Roslyn Harbor
New York, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Roslyn Harbor, NY

April in Roslyn Harbor, New York, is a cool spring month, with average temperature fluctuating between 44.2°F (6.8°C) and 55°F (12.8°C).

Temperature

In April, the average high-temperature rises, from a chilly 45.1°F (7.3°C) in March, to a cool 55°F (12.8°C). In Roslyn Harbor, in April, the average low-temperature is 44.2°F (6.8°C).

Humidity

In Roslyn Harbor, the average relative humidity is 72%.

Rainfall

In Roslyn Harbor, in April, it is raining for 16.1 days, with typically 3.23" (82mm) of accumulated precipitation. In Roslyn Harbor, during the entire year, the rain falls for 165.9 days and collects up to 37.56" (954mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.3 snowfall days, in April, Roslyn Harbor aggregates 0.08" (2mm) of snow. Throughout the year, there are 22.2 snowfall days, and 7.24" (184mm) of snow is accumulated.

Ocean temperature

In Roslyn Harbor, New York, the average seawater temperature is 46°F (7.8°C).
Note: Swimming in 46°F (7.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in April is 13.3h.

Sunshine

In Roslyn Harbor, New York, the average sunshine is 8.5h.

UV index

The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Roslyn Harbor?

In Roslyn Harbor, in April, the average high-temperature is 55°F (12.8°C), and the average low-temperature is 44.2°F (6.8°C).

What is the average humidity in April in Roslyn Harbor?

The average relative humidity in April in Roslyn Harbor is 72%.

How many days does it rain in April in Roslyn Harbor?

In Roslyn Harbor, New York, in April, it is raining for 16.1 days, with typically 3.23" (82mm) of accumulated precipitation.

What is the last month it snows in Roslyn Harbor?

April is the last month it regularly snows in Roslyn Harbor, New York. During 0.3 snowfall days, in April, Roslyn Harbor aggregates 0.08" (2mm) of snow.

What is the water temperature in April in Roslyn Harbor?

In April, the average ocean temperature is 46°F (7.8°C). Swimming in 46°F (7.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Roslyn Harbor have in April?

The average length of the day in April in Roslyn Harbor is 13.3h.

How long on average sun shines in April in Roslyn Harbor?

The average sunshine in April is 8.5h.

What is the UV index reading in April in Roslyn Harbor?

In Roslyn Harbor, New York, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in April - Roslyn Harbor, NY
  • Average high temperature in April: 55°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in April: 44.2°F

Months with the highest average low temperature are July and August (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

Average humidity in April - Roslyn Harbor, NY
  • Average humidity in April: 72%

Months with the highest relative humidity are February, May and December (75%).
Months with the lowest relative humidity are August and November (71%).

Average rainfall in April - Roslyn Harbor, NY
  • Average rainfall in April: 3.23"

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the lowest rainfall) is September (2.4").

Average rainfall days in April - Roslyn Harbor, NY
  • Average rainfall days in April: 16.1 days

The month with the highest number of rainy days is July (17.9 days).
The month with the lowest number of rainy days is January (9.3 days).

Average snowfall in April - Roslyn Harbor, NY
  • Average snowfall in April: 0.08"

The month with the highest snowfall is March (2.01").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in April - Roslyn Harbor, NY
  • Average snowfall days in April: 0.3 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the lowest number of snowfall days are June, July, August, September and October (0 days).

Average sea temperature in April - Roslyn Harbor, NY
  • Average sea temperature in April: 46°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 April / Average sunshine in April - Roslyn Harbor, NY
  • Average daylight in April: 13.3h

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 April: 8.5h

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 April - Roslyn Harbor, NY
  • Average UV index in April: 4

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).