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
In East Williston, New York, the average high-temperature in September marginally drops from a warm 79.5°F (26.4°C) in August to a pleasant 72.7°F (22.6°C). In East Williston, the average low-temperature is 64.6°F (18.1°C).Humidity
In East Williston, the average relative humidity in September is 74%.Rainfall
In September, the rain falls for 13.4 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 158.5 rainfall days, and 36.38" (924mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In East Williston, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:39 pm EDT.
Sunshine
The average sunshine in September in East Williston is 9.1h.UV index
In September, the average daily maximum UV index in East Williston is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
FAQ
What is the temperature in September in East Williston?
What is the average humidity in September in East Williston?
How many days does it rain in September in East Williston?
When it does not snow in East Williston?
Does it snow in East Williston in September?
How many hours of daylight does East Williston have in September?
When is the sunrise / sunset in September in East Williston?
How long on average sun shines in September in East Williston?
What is the UV index intensity in September in East Williston?
Average temperature in September
East Williston, NY
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in September: 64.6°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 (28.6°F).
Average pressure in September
East Williston, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
East Williston, NY
- Average wind speed in September: 9.2mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
East Williston, NY
- Average humidity in September: 74%
The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
East Williston, NY
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in September
East Williston, NY
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8 days).
Average snowfall in September
East Williston, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
East Williston, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
East Williston, NY
- Average daylight in September: 12h and 27min
The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).
- Average sunshine in September: 9h and 6min
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
East Williston, NY
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
East Williston, 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, November and December (UV index 2).
Average cloud cover in September
East Williston, NY
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
East Williston, 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).
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