September weather forecast and climate
Buffalo, NY

The Niagara square with the McKinley Monument in Buffalo, New York, USA
The Niagara square with the McKinley Monument in Buffalo, New York, USA

Weather in September

September, the first month of the autumn, in Buffalo, is still a pleasant month, with average temperature varying between 72°F (22.2°C) and 56.7°F (13.7°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 78.4°F (25.8°C) in August, to an agreeable 72°F (22.2°C). In September, the average low-temperature is 56.7°F (13.7°C).

Humidity

Months with the lowest humidity are July through September, with an average relative humidity of 74%.

Rainfall

September is the month with the least rainfall in Buffalo. Rain falls for 15 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

June through September are months without snowfall.

Ocean temperature

In Buffalo, the average seawater temperature in September is 69.4°F (20.8°C).
Note: For most, swimming in 69.4°F (20.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In September, the average length of the day is 12.5h.

Sunshine

The average sunshine in Buffalo is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Buffalo?

In Buffalo, New York, in September, the average high-temperature is 72°F (22.2°C), and the average low-temperature is 56.7°F (13.7°C).

What is the least humid month in Buffalo?

July through September, with an average relative humidity of 74%, are the least humid months.

What is the average humidity in September in Buffalo?

The average relative humidity in September is 74%.

How many days does it rain in September in Buffalo?

In Buffalo, New York, in September, it is raining for 15 days, with typically 1.81" (46mm) of accumulated precipitation.

What is the driest month in Buffalo?

The month with the least rainfall in Buffalo is September when the rain falls for 15 days and typically collects 1.81" (46mm) of precipitation.

Does it snow in Buffalo in September?

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

When it does not snow in Buffalo?

In Buffalo snow does not fall in June through September.

What is the ocean temperature in September in Buffalo?

In Buffalo, New York, the average seawater temperature in September is 69.4°F (20.8°C). Swimming in 69.4°F (20.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Buffalo have in September?

In Buffalo, the average length of the day in September is 12.5h.

How many hours of sunshine does Buffalo have in September?

The average sunshine in September in Buffalo is 8.8h.

What is the UV index reading in September in Buffalo?

The average daily maximum UV index in September in Buffalo, New York, is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Buffalo, NY

Average temperature in September - Buffalo, NY
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (29.3°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).

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Average pressure in September
Buffalo, NY

Average pressure in September - Buffalo, NY
  • Average pressure in September: 30.04"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Buffalo, NY

Average wind speed in September - Buffalo, NY
  • Average wind speed in September: 7.2mph

The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

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Average humidity in September
Buffalo, NY

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

Months with the highest relative humidity are January and February (85%).
Months with the lowest relative humidity are July, August and September (74%).

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Average rainfall in September
Buffalo, NY

Average rainfall in September - Buffalo, NY
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in September
Buffalo, NY

Average rainfall days in September - Buffalo, NY
  • Average rainfall days in September: 15 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (7.6 days).

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Average snowfall in September
Buffalo, NY

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

The month with the highest snowfall is February (7.64").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Buffalo, NY

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 (19 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Buffalo, NY

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).

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Average daylight in September /
Average sunshine in September
Buffalo, NY

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 the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 2.3h).

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Average sunshine days in September
Buffalo, NY

Average sunshine days in September - Buffalo, NY
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (6.3 days).

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Average UV index in September
Buffalo, NY

Average UV index in September - Buffalo, NY
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in September
Buffalo, NY

Average cloud cover in September - Buffalo, NY
  • Average cloud cover in September: 34

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Buffalo, NY

Average visibility in September - Buffalo, NY
  • Average visibility in September: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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