Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 76.6°F (24.8°C) to an agreeable 70.7°F (21.5°C). During the nights in September, Knowlesville experiences a consistent average temperature of 57.7°F (14.3°C).Humidity
With an average relative humidity of 75%, September is the least humid month.Rainfall
In Knowlesville, during September, the rain falls for 14.9 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, there are 170.5 rainfall days, and 27.56" (700mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:38 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:55 pm EDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index in Knowlesville is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the least humid month?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Knowlesville, NY
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in September
Knowlesville, NY
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Knowlesville, NY
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in September
Knowlesville, NY
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is September (75%).
Average rainfall in September
Knowlesville, NY
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in September
Knowlesville, NY
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is October (17.6 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
Knowlesville, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Knowlesville, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Knowlesville, NY
- Average daylight in September: 12h and 3min
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 0min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Knowlesville, NY
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is September (13.3 days).
The month with the least sunshine days is February (6 days).
Average UV index in September
Knowlesville, NY
- Average UV index in September: 4
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
Knowlesville, NY
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Knowlesville, 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).
Knowlesville, New York, USA
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