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September Weather in Watson Lake, Canada

Last updated: June 18, 2025

In Watson Lake, Canada, the average temperature in September hovers around 9°C (48°F). However, be prepared for a range of temperatures, with minimums dipping to -7°C (20°F) and maximums soaring up to 28°C (82°F). Expect about 32 mm (1.3 in) of precipitation over 8 days, contributing to a high average humidity of 89%.

September Temperature in Watson Lake

In September, in Watson Lake, the average temperature is 9°C (48°F). Maximum temperatures can reach up to 28°C (82°F), while minimums can drop as low as -7°C (20°F). Travelers should prepare for a wide range of temperatures and pack accordingly.

September Weather in Watson Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Watson Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Watson Lake, September typically has an average temperature of 9°C (48°F), with highs reaching up to 28°C (82°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec-121732495862584834111
Data source: Temperature data for Watson Lake 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 Watson Lake

In Watson Lake in September, the precipitation amount is 32 mm (1.3 in) over the course of 8 days.

September Precipitation Trends in Watson Lake

The chart displays monthly precipitation patterns in Watson Lake, 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 Watson Lake, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec262429203472547932415031
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Watson Lake

In Watson Lake in September humidity is 89%. With an average temperature of 9°C (48°F), this humidity feels like a chill that lingers in the air, wrapping around you like a damp blanket, making outdoor activities challenging and encouraging a cozy retreat indoors.

September Average Humidity in Watson Lake

This chart illustrates the average monthly humidity levels in Watson Lake, 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 Watson Lake is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%96%94%93%89%86%84%89%89%94%98%98%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Watson Lake

In Watson Lake in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Watson Lake for better planning.

Maximum UV Index Levels in Watson Lake for September

The chart shows the monthly maximum UV Index (UVI) for Watson Lake 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 Watson Lake typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123466764211
Data source: Watson Lake 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 Watson Lake Compares to Other Months

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

This table compares monthly weather conditions in Watson Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-18°C (-1°F)26 mm (1.0 inches)96%low
February Weather-17°C (2°F)24 mm (0.9 inches)96%low
March Weather-8°C (17°F)28 mm (1.1 inches)94%moderate
April Weather0°C (32°F)20 mm (0.8 inches)93%moderate
May Weather9°C (49°F)34 mm (1.4 inches)89%high
June Weather14°C (58°F)72 mm (2.8 inches)86%high
July Weather16°C (62°F)54 mm (2.1 inches)84%high
August Weather14°C (58°F)78 mm (3.1 inches)89%high
September Weather9°C (48°F)32 mm (1.3 inches)89%moderate
October Weather1°C (34°F)40 mm (1.6 inches)94%low
November Weather-12°C (11°F)50 mm (2.0 inches)98%low
December Weather-17°C (1°F)31 mm (1.2 inches)98%low

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