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Hourly Forecast
Daylight Hours
06:47
Sunrise
19:02
Sunset
Moon
Waxing Crescent
11:34
Moonrise
20:37
Moonset
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Weather in Philadelphia today, September 15, 2026
Conditions in Philadelphia on September 15, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting.
The day peaks near 24°C and cools toward 12°C. The air stays humid, with relative humidity between 41% and 72% and the peak around 23:00. Expect gentle winds, highest near 21:00 at 4.2 km/h.
Through the afternoon skies look more workable, with cloud near 14% around 15:00. Later outdoor plans have a clearer window than the morning may have suggested. Horizontal visibility holds close to 16.1 km. Sunrise is at 06:47 and sunset at 19:02, giving 12 hours 14 minutes of sunlight today.
The practical takeaway for Philadelphia is a bright September 15, 2026, ideal for outdoor errands before temperatures ease from about 24°C.
Frequently asked questions about weather in Philadelphia
How warm does it get in Philadelphia?
The warmest month in Philadelphia is July, with average high temperatures of 31°C. The average temperature during this period is around 26°C.
How cold does it get in Philadelphia?
The coldest month in Philadelphia is January, with average low temperatures of -1°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Philadelphia?
The wettest month in Philadelphia is July, with an average of 128mm of precipitation.
What is the driest time of year in Philadelphia?
The driest month in Philadelphia is November, with an average of 74mm of precipitation.
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