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September Weather in Fort Duchesne, United States

Last updated: June 24, 2025

In Fort Duchesne, United States, the average temperature in September hovers around 20°C (69°F). However, temperatures can vary significantly, reaching a minimum of 2°C (36°F) at night and soaring to a maximum of 38°C (101°F) during the day. Expect a modest 15 mm (0.6 in) of precipitation spread over roughly 2 days, while the average humidity remains comfortable at 50%.

September Temperature in Fort Duchesne

In September in Fort Duchesne, the average temperature is 20°C (69°F). Maximum can reach 38°C (101°F) and minimum can be as low as 2°C (36°F). It's a diverse climate, so be prepared for both warm days and cooler nights when traveling.

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

The chart illustrates September temperature patterns in Fort Duchesne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Duchesne, September typically has an average temperature of 20°C (69°F), with highs reaching up to 38°C (101°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec263244526275827969504030
Data source: Temperature data for Fort Duchesne 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 Duchesne

In Fort Duchesne in September, the precipitation amount is 15 mm (0.6 in) over the course of 2 days.

September Precipitation Trends in Fort Duchesne

The chart displays monthly precipitation patterns in Fort Duchesne, 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 Duchesne, September typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec23263217201061015271320
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Duchesne

In Fort Duchesne in September humidity is 50%. With an average temperature of 20°C (69°F), this humidity feels like a mild embrace, making it comfortable for leisurely strolls and outdoor adventures.

September Average Humidity in Fort Duchesne

This chart illustrates the average monthly humidity levels in Fort Duchesne, 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 Duchesne is approximately 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%93%85%73%64%57%45%41%50%70%84%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Duchesne

In Fort Duchesne in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Fort Duchesne.

Maximum UV Index Levels in Fort Duchesne for September

The chart shows the monthly maximum UV Index (UVI) for Fort Duchesne 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 Duchesne typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec368101112121110753
Data source: Fort Duchesne 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 Duchesne Compares to Other Months

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

This table compares monthly weather conditions in Fort Duchesne, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)23 mm (0.9 inches)92%moderate
February Weather0°C (32°F)26 mm (1.0 inches)93%high
March Weather6°C (44°F)32 mm (1.3 inches)85%very high
April Weather11°C (53°F)17 mm (0.7 inches)73%very high
May Weather17°C (63°F)20 mm (0.8 inches)64%extreme
June Weather24°C (75°F)10 mm (0.4 inches)57%extreme
July Weather28°C (82°F)6 mm (0.3 inches)45%extreme
August Weather26°C (79°F)10 mm (0.4 inches)41%extreme
September Weather20°C (69°F)15 mm (0.6 inches)50%very high
October Weather10°C (50°F)27 mm (1.0 inches)70%high
November Weather5°C (41°F)13 mm (0.5 inches)84%moderate
December Weather-1°C (30°F)20 mm (0.8 inches)90%moderate

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