Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The start of April brings a shift in the average high-temperature, increasing from March's frosty 44.6°F (7°C) to a fresh 53.8°F (12.1°C). Old Westbury documents a consistent average low-temperature of 44.8°F (7.1°C) at night during April.Humidity
In April, the average relative humidity is 73%.Rainfall
In Old Westbury, in April, during 10.3 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Old Westbury, during the entire year, the rain falls for 103.6 days and collects up to 7.83" (199mm) of precipitation.Snowfall
In Old Westbury, New York, snow does not fall in April through November.Daylight
In April, the average length of the day is 13h and 20min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:53 am and sunset at 7:50 pm EDT.
Sunshine
In Old Westbury, New York, the average sunshine in April is 8.5h.UV index
In April, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during April leads to these advisories:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
What are April temperatures in Old Westbury?
What is the average humidity in April in Old Westbury?
How many days does it rain in April in Old Westbury?
When it does not snow in Old Westbury?
Does it snow in Old Westbury in April?
What is the average length of the day in April in Old Westbury?
What time are sunrise and sunset in April in Old Westbury?
How many hours of sunshine does Old Westbury have in April?
What is the UV index reading in April in Old Westbury?
Average temperature in April
Old Westbury, NY
- Average high temperature in April: 53.8°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in April: 44.8°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in April
Old Westbury, NY
- Average pressure in April: 29.98"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 April
Old Westbury, NY
- Average wind speed in April: 10.9mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in April
Old Westbury, NY
- Average humidity in April: 73%
The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).
Average rainfall in April
Old Westbury, NY
- Average rainfall in April: 0.75"
The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in April
Old Westbury, NY
- Average rainfall days in April: 10.3 days
The month with the highest number of rainy days is July (11.3 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in April
Old Westbury, NY
- Average snowfall in April: 0"
The month with the highest snowfall is March (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in April
Old Westbury, NY
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Old Westbury, NY
- Average daylight in April: 13h and 2min
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 3min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in April
Old Westbury, NY
- Average sunshine days in April: 17.8 days
The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is July (16.9 days).
Average UV index in April
Old Westbury, 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 and December (UV index 2).
Average cloud cover in April
Old Westbury, NY
- Average cloud cover in April: 43
The month with the most cloud cover is December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in April
Old Westbury, 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).
Old Westbury, New York, USA
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