nomadseason

September Weather in Vandalia, United States

Last updated: June 24, 2025

In September, the average temperature in Vandalia, United States hovers around 22°C (72°F), offering a pleasant climate for outdoor activities. Expect a minimum of 6°C (43°F) and a maximum of 35°C (95°F), allowing for a wide range of experiences. Precipitation is moderate, with an expected 62 mm (2.5 in) falling over approximately 7 days, complemented by an average humidity level of 76%. Embrace the diverse weather and enjoy all that this charming destination has to offer!

September Temperature in Vandalia

In September in Vandalia, the average temperature is 22°C (72°F). Maximums can reach 35°C (95°F), while minimums can dip as low as 6°C (43°F). This diverse range of temperatures makes Vandalia a great destination for travelers seeking both warmth and cooler respite.

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

The chart illustrates September temperature patterns in Vandalia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vandalia, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec313346546676797672574338
Data source: Temperature data for Vandalia 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 Vandalia

In Vandalia in September, the precipitation amount is 62 mm (2.5 in) over a period of 7 days.

September Precipitation Trends in Vandalia

The chart displays monthly precipitation patterns in Vandalia, 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 Vandalia, September typically receives around 62 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec666212511616510995124621006045
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Vandalia

In Vandalia in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Vandalia

This chart illustrates the average monthly humidity levels in Vandalia, 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 Vandalia is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Vandalia

In Vandalia 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 Vandalia.

Maximum UV Index Levels in Vandalia for September

The chart shows the monthly maximum UV Index (UVI) for Vandalia 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 Vandalia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Vandalia 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 Vandalia Compares to Other Months

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

This table compares monthly weather conditions in Vandalia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)66 mm (2.6 inches)82%moderate
February Weather1°C (34°F)62 mm (2.4 inches)80%moderate
March Weather8°C (46°F)125 mm (4.9 inches)80%high
April Weather12°C (54°F)116 mm (4.5 inches)80%very high
May Weather19°C (67°F)165 mm (6.5 inches)82%very high
June Weather25°C (76°F)109 mm (4.3 inches)83%extreme
July Weather26°C (79°F)95 mm (3.7 inches)81%extreme
August Weather24°C (76°F)124 mm (4.9 inches)80%very high
September Weather22°C (72°F)62 mm (2.5 inches)76%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather6°C (44°F)60 mm (2.4 inches)85%moderate
December Weather3°C (38°F)45 mm (1.8 inches)86%moderate

Compare Vandalia's Climate with Cities Worldwide