nomadseason

September Weather in Arnprior, Canada

Last updated: June 18, 2025

In September, the average temperature in Arnprior, Canada hovers around 15°C (60°F). Expect a range of temperatures from a brisk 0°C (32°F) to a warm 33°C (91°F). During this time, you can anticipate approximately 70 mm (2.8 in) of precipitation spread over 9 days, with an average humidity level of 72%. Stay prepared for varied weather conditions!

September Temperature in Arnprior

In September in Arnprior, the average temperature is 15°C (60°F). Maximums can reach 33°C (91°F), and minimums can be as low as 0°C (32°F). Be prepared for a wide range of temperatures, making it advisable to pack layers for your trip.

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

The chart illustrates September temperature patterns in Arnprior, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arnprior, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec161827415564706760483222
Data source: Temperature data for Arnprior 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 Arnprior

In Arnprior in September, the total precipitation amount is 70 mm (2.8 in) spread over 9 days.

September Precipitation Trends in Arnprior

The chart displays monthly precipitation patterns in Arnprior, 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 Arnprior, September typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec71758011011595107101701259076
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Arnprior

In Arnprior in September humidity is 72%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, creating a slightly muggy atmosphere that can make strolling around a bit sticky. Travelers might find themselves longing for a refreshing breeze, and it’s advisable to stay hydrated while exploring local sights.

September Average Humidity in Arnprior

This chart illustrates the average monthly humidity levels in Arnprior, 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 Arnprior is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arnprior

In Arnprior 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 Arnprior.

Maximum UV Index Levels in Arnprior for September

The chart shows the monthly maximum UV Index (UVI) for Arnprior 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 Arnprior typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899997532
Data source: Arnprior 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 Arnprior Compares to Other Months

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

This table compares monthly weather conditions in Arnprior, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)71 mm (2.8 inches)93%low
February Weather-8°C (18°F)75 mm (3.0 inches)93%moderate
March Weather-3°C (28°F)80 mm (3.1 inches)86%moderate
April Weather5°C (42°F)110 mm (4.3 inches)82%very high
May Weather13°C (55°F)115 mm (4.5 inches)75%very high
June Weather18°C (65°F)95 mm (3.7 inches)68%very high
July Weather21°C (71°F)107 mm (4.2 inches)69%very high
August Weather20°C (68°F)101 mm (4.0 inches)67%very high
September Weather15°C (60°F)70 mm (2.8 inches)72%high
October Weather9°C (48°F)125 mm (4.9 inches)83%moderate
November Weather0°C (33°F)90 mm (3.5 inches)88%moderate
December Weather-6°C (22°F)76 mm (3.0 inches)89%low

Compare Arnprior's Climate with Cities Worldwide