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

September weather forecast and climate
Greenport, NY

September, the first month of the autumn, in Greenport, is also an agreeable month, with average temperature ranging between max 70.7°F (21.5°C) and min 65.1°F (18.4°C).

Temperature

In Greenport, the average high-temperature is essentially the same as in August - a pleasant 70.7°F (21.5°C). In September, the average low-temperature is 65.1°F (18.4°C).

Humidity

In September, the average relative humidity in Greenport is 76%.

Rainfall

September is the month with the least rainfall in Greenport. Rain falls for 12.6 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

In Greenport snow does not fall in April through October.

Ocean temperature

In Greenport, the average seawater temperature is 68.2°F (20.1°C).
Note: For swimming, a surface water temperature of 68.2°F (20.1°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 in Greenport is 12.4h.

Sunshine

In Greenport, the average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index in Greenport is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Greenport?

The average high-temperature, in September, is 70.7°F (21.5°C), while the average low-temperature is 65.1°F (18.4°C).

What is the average humidity in September in Greenport?

The average relative humidity in September is 76%.

How much does it rain in Greenport in September?

In Greenport, New York, in September, it is raining for 12.6 days, with typically 2.17" (55mm) of accumulated precipitation.

What is the driest month in Greenport?

The month with the least rainfall in Greenport is September when the rain falls for 12.6 days and typically collects 2.17" (55mm) of precipitation.

When it does not snow in Greenport?

April through October are months without snowfall in Greenport, New York.

What is the ocean temperature in September in Greenport?

In Greenport, New York, in September, the average water temperature is 68.2°F (20.1°C). For most, swimming in 68.2°F (20.1°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 Greenport?

In Greenport, the average length of the day in September is 12.4h.

How many hours of sunshine does Greenport have in September?

In September, the average sunshine is 8.8h.

How high is the UV index in September in Greenport?

In Greenport, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Greenport, NY
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average humidity in September - Greenport, NY
  • Average humidity in September: 76%

Months with the highest relative humidity are May and June (81%).
The month with the lowest relative humidity is November (72%).

Average rainfall in September - Greenport, NY
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the lowest rainfall) is September (2.17").

Average rainfall days in September - Greenport, NY
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (15.3 days).
The month with the lowest number of rainy days is January (9.1 days).

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

The month with the highest snowfall is March (2.36").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (4.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Greenport, NY
  • Average sea temperature in September: 68.2°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight in September / Average sunshine in September - Greenport, NY
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.8h

Months with most sunshine are July and August (Average sunshine: 10.6h).
The month with least sunshine is December (Average sunshine: 4.6h).

Average UV index in September - Greenport, NY
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March and December (UV index 2).