September weather forecastWest Hempstead, NY
September
Weather in September
The first month of the autumn, September, is also an agreeable month in West Hempstead, New York, with an average temperature fluctuating between 72.5°F (22.5°C) and 64.6°F (18.1°C).Temperature
During the shift to September, West Hempstead records a mild decrease in average high-temperature, moving from a moderately hot 79.2°F (26.2°C) in August to an agreeable 72.5°F (22.5°C). West Hempstead notes an average temperature descent to a refreshing 64.6°F (18.1°C) in September, a small shift from its daytime peak.Humidity
In September, the average relative humidity in West Hempstead is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.7 days and typically collects 0.31" (8mm) of precipitation.Snowfall
In West Hempstead, New York, snow does not fall in April through November.Daylight
In West Hempstead, the average length of the day in September is 12h and 27min.On the first day of September in West Hempstead, sunrise is at 6:22 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index in West Hempstead, New York, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
West Hempstead, NY
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
West Hempstead, 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
West Hempstead, NY
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in September
West Hempstead, NY
- Average humidity in September: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
West Hempstead, NY
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.31").
Average rainfall days in September
West Hempstead, NY
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is July (12.7 days).
The months with the least rainy days are January and November (5.2 days).
Average snowfall in September
West Hempstead, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.2").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
West Hempstead, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
West Hempstead, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
West Hempstead, NY
- Average sunshine days in September: 19 days
The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is June (14.9 days).
Average UV index in September
West Hempstead, 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
West Hempstead, NY
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
West Hempstead, 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).
