September Weather in Fairmont, United States

Last updated: June 24, 2025

In September, the average temperature in Fairmont, United States is a comfortable 24°C (76°F). Expect a range that can dip to a cool 10°C (51°F) and soar to a warm 35°C (95°F). With an average of 160 mm (6.3 in) of precipitation spread over 10 days, you'll want to be prepared for some rain! Humidity levels are typically high at 79%, adding to the tropical feel of this vibrant locale.

September Temperature in Fairmont

In September in Fairmont, the average temperature is 24°C (76°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 10°C (51°F). This weather makes Fairmont a pleasant destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Fairmont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fairmont, September typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Fairmont generated using information from the Copernicus Climate Change Service.

September Precipitation in Fairmont

In Fairmont in September, the precipitation amount is 160 mm (6.3 in) over a period of 10 days.

September Precipitation Trends in Fairmont

The chart displays monthly precipitation patterns in Fairmont, 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 Fairmont, September typically receives around 160 mm (6.3 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Fairmont

In Fairmont in September, humidity is 79%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket wrapped around you, making traveling somewhat uncomfortable and sticky, as you navigate through the warmth while constantly seeking shade and hydration.

September Average Humidity in Fairmont

This chart illustrates the average monthly humidity levels in Fairmont, 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 Fairmont is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fairmont

In Fairmont 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 Fairmont.

Maximum UV Index Levels in Fairmont for September

The chart shows the monthly maximum UV Index (UVI) for Fairmont 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 Fairmont typically reaches 9, which falls under the very high exposure category.

Data source: Fairmont 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 Fairmont Compares to Other Months

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

This table compares monthly weather conditions in Fairmont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	81 mm (3.2 inches)	85%	moderate
February Weather	11°C (53°F)	89 mm (3.5 inches)	82%	high
March Weather	13°C (56°F)	65 mm (2.6 inches)	81%	very high
April Weather	18°C (64°F)	95 mm (3.7 inches)	80%	very high
May Weather	22°C (73°F)	132 mm (5.2 inches)	81%	extreme
June Weather	25°C (77°F)	147 mm (5.8 inches)	81%	extreme
July Weather	27°C (81°F)	146 mm (5.7 inches)	81%	extreme
August Weather	26°C (80°F)	176 mm (6.9 inches)	80%	very high
September Weather	24°C (76°F)	160 mm (6.3 inches)	79%	very high
October Weather	20°C (68°F)	57 mm (2.3 inches)	80%	very high
November Weather	12°C (54°F)	89 mm (3.5 inches)	85%	high
December Weather	10°C (50°F)	124 mm (4.9 inches)	86%	moderate