September Weather in Linn, United States

Last updated: June 24, 2025

In September, the average temperature in Linn, United States is a warm 29°C (84°F), with minimums dipping to 17°C (63°F) and maximums soaring up to 39°C (103°F). Expect a total precipitation of 98 mm (3.9 in) spread over approximately 13 days, coupled with an average humidity of 73%—perfect for lush landscapes!

September Temperature in Linn

In September in Linn, the average temperature is 29°C (84°F), making it a warm destination. The maximum can reach up to 39°C (103°F), while the minimum can drop to as low as 17°C (63°F). Be prepared for a range of temperatures to ensure a comfortable trip.

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

The chart illustrates September temperature patterns in Linn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Linn, September typically has an average temperature of 29°C (84°F), with highs reaching up to 39°C (103°F) and lows dropping to around 17°C (63°F).

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

September Precipitation in Linn

In Linn in September, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.

September Precipitation Trends in Linn

The chart displays monthly precipitation patterns in Linn, 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 Linn, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Linn

In Linn in September, humidity is 73%. With an average temperature of 29°C (84°F), this humidity feels like a warm blanket wrapped around you, making travel slightly uncomfortable as you sweat and seek shade, yet still inviting you to explore the vibrant local culture and activities.

September Average Humidity in Linn

This chart illustrates the average monthly humidity levels in Linn, 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 Linn 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 Linn

In Linn 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 Linn.

Maximum UV Index Levels in Linn for September

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

Data source: Linn 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 Linn Compares to Other Months

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

This table compares monthly weather conditions in Linn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	23 mm (0.9 inches)	83%	high
February Weather	18°C (65°F)	21 mm (0.8 inches)	79%	very high
March Weather	22°C (72°F)	36 mm (1.4 inches)	76%	very high
April Weather	25°C (77°F)	34 mm (1.3 inches)	77%	extreme
May Weather	28°C (82°F)	102 mm (4.0 inches)	80%	extreme
June Weather	29°C (85°F)	99 mm (3.9 inches)	73%	extreme
July Weather	30°C (86°F)	97 mm (3.8 inches)	66%	extreme
August Weather	31°C (88°F)	31 mm (1.2 inches)	65%	extreme
September Weather	29°C (84°F)	98 mm (3.9 inches)	73%	extreme
October Weather	25°C (77°F)	56 mm (2.2 inches)	76%	very high
November Weather	20°C (69°F)	31 mm (1.2 inches)	80%	high
December Weather	18°C (64°F)	24 mm (0.9 inches)	86%	high