September Weather in Coeymans, United States

Last updated: June 24, 2025

In September, the average temperature in Coeymans, United States hovers around 18°C (65°F). Expect a minimum chill of 1°C (34°F) and the occasional peak at 32°C (90°F). Rain is not uncommon, with an average precipitation of 105 mm (4.1 in) over approximately 8 days. Additionally, the atmosphere tends to be quite humid, averaging around 72%.

September Temperature in Coeymans

In September in Coeymans, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F), and the minimum can drop to as low as 1°C (34°F). Packing layers is essential for travelers to enjoy the varied climate during this time.

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

The chart illustrates September temperature patterns in Coeymans, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coeymans, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Coeymans

In Coeymans in September, the precipitation amount is 105 mm (4.1 in) over the course of 8 days.

September Precipitation Trends in Coeymans

The chart displays monthly precipitation patterns in Coeymans, 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 Coeymans, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 8 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 Coeymans

In Coeymans in September humidity is 72%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace, making traveling somewhat uncomfortable as the air clings to your skin and the heat can be stifling, yet it's perfect for enjoying leisurely strolls under the shade.

September Average Humidity in Coeymans

This chart illustrates the average monthly humidity levels in Coeymans, 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 Coeymans is approximately 72%, 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 Coeymans

In Coeymans 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 Coeymans.

Maximum UV Index Levels in Coeymans for September

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

Data source: Coeymans 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 Coeymans Compares to Other Months

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

This table compares monthly weather conditions in Coeymans, 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 (28°F)	69 mm (2.7 inches)	89%	moderate
February Weather	-1°C (30°F)	88 mm (3.5 inches)	88%	moderate
March Weather	2°C (36°F)	76 mm (3.0 inches)	86%	high
April Weather	9°C (48°F)	125 mm (4.9 inches)	84%	very high
May Weather	15°C (60°F)	100 mm (3.9 inches)	76%	very high
June Weather	20°C (68°F)	92 mm (3.6 inches)	72%	very high
July Weather	23°C (74°F)	136 mm (5.3 inches)	66%	very high
August Weather	22°C (72°F)	108 mm (4.3 inches)	64%	very high
September Weather	18°C (65°F)	105 mm (4.1 inches)	72%	high
October Weather	12°C (55°F)	137 mm (5.4 inches)	81%	high
November Weather	4°C (40°F)	96 mm (3.8 inches)	87%	moderate
December Weather	0°C (32°F)	95 mm (3.7 inches)	84%	low