September weather forecastCountry Knolls, NY
September
Weather in September
September, the first month of the autumn in Country Knolls, is still a pleasant month, with an average temperature ranging between min 51.4°F (10.8°C) and max 71.4°F (21.9°C).Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's moderately hot 79.3°F (26.3°C) to a pleasant 71.4°F (21.9°C). Throughout September, Country Knolls experiences a low-temperature average of 51.4°F (10.8°C).Humidity
In Country Knolls, the average relative humidity in September is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.4 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Country Knolls, New York, 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, sunrise is at 6:20 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:37 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In September, the average daily maximum UV index 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 ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Guard yourself - Precautionary measures against sun damage are advocated. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Country Knolls, NY
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Country Knolls, 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
Country Knolls, NY
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are January and April (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Country Knolls, NY
- Average humidity in September: 78%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Country Knolls, NY
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is October (3.07").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Country Knolls, NY
- Average rainfall days in September: 10.4 days
The months with the highest number of rainy days are April and May (16.1 days).
The month with the least rainy days is February (8.6 days).
Average snowfall in September
Country Knolls, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Country Knolls, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Country Knolls, 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: 9h and 6min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Country Knolls, NY
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Country Knolls, 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
Country Knolls, NY
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Country Knolls, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, March, August and September (5mi).
