September Weather in Swift Trail Junction, United States

Last updated: June 24, 2025

In September, the average temperature in Swift Trail Junction, United States is a pleasant 25°C (77°F). Expect a range from a cool 11°C (52°F) to a sweltering 37°C (100°F). The region experiences an average precipitation of 38 mm (1.5 in) spread over 5 days, and the average humidity hovers around 66%. Enjoy the diverse climate this month brings!

September Temperature in Swift Trail Junction

In September in Swift Trail Junction, the average temperature is 25°C (77°F). Maximum temperatures can reach 37°C (100°F), while minimums can dip as low as 11°C (52°F). This diverse range of temperatures makes it an ideal time for travelers to pack both light clothing for the warmth and warmer items for the cooler evenings.

September Weather in Swift Trail Junction: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Swift Trail Junction, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swift Trail Junction, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (100°F) and lows dropping to around 11°C (52°F).

Data source: Temperature data for Swift Trail Junction generated using information from the Copernicus Climate Change Service.

September Precipitation in Swift Trail Junction

In Swift Trail Junction in September, the total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 days.

September Precipitation Trends in Swift Trail Junction

The chart displays monthly precipitation patterns in Swift Trail Junction, 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 Swift Trail Junction, September typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Swift Trail Junction

In Swift Trail Junction in September humidity is 66%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making travel a pleasant experience as the air is saturated but still breathable, allowing for comfortable exploration.

September Average Humidity in Swift Trail Junction

This chart illustrates the average monthly humidity levels in Swift Trail Junction, 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 Swift Trail Junction is approximately 66%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Swift Trail Junction

In Swift Trail Junction in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Swift Trail Junction.

Maximum UV Index Levels in Swift Trail Junction for September

The chart shows the monthly maximum UV Index (UVI) for Swift Trail Junction 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 Swift Trail Junction typically reaches 11, which falls under the extreme exposure category.

Data source: Swift Trail Junction 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 Swift Trail Junction Compares to Other Months

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

This table compares monthly weather conditions in Swift Trail Junction, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	30 mm (1.2 inches)	81%	moderate
February Weather	9°C (49°F)	38 mm (1.5 inches)	82%	high
March Weather	13°C (56°F)	24 mm (1.0 inches)	68%	very high
April Weather	19°C (66°F)	3 mm (0.1 inches)	55%	extreme
May Weather	23°C (73°F)	4 mm (0.2 inches)	45%	extreme
June Weather	28°C (83°F)	6 mm (0.2 inches)	37%	extreme
July Weather	28°C (83°F)	54 mm (2.1 inches)	43%	extreme
August Weather	28°C (82°F)	32 mm (1.3 inches)	53%	extreme
September Weather	25°C (77°F)	38 mm (1.5 inches)	66%	extreme
October Weather	19°C (66°F)	19 mm (0.8 inches)	72%	very high
November Weather	14°C (57°F)	21 mm (0.8 inches)	81%	high
December Weather	8°C (47°F)	29 mm (1.1 inches)	84%	moderate