 inches)85%low
March Weather3°C (38°F)277 mm (10.9 inches)84%moderate
April Weather6°C (43°F)215 mm (8.4 inches)85%moderate
May Weather9°C (49°F)131 mm (5.2 inches)81%high
June Weather12°C (53°F)171 mm (6.7 inches)81%high
July Weather14°C (57°F)134 mm (5.3 inches)90%very high
August Weather14°C (57°F)243 mm (9.6 inches)92%high
September Weather12°C (54°F)256 mm (10.1 inches)92%moderate
October Weather8°C (46°F)339 mm (13.3 inches)91%moderate
November Weather5°C (42°F)446 mm (17.5 inches)87%low
December Weather2°C (36°F)314 mm (12.4 inches)87%low

Compare Prince Rupert's Climate with Cities Worldwide