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
September brings a slight decrease in temperature, down from a warm 76.3°F (24.6°C) in August to a pleasant 69.3°F (20.7°C). Throughout September, the temperature tends to fall to a consistent average low of 49.5°F (9.7°C).Humidity
In September, the average relative humidity is 81%.Rainfall
The months with the least rainfall are January and September Rain falls for 14 days and accumulates 2.36" (60mm) of rain.Snowfall
In Upper Lisle, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:46 pm EDT.
Sunshine
In Upper Lisle, New York, the average sunshine in September is 8.5h.UV index
In Upper Lisle, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What is the temperature in September in Upper Lisle?
What is the average humidity in September in Upper Lisle?
What is the driest month in Upper Lisle?
How much does it rain in Upper Lisle in September?
When it does not snow in Upper Lisle?
Does it snow in Upper Lisle in September?
How many hours of daylight does Upper Lisle have in September?
When is the sunrise / sunset in September in Upper Lisle?
How long on average sun shines in September in Upper Lisle?
How high is the UV index in September in Upper Lisle?
Average temperature in September
Upper Lisle, NY
- Average high temperature in September: 69.3°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 (27.3°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in September
Upper Lisle, NY
- Average pressure in September: 30.06"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
Upper Lisle, NY
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Upper Lisle, NY
- Average humidity in September: 81%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May, June and July (80%).
Average rainfall in September
Upper Lisle, NY
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is August (3.27").
The driest months (with the least rainfall) are January and September (2.36").
Average rainfall days in September
Upper Lisle, NY
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in September
Upper Lisle, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (8.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Upper Lisle, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Upper Lisle, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in September
Upper Lisle, NY
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is February (4.8 days).
Average UV index in September
Upper Lisle, 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, February and December (UV index 1).
Average cloud cover in September
Upper Lisle, NY
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in September
Upper Lisle, NY
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Upper Lisle, New York, USA
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