September weather forecastMastic Beach, NY
September
Weather in September
September, the first month of the autumn in Mastic Beach, is still a pleasant month, with temperature in the range of an average high of 71.4°F (21.9°C) and an average low of 65.3°F (18.5°C).Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 77.5°F (25.3°C) to an agreeable 71.4°F (21.9°C). Mastic Beach consistently logs a low temperature averaging a comfortable 65.3°F (18.5°C) during September, a modest drop from daytime temperatures.Humidity
In September, the average relative humidity is 75%.Rainfall
The months with the least rainfall in Mastic Beach are January, February and September Rain falls for 12.4 days and accumulates 2.01" (51mm) of rain.Snowfall
In Mastic Beach, snow does not fall in May through October.Daylight
In Mastic Beach, New York, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:19 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:34 pm EDT.
Sunshine
In September, the average sunshine in Mastic Beach, New York, is 9.1h.UV index
The average daily maximum UV index in September in Mastic Beach is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mastic Beach, NY
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in September: 65.3°F
The months with the highest average low temperature are July and August (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Mastic Beach, 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
Mastic Beach, NY
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.6mph).
Average humidity in September
Mastic Beach, NY
- Average humidity in September: 75%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
Mastic Beach, NY
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is December (3.31").
The driest months (with the least rainfall) are January, February and September (2.01").
Average rainfall days in September
Mastic Beach, NY
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (9 days).
Average snowfall in September
Mastic Beach, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mastic Beach, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mastic Beach, NY
- Average daylight in September: 12h and 30min
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 6min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Mastic Beach, NY
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Mastic Beach, 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
Mastic Beach, NY
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Mastic Beach, 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).
