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September Weather in Carlisle, United States

Last updated: June 24, 2025

In Carlisle, United States, the average temperature in September hovers around 20°C (69°F). While you can expect a minimum of 4°C (40°F), temperatures can soar to a maximum of 34°C (93°F). Be prepared for 125 mm (4.9 in) of precipitation over about 10 days, contributing to an average humidity of 66%. Enjoy the diverse weather this month brings!

September Temperature in Carlisle

In September in Carlisle, the average temperature is a pleasant 20°C (69°F). Maximum temperatures can reach as high as 34°C (93°F), while the minimum can dip down to 4°C (40°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm and cool conditions.

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

The chart illustrates September temperature patterns in Carlisle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carlisle, 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 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec333642526372777568584337
Data source: Temperature data for Carlisle 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 Carlisle

In Carlisle in September, the precipitation amount is 125 mm (4.9 in) spread over a period of 10 days.

September Precipitation Trends in Carlisle

The chart displays monthly precipitation patterns in Carlisle, 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 Carlisle, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6310095101124991391131251108489
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Carlisle

In Carlisle 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 Carlisle

This chart illustrates the average monthly humidity levels in Carlisle, 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 Carlisle 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 Carlisle

In Carlisle 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 Carlisle.

Maximum UV Index Levels in Carlisle for September

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

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

This table compares monthly weather conditions in Carlisle, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)63 mm (2.5 inches)87%moderate
February Weather2°C (36°F)99 mm (3.9 inches)85%moderate
March Weather6°C (42°F)95 mm (3.7 inches)85%high
April Weather11°C (53°F)101 mm (4.0 inches)83%very high
May Weather17°C (63°F)124 mm (4.9 inches)75%very high
June Weather22°C (72°F)99 mm (3.9 inches)73%very high
July Weather25°C (77°F)139 mm (5.5 inches)65%very high
August Weather24°C (75°F)113 mm (4.4 inches)62%very high
September Weather20°C (69°F)125 mm (4.9 inches)66%very high
October Weather15°C (59°F)110 mm (4.3 inches)79%high
November Weather6°C (44°F)84 mm (3.3 inches)87%moderate
December Weather3°C (37°F)89 mm (3.5 inches)85%low

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