September Weather in Buffalo, United States

Last updated: June 24, 2025

In September, the average temperature in Buffalo, United States is a pleasant 17°C (64°F). However, be prepared for some variation, as temperatures can dip to a chilly 1°C (34°F) or soar to a warm 32°C (91°F). Travelers can expect 112 mm (4.4 in) of precipitation spread over 10 days, contributing to an average humidity level of 81%. Enjoy the diverse climate while exploring!

September Temperature in Buffalo

In September, in Buffalo, the average temperature is 17°C (64°F). Maximums can reach 32°C (91°F), while minimums can drop as low as 1°C (34°F). This diverse temperature range makes Buffalo an exciting destination for travelers, offering both warm days and cooler evenings to enjoy.

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

The chart illustrates September temperature patterns in Buffalo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Buffalo, September typically has an average temperature of 17°C (64°F), with highs reaching up to 32°C (91°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Buffalo

In Buffalo in September, the total precipitation amount is 112 mm (4.4 in) over the course of 10 days.

September Precipitation Trends in Buffalo

The chart displays monthly precipitation patterns in Buffalo, 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 Buffalo, September typically receives around 112 mm (4.4 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 Buffalo

In Buffalo in September, humidity is 81%. With an average temperature of 17°C (64°F), this humidity feels like walking through a warm mist, enveloping you in a sticky embrace that can quickly lead to discomfort during long sightseeing excursions.

September Average Humidity in Buffalo

This chart illustrates the average monthly humidity levels in Buffalo, 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 Buffalo is approximately 81%, 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 Buffalo

In Buffalo 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 Buffalo.

Maximum UV Index Levels in Buffalo for September

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

Data source: Buffalo 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 Buffalo Compares to Other Months

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

This table compares monthly weather conditions in Buffalo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	21 mm (0.8 inches)	87%	low
February Weather	-9°C (16°F)	28 mm (1.1 inches)	90%	moderate
March Weather	0°C (32°F)	53 mm (2.1 inches)	85%	moderate
April Weather	6°C (43°F)	88 mm (3.5 inches)	84%	high
May Weather	15°C (59°F)	106 mm (4.2 inches)	78%	very high
June Weather	22°C (72°F)	77 mm (3.0 inches)	80%	very high
July Weather	23°C (74°F)	93 mm (3.6 inches)	81%	very high
August Weather	21°C (71°F)	150 mm (5.9 inches)	81%	very high
September Weather	17°C (64°F)	112 mm (4.4 inches)	81%	high
October Weather	9°C (48°F)	102 mm (4.0 inches)	84%	moderate
November Weather	0°C (33°F)	33 mm (1.3 inches)	88%	moderate
December Weather	-5°C (23°F)	45 mm (1.8 inches)	84%	low