September Weather in Ossining, United States

Last updated: June 24, 2025

In September, the average temperature in Ossining, United States is a comfortable 20°C (68°F). However, you can expect a range, with minimums dipping to 6°C (43°F) and maximums soaring to 33°C (91°F). During this month, 114 mm (4.5 in) of precipitation is anticipated over 9 days, contributing to an average humidity of around 68%. Whether you're planning outdoor activities or cozy indoor days, this climate offers a blend of warmth and refreshing showers!

September Temperature in Ossining

In September in Ossining, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (91°F) while minimums can drop as low as 6°C (43°F). This makes Ossining a great destination for travelers looking to enjoy mild weather with the possibility of warm days and cool nights.

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

The chart illustrates September temperature patterns in Ossining, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ossining, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Ossining

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

September Precipitation Trends in Ossining

The chart displays monthly precipitation patterns in Ossining, 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 Ossining, 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 Ossining

In Ossining in September humidity is 68%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls while also prompting travelers to stay hydrated and seek out refreshing breaks from the heat.

September Average Humidity in Ossining

This chart illustrates the average monthly humidity levels in Ossining, 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 Ossining is approximately 68%, 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 Ossining

In Ossining 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 Ossining.

Maximum UV Index Levels in Ossining for September

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

Data source: Ossining 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 Ossining Compares to Other Months

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

This table compares monthly weather conditions in Ossining, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	70 mm (2.7 inches)	84%	moderate
February Weather	1°C (34°F)	100 mm (3.9 inches)	82%	moderate
March Weather	4°C (40°F)	90 mm (3.5 inches)	81%	high
April Weather	10°C (50°F)	119 mm (4.7 inches)	78%	very high
May Weather	15°C (60°F)	116 mm (4.6 inches)	69%	very high
June Weather	21°C (70°F)	93 mm (3.7 inches)	69%	very high
July Weather	24°C (76°F)	136 mm (5.4 inches)	62%	very high
August Weather	23°C (74°F)	116 mm (4.6 inches)	65%	very high
September Weather	20°C (68°F)	114 mm (4.5 inches)	68%	very high
October Weather	14°C (58°F)	139 mm (5.5 inches)	74%	high
November Weather	7°C (44°F)	90 mm (3.5 inches)	82%	moderate
December Weather	2°C (36°F)	109 mm (4.3 inches)	80%	low