September Weather in Logan, United States

Last updated: June 24, 2025

In Logan, United States, the average temperature in September sits at a comfortable 21°C (70°F). However, temperatures can vary significantly, with a minimum of 5°C (42°F) and soaring up to a maximum of 36°C (97°F). Expect some rain, as the area receives about 104 mm (4.1 in) of precipitation over 9 days. The air is quite humid too, with an average humidity of 73%—perfect for those who enjoy a balmy climate!

September Temperature in Logan

In September in Logan, the average temperature is 21°C (70°F). Maximum temperatures can reach 36°C (97°F), while the minimum can drop as low as 5°C (42°F). Travelers should be prepared for a wide range of weather conditions, ensuring they pack both warm and light clothing.

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 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (42°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 104 mm (4.1 in) over the course 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 104 mm (4.1 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 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade 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 73%, 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	0°C (33°F)	89 mm (3.5 inches)	88%	moderate
February Weather	2°C (36°F)	123 mm (4.8 inches)	88%	moderate
March Weather	7°C (44°F)	129 mm (5.1 inches)	87%	high
April Weather	12°C (53°F)	139 mm (5.5 inches)	85%	very high
May Weather	18°C (64°F)	133 mm (5.2 inches)	81%	very high
June Weather	22°C (72°F)	157 mm (6.2 inches)	82%	very high
July Weather	24°C (76°F)	127 mm (5.0 inches)	81%	very high
August Weather	23°C (74°F)	113 mm (4.4 inches)	73%	very high
September Weather	21°C (70°F)	104 mm (4.1 inches)	73%	very high
October Weather	15°C (59°F)	110 mm (4.3 inches)	78%	high
November Weather	6°C (43°F)	97 mm (3.8 inches)	89%	moderate
December Weather	3°C (38°F)	113 mm (4.4 inches)	87%	moderate