September Weather in Grey Forest, United States

Last updated: June 24, 2025

In September, the average temperature in Grey Forest, United States hovers around 26°C (80°F), with a minimum of 11°C (53°F) and a peak reaching 39°C (102°F). Expect about 115 mm (4.5 in) of precipitation spread across 10 days, accompanied by an average humidity of 65%. Embrace the warmth, but don't forget your umbrella!

September Temperature in Grey Forest

In September in Grey Forest, the average temperature is 26°C (80°F). Maximums can reach 39°C (102°F), and minimums can be as low as 11°C (53°F). Be sure to pack accordingly to enjoy a range of activities in this diverse climate!

September Weather in Grey Forest: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Grey Forest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grey Forest, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Grey Forest

In Grey Forest in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

September Precipitation Trends in Grey Forest

The chart displays monthly precipitation patterns in Grey Forest, 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 Grey Forest, September typically receives around 115 mm (4.5 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 Grey Forest

In Grey Forest in September humidity is 65%. With an average temperature of 26°C (80°F), this humidity feels like a warm, sticky embrace, making travel less comfortable as you navigate the sights.

September Average Humidity in Grey Forest

This chart illustrates the average monthly humidity levels in Grey Forest, 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 Grey Forest is approximately 65%, 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 Grey Forest

In Grey Forest in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Grey Forest.

Maximum UV Index Levels in Grey Forest for September

The chart shows the monthly maximum UV Index (UVI) for Grey Forest 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 Grey Forest typically reaches 11, which falls under the extreme exposure category.

Data source: Grey Forest 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 Grey Forest Compares to Other Months

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

This table compares monthly weather conditions in Grey Forest, 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 (52°F)	42 mm (1.7 inches)	79%	moderate
February Weather	12°C (55°F)	54 mm (2.1 inches)	79%	very high
March Weather	18°C (64°F)	63 mm (2.5 inches)	74%	very high
April Weather	21°C (69°F)	70 mm (2.8 inches)	76%	extreme
May Weather	25°C (77°F)	123 mm (4.8 inches)	81%	extreme
June Weather	28°C (82°F)	72 mm (2.8 inches)	76%	extreme
July Weather	29°C (84°F)	61 mm (2.4 inches)	66%	extreme
August Weather	29°C (85°F)	48 mm (1.9 inches)	58%	extreme
September Weather	26°C (80°F)	115 mm (4.5 inches)	65%	extreme
October Weather	22°C (71°F)	81 mm (3.2 inches)	74%	very high
November Weather	16°C (61°F)	43 mm (1.7 inches)	81%	high
December Weather	13°C (55°F)	56 mm (2.2 inches)	86%	moderate