September Weather in Grayling, United States

Last updated: June 24, 2025

In September, the average temperature in Grayling, United States is a pleasant 15°C (60°F), but be prepared for a range that can dip to a brisk -1°C (30°F) and soar up to a warm 33°C (92°F). With an average precipitation of 79 mm (3.1 in) spread over 10 days, the month brings a fair share of showers, complemented by an average humidity of 79% that adds a touch of warmth to the air. Stay ready for a fluctuating climate!

September Temperature in Grayling

In September in Grayling, the average temperature is 15°C (60°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as -1°C (30°F). Be prepared for a wide range of temperatures, making it ideal for layering your clothing while exploring the area.

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

The chart illustrates September temperature patterns in Grayling, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grayling, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (92°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Grayling

In Grayling in September, the precipitation amount is 79 mm (3.1 in) over a span of 10 days.

September Precipitation Trends in Grayling

The chart displays monthly precipitation patterns in Grayling, 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 Grayling, September typically receives around 79 mm (3.1 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 Grayling

In Grayling in September, humidity is 79%. With an average temperature of 15°C (60°F), this humidity feels like a warm, enveloping blanket that can make traveling feel muggy and a bit stifling, requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Grayling

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

In Grayling 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 Grayling.

Maximum UV Index Levels in Grayling for September

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

Data source: Grayling 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 Grayling Compares to Other Months

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

This table compares monthly weather conditions in Grayling, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	54 mm (2.1 inches)	92%	low
February Weather	-7°C (20°F)	63 mm (2.5 inches)	91%	moderate
March Weather	-1°C (30°F)	59 mm (2.3 inches)	87%	moderate
April Weather	5°C (41°F)	97 mm (3.8 inches)	85%	high
May Weather	13°C (55°F)	112 mm (4.4 inches)	79%	very high
June Weather	18°C (65°F)	130 mm (5.1 inches)	75%	very high
July Weather	21°C (70°F)	99 mm (3.9 inches)	75%	very high
August Weather	20°C (67°F)	101 mm (4.0 inches)	75%	very high
September Weather	15°C (60°F)	79 mm (3.1 inches)	79%	high
October Weather	9°C (48°F)	132 mm (5.2 inches)	85%	moderate
November Weather	1°C (34°F)	70 mm (2.8 inches)	88%	moderate
December Weather	-3°C (26°F)	71 mm (2.8 inches)	89%	low