September weather forecastClayton, NY
September
Weather in September
September, the first month of the autumn in Clayton, is still a pleasant month, with an average temperature varying between 68.9°F (20.5°C) and 54°F (12.2°C).Temperature
September signifies a gentle decline in Clayton's average high-temperature, easing from a moderately hot 75.7°F (24.3°C) in August to an agreeable 68.9°F (20.5°C). Throughout September, the average low-temperature records at a cool 54°F (12.2°C).Humidity
In Clayton, New York, the average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Clayton. Rain falls for 12.5 days and accumulates 1.5" (38mm) of precipitation.Snowfall
June through September are months without snowfall in Clayton.Ocean temperature
In Clayton, the average seawater temperature in September is 66°F (18.9°C).Note: Most people do not find swimming enjoyable in water of 66°F (18.9°C). The task of controlling breathing becomes tougher as the temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in September in Clayton is 12h and 30min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:40 pm. On the last day of September, in Clayton, sunrise is at 7:01 am and sunset at 6:46 pm EDT.
Sunshine
The average sunshine in September in Clayton is 9.3h.UV index
In Clayton, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Take precautions - Protection against skin and eye damage is obliged. To guard against the harmful effects of the Sun, minimize exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clayton, NY
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in September
Clayton, NY
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Clayton, NY
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Clayton, NY
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Clayton, NY
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is October (2.76").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Clayton, NY
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is October (17.1 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Clayton, NY
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clayton, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Clayton, NY
- Average sea temperature in September: 66.1°F
The best month for swimming (with the highest average sea temperature) is August (70.1°F).
The coldest month (with the lowest average sea temperature) is March (35.5°F).
Average daylight in September /
Average sunshine in September
Clayton, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Clayton, NY
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is January (7.9 days).
Average UV index in September
Clayton, 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
Clayton, NY
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
Clayton, NY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
