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September Weather in Doylestown, United States

Last updated: June 24, 2025

In September, the average temperature in Doylestown, United States is a comfortable 20°C (68°F), but be prepared for a temperature range that can dip as low as 4°C (40°F) and rise to a steamy 33°C (91°F). Expect about 96 mm (3.8 in) of rain spread over 10 days, with an average humidity of 77% creating a pleasantly warm atmosphere.

September Temperature in Doylestown

In September in Doylestown, the average temperature is 20°C (68°F). Maximums can reach 33°C (91°F) and minimums can be as low as 4°C (40°F). Be prepared for a range of temperatures to make the most of your travel experience.

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

The chart illustrates September temperature patterns in Doylestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Doylestown, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec293240506270757267574135
Data source: Temperature data for Doylestown 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 Doylestown

In Doylestown in September, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

September Precipitation Trends in Doylestown

The chart displays monthly precipitation patterns in Doylestown, 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 Doylestown, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec839699128121138128100961079390
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Doylestown

In Doylestown in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

September Average Humidity in Doylestown

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

In Doylestown 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 Doylestown.

Maximum UV Index Levels in Doylestown for September

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

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

This table compares monthly weather conditions in Doylestown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)82 mm (3.2 inches)88%moderate
February Weather0°C (33°F)96 mm (3.8 inches)88%moderate
March Weather4°C (40°F)99 mm (3.9 inches)87%high
April Weather10°C (50°F)128 mm (5.0 inches)87%very high
May Weather17°C (62°F)121 mm (4.8 inches)81%very high
June Weather21°C (71°F)138 mm (5.4 inches)83%very high
July Weather24°C (75°F)128 mm (5.0 inches)82%very high
August Weather22°C (72°F)99 mm (3.9 inches)76%very high
September Weather20°C (68°F)96 mm (3.8 inches)77%very high
October Weather14°C (57°F)107 mm (4.2 inches)82%high
November Weather5°C (41°F)93 mm (3.7 inches)89%moderate
December Weather2°C (35°F)90 mm (3.5 inches)86%low

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