September weather forecast
Bellport, NY

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Weather in September

September, the first month of the autumn in Bellport, is also an agreeable month, with an average temperature fluctuating between 71.4°F (21.9°C) and 65.3°F (18.5°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a warm 77.5°F (25.3°C) in August to a pleasant 71.4°F (21.9°C). Bellport encounters an average temperature dip to an enjoyable 65.3°F (18.5°C) throughout September, subtly lower than its daytime maximum.

Humidity

In September, the average relative humidity is 75%.

Rainfall

The months with the least rainfall are January, February and September Rain falls for 12.4 days and accumulates 2.01" (51mm) of rain.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:19 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 5 in September translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Bellport in September?

The high-temperature, in September, in Bellport, is 71.4°F (21.9°C), while the low-temperature averages to 65.3°F (18.5°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

What is the driest month?

The months with the least rainfall are January, February and September Rain falls for 12.4 days and accumulates 2.01" (51mm) of rain.

How much does it rain in September?

In September, the rain falls for 12.4 days. Throughout September, 2.01" (51mm) of precipitation is accumulated.

When it does not snow in Bellport?

May through October are months without snowfall.

How many hours of daylight does Bellport have in September?

In Bellport, the average day length in September is 12h and 27min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

How many hours of sunshine does Bellport have in September?

In Bellport, the average sunshine duration in September is 9.1h.

How high is the UV index in September?

In Bellport, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk 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
Bellport, NY

Average temperature in September - Bellport, NY
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 65.3°F

The months with the highest average low temperature are July and August (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in September
Bellport, NY

Average pressure in September - Bellport, 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
Bellport, NY

Average wind speed in September - Bellport, NY
  • Average wind speed in September: 11.1mph

The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.6mph).

Average humidity in September
Bellport, NY

Average humidity in September - Bellport, NY
  • Average humidity in September: 75%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).

Average rainfall in September
Bellport, NY

Average rainfall in September - Bellport, NY
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is December (3.31").
The driest months (with the least rainfall) are January, February and September (2.01").

Average rainfall days in September
Bellport, NY

Average rainfall days in September - Bellport, NY
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (9 days).

Average snowfall in September
Bellport, NY

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

The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Bellport, NY

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

The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Bellport, 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 months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Bellport, NY

Average sunshine days in September - Bellport, NY
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is February (12.8 days).

Average UV index in September
Bellport, NY

Average UV index in September - Bellport, 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
Bellport, NY

Average cloud cover in September - Bellport, NY
  • Average cloud cover in September: 31

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in September
Bellport, NY

Average visibility in September - Bellport, 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).

Bellport, New York, USA

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