nomadseason

September Weather in West Union, United States

Last updated: June 24, 2025

In September, the average temperature in West Union, United States hovers around 21°C (70°F). Expect a range from a cool 7°C (44°F) to a scorching 36°C (96°F). Along with this warmth, be prepared for 110 mm (4.3 in) of precipitation spread over 9 days, contributing to an average humidity of 73%.

September Temperature in West Union

In September in West Union, the average temperature is 21°C (70°F), with maximums reaching 36°C (96°F) and minimums dropping to as low as 7°C (44°F). This range makes it ideal for travelers looking to enjoy a variety of outdoor activities while also being prepared for cooler evenings.

September Weather in West Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in West Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Union, September typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (96°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec343946556673777570594439
Data source: Temperature data for West Union 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 West Union

In West Union in September, the precipitation amount is 110 mm (4.3 in) over the course of 9 days.

September Precipitation Trends in West Union

The chart displays monthly precipitation patterns in West Union, 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 West Union, September typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec901271171361311621169611011385117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in West Union

In West Union in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in West Union

This chart illustrates the average monthly humidity levels in West Union, 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 West Union is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in West Union

In West Union 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 West Union.

Maximum UV Index Levels in West Union for September

The chart shows the monthly maximum UV Index (UVI) for West Union 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 West Union typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098653
Data source: West Union 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 West Union Compares to Other Months

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

This table compares monthly weather conditions in West Union, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)90 mm (3.6 inches)88%moderate
February Weather4°C (39°F)126 mm (5.0 inches)88%moderate
March Weather8°C (46°F)117 mm (4.6 inches)87%high
April Weather13°C (55°F)136 mm (5.4 inches)85%very high
May Weather19°C (66°F)130 mm (5.1 inches)81%very high
June Weather23°C (73°F)162 mm (6.4 inches)82%very high
July Weather25°C (77°F)115 mm (4.5 inches)81%very high
August Weather24°C (75°F)96 mm (3.8 inches)73%very high
September Weather21°C (70°F)110 mm (4.3 inches)73%very high
October Weather15°C (60°F)113 mm (4.5 inches)78%high
November Weather7°C (45°F)85 mm (3.3 inches)89%moderate
December Weather4°C (40°F)117 mm (4.6 inches)87%moderate

Compare West Union's Climate with Cities Worldwide