Manorhaven
New York, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Manorhaven, NY

September, the first month of the autumn, in Manorhaven, is also a moderately hot month, with average temperature ranging between min 62.8°F (17.1°C) and max 73.9°F (23.3°C).

Temperature

In Manorhaven, the average high-temperature marginally drops, from 81.1°F (27.3°C) in August, to a still warm 73.9°F (23.3°C). The average low-temperature, in September, is 62.8°F (17.1°C).

Humidity

In Manorhaven, the average relative humidity in September is 73%.

Rainfall

In Manorhaven, during September, the rain falls for 13.9 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 168.7 rainfall days, and 36.69" (932mm) of precipitation is accumulated.

Snowfall

In Manorhaven snow does not fall in May through October.

Ocean temperature

In Manorhaven, the average water temperature is 70.2°F (21.2°C).
Note: For most, swimming in 70.2°F (21.2°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

The average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 9h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Manorhaven?

The average high-temperature, in September, in Manorhaven, New York, is 73.9°F (23.3°C), while the average low-temperature is 62.8°F (17.1°C).

What is the average humidity in September in Manorhaven?

In Manorhaven, the average relative humidity in September is 73%.

How much does it rain in Manorhaven in September?

In September, in Manorhaven, the rain falls for 13.9 days. Throughout September, 2.52" (64mm) of precipitation is accumulated.

When it does not snow in Manorhaven?

May through October are months without snowfall.

What is the ocean temperature in September in Manorhaven?

In Manorhaven, the average seawater temperature in September is 70.2°F (21.2°C). For most, swimming in 70.2°F (21.2°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).

How many hours of daylight does Manorhaven have in September?

The average length of the day in September in Manorhaven, New York, is 12.4h.

How many hours of sunshine does Manorhaven have in September?

In Manorhaven, New York, the average sunshine in September is 9h.

How high is the UV index in September in Manorhaven?

The average daily maximum UV index in September in Manorhaven is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Manorhaven, NY
  • Average high temperature in September: 73.9°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in September: 62.8°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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

Months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (70%).

Average rainfall in September - Manorhaven, NY
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the lowest rainfall) is February (2.36").

Average rainfall days in September - Manorhaven, NY
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the lowest number of rainy days is January (9.2 days).

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

The month with the highest snowfall is March (2.32").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (7.5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Manorhaven, NY
  • Average sea temperature in September: 70.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

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

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

  • Average sunshine in September: 9h

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

Average UV index in September - Manorhaven, 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).