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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 27°C (81°F), creating a warm and inviting atmosphere. However, be prepared for temperature fluctuations, as it can drop to a cool 11°C (52°F) and soar as high as 39°C (103°F). Expect 96 mm (3.8 in) of precipitation over approximately 10 days, accompanied by an average humidity level of 69%, making it a perfect month for enjoying the unique climate!

September Temperature in Buffalo

In September in Buffalo, the average temperature is 27°C (81°F). Maximums can reach 39°C (103°F), while minimums can dip as low as 11°C (52°F). Be prepared for warm days and cooler nights when planning your travels.

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 27°C (81°F), with highs reaching up to 39°C (103°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec505262677582858680705954
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 total precipitation amount is 96 mm (3.8 in) over a span 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 96 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec981221051331719471939612774107
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 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111121110864
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 Weather10°C (50°F)98 mm (3.9 inches)79%moderate
February Weather11°C (52°F)122 mm (4.8 inches)80%high
March Weather17°C (63°F)105 mm (4.1 inches)78%very high
April Weather19°C (67°F)133 mm (5.2 inches)79%extreme
May Weather24°C (76°F)171 mm (6.7 inches)81%extreme
June Weather28°C (82°F)94 mm (3.7 inches)77%extreme
July Weather30°C (86°F)70 mm (2.8 inches)71%extreme
August Weather30°C (86°F)93 mm (3.7 inches)67%extreme
September Weather27°C (81°F)96 mm (3.8 inches)69%very high
October Weather21°C (71°F)127 mm (5.0 inches)73%very high
November Weather15°C (59°F)74 mm (2.9 inches)82%high
December Weather12°C (54°F)106 mm (4.2 inches)87%moderate

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