September weather forecast
Copiague, NY

Share

Weather in September

September, the first month of the autumn in Copiague, is also an agreeable month, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 65.7°F (18.7°C).

Temperature

The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 78.4°F (25.8°C) to an agreeable 72.3°F (22.4°C). During September, Copiague's nights hold steady with an average temperature of 65.7°F (18.7°C), barely dropping from the daytime highs.

Humidity

In Copiague, the average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 13.2 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 158.8 rainfall days, and 31.38" (797mm) of precipitation is accumulated.

Snowfall

In Copiague, snow does not fall in May through September.

Daylight

The average length of the day in September in Copiague is 12h and 27min.
On the first day of September, sunrise is at 6:21 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In Copiague, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
[Resources]

Frequently asked questions

What are September temperatures in Copiague?

In Copiague, 72.3°F (22.4°C) is the average high-temperature and 65.7°F (18.7°C) is the average low-temperature during September.

What is the average humidity in September in Copiague?

In September, the average relative humidity in Copiague, New York, is 74%.

How much does it rain in Copiague in September?

In Copiague, in September, during 13.2 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow in Copiague?

May through September are months without snowfall in Copiague.

Does it snow in Copiague in September?

In Copiague, New York, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Copiague have in September?

The average day length in September in Copiague, New York, is 12h and 27min.

What time are sunrise and sunset in September in Copiague?

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

How many hours of sunshine does Copiague have in September?

In September, the average sunshine duration is 9.1h.

What is the UV index intensity in September in Copiague?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Copiague, NY

Average temperature in September - Copiague, NY
  • Average high temperature in September: 72.3°F

The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in September: 65.7°F

The months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

[Resources]

Average pressure in September
Copiague, NY

Average pressure in September - Copiague, 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).

[Resources]

Average wind speed in September
Copiague, NY

Average wind speed in September - Copiague, NY
  • Average wind speed in September: 10.5mph

The windiest month (with the highest average wind speed) is January (13.9mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).

[Resources]

Average humidity in September
Copiague, NY

Average humidity in September - Copiague, NY
  • Average humidity in September: 74%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is November (71%).

[Resources]

Average rainfall in September
Copiague, NY

Average rainfall in September - Copiague, NY
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.89").

[Resources]

Average rainfall days in September
Copiague, NY

Average rainfall days in September - Copiague, NY
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (9.1 days).

[Resources]

Average snowfall in September
Copiague, NY

Average snowfall in September - Copiague, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.34").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in September
Copiague, NY

Average snowfall days in September - Copiague, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Copiague, NY

Average daylight in September / Average sunshine in September - Copiague, NY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 0min).
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).

[Resources]

Average sunshine days in September
Copiague, NY

Average sunshine days in September - Copiague, NY
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.3 days).

[Resources]

Average UV index in September
Copiague, NY

Average UV index in September - Copiague, 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).

[Resources]

Average cloud cover in September
Copiague, NY

Average cloud cover in September - Copiague, 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 27).

[Resources]

Average visibility in September
Copiague, NY

Average visibility in September - Copiague, 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).

[Resources]

Copiague, New York, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location