September Weather in Clarion, United States

Last updated: June 24, 2025

In Clarion, United States, the average temperature in September hovers around 19°C (67°F), with minimums as low as 3°C (38°F) and maximums peaking at 34°C (93°F). Expect around 122 mm (4.8 in) of precipitation over approximately 10 days, accompanied by an average humidity level of 75%. Perfect for those who enjoy a mild, yet slightly moist climate!

September Temperature in Clarion

In September in Clarion, the average temperature is 19°C (67°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 3°C (38°F). This climate makes it an ideal destination for travelers seeking a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Clarion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clarion, September typically has an average temperature of 19°C (67°F), with highs reaching up to 34°C (93°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Clarion

In Clarion in September, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 days.

September Precipitation Trends in Clarion

The chart displays monthly precipitation patterns in Clarion, 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 Clarion, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 10 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 Clarion

In Clarion in September humidity is 75%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel invigorating yet slightly sticky, as you navigate through the vibrant streets or scenic landscapes.

September Average Humidity in Clarion

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

In Clarion 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 Clarion.

Maximum UV Index Levels in Clarion for September

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

Data source: Clarion 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 Clarion Compares to Other Months

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

This table compares monthly weather conditions in Clarion, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	33 mm (1.3 inches)	82%	moderate
February Weather	-7°C (19°F)	46 mm (1.8 inches)	84%	moderate
March Weather	2°C (36°F)	73 mm (2.9 inches)	80%	moderate
April Weather	8°C (47°F)	78 mm (3.1 inches)	81%	very high
May Weather	16°C (61°F)	171 mm (6.7 inches)	74%	very high
June Weather	23°C (73°F)	111 mm (4.4 inches)	80%	extreme
July Weather	24°C (75°F)	87 mm (3.4 inches)	80%	very high
August Weather	22°C (72°F)	105 mm (4.1 inches)	77%	very high
September Weather	19°C (67°F)	122 mm (4.8 inches)	75%	very high
October Weather	10°C (50°F)	116 mm (4.6 inches)	80%	high
November Weather	2°C (36°F)	46 mm (1.8 inches)	87%	moderate
December Weather	-2°C (28°F)	37 mm (1.5 inches)	83%	moderate