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September Weather in Thompson, Canada

Last updated: June 18, 2025

In September, the average temperature in Thompson, Canada is a crisp 9°C (49°F). Expect a temperature range that can dip to a chilly -7°C (20°F) or soar to 25°C (78°F). With 64 mm (2.5 in) of precipitation over 11 days, don't forget your umbrella! Additionally, the air tends to be quite moist, boasting an average humidity of 86%.

September Temperature in Thompson

In September in Thompson, the average temperature is 9°C (49°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -7°C (20°F). Be prepared for a wide range of temperatures while traveling, ensuring you pack accordingly for both warm and chilly days.

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

The chart illustrates September temperature patterns in Thompson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thompson, September typically has an average temperature of 9°C (49°F), with highs reaching up to 25°C (78°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec-5-7122642576460483411-2
Data source: Temperature data for Thompson 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 Thompson

In Thompson in September, the total precipitation amount is 64 mm (2.5 in) spread over 11 days.

September Precipitation Trends in Thompson

The chart displays monthly precipitation patterns in Thompson, 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 Thompson, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec2614314042921128864494327
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Thompson

In Thompson in September, humidity is 86%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill in the air, making travel uncomfortable as the moisture clings to your skin and thickens the atmosphere, creating a sense of heaviness that can tire you quickly.

September Average Humidity in Thompson

This chart illustrates the average monthly humidity levels in Thompson, 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 Thompson is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%94%94%86%78%67%83%85%86%89%88%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Thompson

In Thompson 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 Thompson.

Maximum UV Index Levels in Thompson for September

The chart shows the monthly maximum UV Index (UVI) for Thompson 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 Thompson typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568765311
Data source: Thompson 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 Thompson Compares to Other Months

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

This table compares monthly weather conditions in Thompson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-21°C (-5°F)26 mm (1.0 inches)96%low
February Weather-21°C (-6°F)14 mm (0.5 inches)94%low
March Weather-11°C (12°F)31 mm (1.2 inches)93%moderate
April Weather-4°C (26°F)40 mm (1.6 inches)86%moderate
May Weather6°C (43°F)42 mm (1.7 inches)78%high
June Weather14°C (57°F)92 mm (3.6 inches)67%very high
July Weather18°C (65°F)112 mm (4.4 inches)83%high
August Weather15°C (60°F)88 mm (3.4 inches)85%high
September Weather9°C (49°F)64 mm (2.5 inches)86%moderate
October Weather1°C (34°F)49 mm (1.9 inches)89%moderate
November Weather-12°C (11°F)43 mm (1.7 inches)88%low
December Weather-19°C (-2°F)27 mm (1.0 inches)96%low

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