September Weather in Logan, United States

Last updated: June 24, 2025

In September, the average temperature in Logan, United States is a comfortable 20°C (69°F). Expect a minimum chill of 3°C (38°F) and a sizzling maximum of 36°C (96°F). With an average humidity of 75%, the weather feels quite humid, complemented by 89 mm (3.5 in) of precipitation spread over 9 days. Plan accordingly for a mix of warm days and the occasional shower!

September Temperature in Logan

In September in Logan, the average temperature is 20°C (69°F). Maximum can reach 36°C (96°F) and minimum can be as low as 3°C (38°F). Be sure to pack both light clothing for warm days and layers for cooler evenings while traveling to Logan during this time.

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

The chart illustrates September temperature patterns in Logan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Logan, September typically has an average temperature of 20°C (69°F), with highs reaching up to 36°C (96°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Logan

In Logan in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

September Precipitation Trends in Logan

The chart displays monthly precipitation patterns in Logan, 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 Logan, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 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 Logan

In Logan in September, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

September Average Humidity in Logan

This chart illustrates the average monthly humidity levels in Logan, 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 Logan is approximately 75%, 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 Logan

In Logan in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Logan.

Maximum UV Index Levels in Logan for September

The chart shows the monthly maximum UV Index (UVI) for Logan 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 Logan typically reaches 8, which falls under the very high exposure category.

Data source: Logan 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 Logan Compares to Other Months

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

This table compares monthly weather conditions in Logan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	29 mm (1.1 inches)	76%	moderate
February Weather	-5°C (24°F)	35 mm (1.4 inches)	80%	moderate
March Weather	4°C (40°F)	86 mm (3.4 inches)	73%	high
April Weather	9°C (49°F)	63 mm (2.5 inches)	74%	very high
May Weather	17°C (62°F)	159 mm (6.2 inches)	78%	very high
June Weather	24°C (75°F)	115 mm (4.5 inches)	82%	very high
July Weather	25°C (77°F)	65 mm (2.5 inches)	83%	very high
August Weather	23°C (74°F)	117 mm (4.6 inches)	80%	very high
September Weather	20°C (69°F)	89 mm (3.5 inches)	75%	very high
October Weather	11°C (52°F)	112 mm (4.4 inches)	75%	high
November Weather	4°C (39°F)	31 mm (1.2 inches)	82%	moderate
December Weather	-1°C (30°F)	39 mm (1.5 inches)	83%	low