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September Weather in Seeley Lake, United States

Last updated: June 24, 2025

In September, the average temperature in Seeley Lake, United States is a mild 11°C (53°F). However, temperatures can vary significantly, with a minimum of -6°C (22°F) and a maximum of 30°C (86°F). Expect around 50 mm (2.0 in) of precipitation spread over 8 days, accompanied by an average humidity of 67%.

September Temperature in Seeley Lake

In September in Seeley Lake, the average temperature is 11°C (53°F). Maximum temperatures can reach up to 30°C (86°F), while the minimum can dip as low as -6°C (22°F). This variability makes it essential for travelers to pack layers to adapt to changing weather conditions.

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

The chart illustrates September temperature patterns in Seeley Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seeley Lake, September typically has an average temperature of 11°C (53°F), with highs reaching up to 30°C (86°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec201729344455646252362721
Data source: Temperature data for Seeley 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 Seeley Lake

In Seeley Lake in September, the total precipitation amount is 50 mm (2.0 in) spread over 8 days.

September Precipitation Trends in Seeley Lake

The chart displays monthly precipitation patterns in Seeley 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 Seeley Lake, September typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7012579958288233050969498
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Seeley Lake

In Seeley Lake in September humidity is 67%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities less enjoyable, often leading travelers to seek refuge indoors or dress in layers to stay comfortable.

September Average Humidity in Seeley Lake

This chart illustrates the average monthly humidity levels in Seeley 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 Seeley Lake is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Seeley Lake

In Seeley Lake in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Seeley Lake.

Maximum UV Index Levels in Seeley Lake for September

The chart shows the monthly maximum UV Index (UVI) for Seeley 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 Seeley Lake typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246810101098532
Data source: Seeley 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 Seeley Lake Compares to Other Months

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

This table compares monthly weather conditions in Seeley Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)70 mm (2.7 inches)93%low
February Weather-8°C (18°F)125 mm (4.9 inches)92%moderate
March Weather-2°C (29°F)78 mm (3.1 inches)89%high
April Weather1°C (34°F)95 mm (3.7 inches)85%very high
May Weather7°C (44°F)82 mm (3.2 inches)80%very high
June Weather13°C (55°F)88 mm (3.5 inches)78%very high
July Weather18°C (64°F)23 mm (0.9 inches)77%very high
August Weather17°C (63°F)30 mm (1.2 inches)66%very high
September Weather11°C (53°F)50 mm (2.0 inches)67%very high
October Weather2°C (37°F)96 mm (3.8 inches)77%moderate
November Weather-3°C (27°F)94 mm (3.7 inches)89%moderate
December Weather-6°C (21°F)98 mm (3.9 inches)95%low

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