September Weather in Bemidji, United States

Last updated: June 24, 2025

In Bemidji, United States, the average temperature in September hovers around 15°C (59°F), with a minimum chill of -1°C (30°F) and the mercury occasionally rising to a warm 30°C (86°F). This month typically sees about 106 mm (4.2 in) of precipitation spread over approximately 12 days, culminating in an average humidity level of 77%.

September Temperature in Bemidji

In September in Bemidji, the average temperature is 15°C (59°F). Maximums can reach 30°C (86°F) and minimums can be as low as -1°C (30°F). Be prepared for a wide range of temperatures while traveling, ensuring you pack clothing suitable for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Bemidji, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bemidji, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Bemidji

In Bemidji in September, the precipitation amount is 106 mm (4.2 in), occurring over a span of 12 days.

September Precipitation Trends in Bemidji

The chart displays monthly precipitation patterns in Bemidji, 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 Bemidji, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 12 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 Bemidji

In Bemidji in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Bemidji

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

In Bemidji 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 Bemidji.

Maximum UV Index Levels in Bemidji for September

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

Data source: Bemidji 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 Bemidji Compares to Other Months

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

This table compares monthly weather conditions in Bemidji, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-13°C (10°F)	22 mm (0.9 inches)	90%	low
February Weather	-13°C (9°F)	24 mm (0.9 inches)	92%	moderate
March Weather	-3°C (27°F)	26 mm (1.0 inches)	85%	moderate
April Weather	3°C (37°F)	58 mm (2.3 inches)	81%	high
May Weather	12°C (54°F)	55 mm (2.2 inches)	75%	very high
June Weather	19°C (67°F)	78 mm (3.1 inches)	79%	very high
July Weather	21°C (71°F)	84 mm (3.3 inches)	76%	very high
August Weather	19°C (67°F)	78 mm (3.1 inches)	78%	very high
September Weather	15°C (59°F)	106 mm (4.2 inches)	77%	high
October Weather	6°C (43°F)	91 mm (3.6 inches)	79%	moderate
November Weather	-3°C (26°F)	29 mm (1.1 inches)	86%	moderate
December Weather	-9°C (16°F)	45 mm (1.8 inches)	86%	low