nomadseason

September Weather in Metropolis, United States

Last updated: June 24, 2025

In September, the average temperature in Metropolis, United States is a pleasant 23°C (74°F). However, temperatures can vary significantly, with a minimum of 9°C (49°F) and a maximum of 37°C (98°F). Expect some rain as well, with an average precipitation of 79 mm (3.1 in) spread over 7 days, and keep in mind the average humidity level is around 75%, making for a warm and somewhat sticky atmosphere.

September Temperature in Metropolis

In September in Metropolis, the average temperature is 23°C (74°F), with maximums reaching 37°C (98°F) and minimums dropping as low as 9°C (49°F). Be prepared for warm days and cooler nights when traveling to this destination.

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

The chart illustrates September temperature patterns in Metropolis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Metropolis, September typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec374050576977807874624743
Data source: Temperature data for Metropolis 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 Metropolis

In Metropolis in September, the total precipitation amount is 79 mm (3.1 in) distributed over a period of 7 days.

September Precipitation Trends in Metropolis

The chart displays monthly precipitation patterns in Metropolis, 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 Metropolis, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061401511371411029479791279397
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Metropolis

In Metropolis 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 Metropolis

This chart illustrates the average monthly humidity levels in Metropolis, 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 Metropolis 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 Metropolis

In Metropolis 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 Metropolis.

Maximum UV Index Levels in Metropolis for September

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

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

This table compares monthly weather conditions in Metropolis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)106 mm (4.2 inches)86%moderate
February Weather5°C (41°F)140 mm (5.5 inches)84%high
March Weather10°C (50°F)151 mm (6.0 inches)84%high
April Weather14°C (58°F)137 mm (5.4 inches)80%very high
May Weather21°C (69°F)141 mm (5.5 inches)82%extreme
June Weather25°C (77°F)102 mm (4.0 inches)83%extreme
July Weather27°C (81°F)94 mm (3.7 inches)79%very high
August Weather25°C (78°F)79 mm (3.1 inches)76%very high
September Weather23°C (74°F)79 mm (3.1 inches)75%very high
October Weather16°C (62°F)127 mm (5.0 inches)74%high
November Weather8°C (47°F)93 mm (3.7 inches)85%moderate
December Weather6°C (43°F)97 mm (3.8 inches)88%moderate

Compare Metropolis's Climate with Cities Worldwide