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 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
As September begins, there is a minor decrease in the average high-temperature, softly falling from a moderately hot 76.5°F (24.7°C) in August to a pleasant 71.1°F (21.7°C). Throughout September nights, Speonk records a consistent low-temperature averaging a comfortable 65.5°F (18.6°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Speonk, in September, during 12.9 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 148 rainfall days, and 29.76" (756mm) of precipitation is accumulated.Snowfall
In Speonk, snow does not fall in April, June through November.Daylight
The average length of the day in September in Speonk is 12h and 27min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:22 pm. On the last day of September, in Speonk, sunrise is at 6:47 am and sunset at 6:34 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In September, the average daily maximum UV index in Speonk is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Guard yourself - Avoiding sunburn is suggested. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Speonk?
What is the average humidity in September in Speonk?
How many days does it rain in September in Speonk?
When it does not snow in Speonk?
How many hours of daylight does Speonk have in September?
When is the sunrise / sunset in September in Speonk?
How many hours of sunshine does Speonk have in September?
What is the UV index reading in September in Speonk?
Average temperature in September
Speonk, NY
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 65.5°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).
Average pressure in September
Speonk, 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
Speonk, NY
- Average wind speed in September: 11.9mph
The windiest month (with the highest average wind speed) is January (15.4mph).
The calmest month (with the lowest average wind speed) is July (10.2mph).
Average humidity in September
Speonk, NY
- Average humidity in September: 76%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (72%).
Average rainfall in September
Speonk, NY
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is October (3.07").
The driest month (with the least rainfall) is January (1.89").
Average rainfall days in September
Speonk, NY
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Speonk, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.54").
The months with the least snowfall are April, June, July, August, September, October and November (0").
Average snowfall days in September
Speonk, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Speonk, 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: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Speonk, NY
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in September
Speonk, 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
Speonk, NY
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Speonk, 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).
Speonk, New York, USA
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