September Weather in West Salem, United States

Last updated: June 24, 2025

In September, the average temperature in West Salem, United States hovers around 23°C (73°F), offering a pleasant climate for exploration. However, be prepared for temperature variations, as it can dip to a cool 8°C (47°F) or rise to a warm 34°C (93°F). Rain is fairly common, with 66 mm (2.6 in) of precipitation spread over approximately 7 days, resulting in an average humidity of 79%.

September Temperature in West Salem

In September in West Salem, the average temperature is 23°C (73°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as 8°C (47°F). This makes West Salem an ideal destination for travelers seeking mild to warm weather during this time of year.

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

The chart illustrates September temperature patterns in West Salem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Salem, September typically has an average temperature of 23°C (73°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec343747566877807773604440
Data source: Temperature data for West Salem 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 Salem

In West Salem in September, the precipitation amount is 66 mm (2.6 in) over a period of 7 days.

September Precipitation Trends in West Salem

The chart displays monthly precipitation patterns in West Salem, 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 Salem, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec921091381161321168387661049995
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in West Salem

In West Salem in September humidity is 79%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that clings to the skin, making travel feel both invigorating and slightly exhausting as the air wraps around you like a damp blanket.

September Average Humidity in West Salem

This chart illustrates the average monthly humidity levels in West Salem, 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 Salem is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in West Salem

In West Salem 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 West Salem.

Maximum UV Index Levels in West Salem for September

The chart shows the monthly maximum UV Index (UVI) for West Salem 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 Salem typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111099743
Data source: West Salem 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 Salem Compares to Other Months

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

This table compares monthly weather conditions in West Salem, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)92 mm (3.6 inches)84%moderate
February Weather3°C (37°F)109 mm (4.3 inches)82%moderate
March Weather8°C (48°F)138 mm (5.4 inches)84%high
April Weather13°C (56°F)116 mm (4.6 inches)83%very high
May Weather20°C (68°F)132 mm (5.2 inches)80%very high
June Weather25°C (77°F)116 mm (4.6 inches)83%extreme
July Weather27°C (80°F)83 mm (3.3 inches)82%very high
August Weather25°C (77°F)87 mm (3.4 inches)82%very high
September Weather23°C (73°F)66 mm (2.6 inches)79%very high
October Weather16°C (61°F)104 mm (4.1 inches)79%high
November Weather7°C (45°F)99 mm (3.9 inches)88%moderate
December Weather4°C (40°F)94 mm (3.7 inches)87%moderate

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