Weather in Philadelphia in September
In an average September, Philadelphia sees a daily high around 78°F and a low around 62°F, based on 1980–2026 of local climate records.
| Average high | 78°F |
|---|---|
| Typical high range | 70°F to 86°F |
| Average low | 62°F |
| Typical low range | 52°F to 71°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
97°F
1983-09-11
Lowest
53°F
1984-09-28
Low
Highest
80°F
2016-09-09
Lowest
40°F
1989-09-28
Feels-like
Highest
124°F
2018-09-06
Lowest
34°F
1989-09-28
Humidity
Highest
22.5 g/m³
2018-09-06
Lowest
4.7 g/m³
2020-09-19
Wind
Highest
27 mph
1985-09-27
Lowest
3 mph
1992-09-13
Gust
Highest
58 mph
1999-09-16
Lowest
8 mph
2001-09-18
Precip
Wettest
10.56 in
1999
Driest
0.95 in
2007
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