Philadelphia in september: average Weather, Temperature and Climate
Weather in Philadelphia in september 2025
The weather in Philadelphia in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
67°F
Clear/Sunny
44% of time
22%
13%
12%
Weather at 12pm
79°F
Clear/Sunny
45% of time
28%
16%
10%
Weather at 6pm
72°F
Clear/Sunny
47% of time
23%
12%
10%
Weather at 3am
67°F
37%
19%
18%
16%
Evolution of daily average temperature and precipitation in Philadelphia in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Philadelphia in september.
The climate of Philadelphia in september is good
The weather in september in Philadelphia is relatively dry (with 3in of rainfall over 4 days). This is better than the previous month since in august it receives an average of 4.6in of rainfall over 8 days.
The climate quite comfortable in this location september. The high seasonal norm is 81°F. In the morning the temperature drops to 67°F. Thus, the mean temperature average on this month of september in Philadelphia is 74°F. Note that seasonal normals in contrast with those observed in Philadelphia in the month of september with a maximum record of 99°F in 2018 and a minimum record of 49°F in 2011. You You can hope to have about 6 days with temperatures up to 86°F, or 20 of time.
Day length in Philadelphia in september is 12:27. Sunrise is at 05:42 and sunset is at 18:09.
With a good climate, september is advisable to go in this city in United States.
Seasonal average climate and temperature of Philadelphia in september
Check below seasonal norms These datas are compiled from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 74°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 67°F | ||||
| Highest record temperature | 99°F (2018) | ||||
| Lowest record temperature | 49°F (2011) | ||||
| Number of days at +86°F | 6 day(s) (20%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 72°F | ||||
| Lowest sea temperature | 68°F | ||||
| Highest sea temperature | 76°F | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 67°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3in | ||||
| Number of days with rainfall | 4 day(s) (15%) | ||||
| Record daily rainfall | 2.2in (2010) | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 8.92km | ||||
| Cloud cover | 35% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:42 | ||||
| Time of sunset | 18:09 | ||||
| Length of day | 12:27 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Philadelphia in september 2024:
70°F to 83°F
68°F to 79°F
59°F to 76°F
59°F to 79°F
61°F to 81°F
67°F to 76°F
67°F to 74°F
54°F to 72°F
56°F to 77°F
61°F to 83°F
63°F to 85°F
63°F to 85°F
65°F to 85°F
67°F to 86°F
65°F to 85°F
63°F to 81°F
67°F to 72°F
67°F to 70°F
65°F to 72°F
67°F to 72°F
70°F to 79°F
63°F to 72°F
63°F to 72°F
63°F to 68°F
67°F to 68°F
72°F to 79°F
70°F to 76°F
68°F to 70°F
65°F to 67°F
63°F to 68°F
Map: other cities in the United States (USA) in september
Cities near Philadelphia:
| New Jersey in september | perfect weather |
| Atlantic City in september | perfect weather |
| Wildwood in september | good weather |
| New York City in september | good weather |
| Brooklyn in september | good weather |
| Baltimore in september | good weather |
| Maryland in september | good weather |
| Ocean City (Maryland) in september | good weather |
| Washington D. C. in september | good weather |
| Connecticut in september | good weather |
| Albany in september | good weather |
| Virginia Beach in september | good weather |
Click over cities on the map for information about the weather in september.
Philadelphia
perfect weather
good
tolerable
bad
very bad
Weather data for Philadelphia in september:
Weather data for Philadelphia for september are derived from an average of the weather forecast since 2009 in Philadelphia. There is a margin of error and these forecasts are to be considered as general information only. The weather in Philadelphia can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Philadelphia.