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September Weather in Liverpool, United States

Last updated: June 24, 2025

In September, the average temperature in Liverpool, United States is a comfortable 20°C (69°F), ideal for exploring the area. Temperatures can vary, with a minimum of 5°C (41°F) and a maximum of 34°C (93°F). Expect some rain, as precipitation averages 122 mm (4.8 in) over 10 days. With an average humidity of 66%, it's a pleasant time to experience the local scenery.

September Temperature in Liverpool

In September in Liverpool, the average temperature is 20°C (69°F). Maximums can reach 34°C (93°F), and minimums can be as low as 5°C (41°F). This makes it a great time to visit, as you can enjoy warm days while still experiencing cooler evenings.

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

The chart illustrates September temperature patterns in Liverpool, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Liverpool, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec323542526372777568584337
Data source: Temperature data for Liverpool 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 Liverpool

In Liverpool in September, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 days.

September Precipitation Trends in Liverpool

The chart displays monthly precipitation patterns in Liverpool, 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 Liverpool, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6810092104120901221021221138988
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Liverpool

In Liverpool in September humidity is 66%. With an average temperature of 20°C (69°F), this humidity feels like a gentle enveloping warmth, making it comfortable for traveling but with a slight stickiness that may encourage you to seek shade or refreshments frequently.

September Average Humidity in Liverpool

This chart illustrates the average monthly humidity levels in Liverpool, 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 Liverpool is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Liverpool

In Liverpool 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 Liverpool.

Maximum UV Index Levels in Liverpool for September

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

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

This table compares monthly weather conditions in Liverpool, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)68 mm (2.7 inches)87%moderate
February Weather2°C (35°F)100 mm (3.9 inches)85%moderate
March Weather5°C (42°F)92 mm (3.6 inches)85%high
April Weather11°C (52°F)104 mm (4.1 inches)83%very high
May Weather17°C (63°F)120 mm (4.7 inches)75%very high
June Weather22°C (72°F)90 mm (3.5 inches)73%very high
July Weather25°C (77°F)122 mm (4.8 inches)65%very high
August Weather24°C (75°F)102 mm (4.0 inches)62%very high
September Weather20°C (69°F)122 mm (4.8 inches)66%very high
October Weather15°C (59°F)113 mm (4.4 inches)79%high
November Weather6°C (44°F)89 mm (3.5 inches)87%moderate
December Weather3°C (37°F)88 mm (3.5 inches)85%low

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