September Weather in Fergus Falls, United States

Last updated: June 24, 2025

In Fergus Falls, United States, the average temperature in September is a mild 16°C (61°F). However, temperatures can vary significantly, ranging from a chilly 0°C (32°F) to a warm 32°C (89°F). Expect about 94 mm (3.7 in) of precipitation over 9 days, contributing to an average humidity of 77%. Be prepared for both warm days and cooler nights!

September Temperature in Fergus Falls

In September in Fergus Falls, the average temperature is 16°C (61°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 0°C (32°F). It's a great time to pack versatile clothing to enjoy both warm days and cool nights during your travels.

September Weather in Fergus Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Fergus Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fergus Falls, September typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (89°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Fergus Falls

In Fergus Falls in September, the precipitation amount reaches 94 mm (3.7 in) over the course of 9 days.

September Precipitation Trends in Fergus Falls

The chart displays monthly precipitation patterns in Fergus Falls, 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 Fergus Falls, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Fergus Falls

In Fergus Falls in September humidity is 77%. With an average temperature of 16°C (61°F), this humidity feels like a slight heaviness in the air, making every step feel a touch more effortful while traveling. The dampness clings to your skin, adding a layer of discomfort, yet the mild temperature invites you to explore the surroundings, blending the challenge of the humidity with an opportunity for a refreshing adventure.

September Average Humidity in Fergus Falls

This chart illustrates the average monthly humidity levels in Fergus Falls, 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 Fergus Falls is approximately 77%, 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 Fergus Falls

In Fergus Falls 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 Fergus Falls.

Maximum UV Index Levels in Fergus Falls for September

The chart shows the monthly maximum UV Index (UVI) for Fergus Falls 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 Fergus Falls typically reaches 7, which falls under the high exposure category.

Data source: Fergus Falls 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 Fergus Falls Compares to Other Months

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

This table compares monthly weather conditions in Fergus Falls, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-11°C (12°F)	19 mm (0.7 inches)	90%	low
February Weather	-12°C (11°F)	22 mm (0.9 inches)	92%	moderate
March Weather	-2°C (29°F)	33 mm (1.3 inches)	85%	moderate
April Weather	4°C (40°F)	61 mm (2.4 inches)	81%	high
May Weather	14°C (57°F)	71 mm (2.8 inches)	75%	very high
June Weather	21°C (70°F)	68 mm (2.7 inches)	79%	very high
July Weather	23°C (73°F)	100 mm (3.9 inches)	76%	very high
August Weather	20°C (69°F)	124 mm (4.9 inches)	78%	very high
September Weather	16°C (61°F)	94 mm (3.7 inches)	77%	high
October Weather	7°C (45°F)	90 mm (3.5 inches)	79%	moderate
November Weather	-1°C (30°F)	23 mm (0.9 inches)	86%	moderate
December Weather	-7°C (19°F)	41 mm (1.6 inches)	86%	low