Weather in Philadelphia, Pennsylvania, United States in September
In an average September, Philadelphia sees a daily high around 79°F and a low around 58°F, based on 1981–2026 of local climate records.
| Average high | 79°F |
|---|---|
| Typical high range | 71°F to 87°F |
| Average low | 58°F |
| Typical low range | 49°F to 67°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
98°F
2023-09-06
Lowest
51°F
1984-09-28
Low
Highest
75°F
1993-09-03
Lowest
38°F
1991-09-28
Feels-like
Highest
124°F
2016-09-10
Lowest
31°F
1992-09-30
Humidity
Highest
21.4 g/m³
2023-09-08
Lowest
5.6 g/m³
1981-09-29
Wind
Highest
29 mph
2006-09-02
Lowest
4 mph
2007-09-10
Precip
Wettest
9.49 in
1999
Driest
0.74 in
2019
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