September weather forecastGreenport, NY
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Greenport, New York, with an average temperature varying between 70.7°F (21.5°C) and 65.1°F (18.4°C).Temperature
Greenport experiences an average high-temperature of an agreeable 70.7°F (21.5°C) in September, subtly different from August's 75.9°F (24.4°C). Greenport experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 65.1°F (18.4°C) throughout September.Humidity
The average relative humidity in September 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
April through October are months without snowfall.Ocean temperature
In September, the average ocean temperature in Greenport is 68.2°F (20.1°C).Note: Most people find swimming in 68.2°F (20.1°C) unenjoyable. As the water temperature falls from 69.8°F (21°C) to 59°F (15°C), controlling one's breathing becomes harder.
Daylight
In September, the average length of the day in Greenport, New York, is 12h and 28min.On the first day of September, sunrise is at 6:16 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:32 pm EDT.
Sunshine
In September, the average sunshine in Greenport is 8.8h.UV index
In Greenport, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 pressure in September
Greenport, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Greenport, NY
- Average wind speed in September: 12.4mph
The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.4mph).
Average humidity in September
Greenport, NY
- Average humidity in September: 76%
The 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 least 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 least 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").
The months with the least 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).
The months with the least 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: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Greenport, NY
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Greenport, NY
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in September
Greenport, NY
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Greenport, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
