nomadseason

September Weather in Marion, United States

Last updated: June 24, 2025

In September, the average temperature in Marion, United States hovers around 17°C (62°F). Expect a range from a chilly 0°C (32°F) to a warm 34°C (93°F). With 90 mm (3.5 in) of precipitation spread over 10 days, you might want to pack an umbrella! The average humidity is around 79%, making for a potentially sticky atmosphere.

September Temperature in Marion

In September in Marion, the average temperature is 17°C (62°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 0°C (32°F). Pack for a range of temperatures to fully enjoy your travel experience in this diverse climate.

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 17°C (62°F), with highs reaching up to 34°C (93°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec222333435666726962493528
Data source: Temperature data for Marion generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Marion

In Marion in September, the precipitation amount is 90 mm (3.5 in) over the course of 10 days.

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 90 mm (3.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec555656971161128396901315866
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Marion

In Marion in September humidity is 79%. With an average temperature of 17°C (62°F), this humidity feels like a warm blanket wrapping around you, making strolling through the streets a bit heavier but still comfortably refreshing for travelers.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)55 mm (2.2 inches)87%low
February Weather-5°C (23°F)56 mm (2.2 inches)87%moderate
March Weather0°C (33°F)56 mm (2.2 inches)86%moderate
April Weather6°C (43°F)97 mm (3.8 inches)87%very high
May Weather14°C (57°F)116 mm (4.5 inches)82%very high
June Weather19°C (67°F)112 mm (4.4 inches)81%very high
July Weather22°C (72°F)83 mm (3.3 inches)78%very high
August Weather21°C (69°F)96 mm (3.8 inches)79%very high
September Weather17°C (62°F)90 mm (3.5 inches)79%high
October Weather10°C (50°F)131 mm (5.2 inches)82%moderate
November Weather2°C (36°F)58 mm (2.3 inches)87%moderate
December Weather-2°C (28°F)66 mm (2.6 inches)86%low

Compare Marion's Climate with Cities Worldwide