nomadseason

September Weather in Pittsburg, United States

Last updated: June 24, 2025

In Pittsburg, United States, the average temperature in September is a pleasant 26°C (79°F). However, be prepared for a range, as temperatures can dip to a cool 10°C (51°F) or soar to a sizzling 38°C (100°F). Expect about 96 mm (3.8 in) of precipitation spread over 8 days, with an average humidity of 65%. Whether you're exploring the sunshine or finding shelter from the occasional rain, make sure you're ready for the diverse weather!

September Temperature in Pittsburg

In September in Pittsburg, the average temperature is 26°C (79°F), with maximums reaching up to 38°C (100°F) and minimums dipping as low as 10°C (51°F). This makes Pittsburg an ideal destination for travelers seeking warm weather but also prepared for 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 26°C (79°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec474959647380838378675651
Data source: Temperature data for Pittsburg generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 96 mm (3.8 in) over the course of 8 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 96 mm (3.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061471321731609779809612070116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Pittsburg

In Pittsburg in September, humidity is 65%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making travel quite sticky and uncomfortable.

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 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
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 Weather8°C (47°F)106 mm (4.2 inches)80%moderate
February Weather10°C (50°F)147 mm (5.8 inches)79%high
March Weather15°C (60°F)131 mm (5.2 inches)78%very high
April Weather18°C (64°F)173 mm (6.8 inches)78%very high
May Weather23°C (74°F)160 mm (6.3 inches)81%extreme
June Weather27°C (80°F)97 mm (3.8 inches)78%extreme
July Weather29°C (84°F)79 mm (3.1 inches)73%extreme
August Weather29°C (84°F)80 mm (3.1 inches)66%extreme
September Weather26°C (79°F)96 mm (3.8 inches)65%very high
October Weather20°C (68°F)120 mm (4.7 inches)72%very high
November Weather13°C (56°F)70 mm (2.8 inches)82%high
December Weather11°C (52°F)116 mm (4.6 inches)87%moderate

Compare Pittsburg's Climate with Cities Worldwide