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September Weather in Pittsburg, United States

Last updated: June 24, 2025

In September, the average temperature in Pittsburg, United States hovers around 23°C (74°F), with a comfortable humidity level of 75%. Expect temperatures to range from a cool 8°C (47°F) to a warm 35°C (96°F). Be prepared for a bit of rain, as there’s typically about 75 mm (3.0 in) of precipitation spread over 7 days.

September Temperature in Pittsburg

In September in Pittsburg, the average temperature is 23°C (74°F). The maximum can reach 35°C (96°F), and the minimum can drop as low as 8°C (47°F). This variety in temperatures makes Pittsburg a suitable destination for travelers seeking both warm days and cooler evenings.

September Weather in Pittsburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Pittsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pittsburg, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614642
Data source: Temperature data for Pittsburg 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 Pittsburg

In Pittsburg in September, the precipitation amount is 75 mm (3.0 in) over a span of 7 days.

September Precipitation Trends in Pittsburg

The chart displays monthly precipitation patterns in Pittsburg, 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 Pittsburg, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec961151401381311179084751139287
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Pittsburg

In Pittsburg in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Pittsburg

This chart illustrates the average monthly humidity levels in Pittsburg, 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 Pittsburg is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Pittsburg

In Pittsburg in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Pittsburg.

Maximum UV Index Levels in Pittsburg for September

The chart shows the monthly maximum UV Index (UVI) for Pittsburg 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 Pittsburg typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
Data source: Pittsburg 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 Pittsburg Compares to Other Months

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

This table compares monthly weather conditions in Pittsburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)96 mm (3.8 inches)86%moderate
February Weather4°C (39°F)115 mm (4.5 inches)84%high
March Weather10°C (49°F)140 mm (5.5 inches)84%high
April Weather14°C (57°F)138 mm (5.4 inches)80%very high
May Weather20°C (69°F)131 mm (5.2 inches)82%extreme
June Weather25°C (77°F)117 mm (4.6 inches)83%extreme
July Weather27°C (81°F)90 mm (3.5 inches)79%very high
August Weather25°C (78°F)84 mm (3.3 inches)76%very high
September Weather23°C (74°F)75 mm (3.0 inches)75%very high
October Weather16°C (61°F)113 mm (4.4 inches)74%high
November Weather8°C (46°F)92 mm (3.6 inches)85%moderate
December Weather5°C (42°F)87 mm (3.4 inches)88%moderate

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