September Weather in Ottertail, United States

Last updated: June 24, 2025

In September, the average temperature in Ottertail, United States hovers around 16°C (60°F). Expect a range from a chilly -1°C (31°F) to a warm 30°C (87°F). With 89 mm (3.5 in) of precipitation spread over 10 days, don't forget your umbrella! The atmosphere can feel quite humid, with an average humidity level of 77%.

September Temperature in Ottertail

In September in Ottertail, the average temperature is 16°C (60°F). Maximum can reach 30°C (87°F) and minimum can be as low as -1°C (31°F). This variation makes it a perfect destination for travelers seeking both warm days and cool nights.

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

The chart illustrates September temperature patterns in Ottertail, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ottertail, September typically has an average temperature of 16°C (60°F), with highs reaching up to 30°C (87°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Ottertail

In Ottertail in September, the precipitation amount is 89 mm (3.5 in) over a period of 10 days.

September Precipitation Trends in Ottertail

The chart displays monthly precipitation patterns in Ottertail, 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 Ottertail, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 10 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 Ottertail

In Ottertail in September, humidity is 77%. With an average temperature of 16°C (60°F), this humidity feels like a moist blanket wrapping around you, making outdoor activities a bit uncomfortable and requiring frequent hydration as you soak in the vibrant local culture.

September Average Humidity in Ottertail

This chart illustrates the average monthly humidity levels in Ottertail, 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 Ottertail 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 Ottertail

In Ottertail 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 Ottertail.

Maximum UV Index Levels in Ottertail for September

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

Data source: Ottertail 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 Ottertail Compares to Other Months

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

This table compares monthly weather conditions in Ottertail, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	19 mm (0.8 inches)	90%	low
February Weather	-12°C (10°F)	23 mm (0.9 inches)	92%	moderate
March Weather	-2°C (28°F)	33 mm (1.3 inches)	85%	moderate
April Weather	4°C (39°F)	59 mm (2.3 inches)	81%	high
May Weather	13°C (56°F)	62 mm (2.4 inches)	75%	very high
June Weather	20°C (69°F)	74 mm (2.9 inches)	79%	very high
July Weather	22°C (72°F)	94 mm (3.7 inches)	76%	very high
August Weather	20°C (68°F)	121 mm (4.8 inches)	78%	very high
September Weather	16°C (60°F)	89 mm (3.5 inches)	77%	high
October Weather	7°C (44°F)	94 mm (3.7 inches)	79%	moderate
November Weather	-2°C (29°F)	25 mm (1.0 inches)	86%	moderate
December Weather	-8°C (18°F)	46 mm (1.8 inches)	86%	low