September Weather in Saint Mary-of-the-Woods, United States

Last updated: June 24, 2025

In Saint Mary-of-the-Woods, United States, the average temperature in September hovers around 22°C (71°F). However, be prepared for a range, as temperatures can dip to a minimum of 7°C (44°F) and soar to a maximum of 33°C (92°F). During this month, you can expect about 65 mm (2.5 in) of precipitation over roughly 6 days, with an average humidity level of 79%.

September Temperature in Saint Mary-of-the-Woods

In September in Saint Mary-of-the-Woods, the average temperature is 22°C (71°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 7°C (44°F). This makes Saint Mary-of-the-Woods an ideal destination for travelers seeking pleasant weather and the opportunity to experience a range of outdoor activities.

September Weather in Saint Mary-of-the-Woods: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint Mary-of-the-Woods, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Mary-of-the-Woods, September typically has an average temperature of 22°C (71°F), with highs reaching up to 33°C (92°F) and lows dropping to around 7°C (44°F).

Data source: Temperature data for Saint Mary-of-the-Woods generated using information from the Copernicus Climate Change Service.

September Precipitation in Saint Mary-of-the-Woods

In Saint Mary-of-the-Woods in September, the precipitation amount is 65 mm (2.5 in) during a period of 6 days.

September Precipitation Trends in Saint Mary-of-the-Woods

The chart displays monthly precipitation patterns in Saint Mary-of-the-Woods, 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 Saint Mary-of-the-Woods, September typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 6 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 Saint Mary-of-the-Woods

In Saint Mary-of-the-Woods in September humidity is 79%. With an average temperature of 22°C (71°F), this humidity feels like a warm, sticky embrace that can make any outdoor adventure quite challenging for traveling; it's advisable to stay hydrated and take breaks in the shade to fully enjoy the sights.

September Average Humidity in Saint Mary-of-the-Woods

This chart illustrates the average monthly humidity levels in Saint Mary-of-the-Woods, 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 Saint Mary-of-the-Woods 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 Saint Mary-of-the-Woods

In Saint Mary-of-the-Woods in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Saint Mary-of-the-Woods.

Maximum UV Index Levels in Saint Mary-of-the-Woods for September

The chart shows the monthly maximum UV Index (UVI) for Saint Mary-of-the-Woods 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 Saint Mary-of-the-Woods typically reaches 8, which falls under the very high exposure category.

Data source: Saint Mary-of-the-Woods 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 Saint Mary-of-the-Woods Compares to Other Months

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

This table compares monthly weather conditions in Saint Mary-of-the-Woods, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	83 mm (3.2 inches)	84%	moderate
February Weather	1°C (34°F)	89 mm (3.5 inches)	82%	moderate
March Weather	7°C (44°F)	128 mm (5.0 inches)	84%	high
April Weather	12°C (54°F)	109 mm (4.3 inches)	83%	very high
May Weather	19°C (66°F)	132 mm (5.2 inches)	80%	very high
June Weather	24°C (75°F)	108 mm (4.3 inches)	83%	extreme
July Weather	26°C (78°F)	109 mm (4.3 inches)	82%	very high
August Weather	24°C (75°F)	100 mm (4.0 inches)	82%	very high
September Weather	22°C (71°F)	65 mm (2.5 inches)	79%	very high
October Weather	15°C (59°F)	113 mm (4.5 inches)	79%	high
November Weather	6°C (43°F)	92 mm (3.6 inches)	88%	moderate
December Weather	3°C (37°F)	80 mm (3.1 inches)	87%	moderate