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September Weather in Fairmount, United States

Last updated: June 24, 2025

In September, the average temperature in Fairmount, United States hovers around 23°C (75°F). Expect a range between a cool 10°C (51°F) and a warm 36°C (96°F). During this month, precipitation can reach 101 mm (4.0 in) over approximately 9 days, with an average humidity level of 76%.

September Temperature in Fairmount

In September in Fairmount, the average temperature is 23°C (75°F). Maximums can reach 36°C (96°F), and minimums can be as low as 10°C (51°F). This makes Fairmount an ideal destination for travelers seeking a warm climate with comfortable days and cooler nights.

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 (75°F), with highs reaching up to 36°C (96°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec444955617076797874655147
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 total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 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 101 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec12218816014110711910713110112990147
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 76%. With an average temperature of 23°C (75°F), this humidity feels like walking through a warm, thick mist, making travel slightly sluggish and requiring frequent breaks to stay refreshed.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111110109764
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 Weather7°C (44°F)122 mm (4.8 inches)86%moderate
February Weather10°C (50°F)188 mm (7.4 inches)86%high
March Weather13°C (55°F)160 mm (6.3 inches)86%very high
April Weather16°C (62°F)141 mm (5.5 inches)82%very high
May Weather21°C (71°F)107 mm (4.2 inches)85%extreme
June Weather24°C (76°F)119 mm (4.7 inches)85%extreme
July Weather26°C (79°F)107 mm (4.2 inches)83%very high
August Weather25°C (78°F)130 mm (5.1 inches)76%very high
September Weather23°C (75°F)101 mm (4.0 inches)76%very high
October Weather18°C (65°F)129 mm (5.1 inches)80%high
November Weather11°C (52°F)90 mm (3.6 inches)88%high
December Weather8°C (47°F)147 mm (5.8 inches)88%moderate

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