Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Seaford, the average high-temperature in September slightly decreases from a warm 78.4°F (25.8°C) in August to an agreeable 72.3°F (22.4°C). Seaford registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 65.7°F (18.7°C) during September.Humidity
In Seaford, the average relative humidity in September is 74%.Rainfall
In September, the rain falls for 13.2 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in Seaford, there are 158.8 rainfall days, and 31.38" (797mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Ocean temperature
In September, the average ocean temperature in Seaford is 70.2°F (21.2°C).Note: In water with a temperature of 70.2°F (21.2°C), most people do not enjoy swimming. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), breathing becomes increasingly difficult to control.
Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in Seaford, sunrise is at 6:21 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
In Seaford, New York, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Heed this! UV intensity is much stronger when reflected off sand and water.
Frequently asked questions
What is the temperature in September in Seaford?
What is the average humidity in September in Seaford?
How much does it rain in Seaford in September?
When it does not snow in Seaford?
Does it snow in Seaford in September?
What is the ocean temperature in September in Seaford?
What is the average length of the day in September in Seaford?
When are sunrise and sunset in September in Seaford?
How many hours of sunshine does Seaford have in September?
How high is the UV index in September in Seaford?
Average temperature in September
Seaford, NY
- Average high temperature in September: 72.3°F
The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 65.7°F
The months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in September
Seaford, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Seaford, NY
- Average wind speed in September: 10.5mph
The windiest month (with the highest average wind speed) is January (13.9mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in September
Seaford, NY
- Average humidity in September: 74%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
Seaford, NY
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.89").
Average rainfall days in September
Seaford, NY
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in September
Seaford, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Seaford, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in September
Seaford, NY
- Average sea temperature in September: 70.1°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).
Average daylight in September /
Average sunshine in September
Seaford, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Seaford, NY
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Seaford, 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
Seaford, NY
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Seaford, 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).
Seaford, New York, USA
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