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September Weather in Buffalo, United States

Last updated: June 24, 2025

In September, the average temperature in Buffalo, United States hovers around 16°C (62°F). Expect some variability, with minimum temperatures dipping to -1°C (30°F) and maximums soaring up to 35°C (95°F). During this time, the region experiences approximately 42 mm (1.6 in) of precipitation spread over 5 days, and humidity levels are comfortably high at 77%.

September Temperature in Buffalo

In September in Buffalo, the average temperature is 16°C (62°F), with maximums reaching 35°C (95°F) and minimums dropping as low as -1°C (30°F). Overall, it's advisable to pack for a range of weather conditions while traveling to Buffalo during this time.

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 16°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec221833415468747061443527
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 42 mm (1.6 in) over a period of 5 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 42 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec112028587745664042501320
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 77%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel heavy and draining, so travelers may want to plan for breaks in shaded areas and stay hydrated.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%70%70%76%84%85%85%77%73%74%79%
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 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 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101098532
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 Weather-5°C (22°F)11 mm (0.4 inches)77%low
February Weather-8°C (18°F)20 mm (0.8 inches)80%moderate
March Weather1°C (33°F)28 mm (1.1 inches)70%moderate
April Weather5°C (41°F)58 mm (2.3 inches)70%very high
May Weather12°C (54°F)77 mm (3.0 inches)76%very high
June Weather20°C (68°F)45 mm (1.8 inches)84%very high
July Weather23°C (74°F)66 mm (2.6 inches)85%very high
August Weather21°C (71°F)40 mm (1.6 inches)84%very high
September Weather16°C (62°F)42 mm (1.6 inches)77%very high
October Weather7°C (44°F)50 mm (2.0 inches)73%moderate
November Weather1°C (35°F)13 mm (0.5 inches)74%moderate
December Weather-3°C (28°F)20 mm (0.8 inches)79%low

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