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September Weather in West Union, United States

Last updated: June 24, 2025

In September, the average temperature in West Union, United States hovers around 20°C (69°F). While the mercury can dip as low as 5°C (40°F), it can also soar up to 35°C (95°F). Expect 112 mm (4.4 in) of precipitation spread over about 9 days, with an average humidity of 73%. Be prepared for a mix of weather as you explore!

September Temperature in West Union

In September in West Union, the average temperature is 20°C (69°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop to as low as 5°C (40°F). This weather makes West Union a great destination for travelers seeking a range of pleasant temperatures and outdoor activities.

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 20°C (69°F), with highs reaching up to 35°C (95°F) and lows dropping to around 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec343945546471757369594439
Data source: Temperature data for West Union generated using information from the Copernicus Climate Change Service.
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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 total precipitation amount is 112 mm (4.4 in), occurring over a span 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 112 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9714111714615717613611711211487125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in West Union

In West Union in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

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%88%87%82%84%82%73%74%81%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
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 (34°F)97 mm (3.8 inches)88%moderate
February Weather4°C (39°F)141 mm (5.6 inches)88%moderate
March Weather7°C (45°F)117 mm (4.6 inches)88%high
April Weather12°C (54°F)146 mm (5.8 inches)86%very high
May Weather18°C (64°F)157 mm (6.2 inches)82%very high
June Weather22°C (71°F)176 mm (6.9 inches)84%very high
July Weather24°C (75°F)136 mm (5.3 inches)82%very high
August Weather23°C (73°F)117 mm (4.6 inches)73%very high
September Weather20°C (69°F)112 mm (4.4 inches)73%very high
October Weather15°C (59°F)114 mm (4.5 inches)81%high
November Weather7°C (44°F)87 mm (3.4 inches)89%moderate
December Weather4°C (39°F)125 mm (4.9 inches)86%moderate

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