nomadseason

September Weather in Joliette, Canada

Last updated: June 18, 2025

In September, the average temperature in Joliette, Canada hovers around 15°C (60°F). Expect conditions to vary, with minimum temperatures dipping to -1°C (30°F) and maximums soaring up to 32°C (90°F). You’ll likely experience around 64 mm (2.5 in) of precipitation over 8 days, contributing to an average humidity of 78%, making this month both refreshing and a bit damp.

September Temperature in Joliette

In September in Joliette, the average temperature is 15°C (60°F), with maximums reaching up to 32°C (90°F) and minimums dipping as low as -1°C (30°F). This makes Joliette an ideal destination for travelers seeking a mix of warm days and cool evenings.

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

The chart illustrates September temperature patterns in Joliette, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joliette, September typically has an average temperature of 15°C (60°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec151827415665716860483221
Data source: Temperature data for Joliette 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 Joliette

In Joliette in September, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

September Precipitation Trends in Joliette

The chart displays monthly precipitation patterns in Joliette, 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 Joliette, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec828284120959084956411911188
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Joliette

In Joliette in September, humidity is 78%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp embrace that can make outdoor activities a bit uncomfortable, highlighting the importance of staying hydrated and taking breaks in the shade while exploring.

September Average Humidity in Joliette

This chart illustrates the average monthly humidity levels in Joliette, 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 Joliette 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 Joliette

In Joliette 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 Joliette.

Maximum UV Index Levels in Joliette for September

The chart shows the monthly maximum UV Index (UVI) for Joliette 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 Joliette typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Joliette 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 Joliette Compares to Other Months

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

This table compares monthly weather conditions in Joliette, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)82 mm (3.2 inches)93%low
February Weather-8°C (18°F)82 mm (3.2 inches)92%moderate
March Weather-3°C (27°F)84 mm (3.3 inches)86%moderate
April Weather5°C (41°F)120 mm (4.7 inches)85%high
May Weather13°C (56°F)95 mm (3.8 inches)80%very high
June Weather18°C (65°F)90 mm (3.5 inches)74%very high
July Weather22°C (71°F)84 mm (3.3 inches)76%very high
August Weather20°C (68°F)95 mm (3.7 inches)75%very high
September Weather15°C (60°F)64 mm (2.5 inches)78%high
October Weather9°C (48°F)119 mm (4.7 inches)86%moderate
November Weather0°C (32°F)110 mm (4.4 inches)88%moderate
December Weather-6°C (21°F)88 mm (3.4 inches)89%low

Compare Joliette's Climate with Cities Worldwide