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October Weather in Philadelphia, United States

Last updated: June 24, 2025

In Philadelphia, United States during October, the average temperature hovers around 20°C (68°F). Expect a minimum of 1°C (34°F) and a maximum soaring to 37°C (99°F). This month witnesses 106 mm (4.2 in) of precipitation spread over 8 days, contributing to a relatively high average humidity of 73%.

October Temperature in Philadelphia

In October, in Philadelphia, the average temperature is 20°C (68°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as 1°C (34°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

October Weather in Philadelphia: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Philadelphia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Philadelphia, October typically has an average temperature of 20°C (68°F), with highs reaching up to 37°C (99°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec485360647378818077685451
Data source: Temperature data for Philadelphia 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.

October Precipitation in Philadelphia

In Philadelphia in October, the precipitation amount is 106 mm (4.2 in) over a span of 8 days.

October Precipitation Trends in Philadelphia

The chart displays monthly precipitation patterns in Philadelphia, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Philadelphia, October typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101731221581291681071309310668121
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Philadelphia

In Philadelphia in October, humidity is 73%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky, yet the atmosphere remains pleasant for leisurely strolls and sightseeing.

October Average Humidity in Philadelphia

This chart illustrates the average monthly humidity levels in Philadelphia, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Philadelphia is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Philadelphia

In Philadelphia in October, 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 Philadelphia.

Maximum UV Index Levels in Philadelphia for October

The chart shows the monthly maximum UV Index (UVI) for Philadelphia in October, 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 October, the maximum UV index in Philadelphia typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Philadelphia October 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 October Weather in Philadelphia Compares to Other Months

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

This table compares monthly weather conditions in Philadelphia, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)110 mm (4.3 inches)85%moderate
February Weather11°C (53°F)173 mm (6.8 inches)84%high
March Weather15°C (60°F)121 mm (4.8 inches)82%very high
April Weather18°C (64°F)158 mm (6.2 inches)82%very high
May Weather23°C (73°F)129 mm (5.1 inches)82%extreme
June Weather26°C (79°F)168 mm (6.6 inches)79%extreme
July Weather27°C (81°F)107 mm (4.2 inches)82%extreme
August Weather27°C (80°F)130 mm (5.1 inches)77%extreme
September Weather25°C (77°F)93 mm (3.7 inches)74%very high
October Weather20°C (68°F)106 mm (4.2 inches)73%very high
November Weather12°C (54°F)68 mm (2.7 inches)85%high
December Weather10°C (51°F)121 mm (4.8 inches)88%moderate

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