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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 19°C (66°F). Expect a range that can dip as low as 7°C (44°F) and peak at 30°C (86°F). With 75 mm (3.0 in) of precipitation spread over 9 days, you might want to pack an umbrella! Additionally, the air is quite humid, with an average humidity level of 76%.

September Temperature in Buffalo

In September in Buffalo, the average temperature is 19°C (66°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as 7°C (44°F). This range makes Buffalo a suitable destination for travelers seeking pleasant weather and comfortable outdoor activities 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 19°C (66°F), with highs reaching up to 30°C (86°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec282935445666737265554134
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 75 mm (3.0 in) distributed over 9 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 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7782721161018112583751288791
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 76%. With an average temperature of 19°C (66°F), this humidity feels like a warm, thick blanket wrapping around you, making travel mildly uncomfortable and encouraging frequent breaks in shaded or air-conditioned areas.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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-2°C (28°F)77 mm (3.0 inches)91%low
February Weather-2°C (29°F)82 mm (3.2 inches)91%moderate
March Weather2°C (35°F)72 mm (2.8 inches)88%moderate
April Weather7°C (44°F)116 mm (4.6 inches)88%very high
May Weather13°C (56°F)101 mm (4.0 inches)82%very high
June Weather19°C (67°F)81 mm (3.2 inches)79%very high
July Weather23°C (73°F)125 mm (4.9 inches)77%very high
August Weather22°C (72°F)83 mm (3.3 inches)72%very high
September Weather19°C (66°F)75 mm (3.0 inches)76%high
October Weather13°C (55°F)128 mm (5.0 inches)83%moderate
November Weather5°C (42°F)87 mm (3.4 inches)88%moderate
December Weather1°C (34°F)91 mm (3.6 inches)87%low

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