September Weather in Marion, United States

Last updated: June 24, 2025

In September, the average temperature in Marion, United States is a pleasant 24°C (76°F). Expect a range from a cool 10°C (50°F) at night to a warm 35°C (96°F) during the day. Be prepared for some rain, as 79 mm (3.1 in) of precipitation is expected over about 8 days. With an average humidity of 71%, it's a great time to enjoy the local scenery while staying hydrated!

September Temperature in Marion

In September in Marion, the average temperature is 24°C (76°F). The maximum can reach 35°C (96°F) and the minimum can be as low as 10°C (50°F). This makes it a perfect time for travelers to enjoy a variety of outdoor activities while experiencing mild and warm weather.

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

The chart illustrates September temperature patterns in Marion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marion, September typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Marion

In Marion in September, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

September Precipitation Trends in Marion

The chart displays monthly precipitation patterns in Marion, 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 Marion, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 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 Marion

In Marion in September humidity is 71%. With an average temperature of 24°C (76°F), this humidity feels like a warm, tropical embrace, making it essential to stay hydrated while exploring, as the air is thick and can leave you feeling sticky and slightly tired after even short excursions.

September Average Humidity in Marion

This chart illustrates the average monthly humidity levels in Marion, 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 Marion is approximately 71%, 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 Marion

In Marion in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Marion.

Maximum UV Index Levels in Marion for September

The chart shows the monthly maximum UV Index (UVI) for Marion 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 Marion typically reaches 9, which falls under the very high exposure category.

Data source: Marion 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 Marion Compares to Other Months

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

This table compares monthly weather conditions in Marion, 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 (42°F)	105 mm (4.1 inches)	84%	moderate
February Weather	7°C (46°F)	165 mm (6.5 inches)	83%	high
March Weather	13°C (55°F)	160 mm (6.3 inches)	81%	very high
April Weather	16°C (61°F)	133 mm (5.2 inches)	81%	very high
May Weather	22°C (72°F)	124 mm (4.9 inches)	83%	extreme
June Weather	26°C (79°F)	116 mm (4.6 inches)	83%	extreme
July Weather	28°C (82°F)	125 mm (4.9 inches)	81%	extreme
August Weather	26°C (80°F)	114 mm (4.5 inches)	74%	very high
September Weather	24°C (76°F)	79 mm (3.1 inches)	71%	very high
October Weather	18°C (65°F)	115 mm (4.5 inches)	76%	high
November Weather	10°C (51°F)	80 mm (3.1 inches)	84%	moderate
December Weather	8°C (47°F)	148 mm (5.8 inches)	88%	moderate