April weather forecastRoslyn Harbor, NY
April
Weather in April
April is a fresh spring month in Roslyn Harbor, New York, with temperature in the range of an average high of 55°F (12.8°C) and an average low of 44.2°F (6.8°C).Temperature
As March transitions into April, a change in temperatures is observed, with average highs moving from a chilly 45.1°F (7.3°C) to a fresh 55°F (12.8°C). The average temperature during April nights dips to a frosty 44.2°F (6.8°C).Humidity
The average relative humidity in April is 72%.Rainfall
In Roslyn Harbor, in April, during 16.1 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. 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 in Roslyn Harbor. April is the last month it regularly snows in Roslyn Harbor. During 0.3 snowfall days, in April, Roslyn Harbor aggregates 0.08" (2mm) of snow. Throughout the year, in Roslyn Harbor, there are 22.2 snowfall days, and 7.24" (184mm) of snow is accumulated.Ocean temperature
In April, the average ocean temperature in Roslyn Harbor is 46°F (7.8°C).Note: Unprotected swimming in 46°F (7.8°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
In Roslyn Harbor, the average length of the day in April is 13h and 20min.On the first day of April in Roslyn Harbor, sunrise is at 6:36 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:50 pm EDT.
Sunshine
The average sunshine in April in Roslyn Harbor is 8.5h.UV index
In Roslyn Harbor, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in April leads to these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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
The 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 pressure in April
Roslyn Harbor, NY
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Roslyn Harbor, NY
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in April
Roslyn Harbor, NY
- Average humidity in April: 72%
The months with the highest relative humidity are February, May and December (75%).
The 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 least 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 least 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").
The months with the least 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).
The months with the least 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: 13h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in April
Roslyn Harbor, NY
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in April
Roslyn Harbor, NY
- Average UV index in April: 4
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, November and December (UV index 2).
Average cloud cover in April
Roslyn Harbor, NY
- Average cloud cover in April: 43
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in April
Roslyn Harbor, NY
- Average visibility in April: 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).
