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September Weather in Fairmount, United States

Last updated: June 24, 2025

In Fairmount, United States, the average temperature in September hovers around 23°C (73°F). While the minimum dips to a cool 9°C (49°F), the mercury can rise to a sizzling 35°C (95°F). Expect around 114 mm (4.5 in) of precipitation spread over 10 days, with an average humidity of 64%. Enjoy the dynamic climate!

September Temperature in Fairmount

In September in Fairmount, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 9°C (49°F). This diverse weather makes it a perfect time for travelers to pack a variety of clothing for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Fairmount, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fairmount, September typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653596975787773634945
Data source: Temperature data for Fairmount 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 Fairmount

In Fairmount in September, the precipitation amount is 114 mm (4.5 in) over a period of 10 days.

September Precipitation Trends in Fairmount

The chart displays monthly precipitation patterns in Fairmount, 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 Fairmount, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10717718416811812313013611413876145
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fairmount

In Fairmount in September, humidity is 64%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel quite comfortable yet slightly sticky, urging travelers to enjoy leisurely activities early in the day or seek shade during peak hours.

September Average Humidity in Fairmount

This chart illustrates the average monthly humidity levels in Fairmount, 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 Fairmount is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fairmount

In Fairmount 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 Fairmount.

Maximum UV Index Levels in Fairmount for September

The chart shows the monthly maximum UV Index (UVI) for Fairmount 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 Fairmount typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Fairmount 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 Fairmount Compares to Other Months

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

This table compares monthly weather conditions in Fairmount, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)107 mm (4.2 inches)87%moderate
February Weather8°C (47°F)177 mm (7.0 inches)87%high
March Weather12°C (53°F)184 mm (7.2 inches)85%very high
April Weather15°C (59°F)168 mm (6.6 inches)82%very high
May Weather21°C (69°F)118 mm (4.6 inches)83%extreme
June Weather24°C (75°F)123 mm (4.8 inches)82%extreme
July Weather26°C (78°F)130 mm (5.1 inches)78%extreme
August Weather25°C (77°F)136 mm (5.4 inches)67%very high
September Weather23°C (73°F)114 mm (4.5 inches)64%very high
October Weather17°C (64°F)138 mm (5.4 inches)74%high
November Weather9°C (49°F)76 mm (3.0 inches)87%moderate
December Weather7°C (45°F)145 mm (5.7 inches)88%moderate

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