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September Weather in Westmoreland, United States

Last updated: June 24, 2025

In September, the average temperature in Westmoreland, United States hovers around 22°C (72°F), but prepare for some variability: temperatures can dip as low as 5°C (42°F) or soar to a sizzling 37°C (99°F). Expect some rainfall too, with an average precipitation of 71 mm (2.8 in) over the course of 7 days. This period also tends to be quite humid, boasting an average humidity of 71%.

September Temperature in Westmoreland

In September in Westmoreland, the average temperature is 22°C (72°F). Maximums can reach 37°C (99°F) and minimums can drop as low as 5°C (42°F). This means that travelers should be prepared for a wide range of temperatures, ensuring they pack both lighter clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Westmoreland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westmoreland, September typically has an average temperature of 22°C (72°F), with highs reaching up to 37°C (99°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec303145536577807672554336
Data source: Temperature data for Westmoreland 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 Westmoreland

In Westmoreland in September, the precipitation amount is 71 mm (2.8 in) over a span of 7 days.

September Precipitation Trends in Westmoreland

The chart displays monthly precipitation patterns in Westmoreland, 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 Westmoreland, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec323095732069891107711123427
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Westmoreland

In Westmoreland in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Westmoreland

This chart illustrates the average monthly humidity levels in Westmoreland, 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 Westmoreland is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Westmoreland

In Westmoreland 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 Westmoreland.

Maximum UV Index Levels in Westmoreland for September

The chart shows the monthly maximum UV Index (UVI) for Westmoreland 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 Westmoreland typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Westmoreland 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 Westmoreland Compares to Other Months

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

This table compares monthly weather conditions in Westmoreland, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)31 mm (1.2 inches)76%moderate
February Weather-1°C (31°F)30 mm (1.2 inches)77%moderate
March Weather7°C (45°F)95 mm (3.7 inches)70%high
April Weather12°C (54°F)72 mm (2.9 inches)73%very high
May Weather18°C (65°F)206 mm (8.1 inches)82%very high
June Weather25°C (77°F)97 mm (3.8 inches)82%extreme
July Weather27°C (80°F)91 mm (3.6 inches)81%extreme
August Weather25°C (77°F)107 mm (4.2 inches)78%very high
September Weather22°C (72°F)71 mm (2.8 inches)71%very high
October Weather13°C (56°F)112 mm (4.4 inches)71%high
November Weather6°C (43°F)34 mm (1.4 inches)81%moderate
December Weather2°C (36°F)27 mm (1.1 inches)84%moderate

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