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September Weather in Fort Benton, United States

Last updated: June 24, 2025

In September, the average temperature in Fort Benton, United States is a comfortable 16°C (60°F). Expect a range from a chilly -1°C (30°F) to a sizzling 36°C (97°F). Precipitation is relatively low, with about 30 mm (1.2 in) spread over 6 days, while humidity hovers around a moderate 68%.

September Temperature in Fort Benton

In September in Fort Benton, the average temperature is 16°C (60°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as -1°C (30°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!

September Weather in Fort Benton: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fort Benton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Benton, September typically has an average temperature of 16°C (60°F), with highs reaching up to 36°C (97°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec261934435566747160453729
Data source: Temperature data for Fort Benton 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 Fort Benton

In Fort Benton in September, the total precipitation amount is 30 mm (1.2 in) spread across 6 days.

September Precipitation Trends in Fort Benton

The chart displays monthly precipitation patterns in Fort Benton, 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 Fort Benton, September typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec174123535656131830333126
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Benton

In Fort Benton in September, humidity is 68%. With an average temperature of 16°C (60°F), this humidity feels like a warm embrace, making traveling slightly more strenuous as the air thickens around you, prompting you to stay hydrated and take breaks in cooler, shaded areas.

September Average Humidity in Fort Benton

This chart illustrates the average monthly humidity levels in Fort Benton, 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 Fort Benton is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Benton

In Fort Benton 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 Fort Benton.

Maximum UV Index Levels in Fort Benton for September

The chart shows the monthly maximum UV Index (UVI) for Fort Benton 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 Fort Benton typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Fort Benton 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 Fort Benton Compares to Other Months

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

This table compares monthly weather conditions in Fort Benton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)17 mm (0.7 inches)87%low
February Weather-7°C (19°F)41 mm (1.6 inches)88%moderate
March Weather1°C (34°F)23 mm (0.9 inches)83%moderate
April Weather6°C (43°F)53 mm (2.1 inches)78%high
May Weather13°C (56°F)56 mm (2.2 inches)76%very high
June Weather19°C (66°F)56 mm (2.2 inches)78%very high
July Weather23°C (74°F)13 mm (0.5 inches)77%very high
August Weather22°C (71°F)18 mm (0.7 inches)71%very high
September Weather16°C (60°F)30 mm (1.2 inches)68%high
October Weather7°C (45°F)33 mm (1.3 inches)72%moderate
November Weather3°C (38°F)31 mm (1.2 inches)84%moderate
December Weather-2°C (29°F)26 mm (1.0 inches)90%low

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