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
In Commack, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's warm 78.6°F (25.9°C) to a pleasant 72.3°F (22.4°C). Commack's average temperature during the nights of September is recorded at an enjoyable 64.8°F (18.2°C).Humidity
In September, the average relative humidity in Commack is 74%.Rainfall
In Commack, New York, during September, the rain falls for 13.5 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, in Commack, there are 155.9 rainfall days, and 35.94" (913mm) of precipitation is accumulated.Snowfall
In Commack, snow does not fall in April through October.Daylight
In September, the average length of the day in Commack is 12h and 27min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:36 pm EDT.
Sunshine
In September, the average sunshine in Commack is 9.1h.UV index
In September, the average daily maximum UV index in Commack is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What is the average September temperature in Commack?
What is the average humidity in September in Commack?
How much does it rain in Commack in September?
When it does not snow in Commack?
What is the average length of the day in September in Commack?
When is the sunrise / sunset in September in Commack?
How many hours of sunshine does Commack have in September?
What is the UV index intensity in September in Commack?
Average temperature in September
Commack, NY
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in September
Commack, 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
Commack, NY
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in September
Commack, NY
- Average humidity in September: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
Commack, NY
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in September
Commack, NY
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Commack, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Commack, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Commack, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Commack, NY
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in September
Commack, NY
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in September
Commack, NY
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Commack, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Commack, New York, USA
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