September Weather in Clark, United States

Last updated: June 24, 2025

The average temperature in Clark, United States during September is a pleasant 17°C (63°F). Expect the mercury to dip as low as 2°C (37°F) and rise to a warm 34°C (93°F). With 84 mm (3.3 in) of precipitation spread over 8 days, a light drizzle is likely but should not overshadow the beauty of the season. The average humidity lingers around 77%, making for a comfortable atmosphere.

September Temperature in Clark

In September in Clark, the average temperature is 17°C (63°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 2°C (37°F). This makes it a diverse climate that caters to both warm and cool weather preferences, making it an ideal time for travelers to enjoy various outdoor activities.

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

The chart illustrates September temperature patterns in Clark, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clark, September typically has an average temperature of 17°C (63°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (37°F).

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

September Precipitation in Clark

In Clark in September, the precipitation amount is 84 mm (3.3 in) spread over 8 days.

September Precipitation Trends in Clark

The chart displays monthly precipitation patterns in Clark, 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 Clark, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 8 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 Clark

In Clark in September, humidity is 77%. With an average temperature of 17°C (63°F), this humidity feels like a cozy blanket wrapped around you, creating a muggy atmosphere that can be a bit uncomfortable for traveling, making you want to seek shade and hydration as you explore.

September Average Humidity in Clark

This chart illustrates the average monthly humidity levels in Clark, 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 Clark is approximately 77%, 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 Clark

In Clark 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 Clark.

Maximum UV Index Levels in Clark for September

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

Data source: Clark 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 Clark Compares to Other Months

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

This table compares monthly weather conditions in Clark, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (15°F)	19 mm (0.8 inches)	81%	moderate
February Weather	-10°C (14°F)	15 mm (0.6 inches)	85%	moderate
March Weather	-1°C (31°F)	43 mm (1.7 inches)	76%	high
April Weather	5°C (41°F)	60 mm (2.3 inches)	79%	high
May Weather	14°C (57°F)	73 mm (2.9 inches)	76%	very high
June Weather	21°C (71°F)	77 mm (3.0 inches)	81%	very high
July Weather	23°C (74°F)	81 mm (3.2 inches)	82%	very high
August Weather	21°C (71°F)	93 mm (3.7 inches)	82%	very high
September Weather	17°C (63°F)	84 mm (3.3 inches)	77%	very high
October Weather	8°C (46°F)	79 mm (3.1 inches)	76%	moderate
November Weather	0°C (33°F)	20 mm (0.8 inches)	84%	moderate
December Weather	-5°C (23°F)	31 mm (1.2 inches)	81%	low