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September Weather in Center City, United States

Last updated: June 24, 2025

In September, the average temperature in Center City, United States hovers around 17°C (63°F). During this time, temperatures can dip as low as 1°C (34°F) or soar up to 32°C (90°F). Expect 102 mm (4.0 in) of precipitation spread over approximately 10 days, while the air carries an average humidity of 81%.

September Temperature in Center City

In September in Center City, the average temperature is 17°C (63°F). Maximums can reach 32°C (90°F), while minimums can drop as low as 1°C (34°F). Be prepared for a range of temperatures during your travels.

September Weather in Center City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Center City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Center City, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec151632425870737063473222
Data source: Temperature data for Center City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Center City

In Center City in September, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

September Precipitation Trends in Center City

The chart displays monthly precipitation patterns in Center City, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Center City, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec22335089117891011271021023954
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Center City

In Center City in September humidity is 81%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making travel slightly oppressive and calling for frequent breaks in air-conditioned spaces to recharge and enjoy your journey comfortably.

September Average Humidity in Center City

This chart illustrates the average monthly humidity levels in Center City, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Center City is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Center City

In Center City in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Center City.

Maximum UV Index Levels in Center City for September

The chart shows the monthly maximum UV Index (UVI) for Center City in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Center City typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Center City September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Center City Compares to Other Months

Weather in Center City varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Center City, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Center City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)22 mm (0.9 inches)87%low
February Weather-9°C (16°F)33 mm (1.3 inches)90%moderate
March Weather0°C (32°F)50 mm (2.0 inches)85%moderate
April Weather6°C (43°F)89 mm (3.5 inches)84%high
May Weather14°C (58°F)117 mm (4.6 inches)78%very high
June Weather21°C (70°F)89 mm (3.5 inches)80%very high
July Weather23°C (73°F)101 mm (4.0 inches)81%very high
August Weather21°C (70°F)126 mm (5.0 inches)81%very high
September Weather17°C (63°F)102 mm (4.0 inches)81%high
October Weather9°C (48°F)102 mm (4.0 inches)84%moderate
November Weather0°C (32°F)39 mm (1.5 inches)88%moderate
December Weather-6°C (22°F)54 mm (2.1 inches)84%low

Compare Center City's Climate with Cities Worldwide