September Weather in Garrison, United States

Last updated: June 24, 2025

In September, the average temperature in Garrison, United States is a pleasant 21°C (70°F). Expect a minimum of 7°C (45°F) on cooler days and peaks reaching up to 36°C (98°F) during warmer spells. Be prepared for occasional rain, as the area receives an average precipitation of 114 mm (4.5 in) over about 9 days. With an average humidity of 73%, the climate is sure to offer a refreshing experience!

September Temperature in Garrison

In September in Garrison, the average temperature is 21°C (70°F). The maximum can reach 36°C (98°F), while the minimum can drop as low as 7°C (45°F). This variation makes it advisable for travelers to pack layers to ensure comfort throughout the day.

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

The chart illustrates September temperature patterns in Garrison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Garrison, September typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (98°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Garrison

In Garrison in September, the precipitation amount is 114 mm (4.5 in) over the course of 9 days.

September Precipitation Trends in Garrison

The chart displays monthly precipitation patterns in Garrison, 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 Garrison, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 9 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 Garrison

In Garrison in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Garrison

This chart illustrates the average monthly humidity levels in Garrison, 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 Garrison is approximately 73%, 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 Garrison

In Garrison 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 Garrison.

Maximum UV Index Levels in Garrison for September

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

Data source: Garrison 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 Garrison Compares to Other Months

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

This table compares monthly weather conditions in Garrison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	91 mm (3.6 inches)	88%	moderate
February Weather	4°C (40°F)	130 mm (5.1 inches)	88%	moderate
March Weather	8°C (47°F)	113 mm (4.4 inches)	87%	high
April Weather	13°C (55°F)	133 mm (5.3 inches)	85%	very high
May Weather	19°C (66°F)	133 mm (5.2 inches)	81%	very high
June Weather	22°C (73°F)	175 mm (6.9 inches)	82%	very high
July Weather	25°C (77°F)	119 mm (4.7 inches)	81%	very high
August Weather	24°C (75°F)	122 mm (4.8 inches)	73%	very high
September Weather	21°C (70°F)	114 mm (4.5 inches)	73%	very high
October Weather	15°C (60°F)	118 mm (4.6 inches)	78%	high
November Weather	7°C (45°F)	80 mm (3.1 inches)	89%	moderate
December Weather	4°C (40°F)	118 mm (4.7 inches)	87%	moderate