September weather forecast and climate
Halesite, NY

The first month of the autumn, September, is also an agreeable month in Halesite, New York, with average temperature varying between 64.2°F (17.9°C) and 72.5°F (22.5°C).

Temperature

In Halesite, the average high-temperature slightly decreases, from a warm 79.2°F (26.2°C) in August, to a pleasant 72.5°F (22.5°C). In September, in Halesite, the average low-temperature is 64.2°F (17.9°C).

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Halesite, during September, the rain falls for 12.8 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 152.5 rainfall days, and 35.04" (890mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Halesite.

Ocean temperature

In Halesite, New York, the average water temperature is 69.6°F (20.9°C).
Note: For most, swimming in 69.6°F (20.9°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Halesite, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in Halesite is 9h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Halesite?

In September, the average high-temperature is 72.5°F (22.5°C), and the average low-temperature is 64.2°F (17.9°C).

What is the average humidity in September in Halesite?

The average relative humidity in September in Halesite is 73%.

How many days does it rain in September in Halesite?

In Halesite, in September, during 12.8 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

When it does not snow in Halesite?

In Halesite, New York, snow does not fall in May through October.

What is the ocean temperature in September in Halesite?

In Halesite, New York, in September, the average water temperature is 69.6°F (20.9°C). Swimming in 69.6°F (20.9°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Halesite have in September?

In September, the average length of the day in Halesite, New York, is 12.4h.

How long on average sun shines in September in Halesite?

The average sunshine in September in Halesite, New York, is 9h.

What is the UV index intensity in September in Halesite?

In Halesite, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Halesite, NY
  • Average high temperature in September: 22.5°C

The warmest month (with the highest average high temperature) is July (26.7°C).
The month with the lowest average high temperature is January (2.8°C).

  • Average low temperature in September: 17.9°C

The month with the highest average low temperature is July (21.8°C).
The coldest month (with the lowest average low temperature) is January (-1.9°C).

Average pressure in September - Halesite, NY
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is November (1019.1mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in September - Halesite, NY
  • Average wind speed in September: 14.6km/h

The windiest month (with the highest average wind speed) is January (19.6km/h).
The calmest month (with the lowest average wind speed) is July (12.5km/h).

Average humidity in September - Halesite, NY
  • Average humidity in September: 73%

Months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).

Average rainfall in September - Halesite, NY
  • Average rainfall in September: 64mm

The wettest month (with the highest rainfall) is July (104mm).
The driest month (with the least rainfall) is January (53mm).

Average rainfall days in September - Halesite, NY
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.1 days).

Average snowfall in September - Halesite, NY
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (45mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is February (4.9 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Halesite, NY
  • Average sea temperature in September: 20.9°C

The best month for swimming (with the highest average sea temperature) is August (23.3°C).
The coldest month (with the lowest average sea temperature) is February (4.3°C).

Average daylight in September / Average sunshine in September - Halesite, NY
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in September - Halesite, NY
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in September - Halesite, NY
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Halesite, NY
  • Average cloud cover in September: 33

The month with the most cloud cover is December (Cloud cover 48).
Months with the least cloud cover are July and August (Cloud cover 29).

Average visibility in September - Halesite, NY
  • Average visibility in September: 10km

Months with the highest visibility are June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April, May and December (9km).