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September Weather in Aliquippa, United States

Last updated: June 24, 2025

In Aliquippa, United States, the average temperature in September hovers around 19°C (67°F), with minimums dipping to 4°C (40°F) and maximums reaching a warm 34°C (93°F). Expect an average precipitation of 117 mm (4.6 in) over about 9 days, complemented by a comfortable average humidity of 77%. Whether you’re planning a cozy retreat or a sunny adventure, be prepared for a range of delightful weather!

September Temperature in Aliquippa

In September in Aliquippa, the average temperature is 19°C (67°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 4°C (40°F). Travelers should prepare for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Aliquippa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aliquippa, September typically has an average temperature of 19°C (67°F), with highs reaching up to 34°C (93°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec303440506270747267564135
Data source: Temperature data for Aliquippa 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 Aliquippa

In Aliquippa in September, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 days.

September Precipitation Trends in Aliquippa

The chart displays monthly precipitation patterns in Aliquippa, 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 Aliquippa, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec95113103133136136135881171249799
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Aliquippa

In Aliquippa in September, humidity is 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

September Average Humidity in Aliquippa

This chart illustrates the average monthly humidity levels in Aliquippa, 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 Aliquippa is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Aliquippa

In Aliquippa 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 Aliquippa.

Maximum UV Index Levels in Aliquippa for September

The chart shows the monthly maximum UV Index (UVI) for Aliquippa 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 Aliquippa typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Aliquippa 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 Aliquippa Compares to Other Months

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

This table compares monthly weather conditions in Aliquippa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)95 mm (3.7 inches)88%moderate
February Weather1°C (34°F)113 mm (4.5 inches)88%moderate
March Weather5°C (41°F)103 mm (4.1 inches)87%high
April Weather10°C (51°F)133 mm (5.2 inches)87%very high
May Weather16°C (62°F)136 mm (5.4 inches)81%very high
June Weather21°C (70°F)136 mm (5.3 inches)83%very high
July Weather24°C (75°F)135 mm (5.3 inches)82%very high
August Weather22°C (73°F)88 mm (3.5 inches)76%very high
September Weather19°C (67°F)117 mm (4.6 inches)77%very high
October Weather14°C (57°F)124 mm (4.9 inches)82%high
November Weather5°C (42°F)97 mm (3.8 inches)89%moderate
December Weather2°C (36°F)99 mm (3.9 inches)86%low

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