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
Sag Harbor's entry into September measures an average high-temperature of a pleasant 70.7°F (21.5°C), closely parallel to the preceding month. Sag Harbor's September nights witness minimal differential from the daytime temperatures, with averages of 65.1°F (18.4°C).Humidity
In September, the average relative humidity is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.17" (55mm) of precipitation.Snowfall
In Sag Harbor, snow does not fall in April through October.Ocean temperature
In September, the average ocean temperature is 68.9°F (20.5°C).Note: Most people do not find pleasure in swimming when the water temperature is 68.9°F (20.5°C). Breathing becomes increasingly difficult to manage as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:21 pm. On the last day of September, in Sag Harbor, sunrise is at 6:45 am and sunset at 6:32 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What is the average September temperature in Sag Harbor?
What is the average humidity in September in Sag Harbor?
What is the driest month in Sag Harbor?
How much does it rain in Sag Harbor in September?
When it does not snow in Sag Harbor?
What is the ocean temperature in September in Sag Harbor?
What is the average length of the day in September in Sag Harbor?
When is the sunrise / sunset in September in Sag Harbor?
How long on average sun shines in September in Sag Harbor?
What is the UV index reading in September in Sag Harbor?
Average temperature in September
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, NY
- Average sea temperature in September: 68.9°F
The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (39.8°F).
Average daylight in September /
Average sunshine in September
Sag Harbor, NY
- Average daylight in September: 12h and 3min
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 5min
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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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
Sag Harbor, 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).
Sag Harbor, New York, USA
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