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September Weather in Cranbrook, Canada

Last updated: June 18, 2025

In Cranbrook, Canada during the month of September, the average temperature hovers around 12°C (55°F). While temperatures can dip to a chilly -2°C (28°F), they can also soar up to a warm 31°C (88°F). You'll experience an average precipitation of 38 mm (1.5 in) spread over 6 days, with humidity levels reaching around 71%. Come prepared for a mix of weather!

September Temperature in Cranbrook

In September in Cranbrook, the average temperature is 12°C (55°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as -2°C (28°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates September temperature patterns in Cranbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cranbrook, September typically has an average temperature of 12°C (55°F), with highs reaching up to 31°C (88°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec211731395058666554393223
Data source: Temperature data for Cranbrook 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 Cranbrook

In Cranbrook in September, the total precipitation amount is 38 mm (1.5 in) spread over 6 days.

September Precipitation Trends in Cranbrook

The chart displays monthly precipitation patterns in Cranbrook, 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 Cranbrook, September typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec445648534750232938515769
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cranbrook

In Cranbrook in September, humidity is 71%. With an average temperature of 12°C (55°F), this humidity feels like a damp chill that permeates your clothing, making it essential to wear layers when traveling.

September Average Humidity in Cranbrook

This chart illustrates the average monthly humidity levels in Cranbrook, 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 Cranbrook is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%93%91%88%83%80%82%71%71%85%90%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cranbrook

In Cranbrook 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 Cranbrook.

Maximum UV Index Levels in Cranbrook for September

The chart shows the monthly maximum UV Index (UVI) for Cranbrook 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 Cranbrook typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987421
Data source: Cranbrook 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 Cranbrook Compares to Other Months

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

This table compares monthly weather conditions in Cranbrook, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)44 mm (1.7 inches)95%low
February Weather-8°C (17°F)56 mm (2.2 inches)93%moderate
March Weather-1°C (31°F)48 mm (1.9 inches)91%moderate
April Weather4°C (39°F)53 mm (2.1 inches)88%high
May Weather10°C (51°F)47 mm (1.9 inches)83%very high
June Weather15°C (59°F)50 mm (2.0 inches)80%very high
July Weather19°C (66°F)23 mm (0.9 inches)82%very high
August Weather18°C (65°F)29 mm (1.1 inches)71%very high
September Weather12°C (55°F)38 mm (1.5 inches)71%high
October Weather4°C (40°F)51 mm (2.0 inches)85%moderate
November Weather0°C (32°F)57 mm (2.3 inches)90%low
December Weather-5°C (23°F)69 mm (2.7 inches)96%low

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