nomadseason

September Weather in Fairmount, United States

Last updated: June 24, 2025

In September, the average temperature in Fairmount, United States is a pleasant 18°C (64°F). However, be prepared for temperature fluctuations, as it can dip to a chilly 2°C (36°F) or soar up to a warm 33°C (92°F). During this month, expect about 89 mm (3.5 in) of precipitation spread over 10 days, accompanied by an average humidity of 78%.

September Temperature in Fairmount

In September in Fairmount, the average temperature is 18°C (64°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 2°C (36°F). This diverse temperature range makes Fairmount an ideal destination for travelers seeking both warm and cooler experiences during their visit.

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 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec262834465867727164543931
Data source: Temperature data for Fairmount 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 Fairmount

In Fairmount in September, the precipitation amount is 89 mm (3.5 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 89 mm (3.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec95979112412410317012490163107105
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Fairmount

In Fairmount in September, humidity is 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
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 Weather-3°C (26°F)94 mm (3.7 inches)90%moderate
February Weather-2°C (28°F)97 mm (3.8 inches)90%moderate
March Weather1°C (35°F)91 mm (3.6 inches)87%high
April Weather8°C (46°F)124 mm (4.9 inches)88%very high
May Weather15°C (58°F)124 mm (4.9 inches)82%very high
June Weather20°C (68°F)103 mm (4.0 inches)79%very high
July Weather22°C (73°F)170 mm (6.7 inches)78%very high
August Weather21°C (71°F)123 mm (4.9 inches)76%very high
September Weather18°C (64°F)89 mm (3.5 inches)78%high
October Weather12°C (54°F)163 mm (6.4 inches)84%high
November Weather4°C (39°F)107 mm (4.2 inches)89%moderate
December Weather0°C (32°F)105 mm (4.1 inches)86%low

Compare Fairmount's Climate with Cities Worldwide