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September Weather in Fort Hall, United States

Last updated: June 24, 2025

In September, the average temperature in Fort Hall, United States is a comfortable 17°C (63°F). However, you might experience a range as low as 1°C (35°F) and soaring up to 37°C (98°F). During this time, expect about 25 mm (1.0 in) of precipitation spread over 3 days. With an average humidity of 46%, it's a great time to enjoy the pleasant weather!

September Temperature in Fort Hall

In September in Fort Hall, the average temperature is 17°C (63°F). Maximums can reach 37°C (98°F), while minimums can drop as low as 1°C (35°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Fort Hall, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Hall, September typically has an average temperature of 17°C (63°F), with highs reaching up to 37°C (98°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec263039475667767363473728
Data source: Temperature data for Fort Hall 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 Hall

In Fort Hall in September, the precipitation amount is 25 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Fort Hall

The chart displays monthly precipitation patterns in Fort Hall, 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 Hall, September typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec41514546462391325352742
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fort Hall

In Fort Hall in September, humidity is 46%. With an average temperature of 17°C (63°F), this humidity feels like a mild embrace—comfortable for exploring the sights, though you might notice a slight heaviness in the air that encourages a leisurely pace as you take in the vibrant surroundings.

September Average Humidity in Fort Hall

This chart illustrates the average monthly humidity levels in Fort Hall, 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 Hall is approximately 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%85%76%66%62%53%42%46%64%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fort Hall

In Fort Hall in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Fort Hall.

Maximum UV Index Levels in Fort Hall for September

The chart shows the monthly maximum UV Index (UVI) for Fort Hall 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 Hall typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Fort Hall 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 Hall Compares to Other Months

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

This table compares monthly weather conditions in Fort Hall, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)41 mm (1.6 inches)91%moderate
February Weather-1°C (30°F)51 mm (2.0 inches)92%moderate
March Weather4°C (39°F)45 mm (1.8 inches)85%high
April Weather8°C (47°F)46 mm (1.8 inches)76%very high
May Weather13°C (56°F)46 mm (1.8 inches)66%very high
June Weather19°C (67°F)23 mm (0.9 inches)62%extreme
July Weather24°C (76°F)9 mm (0.3 inches)53%extreme
August Weather23°C (73°F)13 mm (0.5 inches)42%very high
September Weather17°C (63°F)25 mm (1.0 inches)46%very high
October Weather8°C (47°F)34 mm (1.4 inches)64%high
November Weather3°C (38°F)27 mm (1.1 inches)83%moderate
December Weather-2°C (28°F)42 mm (1.6 inches)87%moderate

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