Normal weather for Philadelphia in September
It's hot in September in Philadelphia with an average temperature of 30°C. Temperatures this month range from a low of 27°C to a high of 31°C. At night, you can expect temperatures between 8°C and 14°C.
According to weather history, there is only 0,3 mm of precipitation in September. The wind speed is around 4 Bft, mostly coming from the South.
Philadelphia in September |
New York | ||
|---|---|---|---|
 Average Temperature |
30°C | 27°C | |
 High Temp |
31°C | 31°C | |
| Low Temp |
27°C | 21°C | |
 Total Precipitation |
0,3 mm | 57 mm | |
| Rainy Days |
1 day | 9 days | |
Start of September
The month of September starts in Philadelphia with hot temps, averaging around 29°C during the day and nights around 10°C. No precipitation expected at the start of the month; it’ll be sunny.
With the temperature difference between day and night, it’s smart to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid September
By mid-September, daytime temps rise to around 30°C, with nights around 12°C. No precipitation expected during this period, so you can enjoy plenty of sunshine.
Since it cools down at night, it’s a good idea to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
End of September
By the end of September, the average daytime temperature in Philadelphia is around 31°C, while nighttime temps are about 13°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
Because temperatures drop in the evening, wearing layers is recommended. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Philadelphia?
September is an awesome month to be in Philadelphia for sunny weather. You’ll have high temperatures and not much chance of rain this month.
Temperature records for Philadelphia in September
Check out the climate of Philadelphia for all months and discover the best travel time
August
Daily Temperature in September in Philadelphia
This chart shows the average daily high and low temperatures in September for Philadelphia, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Philadelphia
The chart below shows the average daily precipitation in September for Philadelphia, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 1 day of precipitation in Philadelphia.
Daily UV Index in September in Philadelphia
This chart shows the average daily UV index in September in Philadelphia, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Philadelphia Over the Years
This chart shows the average temperature in September in Philadelphia, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Philadelphia Over the Years
This chart shows the average precipitation in September in Philadelphia, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Philadelphia
Click on any day in September to get detailed info about the usual weather on that day in Philadelphia. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Philadelphia
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Average Weather in Philadelphia by Month
Click on a month below to see detailed weather info for Philadelphia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Philadelphia for all months at once
