September weather forecast and climate
Buffalo, NY

A view of the Niagara square with the McKinley Monument in Buffalo, New York
A view of the Niagara square with the McKinley Monument in Buffalo, New York

What is the temperature in September in Buffalo?

In Buffalo, in September, the average high-temperature is 71.1°F (21.7°C), and the average low-temperature is 53.4°F (11.9°C).

How much does it rain in Buffalo in September?

In September, in Buffalo, the rain falls for 11.4 days. Throughout September, 3.9" (99.1mm) of precipitation is accumulated.

Does it snow in Buffalo in September?

In Buffalo, New York, in September, it doesn't snow. In October, it regularly snows.

What is the sea temperature in September in Buffalo?

The average seawater temperature, in September, is 69.4°F (20.8°C). For swimming, a surface water temperature of 69.4°F (20.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).
Average temperature in September - Buffalo, NY
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (31.2°F).

  • Average low temperature in September: 53.4°F

The month with the highest average low temperature is July (62.3°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average humidity in September - Buffalo, NY
  • Average humidity in September: 74%

The month with the highest relative humidity is December (77.6%).
The month with the lowest relative humidity is May (67.2%).

Average rainfall in September - Buffalo, NY
  • Average rainfall in September: 3.9"

The wettest month (with the highest rainfall) is November (4").
The driest month (with the lowest rainfall) is February (2.5").

Average rainfall days in September - Buffalo, NY
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is January (19.2 days).
The month with the lowest number of rainy days is August (10.1 days).

Average snowfall in September - Buffalo, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is December (27.4").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in September - Buffalo, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.3 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September - Buffalo, NY
  • Average sea temperature in September: 69.4°F

The best month for swimming (with the highest average sea temperature) is August (74.2°F).
The coldest month (with the lowest average sea temperature) is February (34.9°F).

Average daylight in September / Average sunshine in September - Buffalo, NY
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 6.9h

The month with most sunshine is July (Average sunshine: 9.9h).
The month with least sunshine is December (Average sunshine: 2.2h).

Average UV index in September - Buffalo, NY
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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