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September Weather in Sainte-Croix, Canada

Last updated: June 18, 2025

In September, the average temperature in Sainte-Croix, Canada is a mild 16°C (60°F). However, temperatures can vary significantly, with a minimum of -3°C (27°F) and a maximum soaring to 30°C (87°F). This month sees an average precipitation of 77 mm (3.0 in), spread across 11 days, contributing to a relatively high average humidity of 78%. Prepare accordingly for a blend of cool and warm days!

September Temperature in Sainte-Croix

In September in Sainte-Croix, the average temperature is 16°C (60°F), with maximums reaching 30°C (87°F) and minimums dropping as low as -3°C (27°F). This wide temperature range makes it essential for travelers to pack layers to comfortably enjoy all that Sainte-Croix has to offer.

September Weather in Sainte-Croix: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sainte-Croix, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sainte-Croix, September typically has an average temperature of 16°C (60°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec182129425664706860493424
Data source: Temperature data for Sainte-Croix 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 Sainte-Croix

In Sainte-Croix in September, the precipitation amount is 77 mm (3.0 in) over the course of 11 days.

September Precipitation Trends in Sainte-Croix

The chart displays monthly precipitation patterns in Sainte-Croix, 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 Sainte-Croix, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9488911191061171181177714812887
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sainte-Croix

In Sainte-Croix in September humidity is 78%. With an average temperature of 16°C (60°F), this humidity feels like a damp embrace, making travel a bit uncomfortable as the air clings to your skin and leaves you feeling sticky.

September Average Humidity in Sainte-Croix

This chart illustrates the average monthly humidity levels in Sainte-Croix, 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 Sainte-Croix 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 Sainte-Croix

In Sainte-Croix 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 Sainte-Croix.

Maximum UV Index Levels in Sainte-Croix for September

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

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

This table compares monthly weather conditions in Sainte-Croix, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)94 mm (3.7 inches)93%low
February Weather-6°C (21°F)88 mm (3.5 inches)92%moderate
March Weather-2°C (29°F)91 mm (3.6 inches)86%moderate
April Weather6°C (43°F)119 mm (4.7 inches)85%high
May Weather13°C (56°F)106 mm (4.2 inches)80%very high
June Weather18°C (65°F)117 mm (4.6 inches)74%very high
July Weather21°C (70°F)118 mm (4.7 inches)76%very high
August Weather20°C (68°F)117 mm (4.6 inches)75%very high
September Weather16°C (60°F)77 mm (3.0 inches)78%high
October Weather10°C (49°F)148 mm (5.8 inches)86%moderate
November Weather1°C (34°F)128 mm (5.0 inches)88%moderate
December Weather-5°C (24°F)87 mm (3.4 inches)89%low

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