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September Weather in Bigfork, United States

Last updated: June 24, 2025

In September, the average temperature in Bigfork, United States hovers around 14°C (58°F). Be prepared for a range, as temperatures can drop to a chilly 0°C (32°F) or rise to a warm 30°C (85°F). Expect about 59 mm (2.3 in) of precipitation spread over approximately 9 days, accompanied by an average humidity level of 67%.

September Temperature in Bigfork

In September in Bigfork, the average temperature is 14°C (58°F). Maximums can reach 30°C (85°F), while minimums can drop as low as 0°C (32°F). Be prepared for a wide range of temperatures, making it ideal to pack layers for your trip.

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

The chart illustrates September temperature patterns in Bigfork, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bigfork, September typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (85°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec282332384856666658443631
Data source: Temperature data for Bigfork 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 Bigfork

In Bigfork in September, the precipitation amount is 59 mm (2.3 in) over the course of 9 days.

September Precipitation Trends in Bigfork

The chart displays monthly precipitation patterns in Bigfork, 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 Bigfork, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec691036482696418285991101102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bigfork

In Bigfork in September, humidity is 67%. With an average temperature of 14°C (58°F), this humidity feels like a damp blanket enveloping you, making travel a bit uncomfortable as you navigate through the moist air.

September Average Humidity in Bigfork

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

In Bigfork 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 Bigfork.

Maximum UV Index Levels in Bigfork for September

The chart shows the monthly maximum UV Index (UVI) for Bigfork 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 Bigfork typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246799997532
Data source: Bigfork 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 Bigfork Compares to Other Months

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

This table compares monthly weather conditions in Bigfork, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)69 mm (2.7 inches)93%low
February Weather-5°C (23°F)103 mm (4.1 inches)92%moderate
March Weather0°C (32°F)64 mm (2.5 inches)89%high
April Weather4°C (39°F)82 mm (3.2 inches)85%high
May Weather9°C (49°F)69 mm (2.7 inches)80%very high
June Weather14°C (57°F)63 mm (2.5 inches)78%very high
July Weather19°C (66°F)18 mm (0.7 inches)77%very high
August Weather19°C (67°F)27 mm (1.1 inches)66%very high
September Weather14°C (58°F)59 mm (2.3 inches)67%high
October Weather7°C (45°F)91 mm (3.6 inches)77%moderate
November Weather2°C (37°F)101 mm (4.0 inches)89%moderate
December Weather-1°C (31°F)102 mm (4.0 inches)95%low

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