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September Weather in Deer Lodge, United States

Last updated: June 24, 2025

In September, the average temperature in Deer Lodge, United States hovers around 12°C (54°F). Expect a minimum of -5°C (24°F) and a maximum of 32°C (89°F). During this time, precipitation averages 34 mm (1.3 in) spread over 6 days, while the air carries an average humidity of 67%.

September Temperature in Deer Lodge

In September in Deer Lodge, the average temperature is 12°C (54°F). Maximum temperatures can reach 32°C (89°F), while minimums can drop as low as -5°C (24°F). Travelers should be prepared for a wide range of weather conditions, ensuring they pack both lightweight clothing for warmer days and warmer layers for cooler nights.

September Weather in Deer Lodge: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Deer Lodge, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deer Lodge, September typically has an average temperature of 12°C (54°F), with highs reaching up to 32°C (89°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec191829354757666454392820
Data source: Temperature data for Deer Lodge 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 Deer Lodge

In Deer Lodge in September, the total precipitation amount is 34 mm (1.3 in) spread over 6 days.

September Precipitation Trends in Deer Lodge

The chart displays monthly precipitation patterns in Deer Lodge, 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 Deer Lodge, September typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec266241607387172134453839
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Deer Lodge

In Deer Lodge in September, humidity is 67%. With an average temperature of 12°C (54°F), this humidity feels like a cool, damp blanket wrapping around you, making it essential to layer your clothing for comfort while exploring.

September Average Humidity in Deer Lodge

This chart illustrates the average monthly humidity levels in Deer Lodge, 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 Deer Lodge 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 Deer Lodge

In Deer Lodge 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 Deer Lodge.

Maximum UV Index Levels in Deer Lodge for September

The chart shows the monthly maximum UV Index (UVI) for Deer Lodge 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 Deer Lodge typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098532
Data source: Deer Lodge 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 Deer Lodge Compares to Other Months

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

This table compares monthly weather conditions in Deer Lodge, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)26 mm (1.0 inches)93%moderate
February Weather-8°C (18°F)62 mm (2.5 inches)92%moderate
March Weather-2°C (29°F)41 mm (1.6 inches)89%high
April Weather2°C (35°F)60 mm (2.4 inches)85%very high
May Weather8°C (47°F)73 mm (2.9 inches)80%very high
June Weather14°C (57°F)87 mm (3.4 inches)78%extreme
July Weather19°C (66°F)17 mm (0.7 inches)77%very high
August Weather18°C (64°F)21 mm (0.8 inches)66%very high
September Weather12°C (54°F)34 mm (1.3 inches)67%very high
October Weather4°C (39°F)45 mm (1.8 inches)77%moderate
November Weather-2°C (29°F)38 mm (1.5 inches)89%moderate
December Weather-7°C (20°F)39 mm (1.5 inches)95%low

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