September weather forecastGriffins Mills, NY
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Griffins Mills, New York, with an average temperature varying between 70.9°F (21.6°C) and 53.2°F (11.8°C).Temperature
With September's onset, the weather reveals a slight temperature decrease, transitioning from a moderately hot 76.8°F (24.9°C) in August to a pleasant 70.9°F (21.6°C). An average low-temperature of 53.2°F (11.8°C) is observed during September nights.Humidity
May, July and September, with an average relative humidity of 78%, are the least humid months.Rainfall
September is the month with the least rainfall in Griffins Mills. Rain falls for 15.5 days and accumulates 1.77" (45mm) of precipitation.Snowfall
June through September are months without snowfall in Griffins Mills.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:57 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Griffins Mills, NY
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Griffins Mills, 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
Griffins Mills, NY
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Griffins Mills, NY
- Average humidity in September: 78%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are May, July and September (78%).
Average rainfall in September
Griffins Mills, NY
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Griffins Mills, NY
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
Griffins Mills, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Griffins Mills, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Griffins Mills, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Griffins Mills, NY
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is September (11.9 days).
The month with the least sunshine days is February (5.3 days).
Average UV index in September
Griffins Mills, NY
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Griffins Mills, NY
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Griffins Mills, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).
