Buffalo
New York, USA
Long-term weather forecast
Long-term weather forecast

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
The first month of the autumn, September, is still a pleasant month in Buffalo, New York, with average temperature fluctuating between 71.1°F (21.7°C) and 53.4°F (11.9°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 78.4°F (25.8°C) in August, to a pleasant 71.1°F (21.7°C). The average low-temperature, in Buffalo, is 53.4°F (11.9°C).

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Buffalo, during September, the rain falls for 11.4 days and regularly aggregates up to 3.9" (99.1mm) of precipitation. Throughout the year, there are 166.5 rainfall days, and 40.5" (1028.3mm) of precipitation is accumulated.

Snowfall

In Buffalo, it doesn't snow. In October, it regularly snows. In Buffalo, during the entire year, snow aggregates up to 94.7" (2405.5mm).

Ocean temperature

In Buffalo, the average seawater temperature 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).

Daylight

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

Sunshine

The average sunshine in September is 6.9h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for the average person.
The average daily UV index of 6 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Buffalo?

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

What is the average humidity in September in Buffalo?

In Buffalo, New York, the average relative humidity in September is 74%.

How much does it rain in Buffalo in September?

In Buffalo, New York, in September, it is raining for 11.4 days, with typically 3.9" (99.1mm) of accumulated precipitation.

Does it snow in Buffalo in September?

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

How cold is the water in September in Buffalo?

In September, the average ocean temperature is 69.4°F (20.8°C). 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).

What is the average length of the day in September in Buffalo?

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

How many hours of sunshine does Buffalo have in September?

In Buffalo, New York, the average sunshine in September is 6.9h.

What is the UV index intensity in September in Buffalo?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.
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).