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September Weather in Lillooet, Canada

Last updated: June 18, 2025

In September, the average temperature in Lillooet, Canada hovers around 10°C (50°F), with a minimum of -4°C (26°F) and a maximum reaching 27°C (80°F). Expect 69 mm (2.7 in) of precipitation spread over 11 days, contributing to an average humidity of 83%. Perfect for cozy indoor activities or a brisk outdoor adventure!

September Temperature in Lillooet

In September in Lillooet, the average temperature is 10°C (50°F), with maximums reaching 27°C (80°F) and minimums dropping as low as -4°C (26°F). It's advisable to pack for a range of weather conditions when traveling during this time.

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

The chart illustrates September temperature patterns in Lillooet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lillooet, September typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (80°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec191829364754606050372919
Data source: Temperature data for Lillooet 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 Lillooet

In Lillooet in September, the total precipitation amount is 69 mm (2.7 in) spread across 11 days.

September Precipitation Trends in Lillooet

The chart displays monthly precipitation patterns in Lillooet, 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 Lillooet, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7467484738493840699011088
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lillooet

In Lillooet in September, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

September Average Humidity in Lillooet

This chart illustrates the average monthly humidity levels in Lillooet, 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 Lillooet is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%91%89%85%83%86%82%83%89%93%97%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lillooet

In Lillooet 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 Lillooet.

Maximum UV Index Levels in Lillooet for September

The chart shows the monthly maximum UV Index (UVI) for Lillooet 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 Lillooet typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987421
Data source: Lillooet 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 Lillooet Compares to Other Months

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

This table compares monthly weather conditions in Lillooet, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)74 mm (2.9 inches)93%low
February Weather-8°C (18°F)67 mm (2.6 inches)91%moderate
March Weather-2°C (29°F)48 mm (1.9 inches)91%moderate
April Weather2°C (36°F)47 mm (1.9 inches)89%high
May Weather8°C (47°F)38 mm (1.5 inches)85%very high
June Weather12°C (54°F)49 mm (1.9 inches)83%very high
July Weather16°C (60°F)38 mm (1.5 inches)86%very high
August Weather15°C (60°F)40 mm (1.6 inches)82%very high
September Weather10°C (50°F)69 mm (2.7 inches)83%high
October Weather3°C (37°F)90 mm (3.5 inches)89%moderate
November Weather-2°C (29°F)110 mm (4.3 inches)93%low
December Weather-7°C (19°F)88 mm (3.5 inches)97%low

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