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September Weather in Buffalo, United States

Last updated: June 24, 2025

The average temperature in Buffalo, United States during September is a pleasant 23°C (74°F). However, temperatures can vary significantly, with a minimum of 5°C (42°F) and a scorching maximum of 40°C (104°F). You can expect some rain, with an average precipitation amount of 49 mm (1.9 in) spread over 6 days. With an average humidity of 67%, the weather can feel quite crisp and refreshing.

September Temperature in Buffalo

In September in Buffalo, the average temperature is 23°C (74°F). Maximum temperatures can reach 40°C (104°F), while minimum temperatures can drop to as low as 5°C (42°F). Travelers should be prepared for a wide range of temperatures during their visit.

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 23°C (74°F), with highs reaching up to 40°C (104°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec363649576778827974594739
Data source: Temperature data for Buffalo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Buffalo

In Buffalo in September, the precipitation amount is 49 mm (1.9 in) over the course of 6 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 49 mm (1.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec2513645211860445549621226
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Buffalo

In Buffalo in September humidity is 67%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making outdoor exploration pleasant yet slightly sticky, perfect for leisurely strolls but requiring occasional breaks for hydration.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%67%70%82%82%81%76%67%72%80%83%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111119753
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.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)25 mm (1.0 inches)75%moderate
February Weather2°C (37°F)13 mm (0.5 inches)76%high
March Weather10°C (50°F)64 mm (2.5 inches)67%high
April Weather14°C (57°F)52 mm (2.1 inches)70%very high
May Weather19°C (67°F)118 mm (4.6 inches)82%extreme
June Weather26°C (78°F)60 mm (2.4 inches)82%extreme
July Weather28°C (82°F)44 mm (1.7 inches)81%extreme
August Weather26°C (80°F)55 mm (2.2 inches)76%extreme
September Weather23°C (74°F)49 mm (1.9 inches)67%very high
October Weather15°C (59°F)62 mm (2.4 inches)72%high
November Weather8°C (47°F)12 mm (0.5 inches)80%moderate
December Weather4°C (40°F)26 mm (1.0 inches)83%moderate

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