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October Weather in Philadelphia, United States

Last updated: June 24, 2025

In October, the average temperature in Philadelphia, United States is a pleasant 18°C (65°F). However, be prepared for a range, as temperatures can drop to a brisk 0°C (32°F) or soar to a hot 35°C (96°F). Additionally, expect about 118 mm (4.6 in) of precipitation spread over 10 days, coupled with an average humidity level of 80%.

October Temperature in Philadelphia

In October in Philadelphia, the average temperature is 18°C (65°F). Maximums can reach 35°C (96°F), while minimums can drop as low as 0°C (32°F). This variation in temperature makes it essential for travelers to pack layers to stay comfortable throughout the day.

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 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec424753607076807874645046
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 total precipitation amount is 118 mm (4.6 in) over a span of 10 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 118 mm (4.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1001761601411131071111199211879137
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 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
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 Weather6°C (42°F)99 mm (3.9 inches)86%moderate
February Weather8°C (47°F)176 mm (6.9 inches)86%high
March Weather12°C (53°F)160 mm (6.3 inches)86%very high
April Weather15°C (60°F)141 mm (5.5 inches)82%very high
May Weather21°C (70°F)113 mm (4.4 inches)85%extreme
June Weather24°C (76°F)107 mm (4.2 inches)85%extreme
July Weather26°C (80°F)111 mm (4.4 inches)83%extreme
August Weather26°C (78°F)119 mm (4.7 inches)76%very high
September Weather24°C (75°F)92 mm (3.6 inches)76%very high
October Weather18°C (65°F)118 mm (4.6 inches)80%high
November Weather10°C (50°F)79 mm (3.1 inches)88%moderate
December Weather8°C (46°F)137 mm (5.4 inches)88%moderate

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