Climate averages 1991–2020
Philadelphia weather
in October.
A mild, wet month: the 6th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Philadelphia: daytime highs average 18.6°C and nights cool to about 10.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 91 mm of rain on roughly 8 days, which makes October a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 11 min on an average October day.
The nearest other city in this atlas is Camden (5 km away). In October its highs average 18.6°C, about as warm as Philadelphia, with 90 mm of rain.
Among the 498 cities listed in the United States, Philadelphia ranks joint 306th of 498 for the warmest October highs and joint 346th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Philadelphia is 2.8°C cooler than that mean.
From October to November, average highs fall by 6.2°C to 12.4°C, and monthly rainfall falls from 91 mm to 74 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Philadelphia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.5°C-3.3°C | -3.3°C | 82 | 9.3 | 9.710 h |
| February | 6.2°C-2.8°C | -2.8°C | 76 | 9.0 | 10.711 h |
| March | 10.7°C1.0°C | 1.0°C | 104 | 10.5 | 11.912 h |
| April | 17.2°C6.7°C | 6.7°C | 92 | 10.2 | 13.213 h |
| May | 22.4°C12.3°C | 12.3°C | 90 | 11.1 | 14.414 h |
| June | 27.3°C17.6°C | 17.6°C | 97 | 10.6 | 15.015 h |
| July | 29.9°C20.7°C | 20.7°C | 98 | 10.7 | 14.715 h |
| August | 28.8°C19.9°C | 19.9°C | 95 | 10.2 | 13.714 h |
| September | 25.1°C16.3°C | 16.3°C | 104 | 9.2 | 12.512 h |
| October, selected | 18.6°C10.0°C | 10.0°C | 91 | 8.1 | 11.211 h |
| November | 12.4°C4.2°C | 4.2°C | 74 | 7.8 | 10.010 h |
| December | 7.0°C-0.4°C | -0.4°C | 100 | 9.3 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Camden in OctoberUnited States · 5 kmHigh 18.6°C · Low 10.0°C · 90 mm rain
- Cherry Hill in OctoberUnited States · 11 kmHigh 18.5°C · Low 10.3°C · 90 mm rain
- Wilmington (Delaware), United States in OctoberUnited States · 40 kmHigh 18.2°C · Low 10.0°C · 91 mm rain
- Trenton in OctoberUnited States · 46 kmHigh 18.2°C · Low 9.5°C · 92 mm rain
- Bethlehem, United States in OctoberUnited States · 77 kmHigh 17.1°C · Low 7.8°C · 105 mm rain
- Reading, United States in OctoberUnited States · 78 kmHigh 17.7°C · Low 8.9°C · 95 mm rain
- Allentown in OctoberUnited States · 78 kmHigh 17.2°C · Low 7.8°C · 100 mm rain
- Toms River in OctoberUnited States · 82 kmHigh 18.3°C · Low 11.2°C · 95 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Philadelphia) is explained once on the Philadelphia year overview and on the Sources, method and limits page.