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
September heralds a minor drop in average high-temperature, sliding from August's warm 79.2°F (26.2°C) to an agreeable 71.2°F (21.8°C). Nighttime temperature in Nassau experiences an average drop to a fresh 50.5°F (10.3°C) in September.Humidity
In September, the average relative humidity in Nassau, New York, is 79%.Rainfall
In Nassau, in September, it is raining for 11.6 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, there are 151.6 rainfall days, and 28.78" (731mm) of precipitation is accumulated.Snowfall
In Nassau, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of September in Nassau, sunrise is at 6:20 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:37 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index in Nassau is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What is the usual temperature for Nassau in September?
What is the average humidity in September in Nassau?
How much does it rain in Nassau in September?
When it does not snow in Nassau?
Does it snow in Nassau in September?
How many hours of daylight does Nassau have in September?
When are sunrise and sunset in September in Nassau?
How many hours of sunshine does Nassau have in September?
What is the UV index intensity in September in Nassau?
Average temperature in September
Nassau, NY
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Nassau, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Nassau, NY
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, February and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Nassau, NY
- Average humidity in September: 79%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Nassau, NY
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in September
Nassau, NY
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Nassau, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Nassau, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Nassau, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Nassau, NY
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Nassau, NY
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Nassau, NY
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Nassau, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, July, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, August, September and October (5mi).
Nassau, New York, USA
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