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September Weather in Stevensville, United States

Last updated: June 24, 2025

In September, the average temperature in Stevensville, United States is a comfortable 14°C (57°F). Temperatures can range from a chilly -2°C (28°F) to a warm 34°C (93°F), offering a varied climate experience. Expect about 33 mm (1.3 in) of precipitation over 6 days, contributing to an average humidity level of 67%.

September Temperature in Stevensville

In September in Stevensville, the average temperature is 14°C (57°F). Maximums can reach 34°C (93°F) and minimums can be as low as -2°C (28°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Stevensville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stevensville, September typically has an average temperature of 14°C (57°F), with highs reaching up to 34°C (93°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec252334405059696757423327
Data source: Temperature data for Stevensville 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 Stevensville

In Stevensville, in September, the precipitation amount is 33 mm (1.3 in) over the course of 6 days.

September Precipitation Trends in Stevensville

The chart displays monthly precipitation patterns in Stevensville, 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 Stevensville, September typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec429357777178162033635765
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stevensville

In Stevensville in September, humidity is 67%. With an average temperature of 14°C (57°F), this humidity feels like a cool, refreshing mist that invigorates your senses, making it quite pleasant for traveling, though a light jacket is recommended as the moisture in the air can create a brisk atmosphere.

September Average Humidity in Stevensville

This chart illustrates the average monthly humidity levels in Stevensville, 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 Stevensville 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 Stevensville

In Stevensville 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 Stevensville.

Maximum UV Index Levels in Stevensville for September

The chart shows the monthly maximum UV Index (UVI) for Stevensville 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 Stevensville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098532
Data source: Stevensville 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 Stevensville Compares to Other Months

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

This table compares monthly weather conditions in Stevensville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)42 mm (1.6 inches)93%moderate
February Weather-5°C (23°F)93 mm (3.7 inches)92%moderate
March Weather1°C (34°F)57 mm (2.3 inches)89%high
April Weather4°C (40°F)77 mm (3.0 inches)85%very high
May Weather10°C (50°F)71 mm (2.8 inches)80%very high
June Weather15°C (59°F)78 mm (3.1 inches)78%very high
July Weather20°C (69°F)16 mm (0.6 inches)77%very high
August Weather19°C (67°F)20 mm (0.8 inches)66%very high
September Weather14°C (57°F)33 mm (1.3 inches)67%very high
October Weather5°C (42°F)63 mm (2.5 inches)77%moderate
November Weather1°C (34°F)57 mm (2.3 inches)89%moderate
December Weather-3°C (27°F)65 mm (2.6 inches)95%low

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